JP2013507814A - Video amplitude modulation - Google Patents

Abstract

  The present invention relates to an I / P (Interlaced to Progressive) converter, and the I / P converter includes a lower sideband amplitude modulator (6), an upper sideband amplitude modulator (7), and the like. The lower sideband amplitude modulator (6) and the upper sideband amplitude modulator (7) each convert an input signal into an output signal, where the lower sideband amplitude modulator The output signal of (6) is a first function of the input signal when the input signal is less than half of the maximum input signal, or the output signal of the lower sideband amplitude modulator (6) Is the second function of the input signal when the input signal is greater than half of the maximum input signal, and the output signal of the upper sideband amplitude modulator (7) If less than half of the input signal The second function or the output signal of the upper sideband amplitude modulator (7) is a third function of the input signal when the input signal is greater than half of the maximum input signal. In this manner, the present invention provides for reproducing the visual experience that a viewer experiences on a CRT (Cathode Ray Tube) display on a progressive display such as an LCD display.

Description

  The present invention relates to the conversion of an interlaced signal into a progressive signal, and more particularly to the conversion of an interlaced video signal into a progressive video signal. The invention further relates to a display that requires doubling the frame rate or resizing the image. In particular, the present invention converts interlaced scans to progressive scans, converts standard resolution signals to high resolution signals, and / or standard frame rates (eg, 50 or 60 Hz), typically doubled or multiplied. It is suitable to improve operational performance by converting to a reduced frame rate (eg, 100 or 120 Hz).

  Since all modern video display technologies, such as LCD, plasma, LCOS and DLP, are inherently progressive displays, conversion of the raw materials is usually required when the raw materials are provided in an interlaced manner. This conversion is usually called deinterlacing. For example, a deinterlacer converts a video field into a video frame, where the field is a frame or video containing half of the information contained in one frame, such as a CRT display or LCD Half of the scan lines that form the image on the display. In video, the frame is one of many still images that are displayed continuously to create an impression of motion on the screen. The two fields contain one video frame. When the above field is displayed on the video monitor, the contents of one field are usually used for all odd-numbered scan lines on the screen, and the other fields are usually displayed on even-numbered scan lines. Therefore, the fields are interlaced.

  In general, converting a field to a still frame image requires a process called deinterlacing, in which missing scanlines are reproduced or interpolated and included in the discarded field. Reproduce the information that would have been. However, since each field contains only half of the complete field information, the deinterlaced image does not have a full frame resolution. In other words, deinterlacing is the process of reconstructing scan lines that are missing in the interlaced field. In order to deal with this, it is known to insert a black line at the position of the missing scanning line based on the prior art. Of course, in this method, the image contrast is divided by a factor of 2, but in some situations this method is more than the other motion adaptive interlacing techniques known from the prior art. preferable.

  Similarly, in modern display technology, a second video format conversion is often used because LCD monitors have a default display resolution and can often handle very high resolutions compared to standard-definition video signals. Done. Image resizing or scaling, such as linear convolution or cubic convolution, is often used to convert or upsample standard resolution signals to high resolution signals on modern displays as described above. As described by the prior art, in some cases even better approaches of synchronized ideal reconstruction are used. Although these resizing algorithms produce reliable results, all of these linear convolutions suffer from some blur added to the video image.

  Currently, wide UXGA monitors having 1920 × 1200 pixels are widely used. The monitor can process HD video signals. When displaying SD video signals, doubling the number of pixels in both dimensions is a good choice for obtaining high quality images. In this special case, the present invention will improve the image quality by keeping the original image as sharp as possible.

  Similarly, a third video format conversion is often performed in modern display technology because LCD monitors can handle high frame rates. For example, for a video signal having a field rate of about 60 Hz, once deinterlaced, the signal has an effective frame rate of 60 Hz. With an LCD panel capable of displaying images at 120 Hz, the original frame rate can be converted from 60 Hz to 120 Hz. Since the LCD panel known from the prior art must be driven with an alternating voltage to avoid ionization within the liquid crystal structure, each pixel of the panel is alternately driven by a positive voltage and a negative voltage. Driven. However, due to undesirable physical technical constraints, these two voltage states do not always produce exactly the same light output. Depending on the inversion method used to convert the video signal, the viewer will notice some form of the image flicker. The inversion method may be dot line inversion of frame inversion in the case of line inversion and surface switching.

  Other display technologies known from the prior art use pulsating illumination techniques such as scanning an LED-based black line in an LCD monitor, pulsing the lamp, or rotating the light intensity of the internal projector. Other embodiments include, on LCOS, the LCD display panel normally hides the video data during half of the display frame, taking care not to receive DC voltage. Inserting a black frame reduces motion blur on hold-type displays such as LCD, DLP or plasma.

  However, all of these embodiments known from the prior art tend to approach CRTs that improve motion performance at the expense of light output. In the case of the black frame insertion described so far, the light output is divided by a factor of 2, like the display contrast.

  The present invention provides a display method and display device for converting an interlaced signal into a progressive signal, and more particularly for converting an interlaced video signal into a progressive video signal. The present invention further relates to a display method and a display device that require doubling the frame rate or resizing the image.

  In particular, the present invention converts interlaced scans to progressive scans, converts standard resolution signals to high resolution signals, and / or standard frame rates (eg, 50 or 60 Hz), typically doubled or multiplied. It is suitable to improve operational performance by converting to a reduced frame rate (eg, 100 or 120 Hz).

  Preferred embodiments of the invention are set out in the independent and dependent claims. The present invention provides all diverse methods and apparatus having general technical features.

  Accordingly, the present invention provides a video processing apparatus for processing a video signal displaying an image frame, the apparatus comprising a lower sideband amplitude modulator and a sideband amplitude modulator, wherein the lower side The waveband amplitude modulator and the upper sideband amplitude modulator each convert an input signal into an output signal, where the output signal of the lower sideband amplitude modulator has a maximum input of the input signal. If it is less than half of the signal, it is a first function of the input signal, or the output signal of the lower sideband amplitude modulator is the input if the input signal is greater than half of the maximum input signal. A second function of the signal, and the output signal of the upper sideband amplitude modulator is a second function of the input signal when the input signal is less than half of the maximum input signal, or the upper sideband The output signal of the band amplitude modulator is If the input signal is greater than half the maximum input signal, a third function of the input signal.

  The present invention also provides an apparatus for performing I / P (Interlaced to Progressive) conversion, or for scaling an image, or for reducing motion blur in an image, the image comprising at least one scan line including.

  For example, the present invention provides an I / P converter, and the I / P converter includes a lower sideband amplitude modulator and a sideband amplitude modulator, the lower sideband amplitude modulator, and the Each of the upper sideband amplitude modulators converts an input signal into an output signal, where the output signal of the lower sideband amplitude modulator is less than half of the maximum input signal. , The first function of the input signal, or the output signal of the lower sideband amplitude modulator is a second function of the input signal if the input signal is greater than half of the maximum input signal. The output signal of the upper sideband amplitude modulator is a second function of the input signal when the input signal is less than half of the maximum input signal, or the output of the upper sideband amplitude modulator Signal is greater than half of the maximum input signal. If no, the third function of the input signal.

  Except for extreme values, for each value of the input signal, the value of the output signal of the lower sideband amplitude modulator is always lower than the value of the output signal of the upper sideband amplitude modulator. For any given value of the input signal, the average value of the output signal of the lower sideband and upper sideband amplitude modulators corresponding to the given value of the input signal is the input There is a non-linear or gamma corrected output value equal to the value of the signal or for any given value of the input signal, and the lower side corresponding to the given value of the input signal The average value of the output signal of the waveband and the upper sideband amplitude modulator is equal to the nonlinear or gamma corrected output value for the given input signal.

  The present invention is therefore based on the central concept that the output signal is modulated according to the function of the input signal. In this manner, the present invention provides for reproducing the visual experience that a viewer experiences on a CRT (Cathode Ray Tube) display on a progressive display such as an LCD display. In particular, the present invention reduces motion blur and / or blur while displaying an image of a moving object on a progressive display, such as soccer on an LCD screen. The present invention further provides for easy de-interlacing of interlaced video data to reduce the loss of severe sharpness and scale the video data.

  The input signal and / or the output signal of the present invention are not limited to 8-bit coded data or black and white data. Other encoding schemes known to those skilled in the art are possible. In individual embodiments, the output signal is provided by a lookup table based on the input signal. In certain embodiments, the maximum output signal is a factor of the maximum input signal, for example, the maximum output signal can be twice the maximum input signal. Preferably, the input signal is interlaced, originally intended to be displayed on a CRT screen, eg monochrome signal (black and white), YuV data (with or without color sampling), or RGB data Video data.

  In another preferred embodiment of the invention, the device is for delaying and / or filtering the input signal of the lower sideband amplitude modulator or for the input signal of the upper sideband amplitude modulator. A delay screening element for delay and / or screening. In yet another specific embodiment, the delay screening element includes a memory for storing a first field received as the input signal, for example. Accordingly, the delay selection element prepares to delay the received interlaced video data stream for at least one field period. More preferably, a second or more delay screening element is provided to enhance the quality of the image processing. In this method, the delay screening element prepares to insert data generated from the next field and the previous field into the current field. The delay screening element may include a high-level FIR filter to reconstruct scanlines that are included in the field and missing by using an intra-field interpolation method. The intra-field reconstruction at the position of the missing scan line is for selecting an insertion between the next field and the previous field or a spatial interpolation between the next field and the previous field. May be needed for reference. The delay screening element may further include a median value for selecting a median value of three consecutive fields. By selecting the median value, a detection value to be inserted for the missing scan line is ensured.

  In general, the input signal may include any type of video signal. However, according to another preferred embodiment of the present invention, the input signal includes an input frame, and the input frame includes a first input field corresponding to an even-numbered scan line or an odd-numbered scan line and an odd-numbered scan line, respectively. And a second input field corresponding to an even-numbered scan line. According to still another preferred embodiment of the present invention, the output signal includes an output frame, and the output frame is modulated by the upper sideband amplitude modulator or the lower sideband amplitude modulator, respectively. A first output field corresponding to the first input field, and a second output field corresponding to the second input field modulated by the lower sideband amplitude modulator or the upper sideband amplitude modulator. In this method, the input signal processed by the lower sideband amplitude modulator may correspond to even-numbered scan lines, and the input signal evaluated by the upper sideband amplitude modulator is odd-numbered. It may correspond to a scanning line. Once amplitude modulated, each scan line can be transmitted for display on a progressive display.

  In another preferred embodiment of the present invention, the input signal includes a first input frame and a second input frame, the output signal includes a first output frame and a second output frame, and the first output frame is A first output field corresponding to a first input field of the first input frame modulated by the upper sideband amplitude modulator or the lower sideband amplitude modulator, respectively, and the lower sideband amplitude modulator Or a second output field corresponding to a second output field of the first input frame modulated by the upper sideband amplitude modulator, wherein the second output frame is respectively the upper sideband amplitude modulator or A first output field corresponding to a first input field of the second input frame modulated by the lower sideband amplitude modulator, and the lower sideband amplitude variation. Vessel or a second output field corresponding to the second output field of the first input frame that is modulated by the upper sideband amplitude modulator.

  According to another preferred embodiment of the present invention, the output signal includes a first output frame and a second output frame, wherein the first output frame is the upper sideband amplitude modulator or the lower sideband, respectively. Modulated by a band amplitude modulator, the second output frame is modulated by the lower sideband amplitude modulator or the upper sideband amplitude modulator. In the above embodiment, the input signal, which is video data to be received, for example, does not need to be in an interlace format. Therefore, motion blur can be reduced on a progressive display that displays the output signal, while contrast and / or brightness are not reduced. Furthermore, the present invention also improves the video quality without the need for any dedicated or special hardware, as in the case of the scaling backlight implementation known from the prior art.

  In still another preferred embodiment of the present invention, the input signal includes an input line, and the output signal includes the following elements. That is, a first output line corresponding to the input line modulated by the upper sideband amplitude modulator or the lower sideband amplitude modulator, and the lower sideband amplitude modulator or the upper sideband amplitude, respectively. And a second output line corresponding to the input line modulated by the modulator.

  Accordingly, the present invention provides for scaling of the input signal so that the input signal can be displayed on a display including, for example, 2n, and thus, the number of scan lines only doubled. N scan lines. In this way, the preferred embodiment, on the one hand, maintains sharpness and is prepared to scale, thus not significantly degrading the video quality.

  In yet another preferred embodiment of the invention, the apparatus includes a crossover switch for routing the output signal of the lower sideband amplitude modulator and for routing the output signal of the upper sideband amplitude modulator. . Thus, the crossover switch routes the input signal as part of the input signal corresponding to the odd or even output line, depending on whether the current field is an even field or an odd field, Then, it is prepared to route the reconstructed output line to the corresponding even-numbered or odd-numbered output line.

  The present invention also provides the following I / P converter. That is, it is assumed that n is an integer equal to or greater than 2, and includes n amplitude modulators that convert an input signal into an output signal. The signal is the first function of the input signal if input signal <maximum input signal × (m−1) / n, input signal> maximum input signal × (m−1) / n, and If input signal <maximum input signal × m / n, it is the second function of the input signal. If input signal> maximum input signal × m / n, I / is the third function of the input signal. P converter.

  Except for extreme values, for each value of the input signal, the value of the output signal of the (m−1) th amplitude amplifier is always lower than the value of the output signal of the mth amplitude amplifier, so that For any given value of the input signal, the average value of the output signals of the n amplitude modulators corresponding to the given value of the input signal is equal to the value of the input signal, or There is a non-linear or gamma corrected output value for any given value of the input signal, and the output signal of the n amplitude modulators corresponding to the given value of the input signal Is equal to the nonlinear or gamma corrected output value for the given input signal.

  Thus, the present invention provides for enhancing the quality of frame rate doubling, where the frame rate doubling factor n may be equal to 2, 3, 4, or any other number.

  According to another preferred embodiment of the invention, the first function of the input signal is equal to the second function of the input signal when the input signal = maximum input signal × (m−1) / n, The second function of the input signal is equal to the third function of the input signal when the input signal = maximum input signal × m / n.

Where f, g, and k are integers, the input signal and the output signal each include f frames, and the g-th amplitude amplifier converts the g + k × n-th frame. More preferably. It is even more preferred that m and g are equal.

  In accordance with another preferred embodiment of the present invention, the apparatus stores a video input and outputs a video data frame memory for outputting the input signal to the amplitude amplifier, and / or an output signal of the amplitude amplifier. Includes a multiplexer to switch. Therefore, the video frame memory is prepared to write an input signal such as a video frame to the memory, for example, to read twice or three times at a speed twice or three times the writing speed. prepare. Preferably, the storage of the video frame is performed while starting the first reading process immediately after half of the frame has been written to the memory so that the waiting time is minimized. The video data frame memory may include a stored DRAM memory device. The multiplexer provides for switching the output of the amplitude amplifier, so that, for example, a first of the images displayed using the first amplitude amplifier while a repeating frame is addressed to the second amplitude amplifier. Prepare to switch frames.

  In general, the first function, the second function, and / or the third function may be any mathematical function. However, according to another preferred embodiment of the invention, the first function of the input signal is zero and / or the second function is a linear function or a curved function of the input signal, or A sigmoid function and / or a third function of the input signal is the maximum input signal. The second function is preferably bent so that the average line light output remains accurate. This means that the present invention does not affect the average linear pixel value. Accordingly, the color is not affected for still images using the present invention. Usually, most of the pixels in the display have a color difference that is well below 50% of the peak value, eg luminance or RGB, as these values are known to be done in the prior art. , Displayed in the same way as black line insertion.

  The present invention is also a method for converting an interlaced input signal into a progressive output signal, wherein the first output signal is generated, and the input signal is smaller than half of the maximum input signal. One output signal is zero, or if the input signal is greater than half of the maximum input signal, the first output signal is a linear function, a curved function, or a sigmoid function of the input signal; Generating a second output signal and the input signal is less than half of the maximum input signal, the second output signal is a linear function, or a curved function, or a sigmoid function of the input signal, or If the input signal is greater than half of the maximum input signal, the second output signal is the maximum input signal.

  Except for extreme values, for each value of the input signal, the value of the first output signal is always lower than the value of the second output signal, so that for any value of the input signal, the first The average value of one output signal and the second output signal is equal to the value of the input signal, or there is a non-linear or gamma corrected output value for any given value of the input signal, and The average value of the first output signal and the second output signal corresponding to the given value of the input signal is the non-linear or gamma corrected output for the given input signal. Equal to the value.

  The present invention is also an apparatus for enlarging or reducing an image having at least one scanning line, and includes a lower sideband amplitude modulator and an upperband amplitude modulator, and the lower sideband amplitude modulator and the Each of the upper sideband amplitude modulators converts an input signal into an output signal, where the output signal of the lower sideband amplitude modulator is less than half the maximum input signal. The first signal of the input signal, or the output signal of the lower sideband amplitude modulator is a second function of the input signal if the input signal is greater than half of the maximum input signal. The output signal of the upper sideband amplitude modulator is a second function of the input signal when the input signal is less than half of the maximum input signal, or the output of the upper sideband amplitude modulator The input signal is half the maximum input signal. Is also a third function of the input signal, the input signal includes an input line, and the output signal is modulated by the upper sideband amplitude modulator or the lower sideband amplitude modulator, respectively. An image including a first output line corresponding to the input line and a second output line corresponding to the input line modulated by the lower sideband amplitude modulator or the upper sideband amplitude modulator. Give the device to do.

  Except for extreme values, for each value of the input signal, the value of the output signal of the lower sideband amplitude modulator is always lower than the value of the output signal of the upper sideband amplitude modulator, For any given value of the input signal, the average value of the output signal of the lower sideband and upper sideband amplitude modulators corresponding to the given value of the input signal is There is a non-linear or gamma corrected output value equal to the value of the input signal, or for any given value of the input signal, and corresponding to the given value of the input signal, The average value of the output signal of the lower sideband and upper sideband amplitude modulators is equal to the non-linear or gamma corrected output value for the given input signal.

  Preferably, the apparatus further delays and / or filters the input signal of the lower sideband amplitude modulator or delays and / or filters the input signal of the upper sideband amplitude modulator. Includes a delay screening element for screening.

  The apparatus may also include a crossover switch for routing the output signal of the lower sideband amplitude modulator and routing the output signal of the upper sideband amplitude modulator.

  The present invention also includes an apparatus for scaling an image having at least one scan line, wherein n is an integer greater than or equal to 2 and includes n amplitude modulators that convert an input signal into an output signal; Assuming that m is an integer greater than 1 and less than or equal to n, the output signal of the mth amplitude modulator is the first function of the input signal when input signal <maximum input signal × (m−1) / n. Yes, if input signal> maximum input signal × (m−1) / n and the input signal <maximum input signal × m / n, it is the second function of the input signal and input signal> maximum input Signal × m / n is a third function of the input signal, the output signal includes m output lines, and the m th output line is the input signal modulated by the m th amplitude modulator. An apparatus for enlarging / reducing an image corresponding to is provided.

  Except for extreme values, for each value of the input signal, the value of the output signal of the (m−1) th amplitude amplifier is always lower than the value of the output signal of the mth amplitude amplifier, so that For any given value of the input signal, the average value of the output signals of the n amplitude modulators corresponding to the given value of the input signal is equal to the value of the input signal, or There is a non-linear or gamma corrected output value for any given value of the input signal, and the output signal of the n amplitude modulators corresponding to the given value of the input signal Is equal to the nonlinear or gamma corrected output value for the given input signal.

Preferably, m-th output line, a time interval Delta] t _k, it is amplitude modulated by an m-th amplitude modulator.

  Optionally, the first function of the input signal is equal to the second function of the input signal when the input signal = maximum input signal × (m−1) / n and the second function of the input signal. The function is equal to the third function of the input signal when the input signal = maximum input signal × m / n.

  For example,

Where f, g, and k are integers, the input signal and the output signal each include f frames, and the g-th amplitude amplifier converts the g + k × n-th frame. To do.

  The apparatus may also include a video data frame memory for storing the video input and outputting the input signal to the amplitude amplifier, and / or a multiplexer that switches the output signal of the amplitude amplifier.

  Optionally, the first function of the input signal is zero and / or the second function is a linear function, or a curved function, or a sigmoid function of the input signal, and / or the input The third function of the signal is the maximum input signal.

  The present invention is also a method for enlarging or reducing an image including at least one scanning line, wherein the first output signal is generated, and when the input signal is smaller than half of the maximum input signal, the first output signal is generated. Is zero, or if the input signal is greater than the maximum input signal, the first output signal is a linear function, a curved function, or a sigmoid function of the input signal, and a second output signal If the input signal is less than half of the maximum input signal, the second output signal is a linear function, a curved function, or a sigmoid function of the input signal, or the input signal is the maximum The second output signal includes a step that is the maximum input signal, the input signal includes an input line, and the output signal corresponds to the first output signal. A first output line that includes a second output line corresponding to the second output signal to provide a method of scaling the image.

  Except for extreme values, for each value of the input signal, the value of the first output signal is always lower than the value of the second output signal, so that for any value of the input signal, the first The average value of one output signal and the second output signal is equal to the value of the input signal, or there is a non-linear or gamma corrected output value for any given value of the input signal, and The average value of the first output signal and the second output signal corresponding to the given value of the input signal is the non-linear or gamma corrected output for the given input signal. Equal to the value.

  The present invention is also an apparatus for reducing motion blur in an image including at least one scan line, comprising a lower sideband amplitude modulator and an upper sideband amplitude modulator, wherein the lower sideband amplitude is Each of the modulator and the upper sideband amplitude modulator converts the input signal into an output signal, where the output signal of the lower sideband amplitude modulator is the maximum input signal. Is less than half of the input signal, or the output signal of the lower sideband amplitude modulator is less than half of the maximum input signal. The second function, and the output signal of the upper sideband amplitude modulator is the second function of the input signal when the input signal is less than half of the maximum input signal, or the upper sideband amplitude The output signal of the modulator is If the force signal is greater than half of the maximum input signal, it is a third function of the input signal, and the output signal includes a first output frame and a second output frame, and each of the first output frames is In the image modulated by the upper sideband amplitude modulator or the lower sideband amplitude modulator, and the second output frame is modulated by the lower sideband amplitude modulator or the upper sideband amplitude modulator. Gives a device for reducing motion blur.

  Except for extreme values, for each value of the input signal, the value of the output signal of the lower sideband amplitude modulator is always lower than the value of the output signal of the upper sideband amplitude modulator, For any given value of the input signal, the average value of the output signal of the lower sideband and upper sideband amplitude modulators corresponding to the given value of the input signal is There is a non-linear or gamma corrected output value equal to the value of the input signal, or for any given value of the input signal, and corresponding to the given value of the input signal, The average value of the output signal of the lower sideband and upper sideband amplitude modulators is equal to the non-linear or gamma corrected output value for the given input signal.

  Preferably, the apparatus delays and / or sorts the input signal of the lower sideband amplitude modulator or delays and / or sorts the input signal of the upper sideband amplitude modulator. To include a delay screening element.

  For example, the input signal includes an input frame, and the input frame corresponds to a first input field corresponding to an even-numbered scan line or an odd-numbered scan line and an odd-numbered scan line or an even-numbered scan line, respectively. And a second input field.

  The apparatus may include a crossover switch for routing the output signal of the lower sideband amplitude modulator and routing the output signal of the upper sideband amplitude modulator.

  The present invention also includes an apparatus for reducing motion blur in an image, including n amplitude modulators that convert an input signal into an output signal, where n is an integer greater than or equal to 2, where m is 1 The output signal of the m-th amplitude modulator is a first function of the input signal when the input signal <maximum input signal × (m−1) / n, If signal> maximum input signal × (m−1) / n and the input signal <maximum input signal × m / n, it is the second function of the input signal, and input signal> maximum input signal × m / N is a third function of the input signal, the input signal includes an input line, the output signal includes m subsequent output lines, and the subsequent m th output line is the m th Corresponding to the input signal modulated by an amplitude modulator of Kick gives the apparatus for reducing motion blur.

  Except for extreme values, for each value of the input signal, the value of the output signal of the (m−1) th amplitude amplifier is always lower than the value of the output signal of the mth amplitude amplifier, so that For any given value of the input signal, the average value of the output signals of the n amplitude modulators corresponding to the given value of the input signal is equal to the value of the input signal, or There is a non-linear or gamma corrected output value for any given value of the input signal, and the output signal of the n amplitude modulators corresponding to the given value of the input signal Is equal to the nonlinear or gamma corrected output value for the given input signal.

  For example, when the input signal = maximum input signal × (m−1) / n, the first function of the input signal is equal to the second function of the input signal, and the second function of the input signal is When the input signal = maximum input signal × m / n, it is equal to the third function of the input signal.

  Optionally

Where f, g, and k are integers, the input signal and the output signal each include f frames, and the g-th amplitude amplifier converts the g + k × n-th frame. To do.

  The apparatus may include a video data frame memory for storing video input and outputting the input signal to the amplitude amplifier, and / or a multiplexer that switches the output signal of the amplitude amplifier.

  Optionally, the first function of the input signal is zero and / or the second function is a linear function, or a curved function, or a sigmoid function of the input signal, and / or the input The third function of the signal is the maximum input signal.

  These and other aspects of the invention will be apparent from and will be elucidated with reference to the embodiments described hereinafter.

FIG. 1 shows an apparatus in a preferred embodiment of the present invention. FIG. 2 shows an apparatus in another preferred embodiment of the present invention. FIG. 3 shows an apparatus in another preferred embodiment of the present invention. FIG. 4 is a typical histogram of an actual image. FIG. 5 shows the output signal of the upper sideband amplitude modulator and the output signal of the lower sideband amplitude modulator according to a preferred embodiment of the present invention. FIG. 6 shows a look-up table for the basic values used by the upper sideband amplitude modulator and the lower sideband amplitude modulator according to a preferred embodiment of the present invention. FIG. 7 shows the operation of a typical LCD panel at different viewing angles. FIG. 8 illustrates the operation of another exemplary LCD panel at different viewing angles for video data modulated in accordance with a preferred embodiment of the present invention. FIG. 9 illustrates the operation of another exemplary LCD panel at different wide viewing angles for video data modulated in accordance with a preferred embodiment of the present invention. FIG. 10 shows a video signal including spatial and temporal information divided into even and odd fields. FIG. 11 shows the reconstructed frame of FIG. FIG. 12 shows the reconstructed frame of FIG. 10 when the two fields are displayed with no overlap in time intervals. FIG. 13 shows even and odd fields across different time intervals. FIG. 14 illustrates different frames that can be displayed on a progressive display by combining consecutive even and odd fields according to a preferred embodiment of the present invention. FIG. 15 shows, in a different way, different frames that can be displayed in progressive display play by combining consecutive even and odd fields according to a preferred embodiment of the present invention. FIG. 16 shows an image or video displayed on a progressive display divided into a plurality of scanning lines. FIG. 17 shows the image or video of FIG. 16 amplitude modulated according to a preferred embodiment of the present invention. FIG. 18 shows the image or video of FIG. 16 amplitude modulated according to another preferred embodiment of the present invention. FIG. 19 illustrates an image or video that is amplitude modulated and displayed on a progressive display in accordance with another preferred embodiment of the present invention. FIG. 20 illustrates another apparatus for enhancing frame doubling in accordance with a preferred embodiment of the present invention. FIG. 21 illustrates another apparatus for enhancing frame tripling according to another preferred embodiment of the present invention. FIG. 22 illustrates the effect of pulsating light for different video component levels according to another preferred embodiment of the present invention.

  The present invention will be described with respect to certain embodiments and with reference to the drawings but the invention is not limited thereto but only by the claims. The drawings depicted are only schematic and are non-limiting. In the figures, for illustrative purposes, the size of some of the components may be exaggerated and not drawn to actual size. Furthermore, terms such as first, second, third, etc. in the description and claims are used to identify similar components, and are not necessarily for describing the numerical order or time series. is not. It is understood that the terms so used can be replaced under appropriate circumstances, and that the embodiments of the invention described herein can be operated in numerical order other than those described and illustrated herein. It should be understood.

  Further, terms such as top, bottom, above, below in the description and the claims are used for the purpose of explanation and do not necessarily describe relative positions. The terms so used can be replaced under appropriate circumstances, and the embodiments of the present invention described herein can be implemented in locations other than those described and illustrated herein. Should be understood.

  The term “consisting of” used in the claims should not be construed as limited to the means listed after the word. In other words, other components and steps are not excluded. Therefore, when the expression “an apparatus composed of means A and means B” is considered, it should not be limited to an apparatus composed only of means A and means B. That means that in the context of the present invention, the only relevant components of the device are A and B.

  FIG. 1 shows an apparatus according to a preferred embodiment of the present invention for improving the deinterlacing quality of a video signal. The video input signal 1 may include single-color signals, that is, YuV data of black and white, regardless of the presence or absence of color subsampling or RGB data. The video input signal 1 includes a plurality of frames. Each frame contains two fields, and each field contains half of the frame information. The field delay unit 2 delays the video input 1, which is a flow of interlace video data, for a period of one field. Although not essential, the second field delay unit 2 is used to improve the quality of video processing. In this way, three consecutive fields of data are available for subsequent processing. Thus, it is possible to insert data from the next field and the previous field into the current field. Obviously, this type of processing introduces one field of latency and, as is known from the prior art, some algorithms only look back and use only the previous field for insertion. This is the reason. The multi-line delay unit 3 delays the interlace video data stream by several scanning line periods. Although this is not essential, the multi-line delay unit 3 is used to improve the quality of image processing. Temporary intra-field spatial reconstruction will be of higher quality because it allows for a higher level of filtering when taking into account the closer to the original video scan line.

  The high level FIR filter unit 4 reconstructs the missing scan line using intra-field interpolation. Intra-field reconstruction at the location of the missing scan line is used as a reference to select either insertion or spatial interpolation between the next field and the previous field. If the previous field and the next field cannot be inserted into the current field, the spatially interpolated scan line is used to fill in the missing scan line in the current field. The simple average of the scan lines above and below the missing scan line is a first order approximation that requires only one scan line delay.

  The median part 5 selects the median of three consecutive fields. The original scan lines from the next field and the previous field are supplied to the median part 5. The other input comes from the intra-field reconstructed cubic FIR filter unit 4. Thus, choosing a median value ensures a value that is suitable for insertion for a missing scan line.

  The lower-band amplitude modulator 6 and the upper-band amplitude modulator 7 are the most important members of the present invention and will be described later. The lower waveband amplitude modulator 6 is also referred to as the lower waveband part, and the upper waveband amplitude modulator 7 is also referred to as the upper waveband part, and more commonly referred to as an “amplitude modulator”.

  The 2: 2X switch is a cross-type switch 8 that sends odd and even scan lines to the output of the enhanced deinterlacing unit as described in the present invention. To the video processing unit. Depending on whether the current field 9 is an even field or an odd field, the switch 8 sends the reconstructed scan line to the corresponding even output or odd output, while sending the original scan line to the corresponding even output or Send to odd output. As described above, the output signals of the switch 8 are the video output even scanning line 10 and the video output odd scanning line 11.

  FIG. 2 illustrates the use of a first order “averaging” FIR filter unit 12 as a possible lower cost embodiment compared to FIG. This in some cases leads to a reduction in the resolution of the moving image, but the benefits provided by the present invention remain the same. Each different waveband improves the motor performance by minimizing the hold effect applied to the field data, as will be described in detail later. The primary “averaging” FIR filter unit 12 receives the supply from the line delay unit 13.

  FIG. 3 shows a possible use of the “arbitrary algorithm” 14 in combination with the waveband, which is preferred as an embodiment of the present invention. Such an algorithm includes a standard median filter that picks out the median of three numeric, or three pixel video values. The above three pixels are the pixels in the same column in the upper scan line of the current missing scan line, the pixels in the same column in the lower scan line, and the current scan line is not missing. The pixel at the same position in the previous field. Therefore, as mentioned in the above description, the delay filter unit includes the field delay unit 2, the multi-line delay unit 3, the high level FIR filter unit 4, the median value unit 5, the average value filter unit 12, and the like. , The line delay unit 12 and / or “arbitrary algorithm” may be combined.

  A further simplification means is that while applying the “upper” waveband to the data, the previous field after applying the “lower” waveband to the data is moved into the original scan line of the current field. It is simply to insert into.

  As shown in FIGS. 1-3, the video amplitude of the original scan line is modulated differently than the scan line reconstructed by the “upper sideband” and “lower sideband” portions. However, full black and full white levels are not affected. This means that a completely white object with a black background is not affected by any color space. In the RGB color space, the following fully saturated colors: black, white, green, red, blue, yellow, purple, cyan (cyan) are not affected.

  For example, the movement of white text scrolling over a black background is not improved by video amplitude modulation. In a “real life” environment, the average brightness of a typical image ranges from 10% to 18% of the highest “white peak” value. A typical histogram of such an image is shown in FIG. FIG. 4 illustrates the fact that most pixels use only a portion of the usable luminance range. This means that the video amplitude modulation by the “upper sideband” and “lower sideband” has a significant impact on the majority of pixels, as shown in FIG.

  FIG. 5 shows the wavebands used for each of the original scan line (upper sideband) and the inserted reconstructed scanline (lower sideband). The absolute values serving as the basis of this figure are listed in the table of FIG.

  The values in FIG. 6 are values shown in the case of 8-bit linear processing. In many high-end applications, gamma is used to achieve better recognized color coding. In such a case, the signal is converted into a linear region that increases the bit depth of various color differences.

  Of course, the table will vary depending on the actual bit depth. In some cases, it is not necessary to de-gamma the input value. In such a case, the wavebands shown in FIGS. 5 and 6 will be bent so that the average line light output remains correct. In other words, the average linear pixel value is not affected. No color is affected by this modulation in the still image.

  The correct value is ensured as follows. For an arbitrary value of the input signal, the average value of the output signals of the lower sideband and upper sideband amplitude modulators corresponding to the arbitrary value of the input signal is equal to the value of the input signal. Or, there is a non-linear or gamma corrected output value for any value of the input signal, and the average of the output signals of the lower sideband and upper sideband amplitude modulators corresponding to any value of the input signal The value is equal to the non-linear or gamma corrected output value for any input signal.

  The object of the present invention is to approach the effect of pulsating illumination seen on interlaced CRT displays. Each scanned field displaying just one scene should ideally be displayed within the duration of that field, just as the CRT display displays at the position of the original interlaced scan line. is there. While applying the “upper sideband” to the original scanline, this effect is well approximated by processing the insertion scanline using the “lower sideband”. Most of the image will be displayed in an interlaced manner, just like a CRT display. Most of the pixels have luminance or color differences that include RGB, much lower than 50% of the peak value, so these values are represented in the same way that black line insertion is performed. The

  For values above 50%, the “lower sideband” does not produce an inserted black line, but instead maximizes the effective pulsation while maintaining an accurate average of all color differences. The effect is used. Only the brightest peak is unaffected by both wavebands, and therefore does not improve motion performance while transitioning between any two extreme peak values. This restriction has little effect on any real-world image sequence, such as when used for broadcast.

  By providing pulsating illumination, the value of the output signal of the lower sideband amplitude modulator is such that the value of the output signal of the upper sideband amplitude modulator for each value of the input signal, excluding extreme values, ie black or white Always lower than the value of.

  The purpose of video amplitude modulation is to improve athletic performance while maintaining the accuracy of the total natural color, as explained above. However, modulated video positively affects color recognition on direct view LCD panels when the panel is otherwise used. The perceived color enhancement depends on the viewing angle. FIG. 7 shows the operation of a typical LCD panel at different viewing angles. As shown here, so-called display gamma is affected by viewing angle.

  When the video data is modulated as shown in FIG. 5, the viewing angle dependency changes as shown in FIG.

  In the right angle viewing state, the display gamma wave bands of FIGS. 7 and 8 are equal. In wide viewing angle viewing conditions, it is clear that undesirable color shifts that depend on viewing angle are reduced when using video amplitude modulation according to the present invention. FIG. 9 shows the improvement in viewing angle dependence by using the present invention.

  The benefits described above for mitigating color drift are also effective for all possible embodiments of the present invention. These include the extended deinterlacing method and the extended frame rate increasing method. The benefits of reducing color drift are only effective for displays such as direct view LCD screens, and are not effective for DLP projection, for example.

For example, in order to display a certain k-th video or frame as in a CRT display, a video signal including spatial information and temporal information includes an even (E) field and an odd (O) field as shown in FIG. ) Is divided into fields. In the first stage, the information contained in the even field is displayed. Once all the even scan lines are “drawn” on the CRT screen by the electron beam, the odd scan lines are displayed. By doing this at a frequency higher than the cut-off frequency of the human eye, a human viewer can see that even though the two fields are displayed between the time intervals Δt ₁ and Δt ₂ with no overlap, You will see the reconstructed frame as shown in

  In the present invention, in order to display the frame of FIG. 10 on a progressive display, the first field is received and stored by a memory or a “field delay unit” (see FIG. 3). For the sake of clarity only, assume that the first field is the even field shown in FIG.

  When the first scan line of the second field, the first odd scan line in this example, is received or can be displayed, the display on the progressive display according to the present invention proceeds as follows.

  The data for the first even scan line is amplitude modulated by the “lower sideband” amplitude modulator 6 and sent to the display on the progressive display. The first odd scan line data is amplitude modulated by an “upper sideband” amplitude modulator 7. The data of the second even scan line is amplitude modulated by the “lower sideband” amplitude modulator 6 and sent to the display on the progressive display. The display of the even and odd scan lines proceeds each time the even scan lines are received one after another or become displayable. The “odd” scan line data is amplitude modulated by the “upper sideband” amplitude modulator 7, and the “even” scan line data is amplitude modulated by the “lower sideband” amplitude modulator 6. Once amplitude modulated, each scan line or data on each scan line is sent out for display on a progressive display.

  Alternatively, the amplitude modulation and display may be delayed until the second field is completely received or stored by the memory or field delay unit.

The even and odd fields of “various frames” may be combined. For example, consider the kth and (k + 1) th fields and frames in FIG. Scan line of data or even field E _k of the even field E _k is an amplitude-modulated by the first amplitude modulation F _1. On the other hand, a plurality of scan lines of data or even field O _k of the odd field O _k is amplitude modulated by the second amplitude modulation F _2. A combined scan line or a set of (F ₁ × E _k , F ₂ × O _k ) is sent one after another to the display on the progressive display.

When the (k + 1) th even field is received or becomes available, it can be combined with the previous kth odd field. That is, the data or scanning line in the odd field O _k is now amplitude modulated by the first amplitude modulation F ₁ , while the data or scanning line in the even field E _{k + 1} is amplitude modulated by the first amplitude modulation F _2. become. A combined scan line or a set of (F ₂ × E _{k + 1} , F ₁ × O _k ) is successively sent to the display on the progressive display.

Similarly, once the (k + 1) th odd field is received or can be displayed, it can be combined with the (k + 1) th even field. That is, the data or scanning line in the odd field O _k is now amplitude modulated by the first amplitude modulation F ₁ , while the data or scanning line in the even field E _{k + 1} is amplitude modulated by the first amplitude modulation F _2. become. A combined scan line or a set of (F ₁ × E _{k + 1} , F ₂ × O _{k + 1} ) is successively sent to the display on the progressive display.

FIG. 14 shows various frames that can be displayed on a progressive display by combining consecutive even and odd fields. The time interval during the display of arbitrarily combined fields and the time at which the display starts may vary depending on the display usage, and may be, for example, memory or available There is a possibility that it depends on the size of the field delay section and the memory access speed. One example is shown in FIG. The times t ₁ , t ₂ , t ₃ , t ₄ , and t ₅ in FIG. 8 are the same as those described in FIG.

  In a further embodiment of the present invention, the received video data need not be interlaced when utilizing the present invention. However, the present invention aims to reproduce the visual experience experienced on a CRT display on a progressive display, so that fields and frames that specify image data displayed during individual time intervals are used. Still relevant.

In this embodiment, an image or video to be displayed on a progressive display is divided into a plurality of scanning lines (L ₀ , L _{1 to} L _{5 in} FIG. 16). In the first time interval Δt ₁ of the frame interval (Δt ₁ + Δt ₂ ), the data or the scanning line is amplitude-modulated by the first amplitude modulation F ₁ or the “upper side band” (FIG. 3). In the second time interval Δt ₂ of the frame interval (Δt ₁ + Δt ₂ ), the data or the scanning line is amplitude-modulated by the second amplitude modulation F ₂ or the “lower sideband” (FIG. 16). While the first time interval Δt ₁ and the second time interval Δt ₂ correspond to the time intervals assigned to the even and odd fields shown in FIG. 11 or FIG. All images or all scanning lines (even and odd scanning lines) are displayed.

  The value of the output signal of the lower sideband amplitude modulator is always lower than the value of the output signal of the upper sideband amplitude modulator for each value of the input signal, except for extreme values.

A frame time interval (typically lasting 16 milliseconds or 32 milliseconds) may be divided into two or more intervals. For each divided time interval Δt _k (FIG. 18), the data or scan line can be amplitude modulated by a specific amplitude modulation F _k .

  The purpose of the amplitude modulation proposed in this embodiment is to reduce the motion blur typical of progressive type displays. Normally, this motion blur is eliminated by inserting a black frame or scanning the backlight. Contrary to what happens by inserting a black frame, the proposed invention reduces motion blur without reducing contrast and / or brightness. The proposed invention also improves video quality without requiring dedicated hardware such as a scanning backlight and / or special hardware.

  When an image composed of N scanning lines is desired to be displayed, for example, when displayed on a display composed of twice as many scanning lines, a problem of enlargement / reduction occurs. Within this embodiment, the present invention is not limited to interlaced data. In the well-known technique of “scaling” an image of N scan lines and fitting the image to a display with 2N scan lines, each scan line is simply doubled.

This scanning line doubling known from the prior art system is accompanied by a reduction in resolution, which clearly lowers the quality of the image. In order to prevent degradation of video quality, or at least to reduce degradation of video quality, the present invention proposes to modulate the amplitude of data or scanning lines as shown in FIG. The amplitude of the original scan line (eg, L ₀ ) is modulated by the first amplitude modulation or “upper sideband” to produce F ₁ × L ₀ , and the “pair” amplitude is the second amplitude modulation or “lower” Modulated by “sideband” to generate, for example, F ₂ × L ₀ .

  The value of the output signal of the lower sideband amplitude modulator is always lower than the value of the output signal of the upper sideband amplitude modulator for each value of the input signal, except for extreme values.

  The following embodiments show means for improving athletic performance when using frame rate increase. Although not limited to the increase factors described below, only examples of frame rate increases of 2 and 3 will be described. Obviously, similar embodiments are recognized for all other discrete integer frame rate doubling factors, and the invention is not limited to the examples shown here.

  As shown in FIG. 20, the video input can be a single color signal (black and white), YuV data (with or without color subsampling), or RGB data. This is the preferred video format because many displays, such as LCD panels, accept RGB video data.

  A video data frame memory is preferred for storing video data. Each video frame is written once into memory and read out at approximately twice the writing speed. Preferably, this process is performed while introducing a minimum delay, obtained by starting the first read process immediately after approximately half of the frame has been written to memory. A cache DRAM memory device can also be used to perform this function.

  The lower sideband and upper sideband are again essential parts of this embodiment of the invention. The figure suggests a linear scan line as part of the waveband, but this is only correct if the video input shows a linear light output. In the case of a bent, gammaized signal, these two modulation functions need to be bent in the same way.

  Unlike the gammaized waveband described in this embodiment, the waveband referred to here is the relationship between the drive voltage level applied to the LCD panel and the light output obtained corresponding to this voltage. Will be explained. Sometimes the term s-wave band is used to refer to LCD panel nonlinearity.

  The later purpose is to obtain an accurate average value at the output of the “lower sideband” part and the “upper sideband” part. Clearly, this type of correction is not necessary for display techniques using linear motion such as DLP projectors.

  By maintaining the correct value, for any value of the input signal, the average value of the output signal of the lower sideband and upper sideband amplitude modulators corresponding to any value of the input signal is Equal to the value of (linear motion). Or, there is a non-linear or gamma corrected output value for any value of the input signal, and the average of the output signals of the lower sideband and upper sideband amplitude modulators corresponding to any value of the input signal The value is equal to the non-linear or gamma corrected output value for any input signal.

  The multiplexer 2: 1 unit switches the two applied wavebands. The first frame of the image is displayed by the “upper sideband” while the “lower sideband” is applied to the repeated frame. The multiplexer need not be physically present in this embodiment. If “upper sideband” and “lower sideband” are functions stored in memory as reference tables, the multiplexing function modulates a certain read address bit of the reference table containing the two wavebands. By doing so, it can be executed. In this case, other read address bits can be coupled to the frame store data output while the read data is coupled to the video output. In the case of a linear function, when processing linear video data, the function can be easily executed at the basic logic port, and the multiplexing function can be executed by an additional input to the logic circuit.

  The multiplexer shown here simply describes the modulation as a function of the even / odd frame signal. The modulation is important for improving athletic performance using the present invention, as will be described in more detail later herein.

  FIG. 21 shows how the above-described method is expanded to triple the frame rate. When using frame doubling, a third modulation waveband is required to achieve the best possible motion performance. The three wave bands are indicated as “upper side band”, “intermediate wave band”, and “lower side band”, respectively. The average of these three wavebands is the original input value, although it repeats. As with the combination of the two wave bands described above, the extreme values are not affected. Video amplitude modulation processing is beneficial for intermediate tones.

  For example, when displaying an object with 20% luminance, the first field using 60% of the peak value as the “upper sideband” is applied during the first display period. During the second field, an “intermediate wave band” is applied and the luminance is 0%. The same thing happens during the third field when the “lower sideband” is applied. When one frame displays 60%, while the other two consecutive frames are black, a correct average of 20% is observed. Since the above display is only one third of the time in the hold state, it should be noted about the effect of pulsating illumination that improves exercise performance.

  Similarly, when displaying an object with 40% luminance, the first field using 100% of the peak value as the “upper sideband” is applied during the initial display period. During the second field, an “intermediate wave band” is applied and the luminance is 20%. When the “lower sideband” is applied during the third field, the brightness is 0%. When one frame displays 100%, the next frame displays 20%, and the last frame is black, a correct average of 40% is observed. Again, note the effect of pulsating illumination that improves exercise performance, as the display is only 1/3 hour in hold for 100% perfect.

  Similar observations are possible at all video levels. It is clear that the described circuit always guarantees the highest possible movement performance by minimizing the hold effect during all possible transitions.

  For example, assuming three or more n amplitude modulators, the value of the output signal of the (m−1) th amplitude modulator is m for each value of the input signal excluding extreme values. It is always lower than the value of the output signal of the second amplitude modulator. Thereby, for any given value of the input signal, the average value of the output signals of the n amplitude modulators corresponding to any given value of the input signal is equal to the value of the input signal (linear operation). equal. Or, for any given value of the input signal, there is a non-linear or gamma corrected output value, and the average value of the output signals of the n amplitude modulators corresponding to the given value of the input signal is , Equal to the non-linear or gamma corrected output value for the predetermined input signal.

  The table in FIG. 22 shows the pulsating light effect for various video component levels.

  Here again, the values in FIG. 22 are display values in the case of 8-bit linear processing. Of course, this table also varies with the actual bit depth and non-linear coding. Since the average value used by the three wave bands listed in the table of FIG. 22 always corresponds to the input level, no color is affected by this modulation in the still image.

  Only the brightest peak is unaffected by both wavebands, and therefore does not improve motion performance while transitioning between any two extreme peak values. However, as mentioned above, this constraint has little effect on any real-world image sequence. In embodiments with doubled frames, the object of the present invention continues to be close to the pulsating lighting effect as seen in interlaced CRT displays. Most images will be displayed using pulsating illumination. This removes most of the motion blur typically provided by hold-type display technologies such as LCDs.

  The higher the doubling magnification of the applied frame, the more the performance can be improved by the method and means proposed here. Doubling the frame by a factor of 3 can improve the exercise performance even more than doubling the frame. This is because when the frame is doubled, the hold time during most transitions is reduced to 33% of the frame period, compared to 50% when the frame is doubled. Quadruple frames will reduce the best possible hold time to only 25% of the frame period during most transitions.

  While the invention has been shown in detail and in the drawings and foregoing description, the drawings and description are to be regarded as illustrative or exemplary and not restrictive. is not. In other words, the present invention is not limited to the illustrated embodiment.

  Other variations of the illustrated embodiments may be understood and implemented by those skilled in the art according to the present invention by studying the drawings, publications, and claims that follow. The word “consisting of” in the claims does not exclude other elements or steps and does not exclude the indefinite article “a” or “an” from being plural. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used significantly. Any reference signs in the claims should not be construed as limiting the scope.

Claims (32)

An I / P (Interlaced to Progressive) converter,
A lower sideband amplitude modulator (6);
An upper sideband amplitude modulator (7),
The lower sideband amplitude modulator (6) and the upper sideband amplitude modulator (7) each convert an input signal into an output signal, where
The output signal of the lower sideband amplitude modulator (6) is a first function of the input signal when the input signal is less than half of the maximum input signal, or the lower sideband amplitude modulation The output signal of the device (6) is a second function of the input signal when the input signal is greater than half of the maximum input signal;
The output signal of the upper sideband amplitude modulator (7) is a second function of the input signal when the input signal is less than half of the maximum input signal, or the upper sideband amplitude modulator ( The output signal of 7) is a third function of the input signal when the input signal is greater than half of the maximum input signal.
I / P converter. For delaying and / or filtering the input signal of the lower sideband amplitude modulator (6);
Or
The apparatus according to claim 1, comprising a delay selection element for delaying and / or sorting the input signal of the upper sideband amplitude modulator (7). The input signal includes an input frame,
The input frames are respectively
A first input field corresponding to an even-numbered scan line or an odd-numbered scan line;
The apparatus according to claim 1, further comprising a second input field corresponding to an odd-numbered scan line or an even-numbered scan line. The output signal includes an output frame,
The output frames are respectively
A first output field corresponding to the first input field modulated by the upper sideband amplitude modulator (7) or the lower sideband amplitude modulator (6);
A second output field corresponding to the second output field modulated by the lower sideband amplitude modulator (6) or the upper sideband amplitude modulator (7). The apparatus according to item 1. The output signal includes a first output frame and a second output frame,
The first output frames are respectively
A first output field corresponding to a first input field of the first input frame modulated by the upper sideband amplitude modulator (7) or the lower sideband amplitude modulator (6);
A second output field corresponding to a second output field of the first input frame modulated by the lower sideband amplitude modulator (6) or the upper sideband amplitude modulator (7),
The second output frames are respectively
A first output field corresponding to a first input field of the second input frame modulated by the upper sideband amplitude modulator (7) or the lower sideband amplitude modulator (6);
A second output field corresponding to a second output field of the first input frame modulated by the lower sideband amplitude modulator (6) or the upper sideband amplitude modulator (7),
Apparatus according to any one of claims 1 to 4.   6. A crossover switch (8) for routing the output signal of the lower sideband amplitude modulator (6) and for routing the output signal of the upper sideband amplitude modulator (7). The apparatus of any one of these. An I / P converter,
n is an integer of 2 or more,
Including n amplitude modulators for converting an input signal into an output signal;
m is an integer greater than 1 and less than n,
The output signal of the mth amplitude modulator is
Input signal <maximum input signal × (m−1) / n
Is the first function of the input signal,
Input signal> Maximum input signal × (m−1) / n
And the input signal <maximum input signal × m / n
Is the second function of the input signal,
Input signal> Maximum input signal x m / n
Is the third function of the input signal,
I / P converter. The first function of the input signal is
Input signal = maximum input signal × (m−1) / n
Is equal to the second function of the input signal,
The second function of the input signal is
Input signal = maximum input signal × m / n
Is equal to the third function of the input signal,
The apparatus according to claim 7.

Where f, g and k are integers,
Each of the input signal and the output signal includes f frames,
The g th amplitude amplifier converts the g + k × n th frame,
Apparatus according to claim 7 or 8. A video data frame memory for storing a video input and outputting the input signal to the amplitude amplifier;
And / or
The apparatus according to claim 7, comprising a multiplexer that switches an output signal of the amplitude amplifier. The first function of the input signal is zero;
And / or
The second function is a linear function, a curve function, or a sigmoid function of the input signal,
And / or
A third function of the input signal is the maximum input signal;
Device according to any one of claims 7 to 10. A method of converting an interlaced input signal into a progressive output signal,
If the first output signal is generated and the input signal is less than half of the maximum input signal, the first output signal is zero, or if the input signal is greater than half of the maximum input signal, the The first output signal is a linear function, a curve function, or a sigmoid function of the input signal;
If the second output signal is generated and the input signal is less than half of the maximum input signal, the second output signal is a linear function, a curved function, or a sigmoid function of the input signal, or The second output signal is the maximum input signal if the input signal is greater than half of the maximum input signal. An apparatus for scaling an image having at least one scan line,
A lower sideband amplitude modulator (6) and an upper sideband amplitude modulator (7);
The lower sideband amplitude modulator and the upper sideband amplitude modulator each convert an input signal into an output signal,
here,
The output signal of the lower sideband amplitude modulator (6) is a first function of the input signal when the input signal is less than half of the maximum input signal, or the lower sideband amplitude modulation The output signal of the device (6) is a second function of the input signal when the input signal is greater than half of the maximum input signal;
The output signal of the upper sideband amplitude modulator (7) is a second function of the input signal when the input signal is less than half of the maximum input signal, or of the upper sideband amplitude modulator The output signal is a third function of the input signal when the input signal is greater than half of the maximum input signal;
The input signal includes an input line,
The output signals are respectively
A first output line corresponding to the input line modulated by the upper sideband amplitude modulator (7) or the lower sideband amplitude modulator (6);
An apparatus for enlarging or reducing an image, comprising: a second output line corresponding to the input line modulated by the lower sideband amplitude modulator (6) or the upper sideband amplitude modulator (7). For delaying and / or filtering the input signal of the lower sideband amplitude modulator (6);
Or
15. The apparatus according to claim 14, comprising a delay selection element for delaying and / or sorting the input signal of the upper sideband amplitude modulator (7).   16. A crossover switch (8) for routing the output signal of the lower sideband amplitude modulator (6) and for routing the output signal of the upper sideband amplitude modulator (7). The device described in 1. An apparatus for scaling an image having at least one scan line,
n is an integer of 2 or more,
Including n amplitude modulators that convert the input signal to an output signal;
m is an integer greater than 1 and less than n,
The output signal of the mth amplitude modulator is
Input signal <maximum input signal × (m−1) / n
Is the first function of the input signal,
Input signal> Maximum input signal × (m−1) / n
And the input signal <maximum input signal × m / n
Is the second function of the input signal,
Input signal> Maximum input signal x m / n
Is the third function of the input signal,
The output signal includes m output lines,
The mth output line corresponds to the input signal modulated by the mth amplitude modulator,
A device that enlarges or reduces an image. m-th output line, a time interval Delta] t _k, it is amplitude modulated by an m-th amplitude modulator according to claim 17. The first function of the input signal is
Input signal = maximum input signal × (m−1) / n
Is equal to the second function of the input signal,
The second function of the input signal is
Input signal = maximum input signal × m / n
Is equal to the third function of the input signal,
The apparatus according to claim 17 or 18.

Where f, g and k are integers,
Each of the input signal and the output signal includes f frames,
The g th amplitude amplifier converts the g + k × n th frame,
20. Apparatus according to any one of claims 17 to 19. A video data frame memory for storing a video input and outputting the input signal to the amplitude amplifier;
And / or
21. Apparatus according to any one of claims 17 to 20, comprising a multiplexer for switching the output signal of the amplitude amplifier. The first function of the input signal is zero;
And / or
The second function is a linear function, a curve function, or a sigmoid function of the input signal,
And / or
A third function of the input signal is the maximum input signal;
Device according to any one of claims 17 to 21. A method for scaling an image including at least one scan line comprising:
If a first output signal is generated and the input signal is less than half of the maximum input signal, the first output signal is zero, or if the input signal is greater than the maximum input signal, the first The output signal is a linear function, a curved function, or a sigmoid function of the input signal;
If the second output signal is generated and the input signal is less than half of the maximum input signal, the second output signal is a linear function, a curved function, or a sigmoid function of the input signal, or If the input signal is greater than the maximum input signal, the second output signal is the maximum input signal;
The input signal includes an input line,
The output signal is
A first output line corresponding to the first output signal;
A method for enlarging or reducing an image including a second output line corresponding to the second output signal. An apparatus for reducing motion blur in an image comprising at least one scan line,
A lower sideband amplitude modulator (6) and an upper sideband amplitude modulator (7);
The lower sideband amplitude modulator and the upper sideband amplitude modulator each convert the input signal into an output signal,
here,
The output signal of the lower sideband amplitude modulator (6) is a first function of the input signal when the input signal is less than half of the maximum input signal, or the lower sideband amplitude modulation The output signal of the device (6) is a second function of the input signal when the input signal is greater than half of the maximum input signal;
The output signal of the upper sideband amplitude modulator (7) is a second function of the input signal when the input signal is less than half of the maximum input signal, or the upper sideband amplitude modulator ( The output signal of 7) is a third function of the input signal when the input signal is greater than half of the maximum input signal,
The output signal includes a first output frame and a second output frame,
The first output frame is modulated by the upper sideband amplitude modulator (7) or the lower sideband amplitude modulator (6),
The second output frame is modulated by the lower sideband amplitude modulator (6) or the upper sideband amplitude modulator (7).
A device for reducing motion blur in images. For delaying and / or filtering the input signal of the lower sideband amplitude modulator (6);
Or
25. Apparatus according to claim 24, comprising a delay screening element for delaying and / or screening the input signal of the upper sideband amplitude modulator (7). The input signal includes an input frame,
The input frames are respectively
A first input field corresponding to an even-numbered scan line or an odd-numbered scan line;
26. The apparatus according to claim 24 or 25, comprising an odd numbered scan line or a second input field corresponding to an even numbered scan line.   27. A crossover switch (8) for routing the output signal of the lower sideband amplitude modulator (6) and for routing the output signal of the upper sideband amplitude modulator (7). The apparatus of any one of these. A device for reducing motion blur in an image,
n is an integer of 2 or more,
Including n amplitude modulators that convert the input signal to an output signal;
m is an integer greater than 1 and less than n,
The output signal of the mth amplitude modulator is
Input signal <maximum input signal × (m−1) / n
Is the first function of the input signal,
Input signal> Maximum input signal × (m−1) / n
And the input signal <maximum input signal × m / n
Is the second function of the input signal,
Input signal> Maximum input signal x m / n
Is the third function of the input signal,
The input signal includes an input line,
The output signal includes m subsequent output lines,
The subsequent m th output line corresponds to the input signal modulated by the m th amplitude modulator,
A device for reducing motion blur in images. The first function of the input signal is
Input signal = maximum input signal × (m−1) / n
Is equal to the second function of the input signal,
The second function of the input signal is
Input signal = maximum input signal × m / n
Is equal to the third function of the input signal,
30. The apparatus of claim 28.

Where f, g and k are integers,
Each of the input signal and the output signal includes f frames,
The g th amplitude amplifier converts the g + k × n th frame,
30. Apparatus according to claim 28 or 29. A video data frame memory for storing a video input and outputting the input signal to the amplitude amplifier;
And / or
31. Apparatus according to any one of claims 28 to 30, comprising a multiplexer for switching the output signal of the amplitude amplifier. The first function of the input signal is zero;
And / or
The second function is a linear function, a curve function, or a sigmoid function of the input signal,
And / or
A third function of the input signal is the maximum input signal;
32. Apparatus according to any one of claims 28 to 31. A method of converting an interlaced input signal into a progressive output signal,
If the first output signal is generated and the input signal is less than half of the maximum input signal, the first output signal is zero, or if the input signal is greater than half of the maximum input signal, the The first output signal is a linear function, a curve function, or a sigmoid function of the input signal;
If the second output signal is generated and the input signal is less than half of the maximum input signal, the second output signal is a linear function, a curved function, or a sigmoid function of the input signal, or If the input signal is greater than half of the maximum input signal, the second output signal is the maximum input signal, wherein:
The output signal includes a first output frame and a second output frame,
The first output frame corresponds to the first output signal,
The second output frame corresponds to the second output signal;
A method of converting an interlaced input signal into a progressive output signal.

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