Abstract: A method for motion vector de-interlacing decodes macro blocks in a picture, calculates motion vectors of the each MB, produces de-interlacing flag according to the threshold, realizes a Temporal Extension action and performs a Devour action. The Temporal Extension action checks multiple flag buffers, determines if a de-interlace flag should be set as WEAVE or BOB2 based on whether there exists a predetermined number of BOB flags in those flag buffers The Devour action determines if the de-interlace flag is BOB. If positive, it calculates the amount of BOB data within a predetermined area around the current MB, determines if the result is smaller than the BOB threshold and sets the de-interlace flag as WEAVE. Otherwise, it calculates the amount of the WEAVE data, determines if the result is smaller than the WEAVE threshold and sets the de-interlace flag as BOB2.

Abstract: A method of interpolating a given output pixel value when upconverting interlaced video to progressive video includes the step of determining averages for vertically adjacent pixels, left diagonally adjacent pixels, and right diagonally adjacent pixels respectively for the given output pixel and the step of determining differences between the vertically adjacent pixels, the left diagonally adjacent pixels, and the right diagonally adjacent pixels respectively. The method further selects as an interpolated value for the given output pixel among the averages based on a minimal difference of an absolute value among the differences respectively and further constrains the interpolated value to the value of the average of the vertically adjacent pixels if a value of the given output pixel is not between a range of values defined by adjacent pixels above and below the given output pixel or if the selected minimal difference is not unique.

Abstract: A three-dimensional de-interlacing method and apparatus for converting an interlaced scan format image into a progressive scan format image by performing low pass filtering on respective predetermined pixels of a current frame and a previous frame and determining pixel motion index values by comparing a threshold value to a difference value between the respective filtered pixels in a current field in one of the current and previous frames and corresponding respective filtered pixels in preceding and succeeding fields to the current field and in the current and previous frames. A motion mode of a pixel is determined based upon the determined motion index values of temporally and spatially adjacent pixels to the pixel. A spatial interpolation or temporal interpolation on the subjected pixel is selected depending on the determined motion mode.

Abstract: There is provided an image processing method capable of improving the picture quality. The image processing method comprises: incorporating input frame pictures to be displayed on a display device, on the basis of an input picture signal and an input synchronizing signal which is synchronized with the input picture signal; recording the incorporated input frame pictures in an input frame memory; and producing output frame pictures from input frame pictures, which have been recorded in the input frame memory, by producing an interpolated picture or inserting a black raster picture or thinning out the frame pictures, between input frame pictures corresponding to a picture information of the input frame picture to be displayed, on the basis of the picture information and the input synchronizing signal and an output synchronizing signal.

Abstract: This specification discloses a method that uses three-dimensional image interpolation algorithm implemented in an image player to solve the problem of frame rate conversions between output contents and the image player. It aims to achieve high resolutions and high frame rates. The disclosed method adjusts the frame resolution and frame rate of the received image data according to the playing format of the image player. That is, the pixel values contained in a frame are interpolated to generate several interpolated pixel values in order to fit with the frame resolution. The interpolated frame is then stored. The next two consecutive frames are further extracted. The central position is determined according to the frame playing frequency. The corresponding pixel values of the two consecutive frames are used to produce several interpolated pixel values. The interpolated pixel values form an interpolated frame, which is then saved.

Abstract: A motion decision value provides a dependable estimate whether motion occurs in a given region of a video image in an interlaced video sequence. The motion detection is particularly applicable in the conversion from interlaced video to progressive video. An input first is fed to an absolute value former which computes a frame difference signal from a difference between the first field and the second field in one frame. A point-wise motion detection in the frame difference signal is then followed by a region-wise motion detection that combines the point-wise motion detection signal with an adjacent point-wise motion detection signal delayed by one field. The motion decision value is then computed from the region-wise motion detection signal and output for further processing in the video signal processing system, such as for choosing whether the spatially interpolated video signal value or the temporally interpolated video signal value should be used for the output.

Abstract: A method for deinterlacing a video signal is disclosed. Frame differences are calculated, a scene change threshold is determined based on the frame differences, a scene change is detected based on the frame differences and the scene change threshold, a stationary motion threshold is determined based on the frame differences, stationary motion is detected based on the frame differences and the stationary motion threshold, a mode of the video signal is detected based on the frame differences, and a deinterlacing algorithm is selected based on the mode of the video signal, the scene change, and the stationary motion.

Abstract: Aspects of the invention for converting interlace formatted video to progressive scan video, may include a color edge detector block (306) adapted to determined edges in interlaced formatted video. A threshold and gain processor block (308) coupled to the color edge detector block (306) may be adapted to quantify a likelihood of motion for each pixel comprising at least a portion of the interlaced scanned video using a motion value. A binder block (310) coupled to the threshold and gain processor block (308) may be configured to combine the motion value for each component of a luminance and chrominance of each of the pixels. A resampler block (314) may be coupled to the binder to determine an actual pixel value. The resampler block (314) may include at least one of a vertical and a horizontal filter adapted to determine an actual value of each of the pixels in at least a portion of the interlaced scanned video.

Abstract: A film mode detecting apparatus and method for detecting a film mode by using a periodicity of motion vectors having high autocorrelativity. A motion vector calculating unit adds a size of motion vectors with respect to each field, thereby outputting a first computing value. A peak value eliminating unit detects a peak value from the first computing value, and if the peak value is detected, eliminates the peak value from the first computing value and outputs a resultant value. A mode detecting unit compares an autocorrelation coefficient with a predetermined threshold, thereby outputting a film mode detection signal. The autocorrelation coefficient is obtained from an input signal inputted from the peak value eliminating unit and a delayed signal delayed from the input signal. A mode determining unit determines a film mode when the film mode detection signal is input as often as, or more often than, a first reference value.

Abstract: An image-coding format converting apparatus comprising an EMPEG2 image decoder 30, a resolution/frame rate converter 31, a motion vector converter 32, and an MPEG4 encoder 33. The EMPEG2 decoder 30 decodes a bit stream of EMPEG2 image codes, generating an image signal. The resolution/frame rate converter 31 converts the image signal. The MPEG4 encoder 33 encodes the output of the resolution/frame rate converter 31, generating a bit stream of MPEG4 image codes. In the resolution/frame rate converter 31, pixels are added or extracted in accordance with the start position of a macro block, thus adjusting the input image signal to one than can easily be encoded to MPEG4 image codes. The motion vector converter 32 generates an MPEG4 motion vector from parameters such as an MPEG2 motion vector. The MPEG4 encoder 33 uses the MPEG4 motion vector to encode the output of the resolution/frame rate converter 31.

Abstract: A format converter which performs frame rate conversion and de-interlacing using a bi-directional motion vector and a method thereof are provided. The method includes the steps of (a) estimating a bi-directional motion vector between the current frame and the previous frame from a frame to be interpolated; setting the motion vector of a neighboring block that has the minimum error distortion, among motion vectors estimated in step (a), as the motion vector of the current block; and (c) forming a frame to be interpolated with the motion vector set in step (b).

Abstract: Methods and systems of the present invention automatically and differentially detect and correct linear motion artifacts caused by camera movement and regional subject motion artifacts. Regional subject motion artifacts may be caused, for example in endoscopic or other surgery, by movement of surgical tools or the patient within the image field. Methods and systems of the present invention automatically correct for both types of motion occurring simultaneously. After an image is automatically corrected for both camera motion and regional subject motion, the image is displayed for viewing.

Abstract: There is provided an image processing method capable of improving the picture quality. The image processing method comprises: incorporating input frame pictures to be displayed on a display device, on the basis of an input picture signal and an input synchronizing signal which is synchronized with the input picture signal; recording the incorporated input frame pictures in an input frame memory; and producing output frame pictures from input frame pictures, which have been recorded in the input frame memory, by producing an interpolated picture or inserting a black raster picture or thinning out the frame pictures, between input frame pictures corresponding to a picture information of the input frame picture to be displayed, on the basis of the picture information and the input synchronizing signal and an output synchronizing signal.

Abstract: A motion decision value provides a dependable estimate whether motion occurs in a given region of a video image in an interlaced video sequence. The motion detection is particularly applicable in the conversion from interlaced video to progressive video. An input first is fed to an absolute value former which computes a frame difference signal from a difference between the first field and the second field in one frame. A point-wise motion detection in the frame difference signal is then followed by a region-wise motion detection that combines the point-wise motion detection signal with an adjacent point-wise motion detection signal delayed by one field. The motion decision value is then computed from the region-wise motion detection signal and output for further processing in the video signal processing system, such as for choosing whether the spatially interpolated video signal value or the temporally interpolated video signal value should be used for the output.

Abstract: A system and method for generating an interpolated pixel at a vertical position in a field of a video frame. The method comprises the steps of receiving at least two pixels vertically adjacent the vertical position in the field and at least three pixels from at least one adjacent field, detecting a degree of motion in the vicinity of the interpolated pixel, providing weighting factors based on the degree of motion, and calculating the interpolated pixel based on a combination of weighted contributions from the at least two pixels and the at least three pixels. The weighted contributions are derived from a combination of the weighting factors and at least vertical-temporal and temporal interpolation.

Abstract: The image processing apparatus of this invention is so constructed as to enter the image signal of which one frame is composed of plural interlaced fields each of which is divided into plural blocks each consisting of plural pixels, to interpolate the image signal of a second field utilizing the image signal of a first field in the image signal outputted in the unit of the above mentioned block, and to output the image signal in the unit of the above-mentioned block.

Abstract: Portions that identify motion are identified in an original frame of interlaced video fields. A de-interlaced version of the frame is generated. The original frame and the de-interlaced frame are combined to form a resulting frame, the resulting frame including portions from the original frame that represent relatively less motion and portions from the de-interlaced version that represent relatively more motion.

Abstract: A system, method, and apparatus for guiding a deinterlacer are presented herein. The deinterlacer is provided a deinterlacing coefficient which the deinterlacer uses to select a deinterlacing scheme which best utilizes system resources. The deinterlacing coefficient is calculated based on the various attributes associated with a macroblock of an interlaced field, such as motion vectors. Because the attributes are calculated and encoded prior to transmission of the macroblock over a communication channel, generation of the deinterlacing coefficient does not require significant additional computation resources.

Abstract: Deinterlacing is applied to a composite video image that includes alternating even and odd rows of pixels. The even rows form a first image; the odd rows, a second image; these are recorded at different times, introducing a possibility of motion artifact. A first average horizontal intensity difference is computed between the first image and the second image. The first image is offset by one pixel in each horizontal direction to form a horizontally offset image, and another average horizontal intensity difference is computed. A minimum average intensity difference is determined from a comparison of the average horizontal intensity differences. The first image is shifted in a horizontal direction determined to achieve the minimum average horizontal intensity difference, and the horizontally shifted first image is combined with the second image to form an improved composite image. An analogous series of steps is carried out in a vertical direction.

Abstract: An apparatus, method, and computer-readable medium for selectively performing, in parallel structures, different functions on an input image, sound data or other correlated data. An input is configured to receive the input data. There are at least two circuits, each circuit is coupled to the input and each circuit is configured to perform a different function on the input data. A motion-detection circuit is coupled to the input and each of the at least two circuits. The motion-detection circuit is configured to determine a level of change in the input data and generate an output of motion data. The motion data is used by each of the at least two circuits to perform its corresponding function. A select device is coupled to each of the at least two circuits and a control input. The select device is configured to select as output data, the output of one of the at least two circuits based upon the control input.

Abstract: A method and apparatus for video motion compensation, power of two reduction and color format conversion is disclosed. The motion compensation engine performs the MPEG-2 functions of half pel compensation, inverse discrete cosine transform and merge. Dual prime, field-based and frame-based macroblocks are supported. Data reduction may be performed in the vertical direction, the horizontal direction, or both.

Abstract: Progressive-scan video signals that are generated from interlaced-scan video signals by interpolation may be subject to temporal distortion when the interstitial interpolated lines have a different time reference than the interlaced lines. This distortion may be mitigated by detecting vertical low-frequency spatial distortion in an interpolated video signal and by generating a compensating signal that, when added to the interpolated video signal reduces that vertical low-frequency spatial distortion. A spatial low-pass filter is applied to corresponding pixels of several adjacent lines of the current field of the original interlaced image. Concurrently, a spatial low-pass filter is applied to corresponding pixels of several interpolated lines that are inserted between the lines of the interlaced image to produce the progressive image. At each pixel position, the low-pass filtered values are compared.

Abstract: A three-dimensional signal processor for performing three-dimensional signal processing such as dual scanning/horizontal frequency conversion of a digital broadcasting signal, using a motion vector included in a decoded signal such that a special motion detecting block is not required. In this processor, three-dimensional signal processing is performed using motion information extracted during decoding, without using a special motion detection memory, thus reducing the manufacturing costs and providing accurate motion information from a transmitter. Therefore, the degradation of image quality can be prevented.

Abstract: A high resolution, multi-tile video display system is described. The universal display system can effectively produce high-resolution images from data received from both analog devices and digital devices such as televisions, personal digital assistants, and computer systems. Generally, the video display system includes a computer system that receives data from several digital data sources. The computer system generates numerous video signals after processing the data. An interface circuit generates display signals after processing the video signals. The display signals correspond to a fractional portion of the high-resolution image. Several displays receive the display signals. After processing the display signals, the displays jointly produce the high-resolution image.

Abstract: In one embodiment, a video encoder having a first and second phase of motion estimation, and scene change and 3:2 pull-down detection components is provided. In another embodiment, the first phase of motion estimation determines a set of field motion vectors to execute the scene change and 3:2 pull-down detection components. In another embodiment, the scene change and 3:2 pull-down detection component, and the second phase of the motion estimation occur after the first phase of motion estimation.

Abstract: The invention relates to an interlaced to progressive conversion method and system by use of an interpolation algorithm (IPC algorithm) which is scaleable with several levels or modes with an increasing computational complexity depending on increasing availability of resources, i.e. computation power, available memory and available memory bandwidth. An IPC mode control can be implemented as a decision table. Peferably, at least five levels of the algorithm can be scaled beginning with line repetition (lowest level), linear interpolation (lower level), median inter-field computation with a three-tap or a five-tap median operator (medium level) and a combination of a linear interpolator and a median interpolator, eventually in combination with edge detection (higher levels of the scaleable algorithm).

Abstract: Interpolation of a new frame between a previous frame and a current frame of a video stream by motion compensated frame rate upsampling. The interpolation method includes identifying nodes and edges of objects such as triangles present in the previous frame, constructing a superimposed triangular mesh based on the identified nodes and edges, estimating displacement such nodes in the superimposed triangular mesh from the previous frame with respect to the current frame, and rendering the new frame based on the estimated displacement of nodes. Additionally, pixels of the previous frame and the current frame may be classified according to whether a pixel's value has changed from the previous frame to the current frame. This classification may be used during rendering to reduce overall processing time. Pixel-based forward motion estimation may be used to estimate motion of pixels between the previous frame and the current frame and the estimated motion may be used in estimating node displacement.

Abstract: Apparatus and methods relating to a motion adaptive median filter. In an embodiment of the present invention, a motion adaptive median filter includes a motion detect circuit, a soft switch, and a median filter. The motion detect circuit can have an output. The soft switch can have a first input and an output, and the first input of the soft switch can be coupled to the output of the motion detect circuit. The median filter can have a first input, and the first input of the median filter can be coupled to the output of the soft switch.

Abstract: A method and apparatus is disclosed for converting an interlaced television display to a progressive, scan, or non-interlaced display where artifacts are removed if the source of the signal is from a movie film to television converter, a video recording of a movie, a live camera, or a camera output captured on a video recording system, or any sequence of the above, by utilizing three motion detection stages.

Abstract: The invention provides a method for filtering motion effects from a de-interlaced image and an apparatus associated therewith. The method assumes that the de-interlaced image is formed by a combination of a first interlaced image and a second interlaced image. A first step in the method is to interpolate an interpolated line between two lines in a region of the first interlaced image. A variance value is then determined between the interpolated line and a corresponding line in a corresponding region of the second interlaced image. A threshold value will have been predetermined in the system and the variance value is compared against that threshold value. If the variance value is less than the threshold value then the correlation is strong and the corresponding line is displayed in the de-interlaced image. Otherwise if the variance value exceeds the threshold value then the interpolated line is displayed. This process is repeated for each pixel until the entire image is displayed.

Abstract: A system processes an image containing a first line and a second line, where the first and second lines includes a plurality of pixels, to generate an interpolated line. The system selects a first and second set of pixels from the lines and generates a first set and second set of filtered values. The system identifies in the first line an edge location in the first set of the filtered values by a first filtered value of the first set of filtered values being at least one of less than and equal to a first predetermined value and a second filtered value of the fist set of the filtered values being at least one of greater than and equal to the first predetermined value.

Abstract: Method and apparatus are disclosed for receiving an interlaced color video signal, and processing the signal to produce a progressively scanned video signal. An embodiment of the method of the invention includes the following steps: scan converting, by field combining and high pass filtering, the luminance component of the received signal, to obtain a progressively scanned high pass luminance component; deriving, from the luminance component of the received signal, a low pass luminance component; scan converting, by line rate conversion, to progressively scanned format, the chrominance components of the received signal and the low pass luminance component; and combining the progressively scanned low and high pass luminance components.

Abstract: A method and system for combining the information from one video field, or multiple video fields in a single, high quality still image. A reference field and auxiliary fields are selected and an orientation map is constructed for the reference field. Motion maps are constructed to model displacement between the reference and auxiliary fields. The auxiliary fields are directionally interpolated using orientation maps. A merge mask is used to mask of certain pixels which should not be used in the final enhanced image. A weighted average is then formed from the reference field pixels which have not been masked off. A final still image is obtained after additional horizontal interpolation. Post-processing might be used to further sharpen the image. The method and system are applicable to both the luminance and chrominance components of the video image.

Abstract: A delay register section 31 holds SD pixels of a luminance signal and a classification section 33 decides a class, reads a coefficient corresponding to the decision result from a coefficient RAM section 40, and outputs the coefficient to a product-sum section 38. The product-sum section 38 captures the pixel data for 17 taps from the delay register section 31, converts the pixel data into seven taps, and outputs them to the product-sum section 38. The product-sum section 38 performs the product-sum operation of pixel data and coefficients and outputs the operation result as HD pixels. An interpolation pixel operation section 42 applies a simple interpolation processing different from the case of a luminance signal to the pixel data of a color signal component to generate HD pixels of a color signal. Thus, downsizing and cost reducing can be realized.

Abstract: Video sources from a progressively scanned camera are processed so as to simulate a video source derived from motion picture film. The simulated film source video creates a distinctive "pseudo-film pattern," in which at least some of every SDTV video field has no motion or low motion with respect to corresponding picture areas of the SDTV video field paired with it (occasional rare camera-originated scenes result in a field in which the entire picture has high motion, breaking the pseudo-film pattern). Corresponding picture areas within the pairs of fields having no motion or low motion are merged, in the manner in which interlaced fields derived from the same motion picture frame are merged. Corresponding picture areas within the pairs of fields having high motion are subject to interlace-to-progressive scan conversion processing which is not purely a merger of fields.

Abstract: A video signal is both spatially and temporally filtered. The output video signal is temporally noise reduced in portions of the image which exhibits little or no motion, and is spatially noise reduced in portions where motion exists. This approach is particularly applicable to reducing film grain noise in video material that originates from images on photographic films, since film grain noise is more correlated spatially than temporally.

Abstract: A resolution conversion apparatus for a display device which converts input image signals to image signals having different resolution is provided. The resolution conversion apparatus for a display device can increase or decrease the number of scanning lines by using interpolation function to prevent the non-linear distortion due to the nonuniform insertion of scanning lines. The resolution conversion apparatus for a display device can also vary the interpolation function according to the frequency of image information to compensate the decrease of sharpness resulting from the conventional interpolation method using simple proportional values.

Abstract: A discriminator is provided in a driving system for a plasma display panel so as to discriminate whether an input video signal is a moving picture signal or a still picture signal, and an A/D converter is provided for sampling the video signal for producing a pixel data having n-bit. The pixel data is converted into a false contour correcting pixel data having a (n+m)-bit based on a correcting pixel data derived from a table. A controller selects the false contour correcting pixel data when the input video signal is a moving picture signal, and selects the pixel data from the A/D converter when a still picture signal. The plasma display panel is driven by a pixel data determined by the controller.

Abstract: A process for converting interlaced frames into progressive frames comprising a change of frame frequency by interpolation and motion compensation, wherein when a motion vector associated with a pixel to be interpolated is non-zero or when the motion vector is zero but the confidence accorded to this vector is less than a given threshold, the interpolation of the pixel of a frame situated temporally between two input frames is carried out by a median filtering pertaining to the values obtained by a first motion compensated linear temporal filter, a second motion compensated linear filter, and a motion compensated median temporal filter.

Abstract: A method of accurately detecting rapid motion as well as slow motion using two field memories in an interlaced-progressive scanning converter for changing an interlaced-scanned signal into a progressive-scanned signal. A threshold coefficient, which is used for comparison to a difference between temporal interpolation and spatial interpolation values to determine whether a picture is in motion, is determined dynamically in the disclosed method, rather than being a fixed, predetermined value. The threshold coefficient is determined based upon a degree of correlation between data of pixels above and below a pixel to be interpolated. Detection of whether the picture is stationary is based upon the difference between the data of pixels above and below the pixel to be interpolated is greater than a stationary coefficient. The threshold coefficient is maintained as being no less than the value of the stationary coefficient.

Abstract: A scan converter converts horizontal and vertical synchronizing signals and digital R, G, and B signals fed from a computer into a television signal through digital processing that is performed by an encoder at a rate of 4.times.fsc (where fsc represents the frequency of the chrominance subcarrier of the television signal). The scan converter has a line memory which temporarily stores the digital signals from the computer to supply the digital signals to the encoder at the rate of 4.times.fsc.

Abstract: Apparatus and method for producing an output non-interlaced, progressive video component signal from an input interlaced video signal by mixing lines of the interlaced video component signal with lines of a calculated signal. A preferred embodiment adaptively combines three interpolation techniques. They include a steered spatio-temporal interpolation for moving edges, a vertical interpolation for vertically moving horizontal lines and a temporal interpolation for local still picture parts. Robust detectors associated respectively with the above interpolations are also provided. The edge direction detector is composed of subband filters, five oriented differentiators and logical filters for reliable direction decision making. The vertical motion detector for horizontal edges introduced for reducing the horizontal line flicker is composed of temporally directional differentiators working on lowpass filtered signal, a decision device and logical filters.

Abstract: A picture signal processing device for processing picture signals for displaying e.g., an enlarged picture, a contracted picture or a still picture. The picture signal processing device includes a motion detection unit for comparing the picture signal level of a pixel under detection in a first field or a second field together making up a frame, the picture signal levels of pixels lying close to the pixel under detection and the value of a variably set motion detection coefficient to one another for detecting the possible presence of motion in the picture of the pixel under detection. The first field is formed by every two scanning lines and the second field is formed by the remaining scanning lines.

Abstract: In a video processing system (14), a method of detecting and compensating for motion of an image which includes the steps of: detecting a first pixel value, a second pixel value, and a third pixel value, the first pixel value of a first scan line in a first field, the second pixel value of a second scan line in the first field, and the third pixel value in a second field; providing a motion indicator based on the first, second, and third pixel values; selecting a plurality of interpolation coefficients from a memory based on the motion indicator signal; and providing an interpolated color space pixel based on a first color space pixel associated with the first pixel value, a second color space pixel associated with the second pixel value, and based on the plurality of interpolation coefficients.

Abstract: A received 4-2-0 format, 2-1 interlaced digital component video signal is upconverted to a 4-2-2 format, 2-1 interlaced digital component video signal and a vertical chrominance bandwidth expansion enhancement signal is combined with the chrominance components in order to more closely simulate the wider bandwidth vertical chrominance resolution of the original 4:2:2 format signal from which the 4:2:0 format signal was derived. In a first embodiment, the vertical chrominance enhancement signal is derived from vertical transitions in the luminance component of the 4:2:0 format signal. In a second embodiment, the vertical chrominance enhancement signal is derived from vertical transitions in the luminance component of the 4:2:0 format signal when such vertical transitions are present and, in the absence of a luminance transition, the vertical chrominance enhancement signal is derived from the sampling-rate-reduced chrominance components of the 4:2:0 format signal.

Abstract: A method of motion-compensated interpolation of a picture signal (Pi) having input fields, comprises the steps of providing (ME) motion vectors (D) between a first and a second input field of the picture signal (Pi), and providing (MC1, OC) an interpolated field (Po) on the basis of at least one input field in dependence upon the motion vectors (D). At least one further motion vector (Dmax) is furnished (C2) in addition to each provided motion vector (D), whereby the interpolated field (Po) is furnished (MC1, MC2, OC) in dependence upon both the first-mentioned motion vectors (D) and the further motion vectors (Dmax).

Abstract: In order to reduce the number of field memories for a converting apparatus for non-interlaced scanning three field memories 53 to 55, a Y/C separator and a motion detector are arranged on the converting apparatus. Based on a luminance signal and a color signal which are generated by the Y/C separator, three luminance signals and color differential signals are generated for a sample (base) line and a complemented line. The three luminance signals and color differential signals are selected based on a detected result of the motion detector. When the selection is carried out, the luminance signal and the color difference signal for a motion pixel are set to the luminance signal and the color difference signal which are generated based on the newest image signal.

Abstract: An image resolution conversion method converting an image of a first resolution represented by multivalued digital data into an image of a second resolution by interpolation, comprises the steps of assigning a block defined by a plurality of pre-conversion pixels of the first resolution image to each post-conversion pixel, performing edge detection in the block based on data for each pixel of the block, and performing resolution conversion by a first interpolation method when at least the result of the edge detection satisfies predetermined conditions, and performing resolution conversion by a second interpolation method when the result of the edge detection does not satisfy the predetermined conditions.

Abstract: A line generator (31) for receiving fields of pixel data sampled from a video input signal and for generating additional lines of pixel data so that the display frames will have more lines than the fields. The line generator (31) has a motion detector (31a) that determines, on a pixel by pixel basis, whether some part of the current field is in motion. A motion signal from the motion detector (31a) is used to select between outputs of two or more pixel generators (31b, 31c). One of the pixel generators (31b) provides pixel values that are better suited for display when the image is not in motion. The other pixel generator (31c) provides pixel values that are better suited for display when the image is in motion.

Abstract: A first pixel of a given field is compared with second and third vertically aligned pixels of corresponding horizontal position of an adjacent field to produce, for each first pixel, a pixel difference signal having a value of zero if the value of the first pixel is intermediate the values of the second and third pixels, the difference signal otherwise having a value equal to the absolute value of a difference between the value of the first pixel and the value of one of the second and third pixels having a value closest to that of first pixel. The pixel difference signals are accumulated over a predetermined portion of one field period of the video signal to provide a field difference signal which is analyzed by a group of five correlators for patterns characteristic of 2-2 pull-down or 3-2 pull-down film mode sources. Flags are produced for identifying film mode operation and for identifying which of the adjacent fields to use in subsequent video processing such as de-interlacing or flicker reduction.