Abstract: A method for converting an interlaced scan image, having a plurality of pixels arranged in a matrix of rows and columns, to a progressive scan image processes interpolated picture elements (pixels) at target pixel positions between two successive rows of the interlaced scan image. The method determines if a pixel on a current row is an edge pixel and if the pixel is an edge pixel, it determines an approximate angle for the edge based on a difference between the column number of at least the edge pixels on the current row and the column number of at least one edge pixel on a previous row. The method uses the angle to determine which pixel on the current row and previous row correspond to the target pixel and interpolates the value of the target pixel from the corresponding pixels.

Abstract: In the scanning conversion apparatus, a first converter converts input interlaced scan data into progressive scan data, and a second converter converting the progressive scan data output from the first converter to interlaced scan data.

Abstract: A method for deinterlacing a picture is disclosed. The method generally includes the steps of (A) generating a plurality of primary scores by searching along a plurality of primary angles for an edge in the picture proximate a location interlaced with a field of the picture, (B) generating a plurality of neighbor scores by searching for the edge along a plurality of neighbor angles proximate a particular angle of the primary angles corresponding to a particular score of the primary scores having a best value and (C) identifying a best score from a group of scores consisting of the particular score and the neighbor scores to generate an interpolated sample at the location.

Abstract: A method includes storing a current field of a digital video signal. The method further includes storing a preceding field that immediately precedes the current field in the digital video signal, and storing a succeeding field that immediately succeeds the current field in the digital video signal. The method also includes examining the preceding and succeeding fields for motion at a locus of a current pixel to be interpolated. In addition, if any motion at the locus is less than a threshold, the preceding and succeeding fields are examined for motion at a respective locus of at least one pixel that is adjacent to the current pixel to be interpolated.

Abstract: Interlaced video upconverted to progressive video has improved diagonal enhancement. A plurality of averages and differences are determined from different pixels near a given output pixel, including: a vertical average, first and second left diagonal averages, first and second right diagonal averages, a vertical difference, first and second left diagonal differences, and first and second right diagonal differences. A selection is made among the averages based on an absolute value of a minimal difference among the differences. The selection is constrained to select the vertical average if the differences among the averages are ambiguous, that is, when a value for the given output pixel is not within a range of values defined by pixels vertically adjacent to the given output pixel or when a minimal difference among the respective differences is not unique.

Abstract: A de-interlacing method is applied to a to-be-de-interlaced field including display pixels of display lines and to-be-interpolated pixels of to-be-interpolated lines. First, a corresponding edge-direction value of each of edge pixels in the to-be-de-interlaced field is determined. Next, it is judged whether one of the display pixels near each to-be-interpolated pixel has a corresponding edge-direction value so that a judgement result is obtained. Then, a corresponding edge-direction value of each to-be-interpolated pixel is set according to the corresponding edge-direction values of specific display pixels of the display pixels near the to-be-interpolated pixel if the judgement result is affirmative. Finally, a corresponding display pixel pair of up and down display lines near each to-be-interpolated pixel is selected according to the corresponding edge-direction value of each to-be-interpolated pixel so that a luminance value and a chrominance value of the to-be-interpolated pixel are calculated.

Abstract: A system and method that produces a spatial average for interlaced video in a deinterlacer. The system detects edges in the video images and determines the angle at which the edges are oriented based on the gradient in the x-direction and the gradient in the y-direction. The direction of the edge is determined using the angle information of the edge. The system may also determine the strength of the edge. Based on the determined characteristics of the edge a filter may be selected to produce a spatial average of the edge in the image.

Abstract: A method for de-interlacing an interlaced video signal includes generating a per-field motion pattern set for a subject video field, where the motion pattern set comprises a same-parity motion pattern and an opposite-parity motion pattern pair, providing a plurality of progressive mode pattern pairs, where each progressive mode pattern pair is unique and characteristic of one of a plurality of progressive frame-to-interlaced field conversion techniques, and comparing the same-parity and opposite-parity motion pattern pair for the subject video field with each progressive mode pattern pair to determine whether the subject video field is derived from a progressive source and to identify the progressive frame-to-interlaced field conversion technique used. Based on the comparison, a field-merging de-interlacing technique or a per-pixel de-interlacing technique is utilized to de-interlace the subject field to produce a progressive video signal.

Abstract: A video de-interlace apparatus and a method thereof are disclosed. The apparatus includes a combing detection apparatus and a de-interlace format determining apparatus. The combing detection apparatus receives a plurality of successive fields, performs combing detection to the fields, and outputs a combing detection result. The de-interlace format determining apparatus receives the combing detection result and compares the combing detection result with a plurality of models. When the combing detection result is conform to a specific model among the models, the de-interlace format determining apparatus determines a specific de-interlace format corresponding to the specific model to de-interlace the foregoing fields.

Abstract: The present invention provides de-interlacing methods and related apparatuses. One of the proposed de-interlacing methods includes edge detection of a target region corresponding to a target position. When the target region is assumed to include an edge that is considered stationary, and if the target position is on a stationary side of the edge, then a pixel value for the target position is generated by inter-field interpolation.

Abstract: A method for deinterlacing a picture is disclosed. The method generally includes the steps of (A) determining a protection condition by performing a static check on the picture in a region around a location interlaced with a first field of the picture, (B) calculating an interpolated sample at the location by temporal averaging the first field with a second field in response to the protection condition indicating significant vertical activity and (C) calculating the interpolated sample at the location by spatial filtering the first field in response to the protection condition indicating insignificant vertical activity.

Abstract: Film mode detection with bad edit detection used in de-interlacing video includes use of combing artifact detection in both 3-2 pull down detection and 2-2 pull down detection. Further, combing artifact detection uses only two field memories by accumulation of partial field statistics for comparisons.

Abstract: In a scan conversion apparatus, a first interpolation pixel generation unit generates an interpolation pixel of a nonexistent line for one of images of two fields based on a motion vector detected between the images of the same parity. A second interpolation pixel generation unit generates an intra-field interpolation pixel of a nonexistent line by using a pixel for the image of the field for which the interpolation pixel has been generated by the first interpolation pixel generation unit, among the images of the two fields. An erroneous-interpolation detection unit detects an erroneous interpolation for the interpolation pixel generated by the first interpolation pixel generation unit by comparing with pixels existing in the upper and lower lines. A signal blending output unit outputs a video signal using interpolation pixels generated by the first and second interpolation pixel generation units based on the detection by the erroneous-interpolation detection unit.

Abstract: Film mode detection with bad edit detection used in de-interlacing video includes use of combing artifact detection in both 3-2 pull down detection and 2-2 pull down detection. Further, combing artifact detection uses only two field memories by accumulation of partial field statistics for comparisons.

Abstract: Transcoding as from MPEG-2 SDTV to MPEG-4 CIF reuses motion vectors and downsamples in the frequency (DCT) domain with differing treatments of frame-DCT and field-DCT blocks, and alternatively uses de-interlacing IDCT with respect to the row dimension plus deferred column downsampling for reference frame blocks.

Abstract: The present invention provides a method and apparatus for de-interlacing video data by using a horizontal motion vector of a horizontal motion between fields. The horizontal motion regarding a target pixel of a frame is compensated if the horizontal motion vector is found to be substantially not null according to the pixels residing in the fields determined by the horizontal motion vector. This results in an upgraded quality of image after the de-interlacing process.

Abstract: An apparatus and method for deinterlacing video images with improved slope detection is described. In one exemplary implementation, the apparatus includes an input buffer, a processor, and an output buffer. The input buffer is configured to receive a video stream in an interlaced format. The processor is configured to convert the video stream from the interlaced format to a progressive format. This conversion process includes calculating the slope for a diagonal line of an image at a pixel to-be-interpolated (i.e., at a missing pixel) using a slope protection operation to increase the accuracy of the slope calculation. The output buffer is then configured to transmit the video stream in the progressive format.

Abstract: The present invention relates, in general, to an apparatus and method for converting interlaced field image data into progressive image data in image processing techniques and, more particularly, to an apparatus and method for performing intra-field interpolation for a de-interlacer, which calculates a direction in which pixel values are changed using the variations and correlations between the pixel values of the regions on two lines in one field, and outputs an interpolated value depending on the direction, thus enabling a field to be interpolated in the change direction.

Abstract: A method and apparatus are provided for deriving a progressive scan image from an interlaced image. In this, for each pixel to be inserted in the field from the interlaced image a difference value is derived from each pair of a set of symmetrically opposed pixels with respect to the pixel to be reconstructed and from adjacent lines to the pixel to be reconstructed. A determination is made as to which pair of pixels has the lowest difference value associated with it and the average value of this pixel is selected as a value of the pixel to be inserted.

Abstract: A method and apparatus are provided for displaying a progressive scan television signal derived from interlaced fields of a television signal. A colour space vector is derived for a current pixel and for each of at least two adjacent pixels within at least one field. A difference value between the current pixel colour space vector and each of the at least two adjacent pixel colour space vectors is then derived and used to determine whether motion is present at the current pixel. An appropriate method to derive the progressive scan image is then selected in dependence on the result of the determination.

Abstract: A pulldown-sequence detecting device includes a determining unit that performs motion determination on every pixel by comparing a field of an interlace image input into the device with a field of the preceding frame stored in a field memory, a calculating unit that calculates a difference between the features of the portions determined as having some movement by the determining unit and the corresponding portions of the immediately preceding field stored in another field memory, and a detecting unit that detects a pulldown sequence on the basis of the variation pattern of the inter-field feature differences calculated by the calculating unit.

Abstract: An output pixel datum is produced from input pixel data by a method wherein the brightness levels of several input pixels closely associated coordinate-wise with the output pixel, are examined to determine whether a relatively less complex graphics-optimized scaling procedure, or a relatively more sophisticated video-optimized scaling procedure, should be carried out. In the second case, directional interpolation is performed with a plurality of directions, e.g., being considered to determine the direction of minimum brightness level gradient. A plurality of intermediate pixels, e.g., four, are produced, which are aligned perpendicularly to the minimum brightness level gradient direction, their brightness levels being determined from relevant input pixels using linear interpolation. The output pixel brightness level is determined from the intermediate pixels through the use of an appropriate filtering technique, e.g., polyphase FIR filtering.

Abstract: Using an index indicating the amount of motion and noise in the video image calculated on the basis of the discrepancy pixel numbers of image two fields ago and the present image, the reliability of detection result is obtained and utilized, so as to improve the repeat field detection accuracy and the scene change detection accuracy. Further, adaptive filter accuracy is improved by changing the determination conditions in the determination of the filter to be used. In addition, filter control accuracy is improved by suppressing the filter fluctuation per unit time.

Abstract: A video signal processing apparatus includes a main picture processor, an interlace recovering module and a video encoder. The main picture processor produces corresponding main picture signals based on video signals from a memory. The main picture signals are converted to progressive scan signals through a predetermined video signals processing. The interlace recovering module receives the progressive scan signals, retrieves the even portion and the odd portion of the progressive video signals alternately, and generates a set of interlace-scan signals. The video encoder receives both the progressive scan signals and the interlace scan signals and generates a set of progressive video signals and a set of interlace video signals to corresponding video display apparatuses. Thereupon, the video reproduction system can simultaneously provide both the progressive video signals and interlace video signals to the video display apparatuses.

Abstract: A method of super resolution-based deintelacing processing in interlaced video sequences is provided. Block matching is applied on each image block to obtain a motion vector MV. Using MV as the initial motion vector, optical flow is applied on that block to obtain a sub-pixel resolution motion vector OF. Missing pixels are then interpolated using motion vector OF and one or more images in the sequence.

Abstract: A method for determining a value for a missing target pixel in an image frame includes generating a classification index from a plurality of classification pixels in a classification window associated with the missing target pixel where the classification index indicates whether a recognizable pattern is detected in the classification window, using the classification index to select a filter index via a lookup table associated with the classification index, using the selected filter index to select a set of filter coefficients via a lookup table associated with the filter index, and calculating the value for the missing target pixel using the selected set of filter coefficients.

Abstract: A method for processing motion information in an input interlace-scanned pixel signal is disclosed. The motion information processing method includes the steps of detecting motion information of a target pixel based on difference information of a pixel signal at the same location between two fields, outputting the motion information of the target pixel by determining the motion information of the target pixel based on the detected motion information of the target pixel in the target field and the motion information of the target pixel in a past field prior to the target field, and determining whether moving pixels of at least a predetermined number are present within an area containing a plurality of adjacent pixels containing the target pixel in the target field, wherein the moving pixel has motion information indicating a moving picture.

Abstract: According to one embodiment, a video signal diagonal interpolation apparatus performs a diagonal interpolation in a high correlation diagonal direction having the highest correlation in a video signal and a delay signal in which the video signal is delayed. The video signal diagonal interpolation apparatus has a longitudinal-diagonal correlations detection device respectively detecting an upper side diagonal correlation along the high correlation diagonal direction of an upper side pixel positioning at an upper side of an interpolation pixel, and a lower side diagonal correlation along the high correlation diagonal direction of a lower side pixel positioning at a lower side of the interpolation pixel, as for the interpolation pixel disposed at an interpolation position in the high correlation diagonal direction.

Abstract: A method including, in some embodiments, comparing a preceding field and a succeeding field of a video signal for motion at a locus of a current pixel in a current field to be interpolated, in an instance of no motion determining which of a current pixel location in the preceding field and the succeeding field is closer to an estimate of a neighbor pixel and using the result of the determination to decide which of the preceding and succeeding fields to use to interpolate the current pixel based on symmetric spatial neighbors of the current pixel, and in an instance of motion interpolating the current pixel based on symmetric spatial neighbors of the current pixel at a line above and a line below the current pixel in the current frame.

Abstract: A method of converting interlaced video to progressive video can include a series of steps. The method can include receiving a video signal representative of at least one picture and determining whether the picture is progressive. If the picture is progressive, a vertical synchronization signal is modified to create an association with a first field of the picture. Accordingly, a progressive video signal can be converted to an interlaced video signal associated with the vertical synchronization signal and the interlaced video signal can then be converted to a progressive video signal in correspondence with modifications made to the vertical synchronization signal.

Abstract: A bad editing detection device is provided to pre-detect a bad editing of image signal, so as to avoid zigzag effect in the television image. When the input image is from a film, instead of from a video source, the line doubler performs a de-interlace for the film signal to increase the vertical resolution of the television signal. The detection device detects a bad editing before the image signal is played and adjusts the de-interlace of the line doubler to avoid zigzag effect.

Abstract: A method of deinterlacing interlaced fields of video for display in a progressive display device includes providing at least one candidate motion vector per scan line and determining, at least one final motion vector per scan line of interlaced video, for use in deinterlacing the interlaced fields, by iteratively changing the at least one candidate motion vector per scan line based on pixel intensities from each of a plurality of same polarity fields at locations along a single dimension.

Abstract: A pull-down signal detection circuit includes an inter-field correlation determination unit configured to determine an inter-field correlation on the basis of a current field signal and a 1-field delay signal, and providing a determination result which indicates a “strong/middle/weak” level, an inter-frame correlation determination unit configured to determine an inter-frame correlation on the basis of the current field signal and a 2-field delay signal, and a pull-down signal determination unit configured to determine whether the input video signal is a pull-down signal or not, on the basis of the determination results of the inter-field correlation determination unit and the inter-frame correlation determination unit.

Abstract: An image display apparatus includes an active-period interlaced-to-progressive (IP) converter configured to convert active periods (video periods) included in interlaced signals into progressive signals; a blanking-period IP converter configured to convert blanking periods included in the interlaced signals into progressive signals; a multiplexer configured to generate and output display data including both the progressive signals associated with the active periods and the progressive signals associated with the blanking periods; and a display unit configured to display the data output from the multiplexer. The blanking-period IP converter is configured to generate the progressive signals associated with the blanking periods by executing IP conversion in which values copied from data included in the interlaced signals or values corresponding to black pixels are set as pixel values of an interpolated field not included in field data of the interlaced signals.

Abstract: An image processing apparatus for deinterlacing and vertical scaling a plurality of initial scan lines includes a control unit, a deinterlacer, a vertical scaler and a buffer. The control unit controls the deinterlacer and the vertical scaler to store parts of the processed scan lines thereof into the buffer according to a scaling ratio factor and a vertical scaling algorithm.

Abstract: An image display apparatus includes an interlaced-to-progressive converter configured to receive input of interlaced signals and to convert the interlaced signals into progressive signals including interpolated pixels generated by interpolation; a level converter configured to adjust output levels of the interpolated pixels included in the progressive signals generated by the interlaced-to-progressive converter; and a display unit employing a frame-holding display method, configured to output an image obtained through the level conversion by the level converter.

Abstract: An image display apparatus includes the following elements. An IP converter performs signal conversion processing for converting an interlace signal into a progressive signal including information on interpolated pixels. A frame controller temporally divides an input image frame to generate a plurality of sub-frames. A high-frequency-enhanced sub-frame generator and a high-frequency-suppressed sub-frame generator perform filtering processing on the sub-frames to generate high-frequency-enhanced sub-frames and high-frequency-suppressed sub-frames, respectively. A first output controller alternately outputs the high-frequency-enhanced sub-frames and the high-frequency-suppressed sub-frames. A gain controller adjusts an output level of the sub-frames.

Abstract: In a picture signal processing circuit, in the case of converting picture signal data compliant with an analog video standard to a digital video format to obtain progressive data of a digital value, in a line which is included in a picture display period (active period=486 lines) of a digital progressive standard (e.g., the 40th to 525th lines in the second field) and which corresponds to a video display blank period of an analog progressive standard (e.g., the 40th to 42nd lines in the second field), the data is interpolated with data which is the same as the data obtained immediately after the start of a picture display period of the analog progressive standard (data of the 43rd line).

Abstract: To enable a progressive synthesization process suited to each video signal even in such a case that a difference between video signals based on a video transmission sequence and the video signals not based on the video transmission sequence, is fuzzy.

Abstract: A de-interlacer includes recursive motion history map generating circuitry operative to determine a motion value associated with one or more pixels in interlaced fields based on pixel intensity information from at least two neighboring same polarity fields. The recursive motion history map generating circuitry generates a motion history map containing recursively generated motion history values for use in de-interlacing interlaced fields wherein the recursively generated motion history values are based, at least in part, on a decay function.

Abstract: There is disclosed an adaptive de-interlacing method and apparatus based on a phase corrected field of an input interlaced picture signal, and a recording medium storing computer programs for executing the method. The method includes: generating a phase corrected kth field by compensating a phase of the kth field of the input interlaced picture signal by 1 line frequency; calculating a first motion vector between the phase corrected kth field and the (k?1)th field of the interlaced picture signal; calculating a second motion vector between the (k?1)th field and the (k+1)th field of the interlaced picture signal; and determining whether there is motion of the input picture based on the first and second motion vector values, and generating a kth progressive frame based on the result and the kth field. Thus, a serration phenomenon is minimized after de-interlacing by more exactly detecting the motion information of a corresponding inserted field.

Abstract: The present invention discloses a scalable video format conversion system, which utilizes a plurality of system resources to convert an interlaced video signal into a progressive video signal. The disclosed scalable video format conversion system contains a scalable motion-adaptive de-interlacing system and a mode control module. The mode control module determines a detection number dynamically according to the availability of the system resources and/or the status of the scalable video format conversion system. A variable-field motion detection apparatus of the scalable motion-adaptive de-interlacing system accesses a plurality of video fields to detect a motion situation of an image area, wherein the number of the plurality of accessed video is equal to the detection number determined by the mode control module.

Abstract: The invention relates to an information signal processor suitable for use in conversion of, for example, an SD signal. Pixel data sets are extracted selectively from the SD signal. Class CL is then obtained using the pixel data sets. A coefficient production circuit produces coefficient data sets Wi for each class based on coefficient seed data sets for each class and values of picture quality adjusting parameters, h and v obtained by user operation. A tap selection circuit selectively extracts the data sets xi of the tap corresponding to the objective position in the HD signal from the SD signal and then, a calculation circuit produces the pixel data sets of the objective position in the HD signal according to an estimation equation using the data sets xi and the coefficient data sets Wi.

Abstract: There is provided a video signal processing apparatus that makes it possible to realize a favorable display of pictures by increasing the detection accuracy of the video source of an input video signal and by using an appropriate scanning method for an output video signal in accordance with the determined type of video source.

Abstract: Processing video signals may comprise converting interlaced formatted video to progressive scan video by simultaneously performing: color edge detection on a first and second field; temporal filtering on the second field and third field; and 3:2 pull down detecting on the second field and the third field. A bound output may be generated by binding an output from the color edge detecting and are output from the temporal filtering.

Abstract: In the conversion of a video signal from interlaced to progressive scanning, the value of each pixel on an interpolated scan line is calculated by a procedure that includes calculating similarity values for pairs of pixel blocks located in point-symmetrical positions on opposite sides of the interpolated pixel; deciding whether similar edges are present in corresponding positions in the two pixel blocks constituting each pixel block pair; selecting an interpolation direction corresponding to the most similar pixel block pair among the pixel block pairs in which the similar edges are present; and using the pixels disposed at or closest to the centers of the two pixel blocks in this pixel block pair as reference pixels. Restricting diagonal interpolation directions to pixel block pairs in which similar edges are present improves the accuracy of the interpolation direction.

Abstract: According to preferred embodiments of the present invention, an image signal processing apparatus for converting an interlace signal which creates a frame image by alternately displaying an odd field and an even field on a single screen into a progressive signal, includes a line memory for storing the interlace signal, a writing/reading portion for writing/reading the interlace signal into/from the line memory, a signal generation portion for generating a prescribed signal, a selector for selectively outputting the interlace signal from the line memory or the prescribed signal from the signal generation portion, and a controller for controlling signal selection by the selector.

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 system and method that scales interlaced video fields with different sizes in a deinterlacer. The deinterlacer may expect video fields of a certain size. The input to the system may be a video stream of interlaced content, with fields having different sizes depending on the video content. The method scales the input video fields to the appropriate size expected by the deinterlacer. The expected size of the fields may be programmable. The method may provide an output with the expected size of black pixels in the absence of an input to the system.

Abstract: A method and system for performing fuzzy logic based de-interlacing on film source fields that might be mixed with video on film. An embodiment of the invention comprises an adaptive de-interlacer by weighing between merge operation and interpolation operation in the case of occurring video on film motion object. A weighing factor is generated from video on film pattern based on fuzzy logic inference rules. This weighing factor specifies the weighting between merging and interpolating in assigning the pixel values of the progressive display output.