Sharp Kabushiki Kaisha Corporation

Fg Innovation Company Limited

Yu-Chiao Yang

Chih-Yu Teng

Po-Han Lin

Chih-Yuan Chen

Yu-chieh Nien

A method of decoding video data performed by an electronic device is provided. The method receives the video data and determines a block unit from a current frame included in the video data. The method determines an extrapolation merge list of the block unit. The extrapolation merge list includes multiple extrapolation merge candidates. The method selects an extrapolation reference candidate from the extrapolation merge candidates for the block unit. Each of the extrapolation merge candidates includes multiple previous extrapolation parameters used to reconstruct a corresponding one of multiple extrapolation-reconstructed blocks. The extrapolation reference candidate is one of the extrapolation merge candidates. The method then determines an extrapolation prediction filter of the block unit based on the extrapolation reference candidate, and reconstructs the block unit based on the extrapolation prediction filter.

Device and method for decoding video data

A method of encoding video data is provided. The method determines a block unit of an image frame of the video data. The method determines, for the block unit, a first merge candidate list including multiple merge candidates, and identifies multiple merge subgroups from the first merge candidate list. The method determines multiple first cost values each corresponding to one of the merge candidates, and determines an arrangement of the merge candidates in each of the merge subgroups based on the first cost values. The method determines a second merge candidate list by selecting, from each of the merge subgroups, a first K merge candidates of the merge candidates ordered based on the arrangements. Then, the method selects one of the merge candidates in the second merge candidate list to predict the block unit and encodes one or more merge indices into a bitstream based on the selected merge candidate.

Device and method for coding video data

A method of decoding a bitstream is provided. The method determines a block unit of an image frame of the bitstream. The method determines an intra prediction mode index of the block unit, which corresponds to one of multiple wide-angle candidate modes, each having an angle parameter. The method determines reference samples neighboring the block unit and whether the determined intra prediction mode index is equal to one of predefined indices each corresponding to one of predefined wide-angle modes in the wide-angle candidate modes. The method generates filtered samples based on the determined reference samples. The filtered samples are generated by a reference filter when the determined intra prediction mode index is equal to the one of the predefined indices. The method reconstructs the determined block unit based on the generated filtered samples along a mode direction of the determined intra prediction mode index.

A method of decoding video data performed by an electronic device is provided. The method receives the video data and determines a block unit from a current frame included in the video data. The method further determines an intra prediction mode from a plurality of intra default modes, determine a cross-component prediction (CCP) merge list of the block unit including a plurality of CCP merge candidates; and selecting one of the CCP merge candidates for the block unit to determine a prediction model of the selected CCP merge candidate. The method then predicts the block unit using the prediction model of the selected CCP merge candidate to generate a first prediction block, predicts the block unit based on the intra prediction mode to generate a second prediction block, and reconstructs the block unit based on the first prediction block and the second prediction block.

Embodiments of the disclosure provide a method for determining a specific linear model and a video processing device. The method includes: determining a plurality of linear model parameters of each of a plurality of linear models; determining a chroma template reconstruction and a luma template, wherein the chroma template reconstruction and the luma template are associated with a specific chroma block; determining a chroma template prediction corresponding to each of the plurality of linear models based on the luma template and the corresponding linear model parameters; determining a template cost of each of the plurality of linear models based on the chroma template reconstruction and the corresponding chroma template prediction; and selecting the specific linear model from the linear models based on the template cost of each of the plurality of linear models.

Method for determining specific linear model and video processing device

A method of decoding video data by an electronic device is provided. The electronic device receives the video data and determines a block unit from a current frame included in the video data. The electronic device determines, from a plurality of candidate lines, a partitioning line for dividing the block unit into a pair of geometric partitions using a geometric partitioning mode and, from a plurality of candidate modes, two different prediction modes of the block unit to generate two predicted blocks for the pair of the geometric partitions. The electronic device determines a blending width of the partitioning line from a plurality of candidate widths based on a block size of the block unit and weightedly combining the two predicted blocks along the partitioning line based on the blending width to reconstruct the block unit.

A method of decoding a bitstream by an electronic device is provided. The electronic device receives the bitstream. In addition, the electronic device determines a block unit from an image frame according to the bitstream and selects a plurality of intra candidate modes from a plurality of intra default modes for the block unit. The electronic device further generates a template prediction for each of the plurality of intra candidate modes, selects a plurality of prediction modes from the plurality of intra candidate modes based on the template predictions, and reconstructs the block unit based on the plurality of prediction modes.

A method of decoding video data by an electronic device is provided. The electronic device determines, according to the video data, a block unit from an image frame and a split line of the block unit. The electronic device determines first motion information and second motion information according to the video data. The electronic device determines a first predicted block of the block unit based on the first motion information by an affine model and determines a second predicted block of the block unit based on the second motion information. The block unit is predicted by combining the first predicted block and the second predicted block based on the split line.

A method of decoding video data by an electronic device is provided. The electronic device determines a block unit from an image frame according to the video data. The electronic device determines, for the block unit, a first mode list including intra candidate modes selected from intra default modes, and predicts at least one template region adjacent to the block unit to generate template predictions based on intra template modes. Each of the intra template modes indicates one of the intra candidate modes and one of template reference lines, and the template reference lines include at least one template neighboring line nonadjacent to the at least one template region. The electronic device determines a template cost value between the at least one template region and each of the template predictions, and reconstructs the block unit based on a second mode list determined based on the template cost values.

A method of decoding video data performed by an electronic device is provided. The method receives the video data and determines a block unit from a current frame included in the video data. The method further determines a plurality of neighboring sub-partitions selected from a plurality of neighboring sub-blocks and determines, from the current frame, more than one previously affine-coded block reconstructed in an affine-based mode prior to reconstructing the block unit. The method receives a plurality of neighboring motion vectors of the neighboring sub-partitions and a plurality of affine motion vectors of the affine-coded sub-blocks and derives a motion linear model based on the neighboring motion vectors and the neighboring positions of the neighboring sub-partitions and the affine motion vectors and the affine positions of the affine-coded sub-blocks. Then, the method determines a plurality of derived motion vectors based on the motion linear model for reconstructing the block unit.

A non-transitory medium of a device that stores instructions is provided. The instructions, when executed by a processing unit of the device, cause the device to: receive first motion information having a first list flag for a first reference frame and second motion information having a second list flag for a second reference frame for a block unit; compare the two list flags when a sub-block is included in a specific one of block regions covering a split line of the block unit; store a predefined one of the first and the second motion information for the sub-block without checking whether the two reference frames are included in a list indicated by a value different from the two list flags when the two list flags are the same; and store the first and the second motion information together for the sub-block when the two list flags are different.

Non-transitory machine-readable medium, device and method for determining stored motion information

A non-transitory medium of a device that stores one or more instructions is provided. The instructions, when executed by a processing unit of the device, cause the device to: determine an affine enabled flag corresponding to one or more image frames from the bitstream; determine a maximum index corresponding to the one or more image frames from the bitstream when the affine enabled flag is true; determine that a maximum number of zero or more subblock-based merging motion vector prediction (MVP) candidates is in a number range of 1 to N and generated by subtracting the index value of the maximum index from N when the affine enabled flag is true and K is 1, N being a first integer and K being a second integer less than N; and reconstruct the one or more image frames based on the maximum number of zero or more subblock-based merging MVP candidates.

A method of decoding video data by an electronic device is provided. The electronic device determines at least one block vector predictor for a block unit determined from a current frame according to the video data. The electronic device determines, from the current frame, a block template region adjacent to the block unit and a plurality of candidate template regions each indicated by a specific one of the at least one block vector predictor and a corresponding one of block vector differences in a vector difference list. The electronic device determines a first cost value between the block template region and each of the candidate template regions and determines, based on the first cost values, an adjusted difference list including at least one of the block vector differences. The electronic device selects, based on the adjusted difference list, a reference block from the current frame for reconstructing the block unit.

A method of decoding video data is provided. The method includes: receiving the video data; determining, from an image frame of the video data, a block unit; determining a first intra prediction of the block unit based on a decoder-side intra mode derivation (DIMD) mode; determining a second intra prediction of the block unit based on an intra prediction mode other than the DIMD mode; generating a third intra prediction based on the first intra prediction and the second intra prediction; and reconstructing the block unit based on the third intra prediction. In addition, an electronic device using the method is also provided.

Device and method for intra predictions in video coding

A method of decoding a bitstream by an electronic device is provided. The method receives an image frame of a bitstream and determines a block unit having a block width and a block height based on the received image frame. The method determines whether a geometric partitioning mode is disabled for the block unit based on a comparison between the block width and the block height. The method divides the block unit to generate multiple sub-blocks predicted by different merge candidates of the block unit when the geometric partitioning mode is enabled and applied on the block unit. The predicted block is generated by predicting block unit based on a prediction mode different from the geometric partitioning mode when the geometric partitioning mode is disabled for the block unit. The method them reconstructs the block unit based on the predicted block.

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Taipei, Taiwan

Yu-Chiao Yang