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1. 发明申请

WO2020043193A1 METHOD AND APPARATUS OF SUBBLOCK DEBLOCKING IN VIDEO CODING 审中-公开
公开(公告)号：WO2020043193A1
公开(公告)日：2020-03-05
申请号：PCT/CN2019/103708
申请日：2019-08-30
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , HSU, Chih-Wei , CHEN, Ching-Yeh , CHUANG, Tzu-Der , HUANG, Yu-Wen
IPC分类号： H04N11/04 , H04N19/00
摘要： Method and apparatus for constrained de-blocking filter are disclosed. According to one method, if a CU is partitioned into multiple sub-CUs, the de-blocking process is also applied to the sub-block boundaries inside the current filtered-reconstructed block. According to another method, if first reference samples used for the de-blocking process of a first boundary are to be modified by the de-blocking process of a second boundary, the first reference samples are replaced by padding samples that are not to be modified by the de-blocking process of the second boundary. According to yet another method, the de-blocking process is applied to a reconstructed block corresponding to a current block to result in a current filtered-reconstructed block regardless whether a boundary of the current block corresponds to an 8x8 sample grid boundaries.

2. 发明申请

WO2019205998A1 METHODS AND APPARATUS OF ALTERNATIVE TRANSFORM SKIP MODE FOR IMAGE AND VIDEO CODING 审中-公开
公开(公告)号：WO2019205998A1
公开(公告)日：2019-10-31
申请号：PCT/CN2019/083005
申请日：2019-04-17
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , HSU, Chih-Wei , CHUANG, Tzu-Der , CHEN, Ching-Yeh , HSIANG, Shih-Ta , HUANG, Yu-Wen , LIN, Zhi-Yi
IPC分类号： H04N19/119 , H04N19/61 , H04N19/44
摘要： A method and apparatus for video coding using block partition are disclosed. According to the present invention, a partition structure corresponding to recursively partitioning a current block into smaller TU (transform unit) blocks until the partition structure reaches a maximum allowed split depth or until a block size of at least one of smaller TU blocks is a supported core transform size, where the current block is partitioned into final smaller TU blocks according to the partition structure. A transform coding process is applied to the current block according to the partition structure, where the transform coding process is skipped for at least one of the final smaller TU blocks. A flag can be signalled for the current block to indicate whether the current block is allowed to skip the transform coding process for said at least one of the final smaller TU blocks.

3. 发明申请

WO2021170036A1 METHODS AND APPARATUSES OF LOOP FILTER PARAMETER SIGNALING IN IMAGE OR VIDEO PROCESSING SYSTEM 审中-公开
公开(公告)号：WO2021170036A1
公开(公告)日：2021-09-02
申请号：PCT/CN2021/077862
申请日：2021-02-25
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , HSU, Chih-Wei , HSIANG, Shih-Ta
IPC分类号： H04N19/70 , H04N19/176 , H04N19/172 , H04N19/80 , H04N19/86
摘要： Image or video processing methods and apparatuses comprise receiving input data associated with a current picture or a current slice in the current picture, determining whether the current picture is a monochrome picture, conditionally signaling or parsing chroma deblocking parameters depending on whether the current picture is a monochrome picture, and encode or decode the current picture or current slice. The chroma deblocking parameters are used in a deblocking filter operation applied to chroma components of the current picture or current slice when the current picture is not a monochrome picture. A syntax element may be used to indicate derivation of chroma deblocking parameters, and based on a value of the syntax element, the chroma deblocking parameters are allowed to be explicitly signaled in or parsed from a syntax structure, or the chroma deblocking parameters are implicitly inferred.

4. 发明申请

WO2021023158A1 METHOD AND APPARATUS OF ENCODING OR DECODING VIDEO DATA WITH INTRA PREDICTION MODE MAPPING 审中-公开
公开(公告)号：WO2021023158A1
公开(公告)日：2021-02-11
申请号：PCT/CN2020/106616
申请日：2020-08-03
申请人： MEDIATEK INC.
发明人： CHIANG, Man-Shu , TSAI, Chia-Ming , HSU, Chih-Wei
IPC分类号： H04N19/105 , H04N19/159 , H04N19/186
摘要： A video processing method for a video encoder or decoder comprises receiving input data of a current chroma block in a current picture coded in a 4: 2: 2 color format, determining a luma mode of a luma block corresponding to the current chroma block, mapping the luma mode to a mapped intra mode of the current chroma block, selectively replacing the mapped intra mode by wide angle intra prediction mapping based on a width to height ratio of the current chroma block, deriving an intra predictor according to the mapped intra mode after wide angle intra prediction mapping, and encoding or decoding the current chroma block according to the intra predictor. The mapped intra mode is mode 57 when the luma mode is mode 61 and the mapped intra mode is mode 55 when the luma mode is mode 57.

5. 发明申请

WO2020239038A1 VIDEO PROCESSING METHODS AND APPARATUSES FOR DETERMINING DEBLOCKING FILTER DECISION IN VIDEO CODING SYSTEMS 审中-公开
公开(公告)号：WO2020239038A1
公开(公告)日：2020-12-03
申请号：PCT/CN2020/092978
申请日：2020-05-28
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , HSU, Chih-Wei
IPC分类号： H04N19/159 , H04N19/503
摘要： Video processing methods and apparatuses for coding a current block and an adjacent block comprise receiving input data of the current and adjacent blocks in a current picture, determining that the current and adjacent blocks are both coded in a BDPCM or RDPCM mode, performing a deblocking filtering operation on an edge between the current and adjacent blocks by de-activating deblocking filtering for a first color component and activating deblocking filtering for a second color component, and encoding or decoding the current and adjacent blocks. Each current pixel in a BDPCM coded block is predicted by one or more neighboring pixels of the current pixel. RDPCM is applied to process quantized residues of a RDPCM coded block according to a prediction direction of the RDPCM coded block.

6. 发明申请

WO2020143442A1 METHODS AND APPARATUSES OF PROCESSING VIDEO DATA OF OUT-OF-BOUNDS NODES 审中-公开
公开(公告)号：WO2020143442A1
公开(公告)日：2020-07-16
申请号：PCT/CN2019/127834
申请日：2019-12-24
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , HSU, Chih-Wei , CHUANG, Tzu-Der , CHEN, Ching-Yeh , HUANG, Yu-Wen , HSIANG, Shih-Ta
IPC分类号： H04N19/176
摘要： Video processing methods and apparatuses in a video encoding or decoding system for processing out-of-bounds nodes in a current picture. An out-of-bounds node is a coding tree node with a block region across a current picture boundary. The video processing method or apparatus determines an inferred splitting type, applies the inferred splitting type to split the out-of-bounds node into child blocks, adaptively splits each child block into one or multiple leaf blocks, and encodes or decodes the leaf blocks in the out-of-bounds node inside the current picture. The inferred splitting type for partitioning out-of-bounds nodes in an inter slice, picture, or tile is the same as the inferred splitting type for partitioning out-of-bounds nodes in an intra slice, picture, or tile.

7. 发明申请

WO2019210829A1 SIGNALING FOR ILLUMINATION COMPENSATION 审中-公开
公开(公告)号：WO2019210829A1
公开(公告)日：2019-11-07
申请号：PCT/CN2019/085043
申请日：2019-04-29
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , CHEN, Chun-Chia , HSU, Chih-Wei , CHEN, Ching-Yeh , CHUANG, Tzu-Der
IPC分类号： H04N19/109 , H04N19/176
摘要： A video coder that implements illumination compensation is provided. The video coder receives a first block of pixels in a first video picture to be coded as a current block, wherein the current block is associated with a motion vector that references a second block of pixels in a second video picture as a reference block. The video coder performs inter-prediction for the current block by using the motion vector to generate a set of motion-compensated pixels for the current block. The video coder modifies the set of motion-compensated pixels of the current block by applying a linear model that is computed based on neighboring samples of the reference block and of the current block. The neighboring samples are identified based on a position of the current block within a larger block.

8. 发明申请

WO2020125490A1 METHOD AND APPARATUS OF ENCODING OR DECODING VIDEO BLOCKS WITH CONSTRAINTS DURING BLOCK PARTITIONING 审中-公开
公开(公告)号：WO2020125490A1
公开(公告)日：2020-06-25
申请号：PCT/CN2019/124271
申请日：2019-12-10
申请人： MEDIATEK INC.
发明人： LIN, Zhi-Yi , CHUANG, Tzu-Der , CHEN, Ching-Yeh , TSAI, Chia-Ming
IPC分类号： H04N19/105
摘要： Video processing methods comprise receiving input data of a current block, checking whether the current block is a root block by considering one or more predefined criteria, applying a mode constraint, a chroma split constraint, or both the mode and chroma split constraints to the current block if the current block is set to be a root block, and encoding or decoding the current block. The mode constraint restricts all blocks split from the current block to be processed by a same prediction mode and the chroma split constraints prohibits chroma components of the current block to be further partitioned while allowing a luma component of the current block to be partitioned into smaller blocks.

9. 发明申请

WO2018068762A1 BLOCK PARTITIONING USING TREE STRUCTURES 审中-公开
标题翻译：利用树结构进行块分割
公开(公告)号：WO2018068762A1
公开(公告)日：2018-04-19
申请号：PCT/CN2017/106073
申请日：2017-10-13
申请人： MEDIATEK INC.
发明人： TSAI, Chia-Ming , HSU, Chih-Wei , CHUANG, Tzu-Der , CHEN, Ching-Yeh , HUANG, Yu-Wen
IPC分类号： H04N19/96
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to encode an image or video. A slice is partitioned into a set of first units. For each first unit in the set of first units, the first unit is partitioned into a set of second units. The partitioning includes, for each second unit in the set of second units, determining whether the second unit satisfies a predetermined constraint. If the second unit does not satisfy the predetermined constraint, a first set of partitioning techniques is tested to partition the second unit. If the second unit satisfies the predetermined constraint, the first set of partitioning techniques and a second set of partitioning techniques are tested to partition the second unit. The second unit is partitioned using a technique from the first set of partitioning techniques or the second set of partitioning techniques identified by the testing.
摘要翻译：这里描述的技术涉及被配置为对图像或视频进行编码的方法，装置和计算机可读介质。切片被分成一组第一单位。对于第一单元组中的每个第一单元，第一单元被划分为一组第二单元。对于该组第二单元中的每个第二单元，划分包括确定第二单元是否满足预定约束。如果第二单元不满足预定约束，则测试第一组划分技术以划分第二单元。如果第二单元满足预定约束，则测试第一组分割技术和第二组分割技术以分割第二单元。第二个单元使用来自第一组分区技术的技术或者由测试确定的第二组分区技术进行分区。

10. 发明申请

WO2021115443A1 METHOD AND APPARATUS OF SCALING WINDOW CONSTRAINT FOR WORST CASE BANDWIDTH CONSIDERATION FOR REFERENCE PICTURE RESAMPLING IN VIDEO CODING 审中-公开
公开(公告)号：WO2021115443A1
公开(公告)日：2021-06-17
申请号：PCT/CN2020/135817
申请日：2020-12-11
申请人： MEDIATEK INC.
发明人： CHUANG, Tzu-Der , HSU, Chih-Wei , CHEN, Ching-Yeh , TSAI, Chia-Ming , CHEN, Chun-Chia , CHUBACH, Olena , HUANG, Yu-Wen
IPC分类号： H04N7/24
摘要： Method and apparatus of coding a video sequence, are disclosed. According to the method, a bitstream corresponding to encoded data of the video sequence is generated at an encoder side or received at a decoder side, where the bitstream complies with a bitstream conformance that one or more constraints are satisfied. The constraints are related to a set of RPR (Reference Picture Resampling) parameters including scaling window width or height of a current picture, scaling window width or height of a reference picture, current picture width or height, and maximum picture width or height specified for the video sequence. Scaling information for the RPR mode is derived using the set of RPR parameters. A target picture of the video sequence is then encoded at the encoder side or decoded at the decoder side by utilizing the scaling information when the RPR mode is enabled for the target picture.

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