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公开(公告)号:US20230047501A1
公开(公告)日:2023-02-16
申请号:US17874009
申请日:2022-07-26
Applicant: MediaTek Inc.
Inventor: Chih-Yao Chiu , Chun-Chia Chen , Chih-Wei Hsu , Ching-Yeh Chen , Tzu-Der Chuang , Yu-Wen Huang
IPC: H04N19/105 , H04N19/136 , H04N19/182 , H04N19/176
Abstract: For each prediction candidate of a set of one or more prediction candidates of the current block, a video coder computes a matching cost between a set of reference pixels of the prediction candidate in a reference picture and a set of neighboring pixels of a current block in a current picture. The video coder identifies a subset of the reference pictures as major reference pictures based on a distribution of the prediction candidates among the reference pictures of the current picture. A bounding block is defined for each major reference picture, the bounding block encompassing at least portions of multiple sets of reference pixels for multiple prediction candidates. The video coder assigns an index to each prediction candidate based on the computed matching cost of the set of prediction candidates. A selection of a prediction candidate is signaled by using the assigned index of the selected prediction candidate.
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公开(公告)号:US11973985B2
公开(公告)日:2024-04-30
申请号:US17892933
申请日:2022-08-22
Applicant: MediaTek Inc.
Inventor: Chih-Yao Chiu , Chun-Chia Chen , Chih-Wei Hsu , Tzu-Der Chuang , Ching-Yeh Chen , Yu-Wen Huang
IPC: H04N11/02 , H04N19/105 , H04N19/109 , H04N19/117 , H04N19/119 , H04N19/137 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/182 , H04N19/615
CPC classification number: H04N19/615 , H04N19/105 , H04N19/109 , H04N19/117 , H04N19/119 , H04N19/137 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/182
Abstract: Various schemes pertaining to pre-encoding processing of a video stream with motion compensated temporal filtering (MCTF) are described. An apparatus determines a filtering interval for a received raw video stream having pictures in a temporal sequence. The apparatus selects from the pictures a plurality of target pictures based on the filtering interval, as well as a group of reference pictures for each target picture to perform pixel-based MCTF, which generates a corresponding filtered picture for each target picture. The apparatus subsequently transmits the filtered pictures as well as non-target pictures to an encoder for encoding the video stream. Subpictures of natural images and screen content images are separately processed by the apparatus.
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公开(公告)号:US11212523B2
公开(公告)日:2021-12-28
申请号:US17145568
申请日:2021-01-11
Applicant: MEDIATEK INC.
Inventor: Chih-Yao Chiu , Chun-Chia Chen , Chih-Wei Hsu
IPC: H04N19/105 , H04N19/51
Abstract: Video processing methods and apparatuses include receiving input video data, determining a Merge number for a regular Merge mode, comparing the Merge number for the regular Merge mode with a predefined value, and only signaling or parsing a difference between the Merge number for the regular Merge mode and a Merge number for a Geometric Partition Mode (GPM) Merge mode when the Merge number for the regular Merge mode is larger than or equal to the predefined value. The difference between the Merge numbers is inferred to 0 when the difference is not signaled. The Merge number for the GPM Merge mode defines a size of a GPM Merge candidate list constructed for each block coded or to be coded by the GPM Merge mode.
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公开(公告)号:US11805245B2
公开(公告)日:2023-10-31
申请号:US17874009
申请日:2022-07-26
Applicant: MediaTek Inc.
Inventor: Chih-Yao Chiu , Chun-Chia Chen , Chih-Wei Hsu , Ching-Yeh Chen , Tzu-Der Chuang , Yu-Wen Huang
IPC: H04N19/105 , H04N19/176 , H04N19/182 , H04N19/136
CPC classification number: H04N19/105 , H04N19/136 , H04N19/176 , H04N19/182
Abstract: For each prediction candidate of a set of one or more prediction candidates of the current block, a video coder computes a matching cost between a set of reference pixels of the prediction candidate in a reference picture and a set of neighboring pixels of a current block in a current picture. The video coder identifies a subset of the reference pictures as major reference pictures based on a distribution of the prediction candidates among the reference pictures of the current picture. A bounding block is defined for each major reference picture, the bounding block encompassing at least portions of multiple sets of reference pixels for multiple prediction candidates. The video coder assigns an index to each prediction candidate based on the computed matching cost of the set of prediction candidates. A selection of a prediction candidate is signaled by using the assigned index of the selected prediction candidate.
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公开(公告)号:US11539939B2
公开(公告)日:2022-12-27
申请号:US17104037
申请日:2020-11-25
Applicant: MEDIATEK INC.
Inventor: Chih-Yao Chiu , Chun-Chia Chen , Chih-Wei Hsu , Ching-Yeh Chen , Yu-Wen Huang , Tzu-Der Chuang
IPC: H04N19/159 , H04N19/105 , H04N19/176 , H04N19/30 , H04N19/46 , H04N19/52
Abstract: Video processing methods and apparatuses for processing a current block in a current picture include receiving input data of the current block, determining a reference picture, determining whether picture sizes of the current and reference pictures are different, determining whether horizontal wraparound motion compensation is enabled for predicting the current block, performing motion compensation for the current block to obtain a reference block from the reference picture, and encoding or decoding the current block according to the reference block. Horizontal wraparound motion compensation is disabled when the picture sizes of the current and reference pictures are different.
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公开(公告)号:US20230164358A1
公开(公告)日:2023-05-25
申请号:US17892933
申请日:2022-08-22
Applicant: MediaTek Inc.
Inventor: Chih-Yao Chiu , Chun-Chia Chen , Chih-Wei Hsu , Tzu-Der Chuang , Ching-Yeh Chen , Yu-Wen Huang
IPC: H04N19/615 , H04N19/177 , H04N19/182 , H04N19/109 , H04N19/137 , H04N19/176 , H04N19/119 , H04N19/117 , H04N19/105 , H04N19/167 , H04N19/172
CPC classification number: H04N19/615 , H04N19/177 , H04N19/182 , H04N19/109 , H04N19/137 , H04N19/176 , H04N19/119 , H04N19/117 , H04N19/105 , H04N19/167 , H04N19/172
Abstract: Various schemes pertaining to pre-encoding processing of a video stream with motion compensated temporal filtering (MCTF) are described. An apparatus determines a filtering interval for a received raw video stream having pictures in a temporal sequence. The apparatus selects from the pictures a plurality of target pictures based on the filtering interval, as well as a group of reference pictures for each target picture to perform pixel-based MCTF, which generates a corresponding filtered picture for each target picture. The apparatus subsequently transmits the filtered pictures as well as non-target pictures to an encoder for encoding the video stream. Subpictures of natural images and screen content images are separately processed by the apparatus.
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