公开(公告)号：US20210227206A1

公开(公告)日：2021-07-22

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.

公开(公告)号：US20210195203A1

公开(公告)日：2021-06-24

申请号：US17249667

申请日：2021-03-09

Applicant: MEDIATEK INC.

Inventor： Zhi-Yi LIN ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU

IPC: H04N19/132 ,  H04N19/105 ,  G06F17/16 ,  H04N19/176 ,  H04N19/159

Abstract: Method and apparatus of video coding are disclosed. According to one method, the left reference boundary samples and the top reference boundary samples are checked jointly. According to another method, selected original left reference boundary samples and selected original top reference boundary samples at specific positions are used for predictor up-sampling. According to yet another method, the horizontal interpolation and the vertical interpolation are in a fixed order regardless of a shape of the current block, size of the current block or both.

公开(公告)号：US20210185306A1

公开(公告)日：2021-06-17

申请号：US17121927

申请日：2020-12-15

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Lulin CHEN

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/186 ,  H04N19/187 ,  H04N19/573

Abstract: Method and apparatus of video coding using a multi-layer prediction mode, are disclosed. According to one method, a bitstream is generated at an encoder side or received at a decoder side, where the bitstream corresponds to coded data of current video data in a current layer. The bitstream complies with a bitstream conformance requirement corresponding both the bit depth values for the current layer and the reference layer being the same and the chroma format index values for the current layer and the reference layer being the same. The current video data in the current layer is then encoded or decoded by utilizing reference video data in the reference layer.

公开(公告)号：US20200382772A1

公开(公告)日：2020-12-03

申请号：US16491616

申请日：2018-03-09

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU

IPC: H04N19/11 ,  H04N19/593 ,  H04N19/176 ,  H04N19/159 ,  H04N19/12

Abstract: Method and apparatus for video encoding or decoding performed by a video encoder or a video decoder incorporating a coding tool for Intra prediction with multiple directional Intra prediction modes are disclosed. According to the present invention, one or more coding tool settings are determined based on the Intra prediction mode when the Intra prediction mode is a directional mode so that there is no need for explicitly signalling said one or more coding tool settings determined based on the Intra prediction mode. At the encoder side, the Intra prediction and the coding tool are applied to the current block to generate Intra prediction residues or transformed Intra prediction residues for the current block.

公开(公告)号：US20200344492A1

公开(公告)日：2020-10-29

申请号：US16846514

申请日：2020-04-13

Applicant: MEDIATEK INC.

Inventor： Yu-Ling HSIAO ,  Chih-Wei HSU

IPC: H04N19/583

Abstract: Method and apparatus for constrained mode signaling are disclosed. According to one method, a plurality of mode syntaxes are used to signal a current mode used for the current block. If one or more of the plurality of candidate modes are unavailable according to one or more conditions related to the current block, signaling a mode syntax is skipped at the video encoder side or parsing the mode syntax is skipped at the video decoder side. In one embodiment, a regular flag indicating on or off of a regular Merge mode or Skip mode is not signaled if Merge mode with MVD (MMVD) mode, Affine mode, subblock Temporal Motion Vector Prediction (SbTMVP) mode, Combined Inter and Intra Prediction (CIIP) Merge mode, and Triangle Prediction Mode (TPM) are disabled as indicated by an SPS flag.

公开(公告)号：US20200228832A1

公开(公告)日：2020-07-16

申请号：US16738288

申请日：2020-01-09

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/593

Abstract: Method and apparatus for constrained de-blocking filter are disclosed. According to one method, a current block is partitioned into a plurality of sub-blocks using SDIP (Short Distance Intra Prediction mod). A first Bs (boundary strength) for an internal block boundary of the plurality of sub-blocks is determined by setting the first Bs to a second Bs of an Intra-coded boundary block of the current block. De-blocking process is applied, using the first Bs, to reconstructed samples across the internal block boundary of the plurality of sub-blocks to generate filtered-reconstructed samples. In another method, the current block is partitioned into two sub-blocks using SBT (sub-block transform) horizontally or vertically and the first Bs (boundary strength) is determined for an internal block boundary between the two sub-blocks by setting the first Bs to a second Bs of a non-zero cbf (coded block flag) block of the two sub-blocks in step.

公开(公告)号：US20190327491A1

公开(公告)日：2019-10-24

申请号：US16502535

申请日：2019-07-03

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU

IPC: H04N19/61 ,  H04N19/18 ,  H04N19/70 ,  H04N19/625 ,  H04N19/159 ,  H04N19/122 ,  H04N19/12 ,  H04N19/46 ,  H04N19/176 ,  H04N19/157

Abstract: A method and apparatus for alternative transforms in a video coding system according to a control flag are disclosed. In one embodiment, the control flag for the current PU is determined. If the control flag is on, a first transform is applied to each current TU (transform unit) at an encoder side or an inverse transform of the first transform is applied to each current TU at a decoder side if the current TU has a first boundary type. Furthermore, a second transform is used for each current TU if the current TU has a second boundary type. The first transform is different from the second transform. On the other hand, if the control flag is off, a selected transform is used for each current TU.

公开(公告)号：US20190289317A1

公开(公告)日：2019-09-19

申请号：US16462559

申请日：2017-11-21

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU

IPC: H04N19/52 ,  H04N19/139 ,  H04N19/593

Abstract: A method and apparatus of motion vector reconstruction based on one MVP (motion vector predictor) and one MVD (motion vector difference) are disclosed. According to this method, input data associated with a video sequence including a current block in a current picture are received. Candidate reconstructed MV (motion vector) positions corresponding to all candidate sign pairs of the MVD are derived, where each candidate reconstructed MV position is derived as a vector sum of the MVP and the first magnitude and the second magnitude of the MVD with one candidate sign pair of the MVD. Template matching between the template for the current block and a corresponding template for each candidate reconstructed MV position is evaluated. A target candidate MV position among all candidate reconstructed MV positions is selected. The current block is encoded or decoded using a target candidate MV corresponding to the target candidate MV position.

公开(公告)号：US20180249155A1

公开(公告)日：2018-08-30

申请号：US15755200

申请日：2016-09-06

Applicant: MEDIATEK INC.

Inventor： Chih-Wei HSU ,  Ching-Yeh CHEN ,  Han HUANG

IPC: H04N19/105 ,  H04N19/182

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/182 ,  H04N19/196 ,  H04N19/503 ,  H04N19/51 ,  H04N19/593 ,  H04N19/82

Abstract: A method and apparatus of video coding using Inter prediction with offset derived from neighbouring reconstructed pixels are disclosed. According to the present invention, the NRP (neighbouring reconstructed pixels) in one or more first neighbouring areas of a current block and the EMCP (extended motion-compensated predictors) in one or more second neighbouring areas of a motion-compensated reference block corresponding to the current block are determined. One or more prediction offsets between first pixel values of the NRP and second pixel values of the EMCP are determined. The current block is encoded or decoded using information including the prediction offset(s). The prediction offset may correspond to a single offset used for a whole block. Individual offsets may also be used the pixels of the current block.

公开(公告)号：US20180249154A1

公开(公告)日：2018-08-30

申请号：US15754721

申请日：2016-09-02

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG ,  Jian-Liang LIN ,  Yu-Chen SUN ,  Yi-Ting SHEN

IPC: H04N19/105 ,  H04N19/567 ,  H04N19/176 ,  H04N19/57

Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.