公开(公告)号：US20170339419A1

公开(公告)日：2017-11-23

申请号：US15672401

申请日：2017-08-09

Applicant: MediaTek Inc.

Inventor： Tzu-Der CHUANG ,  Yu-Wen HUANG ,  Ching-Yeh CHEN

IPC: H04N19/176 ,  H04N19/463 ,  H04N19/167 ,  H04N19/159 ,  H04N19/13 ,  H04N19/91 ,  H04N19/102

CPC classification number: H04N19/176 ,  H04N19/102 ,  H04N19/13 ,  H04N19/159 ,  H04N19/167 ,  H04N19/463 ,  H04N19/91

Abstract: A method for encoding luma intra mode using context adaptive entropy processing determines a current luma intra mode for a current block and determines whether a neighboring block of the current block within a region of an independently coded slice is on a different side of a boundary of the region from the current block. The method replaces prediction mode information associated with the neighboring block by DC mode if the neighboring block is on the different side of the boundary of the region from the current block, and forms data for processing a current syntax element associated with the current luma intra mode based on the prediction mode information associated with the neighboring block. In addition, the method performs context adaptive entropy encoding processing on the current syntax element according to the formed data.

公开(公告)号：US20160337649A1

公开(公告)日：2016-11-17

申请号：US15111296

申请日：2015-01-29

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/176 ,  H04N19/102 ,  H04N19/46 ,  H04N19/523 ,  H04N19/105 ,  H04N19/159

CPC classification number: H04N19/176 ,  H04N19/102 ,  H04N19/105 ,  H04N19/134 ,  H04N19/159 ,  H04N19/46 ,  H04N19/523

Abstract: A method for adaptive MV precision is disclosed. According to one embodiment, whether to use or not to use the adaptive MV precision for a current block is determined according to a prediction mode/partition type of the current block. If the adaptive MV precision is used, a current MV precision is determined for a current MV of the current block, and the current MV is encoded or decoded at the current MV precision. If the adaptive MV precision is not used, the current MV is encoded or decoded at a finer MV precision. In another embodiment, a value of a current adaptive MV precision flag is selected for a current block to indicate whether to use or not to use the adaptive MV precision for a current block according to a prediction mode/partition type of the current block.

Abstract translation: 公开了一种自适应MV精度的方法。 根据一个实施例，根据当前块的预测模式/分区类型确定是否使用当前块的自适应MV精度。 如果使用自适应MV精度，则针对当前块的当前MV确定当前MV精度，并且以当前MV精度对当前MV进行编码或解码。 如果不使用自适应MV精度，则以更精细的MV精度对当前MV进行编码或解码。 在另一个实施例中，根据当前块的预测模式/分区类型，为当前块选择当前自适应MV精度标志的值，以指示是否使用当前块的自适应MV精度。

公开(公告)号：US20160261863A1

公开(公告)日：2016-09-08

申请号：US15034125

申请日：2014-11-13

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Chia-Yang TSAI ,  Yu-Wen HUANG

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/172 ,  H04N19/82 ,  H04N19/182

CPC classification number: H04N19/82 ,  H04N19/117 ,  H04N19/119 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/196 ,  H04N19/68 ,  H04N19/70

Abstract: A method of adaptive loop filtering with implicit sample-based On/Off control for reconstructed video to improve the performance is disclosed. In one embodiment, each pixel of the video data associated with the reconstructed current image unit is classified into a first group and a second group. Adaptive Loop Filter (ALF) is then applied to these pixels belonging to the first group. For pixels in the second group, ALF is not applied. The image unit may correspond to one coding tree block (CTB) or one coding tree unit (CTU). Various classification means for classifying each pixel into a first group or a second group have also been disclosed. The adaptive loop filtering with implicit sample-based On/Off control may also be used as an additional mode in a system supporting block-based On/Off control.

Abstract translation: 公开了一种采用隐含的基于采样的On / Off控制重建视频来提高性能的自适应环路滤波方法。 在一个实施例中，与重构的当前图像单元相关联的视频数据的每个像素被分类为第一组和第二组。 然后，将自适应环路滤波器（ALF）应用于属于第一组的这些像素。 对于第二组中的像素，不应用ALF。 图像单元可以对应于一个编码树块（CTB）或一个编码树单元（CTU）。 还已经公开了用于将每个像素分类成第一组或第二组的各种分类装置。 具有隐含采样的开/关控制的自适应环路滤波也可以用作支持基于块的开/关控制的系统中的附加模式。

公开(公告)号：US20150365684A1

公开(公告)日：2015-12-17

申请号：US14655447

申请日：2014-03-13

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Chih-Wei HSU ,  Chia-Yang TSAI ,  Yu-Wen HUANG

IPC: H04N19/186 ,  H04N19/59 ,  H04N19/182 ,  H04N19/593

CPC classification number: H04N19/186 ,  H04N19/11 ,  H04N19/159 ,  H04N19/182 ,  H04N19/59 ,  H04N19/593 ,  H04N19/597 ,  H04N19/82

Abstract: A method for cross-color Intra prediction using the LM Intra mode using multi-row or multi-column neighboring reconstructed pixels for LM parameter derivation or using only top pixels or left pixels of neighboring pixels is disclosed. Multiple LM Intra modes can be used. For example, three LM Intra modes can be used and the LM parameters for the three LM Intra modes can be determined based on only the top pixels, only the left pixels and both the top pixels and left pixels of neighboring reconstructed pixels respectively. To remove the need for additional buffer requirement for deriving the LM parameters based on using multi-row or multi-column neighboring reconstructed pixels, the current method re-uses existing buffers, where the buffers are used for deblocking. A syntax element can be used to indicate one of the multi-LM modes selected.

Abstract translation: 公开了一种使用LM内部模式使用多行或多列相邻重建像素进行LM参数推导或仅使用相邻像素的顶部像素或左侧像素的交叉颜色帧内预测的方法。 可以使用多个LM内部模式。 例如，可以使用三个LM内部模式，并且可以仅基于顶部像素，仅左侧像素以及相邻重建像素的顶部像素和左侧像素分别确定三个LM内部模式的LM参数。 为了消除对基于使用多行或多列相邻重建像素导出LM参数的附加缓冲区要求的需要，当前方法重新使用现有的缓冲器，其中缓冲器用于去块。 语法元素可用于指示所选择的多LM模式之一。

公开(公告)号：US20230156181A1

公开(公告)日：2023-05-18

申请号：US17685812

申请日：2022-03-03

Applicant: MEDIATEK INC.

Inventor： Chun-Chia CHEN ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/46 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A video coding method and apparatus include receiving input data associated with a current block, determining a coding mode for the current block by disabling Geometric Partitioning Mode (GPM) when a size of the current block is greater than or equal to a threshold size, and encoding or decoding the current block according to the determined coding mode. In a high-throughput video encoder performing Rate Distortion Optimization (RDO) by parallel Processing Elements (PEs), all or partial PEs receive search range reference samples in a broadcasting form. The parallel PEs test multiple coding modes on various partitioning for the current block, decide a block partitioning structure for dividing the current block into one or more coding blocks, and decide a coding mode for each of the coding blocks.

公开(公告)号：US20220256201A1

公开(公告)日：2022-08-11

申请号：US17608226

申请日：2020-04-30

Applicant: MEDIATEK INC.

Inventor： Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Shih-Ta HSIANG

IPC: H04N19/82 ,  H04N19/174 ,  H04N19/186 ,  H04N19/117 ,  H04N19/136

Abstract: Encoding methods and apparatuses comprise determining parameters of a specific process for a current slice, signaling in one or more Adaptive Parameter Sets (APSs), performing the specific process using the parameters, signaling an APS ID of each signaled APS in a slice header, and encoding the current slice. Each APS is classified into a category according to a type of data carried by the APS. The APS ID of each signaled APS is counted in a category associated with the specific process and is independent of other categories. Decoding methods and apparatuses comprise parsing an APS ID of each referenced APS from a slice header of a current slice for a specific process, determining parameters from each referenced APS according to the parsed APS ID and a category associated with the specific process, performing the specific process on the current slice and decoding the current slice.

公开(公告)号：US20220182629A1

公开(公告)日：2022-06-09

申请号：US17436824

申请日：2020-03-06

Applicant: MEDIATEK INC.

Inventor： Chen-Yen LAI ,  Olena CHUBACH ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC: H04N19/126 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: A method and apparatus for video coding using a coding mode belonging to a mode group comprising an Intra Block Copy (IBC) mode and an Intra mode are disclosed. According to the present invention, for both IBC and Intra mode, a same default scaling matrix is used to derive the scaling matrix for a current block. In another embodiment, for the current block with block size of M×N or N×M, and M greater than N, a target scaling matrix is derived from an M×M scaling matrix by down-sampling the M×M scaling matrix to an M×N or N×M scaling matrix.

公开(公告)号：US20220150507A1

公开(公告)日：2022-05-12

申请号：US17437148

申请日：2020-03-13

Applicant: MEDIATEK INC.

Inventor： Yu-Cheng LIN ,  Chun-Chia CHEN ,  Chih-Wei HSU ,  Ching-Yeh CHEN ,  Tzu-Der CHUANG ,  Yu-Wen HUANG

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/513 ,  H04N19/159 ,  H04N19/176

Abstract: Exemplary video processing methods and apparatuses for encoding or decoding a current block by inter prediction are disclosed. Input data of a current block is received and partitioned into sub-partitions and motion refinement is independently performed on each sub-partition. A reference block for each sub-partition is obtained from one or more reference pictures according to an initial motion vector (MV). A refined MV for each sub-partition is derived by searching around the initial MV with N-pixel refinement. One or more boundary pixels of the reference block for a sub-partition is padded for motion compensation of the sub-partition. A final predictor for the current block is generated by performing motion compensation for each sub-partition according to its refined MV. The current block is then encoded or decoded according to the final predictor.

公开(公告)号：US20220103854A1

公开(公告)日：2022-03-31

申请号：US17426077

申请日：2020-01-22

Applicant: MEDIATEK INC.

Inventor： Man-Shu CHIANG ,  Chih-Wei HSU ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/593 ,  H04N19/119

Abstract: A method and apparatus of prediction for video coding are disclosed. According to one method, a block is partitioned into a first and second regions using a target partition selected from a partition set comprising triangle partition. A Merge candidate list is determined for a partitioned current block by including at least one HMVP (history-based motion vector prediction) candidate from an HMVP buffer, where the HMVP buffer stores motion information of previously coded blocks. The partitioned current block or current motion information associated with the partitioned current block are encoded or decoded using the Merge candidate list, where the Merge candidate list is used to derive a first candidate for the first region and a second candidate for the second region. In another method, whether to apply triangular CIIP (combined Inter/Intra prediction) to the current block is signaled at an encoder side or parsed at a decoder side.

公开(公告)号：US20220094939A1

公开(公告)日：2022-03-24

申请号：US17424639

申请日：2020-01-22

Applicant: MEDIATEK INC.

Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN

IPC: H04N19/13 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176

Abstract: A method and apparatus for encoding or decoding transform coefficients in a video coding system are disclosed. According to this method, a region after zero-out is determined. A remaining number of context-coded bins is determined for the current TB based on a size of the region after zero-out. The current TB is encoded or decoded using context-based coding with a constraint based on the remaining number of context-coded bins. According to another method, a remaining number of context-coded bins is determined for the current TB based on the last significant CG index.