公开(公告)号：US11509938B2

公开(公告)日：2022-11-22

申请号：US17087671

申请日：2020-11-03

Applicant: MEDIATEK INC.

Inventor： Chen-Yen Lai ,  Shih-Ta Hsiang ,  Olena Chubach ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Lulin Chen

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/70 ,  H04N19/172 ,  H04N19/184

Abstract: Methods and apparatus for video coding are disclosed. According to one method, a bitstream is generated or received, where the bitstream includes a first syntax and a second syntax. The first syntax is related to a target number of bits used to represent a set of third syntaxes and each third syntax specifies one subpicture ID for one subpicture in a set of subpictures. The second syntax is related to a total number of subpictures in the set of subpicture, where a first number that can be represented by the target number of bits is equal to or greater than the total number of subpictures. According to another method, the subpicture ID syntaxes have different values for different subpictures.

公开(公告)号：US11405650B2

公开(公告)日：2022-08-02

申请号：US17269620

申请日：2019-08-19

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/176 ,  H04N19/50 ,  H04N19/60

Abstract: A method and apparatus or decoding prediction residues in a video coding system are disclosed. According to this method, a first syntax element to a fourth syntax element are signalled or parsed in a first coding pass for at least sub-block. The current residual block is encoded or decoded using information comprising the first syntax element, the second syntax element, the third syntax element, and the fourth syntax element. The first syntax element indicates whether an absolute value of a current transform coefficient level is greater than 0. The second syntax element indicates whether the absolute value of the current transform coefficient level is greater than 1. The third syntax element indicates a parity of the current transform coefficient level. The fourth syntax element indicates whether the absolute value of the current transform coefficient level downward shifted by 1 is greater than 1.

公开(公告)号：US20150264355A1

公开(公告)日：2015-09-17

申请号：US14660454

申请日：2015-03-17

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang ,  Tzu-Der Chuang

IPC: H04N19/13 ,  H04N19/12 ,  H04N19/139 ,  H04N19/91 ,  H04N19/17 ,  H04N19/21 ,  H04N19/52 ,  H04N19/109 ,  H04N19/196

CPC classification number: H04N19/91 ,  H04N19/517

Abstract: A method of efficient information coding is provided. The method may code a bin string for signaling prefix part of a binarized absolute value of a first vector component of a block vector difference (BVD) or a motion vector difference (MVD). The method may code a bin string for signaling a prefix part of a binarized absolute value of a second vector component of the BVD or the MVD. The method may also code a bin string for signaling a suffix part of a binarized absolute value and a sign of the first vector component. The method may further code a bin string for signaling a suffix part of a binarized absolute value and a sign of the second vector component.

Abstract translation: 提供了一种高效的信息编码方法。 该方法可以编码块向量差（BVD）或运动矢量差（MVD）的第一矢量分量的二进制绝对值的信令前缀部分的bin字符串。 该方法可以编码用于发送BVD或MVD的第二矢量分量的二进制绝对值的前缀部分的bin字符串。 该方法还可以编码用于发送二进制绝对值的后缀部分和第一向量分量的符号的bin字符串。 该方法还可以对用于发信号通知二进制绝对值的后缀部分和第二矢量分量的符号的二进制串。

公开(公告)号：US12160569B2

公开(公告)日：2024-12-03

申请号：US17609707

申请日：2020-05-06

Applicant: MEDIATEK INC.

Inventor： Man-Shu Chiang ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shih-Ta Hsiang

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: A method and apparatus of prediction for video coding are disclosed. According to one method, a luma Intra prediction mode is determined for a corresponding luma block collocated with the current chroma block, where a predefined mode is assigned to the luma Intra prediction mode when the corresponding luma block collocated with the current chroma block satisfies one or more conditions. A chroma Intra prediction mode is determined for the current chroma block according to the luma Intra prediction mode. The current chroma block is then encoded or decoded according to the chroma Intra prediction mode. According to another method, a predefined mode is assigned to Intra prediction mode for the current block when the current block satisfies one or more conditions. The current block is then encoded or decoded according to the Intra prediction mode.

公开(公告)号：US11985314B2

公开(公告)日：2024-05-14

申请号：US17420837

申请日：2019-12-24

Applicant: MEDIATEK INC.

Inventor： Chia-Ming Tsai ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shih-Ta Hsiang

IPC: H04N19/119 ,  H04N19/169 ,  H04N19/176 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/176 ,  H04N19/1883 ,  H04N19/96

Abstract: 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.

公开(公告)号：US11601647B2

公开(公告)日：2023-03-07

申请号：US17343914

申请日：2021-06-10

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/105 ,  H04N19/172 ,  H04N19/119 ,  H04N19/70 ,  H04N19/159 ,  H04N19/96

Abstract: Video processing methods and apparatuses include receiving input data associated with a current picture composed of multiple Coding Tree Units (CTUs) for encoding or decoding, partitioning the current picture into multiple subpictures, determining one or more reference pictures for inter coding the current picture, and encoding or decoding one or more blocks in one or more CTUs of the current picture by inter coding using the one or more reference pictures. Each of the reference pictures used for inter coding the current picture has a same CTU size as that of the current picture when the reference picture is not an Inter Layer Reference Picture (ILRP) containing one subpicture.

公开(公告)号：US11303898B2

公开(公告)日：2022-04-12

申请号：US16836268

申请日：2020-03-31

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/13 ,  H04N19/50 ,  H04N19/18 ,  H04N19/70 ,  H04N19/176 ,  H04N19/184 ,  H04N19/182

Abstract: A video decoder receives data from a bitstream for a block of pixels to be decoded as a current block of a current picture of a video. The current block includes a transform block. The video decoder determines a regular bin budget for the transform block. The video decoder entropy decodes the transform block as either regular bins using context modeling or as bypass bins without context modeling. A number of the regular bins used for entropy coding the transform block is limited by the determined regular bin budget regardless of whether the regular bins represent samples of (i) residual signals used to reconstruct pixel data of the current block or (ii) transform coefficients generated by transform operations of the residual signals. The video decoder reconstructs the current block based on the entropy decoded transform block.

公开(公告)号：US10779007B2

公开(公告)日：2020-09-15

申请号：US15928917

申请日：2018-03-22

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/176 ,  H04N19/44 ,  H04N19/50 ,  H04N19/517 ,  H04N19/593 ,  H04N19/51 ,  H04N19/60 ,  H04N19/157 ,  H04N19/12 ,  H04N19/186 ,  H04N19/70

Abstract: A picture defined in video data is partitioned into blocks that include a luminance (luma) transform block and a chrominance (chroma) transform block. One or more constraints pertaining to the picture are determined from high-level syntax elements and transform skipping of one of both of the luma transform block and the chroma transform block is disallowed if the constraints are not met. The video data are encoded in a bitstream along with an indication that the transform of the luma transform block or the chroma transform block is skipped in response to the transform being skipped.

公开(公告)号：US20180288437A1

公开(公告)日：2018-10-04

申请号：US15939980

申请日：2018-03-29

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/186

Abstract: A method for coding the coded block flags of individual transform blocks in a video coding system is provided. The method improves coding efficiency by jointly signaling the CBF values of Cb transform blocks and Cr transform blocks from a transform unit or coding unit. A single syntax element cbf_chroma is used to jointly code the CBF values of a pair of the collocated Cb and Cr transform blocks from a transform unit.

公开(公告)号：US20150195533A1

公开(公告)日：2015-07-09

申请号：US14586034

申请日：2014-12-30

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang ,  Chih-Ming Fu

IPC: H04N19/117 ,  H04N19/172 ,  H04N19/86 ,  H04N19/154 ,  H04N19/196

CPC classification number: H04N19/117 ,  H04N19/154 ,  H04N19/172 ,  H04N19/196 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86

Abstract: Implementations of sample adaptive offset (SAO) processing a reconstructed picture in an image or video coding system are described. In one example implementation, a method may receive input data associated with the reconstructed picture. The method may also perform multiple stages of SAO filtering operations on a SAO processing unit of at least a portion of the reconstructed picture. Information related to a SAO parameter set that signals one or more SAO types, one or more SAO subtypes, one or more SAO offset values, or a combination thereof, used by the multiple stages of SAO filtering operations are encoded or decoded.

Abstract translation: 描述了在图像或视频编码系统中处理重构图像的采样自适应偏移（SAO）的实现。 在一个示例实现中，方法可以接收与重构图片相关联的输入数据。 该方法还可以在重构图像的至少一部分的SAO处理单元上执行多级SAO滤波操作。 与SAO参数集相关的信息被编码或解码，所述SAO参数集对SAO过滤操作的多个阶段使用的一个或多个SAO类型，一个或多个SAO子类型，一个或多个SAO偏移值或其组合进行信号。