公开(公告)号：US11051009B2

公开(公告)日：2021-06-29

申请号：US16962538

申请日：2018-12-06

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/103 ,  H04N19/119 ,  H04N19/159 ,  H04N19/174 ,  H04N19/186 ,  H04N19/70

Abstract: Video data processing methods and apparatuses in a video encoding or decoding system for processing a slice partitioned into Coding Units (CUs). The video encoding or decoding system receives input data of a current CU and checks a size of the current CU. The residual of the current CU is set to zero or the current CU is coded in Skip mode if the size of the current CU is greater than a maximum size threshold value. A CU with zero residual implies coefficient level values in one or more corresponding transform blocks are all zero, complicated transform processing for large size blocks is therefore avoided.

公开(公告)号：US11019338B2

公开(公告)日：2021-05-25

申请号：US16966265

申请日：2018-12-12

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/154 ,  H04N19/186 ,  H04N19/124 ,  H04N19/159 ,  H04N19/30 ,  H04N19/60

Abstract: Video encoding or decoding methods and apparatuses for processing video data with color components comprise receiving video data, performing inter prediction and intra prediction, determining a luma Quantization Parameter (QP), deriving a chroma QP bias, calculating a chroma QP from the chroma QP bias and the luma QP, performing transform or inverse transform, and performing quantization or inverse quantization for the luma component utilizing the luma QP and for the chroma component utilizing the chroma QP. The chroma QP bias is derived from an intermediate QP index, and the intermediate QP index is computed by clipping a sum of the luma QP and a chroma QP offset parameter to a specified range. The bits allocated to code the luma and chroma components may be adaptively controlled by restricting the chroma QP bias.

公开(公告)号：US20210136419A1

公开(公告)日：2021-05-06

申请号：US17086650

申请日：2020-11-02

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/172

Abstract: A method for for signaling high-level information in image and video coding is provided. A video decoder receives data from a bitstream to be decoded as a current picture of a video. The video decoder parses a picture header of the current picture that includes a set of one or more slice information syntax elements in the picture header for indicating presence of one or more types of slices that are present in the current picture. The video decoder reconstructs the slices of the current picture by using the set of slice information syntax elements.

公开(公告)号：US20210112247A1

公开(公告)日：2021-04-15

申请号：US17068817

申请日：2020-10-12

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang ,  Chen-Yen Lai ,  Ching-Yeh Chen

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/44 ,  H04N19/96 ,  H04N19/184

Abstract: A video system that applies constraints on block partitioning is provided. The system receives a partitioning control parameter from a bitstream specifying a maximum block size for enabling ternary-tree split that is constrained to be 64 or smaller. The system 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 system splits the current block into one or more partitions recursively, wherein ternary split is disallowed for a partition of the current block unless the partition is less than or equal to the maximum block size. The system reconstructs the one or more partitions of the current block.

公开(公告)号：US10863207B2

公开(公告)日：2020-12-08

申请号：US15777432

申请日：2016-11-25

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang ,  Jicheng An

IPC: H04N19/96 ,  H04N19/91 ,  H04N19/70

Abstract: A method and apparatus for applying entropy coding to a symbol associated with a block are disclosed. According to the present invention, context-based entropy coding is applied to source symbols associated with blocks having variable block sizes generated by partitioning an initial block using a quadtree structure, a binary-tree structure or a combined quadtree plus binary-tree structure. Contexts according to the present invention are based on some information derived from neighbouring blocks and also based on at least one of the shape, the size and the depth of the current block since the statistics of the symbols associated with the current block may be correlated with how the current block has been partitioned through a tree structure. A current symbol to be encoded or decoded may correspond to split flags and modes associated with the tree structure, skip flag or prediction mode flag.

公开(公告)号：US10856009B2

公开(公告)日：2020-12-01

申请号：US15514926

申请日：2015-10-08

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Xiaozhong Xu ,  Yu-Chen Sun ,  Shih-Ta Hsiang ,  Shan Liu

IPC: H04N19/593 ,  H04N19/513 ,  H04N19/52

Abstract: A method of video coding using coding modes including IntraBC mode (Intra-block copy mode) for a picture is disclosed. The system determines whether the current reference block is located above a current coding unit (CU) containing the current prediction unit (PU) in a vertical direction and whether the current reference block is located on a left side of the current CU in a horizontal direction based on the original block vector (BV). If both results are not true, the original BV is clipped to a clipped BV so that a relocated reference block corresponding to the clipped BV is above the current CU in the vertical direction or to the left side of the current CU in the horizontal direction. The clipped BV is used as a predictor for encoding or decoding of a current BV or used for IntraBC encoding or decoding of the current PU.

公开(公告)号：US10819981B2

公开(公告)日：2020-10-27

申请号：US16018489

申请日：2018-06-26

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/13 ,  H04N19/139 ,  H04N19/70 ,  H04N19/91 ,  H04N19/169 ,  H04N19/184 ,  H04N19/52

Abstract: A method of entropy coding for source symbols in an encoder receives a current source symbol having a current symbol value belonging to a set of symbol values. When the source symbols correspond to horizontal components or vertical components of motion vector differences (MVDs) for Inter prediction coding, the method determines a threshold for the set of symbol values. If an absolute current symbol value is greater than the threshold associated with a corresponding motion vector resolution for the current source symbol, the method derives a first binary string. If the absolute current symbol value is not greater than the threshold associated with the corresponding motion vector resolution for the current source symbol, the method derives a second binary string. Finally, the method encodes the first binary string or the second binary string depending on whether the absolute current symbol value is greater than the threshold.

公开(公告)号：US10554974B2

公开(公告)日：2020-02-04

申请号：US15843141

申请日：2017-12-15

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/12 ,  H04N19/157 ,  H04N19/186

Abstract: Methods and apparatus for coding system incorporating AMT (adaptive multiple core transform) for the chroma transform blocks (TBs) are disclosed. According to one method, one or more flags are signaled to indicate whether AMT can be applied for the chroma TBs. If the one or more flags indicate that AMT can be applied for the chroma TBs, the chroma TBs can use the same or separate AMT selection information as the corresponding Luma TB. According to another method, when AMT and the transform skip mode are both available for use for a transform block, the on/off signaling of AMT is coded before the on/off signaling of the transform skip mode. The on/off signaling of the transform skip mode is not coded if the coded AMT on/off flag is true. The on/off signaling of the transform skip mode can be inferred to be false if not coded.

公开(公告)号：US20200014928A1

公开(公告)日：2020-01-09

申请号：US16502347

申请日：2019-07-03

Applicant: MediaTek Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/13 ,  H04N19/182 ,  H04N19/176 ,  H04N19/70 ,  H04N19/96 ,  H04N19/119

Abstract: A video coder that performs entropy coding of a syntax element for partitioning a block of pixels is provided. The video coder receives a current block of pixels of an image. The video coder encodes or decodes the current block of pixels by partitioning the current block of pixels according to a partitioning indicator. The partitioning indicator is entropy coded as a syntax element of a bitstream by using a context model that is selected based on a partitioning structure of the current block of pixels or of a neighboring block of pixels of the current block of pixels.

公开(公告)号：US10356427B2

公开(公告)日：2019-07-16

申请号：US15764346

申请日：2016-09-30

Applicant: MEDIATEK INC.

Inventor： Shih-Ta Hsiang ,  Tzu-Der Chuang ,  Yu-Wen Huang

IPC: H04N19/186 ,  H04N19/91 ,  H04N19/70 ,  H04N19/593 ,  H04N19/182 ,  H04N19/176

Abstract: A method and apparatus for video coding using coding modes including a palette mode are disclosed. In one embodiment, the total number of palette indices in the current block is coded into a binary string using a TR (Truncated Rice) binarization process with the Rice parameter to generate a prefix part and using an EGk (k-th order Exp-Golomb) binary process to generate a suffix part for the binary string, or using the EGk binarization process with the Rice parameter (k). The suffix part is allowed to be empty. In another embodiment, a Rice parameter is determined. If the Rice parameter is equal to or greater than log-base-2 of current block size, the variable related to a total number of palette indices in the current block of video data is binarized into a binary string using a fixed-length code with bit length equal to log-base-2 of current block size.