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1. 发明授权

US11595690B2 Methods and apparatus for simplification of coding residual blocks 有权
公开(公告)号：US11595690B2
公开(公告)日：2023-02-28
申请号：US17507067
申请日：2021-10-21
申请人： MEDIATEK INC.
发明人： Shih-Ta Hsiang
IPC分类号： H04N19/61 , H04N19/70 , H04N19/105 , H04N19/176
摘要： Method and apparatus for encoding and decoding prediction residues in a video coding system also disclosed. At the decoder side, a Rice parameter for the target transform coefficient is determined based on a local sum of absolute levels of neighboring transform coefficients of the target transform coefficient. A dependent quantization state is determined and a zero-position variable is determined based on the dependent quantization state and the Rice parameter. One or more coded bits associated with a first syntax element for the target transform coefficient in a transform block are parsed and decoded using one or more codes including a Golomb-Rice code with the Rice parameter, where the first syntax element corresponds to a modified absolute level value of the target transform coefficient. An absolute level value of the target transform coefficient is derived according to the zero-position variable and the first syntax element.

2. 发明授权

US10887594B2 Entropy coding of coding units in image and video data 有权
公开(公告)号：US10887594B2
公开(公告)日：2021-01-05
申请号：US16502347
申请日：2019-07-03
申请人： MediaTek Inc.
发明人： Shih-Ta Hsiang
IPC分类号： H04N19/13 , H04N19/182 , H04N19/176 , H04N19/70 , H04N19/96 , H04N19/119
摘要： 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.

3. 发明申请

US20200322607A1 Coding Transform Coefficients With Throughput Constraints 审中-公开
公开(公告)号：US20200322607A1
公开(公告)日：2020-10-08
申请号：US16836268
申请日：2020-03-31
申请人： MediaTek Inc.
发明人： Shih-Ta Hsiang
IPC分类号： H04N19/13 , H04N19/50 , H04N19/18 , H04N19/182 , H04N19/176 , H04N19/184 , H04N19/70
摘要： 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.

4. 发明授权

US10652555B2 Method and apparatus of palette index map coding for screen content coding 有权
公开(公告)号：US10652555B2
公开(公告)日：2020-05-12
申请号：US16414992
申请日：2019-05-17
申请人： MEDIATEK INC.
发明人： Shih-Ta Hsiang , Tzu-Der Chuang , Yu-Wen Huang
IPC分类号： H04N19/186 , H04N19/91 , H04N19/70 , H04N19/593 , G06T9/00 , H04N19/182 , H04N19/176
摘要： 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.

5. 发明授权

US10116933B2 Method of lossless mode signaling for video system with lossless and lossy coding 有权
公开(公告)号：US10116933B2
公开(公告)日：2018-10-30
申请号：US14916480
申请日：2014-10-14
申请人： MediaTek Inc.
发明人： Shih-Ta Hsiang
IPC分类号： H04N19/172 , H04N19/103 , H04N19/70 , H04N19/12 , H04N19/157 , H04N19/174 , H04N19/124 , H04N19/18 , H04N19/44 , H04N19/65 , H04N19/91
摘要： A method of efficient lossless mode syntax signaling for a coding system supporting both lossless and lossy coding is disclosed. In one embodiment, a first syntax element is incorporated in a picture level to indicate whether to use a forced lossless coding mode if lossless coding is allowed for the current picture. If the first syntax indicates that the forced lossless coding mode is selected, all coding units in the slices of the picture are coded using lossless coding. If the first syntax indicates that the forced lossless coding mode is not selected, each coding unit in a slice of the picture can be coded according to a second syntax element indicating whether each coding unit is coded using lossless coding or not. In another embodiment, the forced lossless mode can be applied to coding units on a slice by slice basis.

6. 发明授权

US10003810B2 Method and apparatus of scalable video coding 有权
公开(公告)号：US10003810B2
公开(公告)日：2018-06-19
申请号：US14378965
申请日：2013-03-19
申请人： MEDIATEK INC.
发明人： Tzu-Der Chuang , Ching-Yeh Chen , Yu-Wen Huang , Jian-Liang Lin , Yi-Wen Chen , Shih-Ta Hsiang , Shan Liu , Shaw-Min Lei
IPC分类号： H04N19/33 , H04N19/52 , H04N19/577 , H04N19/96
CPC分类号： H04N19/33 , H04N19/52 , H04N19/577 , H04N19/96
摘要： A method and apparatus for coding video data using Inter prediction mode or Merge mode in a video coding system are disclosed, where the video data is configured into a Base Layer (BL) and an Enhancement Layer (EL), and the EL has higher spatial resolution or better video quality than the BL. In one embodiment, at least one information piece of motion information associated with one or more BL blocks in the BL is identified. A motion vector prediction (MVP) candidate list or a Merge candidate list for the selected block in the EL is then determined, where said at least one information piece associated with said one or more BL blocks in the BL is included in the MVP candidate list or the Merge candidate list. The input data associated with the selected block is coded or decoded using the MVP candidate list or the Merge candidate list.

7. 发明申请

US20160127747A1 Method of Sample Adaptive Offset Processing for Video Coding 审中-公开
标题翻译：视频编码的样本自适应偏移处理方法
公开(公告)号：US20160127747A1
公开(公告)日：2016-05-05
申请号：US14889406
申请日：2014-07-15
申请人： MediaTek Inc.
发明人： Shih-Ta Hsiang , Yu-Wen Huang
IPC分类号： H04N19/82 , H04N19/567 , H04N19/70
CPC分类号： H04N19/82 , H04N19/117 , H04N19/147 , H04N19/182 , H04N19/567 , H04N19/70 , H04N19/86 , H04N19/91
摘要： A method of modified SAO (sample-adaptive offset) processing for a reconstructed picture in a video coding system to improve the performance is disclosed. In one example, a SAO-sign threshold is introduced to determine the sign of the difference between a current reconstructed pixel and a neighboring reconstructed pixel. A range of difference values greater than the negative SAO-sign threshold and smaller than the positive SAO-sign threshold is assigned to have a sign value of 0. In another example, the SAO-offset value is derived by multiplying the SAO-offset sign with a result from applying left shift by the SAO-bit-shift value to the absolute SAO-offset value. In yet another example, the absolute SAO-offset value is coded by truncated Rice (TR) codes and a maximum TR value is indicated by a syntax element.
摘要翻译：公开了一种用于视频编码系统中的重构图像的改进的SAO（采样自适应偏移）处理方法，以提高性能。在一个示例中，引入SAO符号阈值以确定当前重建像素和相邻重构像素之间的差的符号。分配大于负SAO符号阈值且小于正SAO符号阈值的差值的范围以具有符号值0.在另一示例中，SAO偏移值通过将SAO-偏移符号其结果是将左移由SAO位移位值应用于绝对SAO偏移值。在另一个示例中，绝对SAO偏移值由截断的Rice（TR）代码编码，并且最大TR值由语法元素指示。

8. 发明授权

US11523136B2 Methods and apparatuses for coding transform blocks 有权
公开(公告)号：US11523136B2
公开(公告)日：2022-12-06
申请号：US16727049
申请日：2019-12-26
申请人： MEDIATEK INC.
发明人： Shih-Ta Hsiang
IPC分类号： H04N19/60 , H04N19/13 , H04N19/176
摘要： Video processing methods and apparatuses in a video encoding or decoding system for processing residual data of transform blocks. A current transform block in a video picture is divided into multiple sub-blocks, and each sub-block in the current transform block is entropy encoded or decoded using multiple sub-block coding passes. Each transform coefficient level in each sub-block is visited once according to a pre-defined scanning order in each sub-block coding pass. Two or more syntax elements associated with transform coefficient levels in the current transform block are aggregated and coded in one single sub-block coding pass. The video processing method is applied if the current transform block contains at least one non-zero transform coefficient level and the current transform block is coded in Transform Skip Mode (TSM) according to some embodiments.

9. 发明授权

US11509938B2 Method and apparatus of signaling subpicture information in video coding 有权
公开(公告)号：US11509938B2
公开(公告)日：2022-11-22
申请号：US17087671
申请日：2020-11-03
申请人： MEDIATEK INC.
发明人： Chen-Yen Lai , Shih-Ta Hsiang , Olena Chubach , Tzu-Der Chuang , Ching-Yeh Chen , Lulin Chen
IPC分类号： H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04 , H04N19/70 , H04N19/172 , H04N19/184
摘要： 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.

10. 发明授权

US11405650B2 Method and apparatus of transform coefficient coding 有权
公开(公告)号：US11405650B2
公开(公告)日：2022-08-02
申请号：US17269620
申请日：2019-08-19
申请人： MEDIATEK INC.
发明人： Shih-Ta Hsiang
IPC分类号： H04N19/70 , H04N19/124 , H04N19/176 , H04N19/50 , H04N19/60
摘要： 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.

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