公开(公告)号：US11812037B2

公开(公告)日：2023-11-07

申请号：US17447156

申请日：2021-09-08

申请人： TENCENT AMERICA LLC

发明人： Xiang Li ,  Xin Zhao ,  Liang Zhao ,  Cheung Auyeung ,  Shan Liu

IPC分类号： H04N11/02 ,  H04N19/176 ,  H04N19/96

CPC分类号： H04N19/176 ,  H04N19/96

摘要： In a method for video decoding, coded information of a current block is received. Dimension information and partition information of the current block is determined based on the coded information, where the dimension information indicates at least one of a height, a width, and a size of the current block, and the partition information indicates a binary tree depth of a coding unit partition of the current block. A partition mode of the current block is determined as one of an intra sub-partition mode and a coding unit partition based on (i) comparisons between values of the height, the width, and the size of the current block and respective threshold values, or (i) a ratio between the value of the height and the value of the width of the current block. The current block is decoded based on the determined partition mode of the current block.

公开(公告)号：US11736709B2

公开(公告)日：2023-08-22

申请号：US17585443

申请日：2022-01-26

申请人： TENCENT AMERICA LLC

发明人： Cheung Auyeung ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/105 ,  H04N19/13 ,  H04N19/159 ,  H04N19/44 ,  H04N19/176 ,  H04N19/70

CPC分类号： H04N19/44 ,  H04N19/105 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

摘要： Aspects of the disclosure provide a method and an apparatus for video coding. In some examples, an apparatus includes processing circuitry that receives a bit stream that includes coded information representing a bin of a syntax element for a current block in a picture. The bin of the syntax element indicates whether a local illumination compensation (LIC) process is applied to code the current block. The processing circuitry selects a context model from multiple candidate context models applicable to coding of the syntax element, according to at least a coding characteristic of a region neighboring the current block, and decodes the coded information according to the selected context model to obtain the bin of the syntax element. The processing circuitry reconstructs the current block in response to the bin of the syntax element.

公开(公告)号：US11706459B2

公开(公告)日：2023-07-18

申请号：US17411611

申请日：2021-08-25

申请人： Tencent America LLC

发明人： Cheung Auyeung ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/60

CPC分类号： H04N19/70 ,  H04N19/176 ,  H04N19/186

摘要： A method of video decoding performed in a video decoder is disclosed. A syntax element can be received from a bitstream of a coded video that indicates whether a sequence of pictures are monochrome or include three color components that are coded separately. By inferring a value of a syntax element, a coding tool can be disabled when the syntax element indicates that the sequence of pictures are monochrome or include three color components that are coded separately. The coding tool uses multiple color components of a picture as input or depends on a chroma component of a picture. Examples of the disabled coding tools can include joint coding of chroma residuals, active color transform (ACT), or block-based delta pulse code modulation (BDPCM) for chroma component.

公开(公告)号：US11665351B2

公开(公告)日：2023-05-30

申请号：US17490562

申请日：2021-09-30

申请人： TENCENT AMERICA LLC

发明人： Cheung Auyeung ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/105

CPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18

摘要： Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that receives a video bitstream including coded residuals of a current block. The processing circuitry determines a plurality of transform coefficients for the current block based on the coded residuals. The processing circuitry calculates, for each of a plurality of sign prediction hypotheses, a cost of the respective sign prediction hypothesis by performing sign prediction on a subset of the plurality of transform coefficients based on a subset of samples in at least one of a topmost row or a leftmost column of the current block. A number of samples in the subset of samples is a constant number. The processing circuitry selects one of the sign prediction hypotheses with a minimal cost. The processing circuitry performs the sign prediction according to the selected sign prediction hypothesis.

公开(公告)号：US20230007262A1

公开(公告)日：2023-01-05

申请号：US17490562

申请日：2021-09-30

申请人： TENCENT AMERICA LLC

发明人： Cheung Auyeung ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176

摘要： Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that receives a video bitstream including coded residuals of a current block. The processing circuitry determines a plurality of transform coefficients for the current block based on the coded residuals. The processing circuitry calculates, for each of a plurality of sign prediction hypotheses, a cost of the respective sign prediction hypothesis by performing sign prediction on a subset of the plurality of transform coefficients based on a subset of samples in at least one of a topmost row or a leftmost column of the current block. A number of samples in the subset of samples is a constant number. The processing circuitry selects one of the sign prediction hypotheses with a minimal cost. The processing circuitry performs the sign prediction according to the selected sign prediction hypothesis.

公开(公告)号：US11343516B2

公开(公告)日：2022-05-24

申请号：US17104688

申请日：2020-11-25

申请人： TENCENT AMERICA LLC

发明人： Ling Li ,  Xiang Li ,  Cheung Auyeung ,  Shan Liu

IPC分类号： H04N19/186 ,  H04N19/70 ,  H04N19/82 ,  H04N19/117 ,  H04N19/124 ,  H04N19/184

摘要： A method of decoding an encoded video. The method includes obtaining the encoded video bitstream and determining whether a chroma array type of a video sequence included in the encoded video bitstream is a first chroma array type indicating that the video sequence includes multiple color planes and that the multiple color planes are jointly. In addition, based on determining that the chroma array type is not the first chroma array type, the method further includes setting a value of at least one syntax element to zero without parsing the at least one syntax element from the encoded video bitstream, and based on the value of the at least one syntax element being zero, decoding the video sequence without applying at least one tool corresponding to the at least one syntax element.

公开(公告)号：US11272187B2

公开(公告)日：2022-03-08

申请号：US16940874

申请日：2020-07-28

申请人： Tencent America LLC

发明人： Liang Zhao ,  Xin Zhao ,  Xiang Li ,  Cheung Auyeung ,  Shan Liu

IPC分类号： H04N19/117 ,  H04N19/70 ,  H04N19/80 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184

摘要： Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. Processing circuitry decodes prediction information of a block from a coded video bitstream. The prediction information is indicative of a matrix based intra prediction for the block. The processing circuitry determines entries of a vector based on neighboring samples of the block. An entry can be determined based on one or more neighboring samples of the block. The processing circuitry converts the entries into a reduced bit form with a number of bits satisfying a requirement of using a first multiplication tool that processes fewer bits than a second multiplication tool. Then, the processing circuitry multiplies, using the first multiplication tool, the entries of the vector in the reduced bit form with entries of a matrix to calculate a subset of prediction samples of the block, and determines other prediction samples of the block based on the subset.

公开(公告)号：US20210168385A1

公开(公告)日：2021-06-03

申请号：US17104688

申请日：2020-11-25

申请人： TENCENT AMERICA LLC

发明人： Ling Li ,  Xiang Li ,  Cheung Auyeung ,  Shan Liu

IPC分类号： H04N19/186 ,  H04N19/70 ,  H04N19/124 ,  H04N19/117 ,  H04N19/82

摘要： A method of decoding an encoded video bitstream includes obtaining the encoded video bitstream; determining whether a chroma array type of a video sequence included in the encoded video bitstream is a first chroma array type indicating that the video sequence includes multiple color planes and that the multiple color planes are jointly encoded; based on determining that the chroma array type is not the first chroma array type, setting a value of at least one syntax element to zero without parsing the at least one syntax element from the encoded video bitstream; and based on the value of the at least one syntax element being zero, decoding the video sequence without applying at least one tool corresponding to the at least one syntax element.

公开(公告)号：US12081736B2

公开(公告)日：2024-09-03

申请号：US17726042

申请日：2022-04-21

申请人： Tencent America LLC

发明人： Cheung Auyeung ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/52 ,  H04N19/573

CPC分类号： H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/52 ,  H04N19/573

摘要： Processing circuitry decodes information of a coding block in a current picture from a bitstream. The information indicates a bi-prediction mode without weight signaling. Weights associated with the bi-prediction mode are not signaled in the bitstream. Further, the processing circuitry determines a first motion vector associated with a first reference picture and a second motion vector associated with a second reference picture, and determine a first reference template in the first reference picture based on a current template of the coding block and the first motion vector and a second reference template in the second reference picture based on the current template and the second motion vector. The processing circuitry also calculates a weight for use in the bi-prediction mode based on the first reference template, the second reference template and the current template, and reconstructs the coding block using the bi-prediction with the calculated weight.

公开(公告)号：US12058321B2

公开(公告)日：2024-08-06

申请号：US17447806

申请日：2021-09-15

申请人： TENCENT AMERICA LLC

发明人： Cheung Auyeung ,  Zhongzheng Yuan ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/117 ,  G06N3/02 ,  H04N19/105 ,  H04N19/176 ,  H04N19/82

CPC分类号： H04N19/117 ,  G06N3/02 ,  H04N19/105 ,  H04N19/176 ,  H04N19/82

摘要： Aspects of the disclosure provide methods and apparatuses for video processing. In some examples, an apparatus for video processing includes processing circuitry. The processing circuitry determines gating weights associated with expert modules based at least partially on a quantization parameter (QP) value. The expert modules are configured to process an input block that includes an image block being reconstructed based on the QP value. The processing circuitry then weights the expert modules based on the gating weights to generate an output image block corresponding to the image block.