公开(公告)号：US20220094975A1

公开(公告)日：2022-03-24

申请号：US17360803

申请日：2021-06-28

申请人： TENCENT AMERICA LLC

发明人： Xin Zhao ,  Liang Zhao ,  Shan Liu

IPC分类号： H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70 ,  H04N19/96

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 decodes prediction information of a current block in a current picture that is a part of a coded video sequence. The prediction information indicates one of a plurality of intra prediction directions for the current block. The processing circuitry determines a subset of a plurality of reference lines based on the one of the plurality of intra prediction directions indicated in the prediction information. The processing circuitry performs an intra prediction of the current block based on the determined subset of the plurality of reference lines. The processing circuitry reconstructs the current block based on the intra prediction of the current block.

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：US11252438B2

公开(公告)日：2022-02-15

申请号：US16391935

申请日：2019-04-23

申请人： TENCENT AMERICA LLC

发明人： Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/625 ,  H04N19/12 ,  G06F17/16 ,  G06F7/78

摘要： A method of decoding or encoding including receiving information regarding a video sequence for encoding or decoding, determining, for the encoding or decoding of the video sequence, whether to use a first transform core matrix that is of a first size type or a second transform core matrix that is of a second size type, and based on the determining, transmitting information that causes the video sequence to be encoded or decoded using the determined first transform core matrix or second transform core matrix.

公开(公告)号：US11218728B2

公开(公告)日：2022-01-04

申请号：US16889738

申请日：2020-06-01

申请人： TENCENT AMERICA LLC

发明人： Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/593 ,  H04N19/176 ,  H04N19/70

摘要： Aspects of the disclosure provide methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. In a method, prediction information for a current block is decoded. The current block is in a current picture that is a part of a coded video sequence. The prediction information indicates a first intra prediction mode and a secondary transform index for the current block. A secondary transform core is determined based on the first intra prediction mode and the secondary transform index. A primary transform coefficient block is generated based on the secondary transform core and a first transform coefficient block of the current block. The first transform coefficient block is de-quantized from the prediction information. A size of the first transform coefficient block is less than a size of the secondary transform core. The current block is reconstructed based on the primary transform coefficient block.

公开(公告)号：US20210409710A1

公开(公告)日：2021-12-30

申请号：US17468929

申请日：2021-09-08

申请人： TENCENT AMERICA LLC

发明人： Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/122 ,  H04N19/70 ,  H04N19/169 ,  H04N19/18 ,  H04N19/44

摘要： A method and apparatus for performing maximum transform size control for decoding of a video sequence includes identifying, by a decoder, a high-level syntax element associated with the video sequence. A maximum transform size associated with the video sequence is determined based on identifying the high-level syntax element associated with the video sequence. The video sequence is decoded using the maximum transform size based on determining the maximum transform size associated with the video sequence. The video sequence is transmitted based on decoding the video sequence using the maximum transform size.

公开(公告)号：US20210385477A1

公开(公告)日：2021-12-09

申请号：US17411922

申请日：2021-08-25

申请人： TENCENT AMERICA LLC

发明人： Liang ZHAO ,  Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/44 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/159 ,  H04N19/11

摘要： Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video decoding includes processing circuitry that decodes prediction information for a current block in a current picture that is a part of a coded video sequence. The prediction information indicates whether the current block is coded in affine linear weighted intra prediction (ALWIP). Responsive to the prediction information indicating that the current block is coded in ALWIP, the processing circuitry determines an ALWIP mode index irrespective of prediction modes of neighboring blocks adjacent to the current block, the ALWIP mode index indicating one of a plurality of ALWIP modes. The processing circuitry reconstructs the current block according to the one of the plurality of ALWIP modes.

公开(公告)号：US20210337193A1

公开(公告)日：2021-10-28

申请号：US17077564

申请日：2020-10-22

申请人： TENCENT AMERICA LLC

发明人： Yixin DU ,  Xin Zhao ,  Shan Liu

IPC分类号： H04N19/117 ,  H04N19/80 ,  H04N19/60 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

摘要： A method, computer program, and computer system is provided for encoding and decoding video data. Video data is received, and a directionality of a sample block of the received video data is determined. The directionality corresponds to a descriptor, such as edge direction or gradient. A geometric transformation is applied based on the determined directionality. The video data is decoded based on the applied geometric transformation.

公开(公告)号：US20210306634A1

公开(公告)日：2021-09-30

申请号：US17083662

申请日：2020-10-29

申请人： Tencent America LLC

发明人： Sehoon YEA ,  Xin Zhao ,  Shan Liu

IPC分类号： H04N19/126 ,  H04N19/186 ,  H04N19/61

摘要： There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform receiving video data in an AOMedia Video 1 (AV1) format comprising data of at least two chroma prediction-residual signal blocks, a transformation between at least one signal block, having a size less than or equal to a combination of the chroma prediction-residual signal blocks, and the chroma prediction-residual signal blocks, and decoding the video data based on an output of the transformation comprising the at least one signal block having the size less than or equal to the combination of the chroma prediction-residual blocks.

公开(公告)号：US20210076031A1

公开(公告)日：2021-03-11

申请号：US16924845

申请日：2020-07-09

申请人： Tencent America LLC

发明人： Yixin DU ,  Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/117 ,  H04N19/44 ,  H04N19/176 ,  H04N19/82 ,  H04N19/146 ,  H04N19/196

摘要： Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry can decode coded information of a coding block in a picture of a coded video sequence. The coded information can indicate a clipping index m that indicates a clipping value for a filter that is applied to the coding block. The processing circuitry can determine the clipping value associated with the clipping index. The clipping value can be based on a multiplication of a first function and a second function. The first function is dependent on a bit depth B and is independent of the clipping index m, and the second function is dependent on the clipping index m and is independent of the bit depth B. The processing circuitry can generate a filtered coding block by applying the filter corresponding to the clipping value to the coding block.

公开(公告)号：US10819979B2

公开(公告)日：2020-10-27

申请号：US16412575

申请日：2019-05-15

申请人： TENCENT AMERICA LLC

发明人： Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N7/12 ,  H04N19/122 ,  H04N19/176 ,  H04N19/159 ,  H04N19/60

摘要： A method of controlling residual coding for decoding or encoding of a video sequence, is performed by at least one processor and includes determining whether a secondary transform is used, based on a primary transform that is set. The method further includes, based on the secondary transform being determined to be used setting a flag indicating whether the secondary transform is used to indicate that the secondary transform is used, determining the secondary transform, based on the set primary transform and an intra prediction mode of a current block of the video sequence, and performing the residual coding of a luma coding block of the current block and a chroma coding block of the current block, using the set primary transform and the determined secondary transform.