公开(公告)号：US11418778B2

公开(公告)日：2022-08-16

申请号：US17172591

申请日：2021-02-10

申请人： TENCENT AMERICA LLC

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

IPC分类号： H04N19/11 ,  H04N19/117 ,  H04N19/176

摘要： A method of and an apparatus for controlling intra prediction for decoding of a video sequence are provided. The method includes, based on a reference line index signaling, to a decoder, a first reference line nearest to a coding unit, among a plurality of reference lines adjacent to the coding unit, applying intra smoothing on only the first reference line, based on the intra smoothing being applied only on the first reference line, applying intra prediction on the coding unit, and based on the intra prediction being applied on the coding unit, applying a position-dependent intra prediction combination (PDPC) on only the first reference line.

公开(公告)号：US11412235B2

公开(公告)日：2022-08-09

申请号：US17035218

申请日：2020-09-28

申请人： Tencent America LLC

发明人： Ling Li ,  Xin Zhao ,  Xiang Li ,  Shan Liu

IPC分类号： H04N19/186 ,  H04N19/124 ,  H04N19/176 ,  H04N19/70 ,  H04N19/136

摘要： A method of video decoding performed in a video decoder includes receiving a syntax element from a bitstream of a coded video. The syntax element can indicate that residual blocks of a current coding unit (CU) are processed with a color space conversion. The residual blocks of the current CU can include a luma residual block, a first chroma residual block, and a second chroma residual block. In response to receiving the syntax element indicating that the residual blocks of the current CU are processed with the color space conversion, one of two options of color space conversion equations can be selected. An inverse color space conversion using the selected option of color space conversion equations can be applied to the residual blocks of the current CU to generate modified versions of the residual blocks of the current CU.

公开(公告)号：US11405615B2

公开(公告)日：2022-08-02

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： H04N7/12 ,  H04N19/126 ,  H04N19/61 ,  H04N19/186 ,  H04N19/12 ,  H04N19/189

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：US11381821B2

公开(公告)日：2022-07-05

申请号：US17243132

申请日：2021-04-28

申请人： TENCENT AMERICA LLC

发明人： Madhu Peringassery Krishnan ,  Xin Zhao ,  Shan Liu

IPC分类号： H04B1/66 ,  H04N19/124 ,  H04N19/85 ,  H04N19/12

摘要： A system includes code including obtaining code to obtain a first syntax element that indicates a first quantization index value; at least one second syntax element that indicates an offset value, a second quantization index value for another coefficient by combining the first quantization index value and the offset value to obtain a combined value, and modifying the combined value to be a predetermined minimum value as the second quantization index value, fourth obtaining code to obtain a quantization step size that corresponds to the second quantization index value; and determining code to determine a mode in which the coded image is to be decoded based on determining whether the first quantization index value is equal to a quantization index value associated with lossless coding, and based on determining whether the offset value is less than or equal to the quantization index value associated with the lossless coding.

公开(公告)号：US11368721B2

公开(公告)日：2022-06-21

申请号：US16862221

申请日：2020-04-29

申请人： Tencent America LLC

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

IPC分类号： H04N19/00 ,  H04N19/61 ,  H04N19/82

摘要： A method of video decoding performed in a video decoder includes determining whether a first block associated with a second block is coded with a block differential pulse code modulation (BDPCM) mode. The method further includes, in response to determining that the first block is coded with the BDPCM mode, associating the first block with an intra prediction mode value based on a BDPCM directional flag. The method further includes determining an inter prediction mode value for the second block using the intra prediction mode value associated with the first block. The method further includes reconstructing the second block using the determined intra prediction mode value.

公开(公告)号：US11363261B2

公开(公告)日：2022-06-14

申请号：US17164187

申请日：2021-02-01

申请人： TENCENT AMERICA LLC

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

IPC分类号： H04N19/11 ,  H04N19/184 ,  H04N19/176

摘要： Aspects of the disclosure provide method and apparatus for video coding. In some examples, an apparatus includes receiving circuitry and processing circuitry. The processing circuitry decodes prediction information of a block from a coded video bitstream. The prediction information is indicative of a reference line selected from a plurality of potential reference lines and an intra prediction mode selected from a set of potential intra prediction modes that is associated with the reference line. Then the processing circuitry reconstructs at least one sample of the block according to the intra prediction mode and at least one reference sample in the reference line.

公开(公告)号：US11330266B2

公开(公告)日：2022-05-10

申请号：US17061854

申请日：2020-10-02

申请人： TENCENT AMERICA LLC

发明人： Liang Zhao ,  Xin Zhao ,  Shan Liu

IPC分类号： H04N19/00 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/186 ,  H04N19/159

摘要： A method, computer program, and computer system is provided for encoding or decoding video data. Video data including a chroma component and a luma component is received. One or more contexts for entropy coding chroma intra prediction modes are identified based on a co-located luma block at one or more pre-defined positions. The video data is decoded based on the identified contexts.

公开(公告)号：US11323743B2

公开(公告)日：2022-05-03

申请号：US16999753

申请日：2020-08-21

申请人： TENCENT AMERICA LLC

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

IPC分类号： H04N11/02 ,  H04N19/60 ,  H04N19/176

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 of a current block of a coding unit tree in a coded bit stream is decoded. The prediction information indicates at least one allowed block partitioning structure for the current block. A sub-block transform (SBT) mode is determined for the current block based on the prediction information indicating that SBT is used for the current block. A partition of the current block based on the SBT mode is different from a partition of the current block based on the at least one allowed block partitioning structure. The current block is reconstructed based on the SBT mode.

公开(公告)号：US11310529B2

公开(公告)日：2022-04-19

申请号：US17061829

申请日：2020-10-02

申请人： TENCENT AMERICA LLC

发明人： Xin Zhao ,  Madhu Peringassery Krishnan ,  Shan Liu ,  Xiang Li

IPC分类号： H04N7/18 ,  H04N19/60 ,  H04N19/186 ,  H04N19/105 ,  H04N19/159

摘要： A method, computer program, and computer system is provided for coding video data. Video data is received and entropy-parsed into one or more components. The one or more entropy-parsed components are de-quantized. A joint component secondary transformation (JCST) is performed on the one or more components. The video data is decoded based on one or more residual components corresponding to the joint component secondary transformed components.

公开(公告)号：US11310504B2

公开(公告)日：2022-04-19

申请号：US16943544

申请日：2020-07-30

申请人： TENCENT AMERICA LLC

发明人： Madhu Peringassery Krishnan ,  Xin Zhao ,  Shan Liu

IPC分类号： H04N19/129 ,  H04N19/60 ,  H04N19/184 ,  G06F17/16 ,  H04N19/176 ,  H04L65/60

摘要： A method of coding image data performed by at least one processor, may include: receiving information regarding a data block of an image; determining whether at least one of a height or a width of a residual coding block corresponding to the data block of the image is greater than or equal to a pre-defined threshold; and based on determining that the at least one of the height or the width of the residual coding block is greater than or equal to the pre-defined threshold: identifying or generating a reduced-complexity residual coding block by reducing the number of non-zero coefficients in the residual coding block; and performing transform coding of the reduced-complexity residual coding block using a line graph transform (LGT) core to perform direct matrix multiplications for each of the horizontal and vertical dimensions of the reduced-complexity coding block.