公开(公告)号：US20220210456A1

公开(公告)日：2022-06-30

申请号：US17699663

申请日：2022-03-21

Applicant: Tencent America LLC

Inventor： Xiang LI ,  Guichun LI ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/176 ,  H04N19/119 ,  H04N19/132

Abstract: An apparatus for video decoding, includes processing circuitry configured to determine an affine model for a current block coded with an interweaved affine mode. Based on the affine model, a first prediction block corresponding to a first pattern for partitioning the current block into first sub-blocks and a second prediction block corresponding to a second pattern for partitioning the current block into second sub-blocks can be generated. The first and second prediction blocks include interpolated samples having an intermediate bit-depth larger than an input bit-depth of the current block. Co-located first and samples in the first and second prediction blocks with a precision corresponding to the intermediate bit-depth are weighted averaged to obtain averaged samples. The averaged samples are rounded to the input bit-depth to obtain corresponding third samples in a final prediction block of the current block.

公开(公告)号：US20220210440A1

公开(公告)日：2022-06-30

申请号：US17693849

申请日：2022-03-14

Applicant: TENCENT AMERICA LLC

Inventor： Xiaozhong XU ,  Byeongdoo CHOI ,  Shan LIU

IPC: H04N19/159 ,  H04N19/119 ,  H04N19/70 ,  H04N19/174 ,  H04N19/44 ,  H04N19/172

Abstract: Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry receives, from a coded video bitstream, coding information for a current picture. At least one flag in the coding information indicates one or more allowable coding types for sub-partitions in the current picture. The one or more allowable coding types include at least one of intra coding and inter coding for the sub-partitions. The processing circuitry determines, based on the at least one flag, whether to decode intra syntax elements used only for coding intra sub-partitions and whether to decode inter syntax elements used only for coding inter sub-partitions. The processing circuitry decodes the intra syntax elements in the coding information when the intra syntax elements are determined to be decoded and decodes the inter syntax elements in the coding information when the inter syntax elements are determined to be decoded.

公开(公告)号：US20220201304A1

公开(公告)日：2022-06-23

申请号：US17691512

申请日：2022-03-10

Applicant: TENCENT AMERICA LLC

Inventor： Madhu Peringassery KRISHNAN ,  Xin ZHAO ,  Shan LIU

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

Abstract: A method includes determining whether at least one of a height or width of a residual coding block, that corresponds to a data block of an image, is greater than or equal to a threshold; and based on determining that the at least one of the height or width of the residual coding block is greater than or equal to the threshold: obtaining a reduced-complexity residual coding block based on 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 residual coding block, wherein the performing includes determining an order of performing horizontal and vertical transforms to the reduced-complexity residual coding block when zero-out is enabled on LGT, depending on a ratio of width to height of the residual coding block.

公开(公告)号：US20220191482A1

公开(公告)日：2022-06-16

申请号：US17447806

申请日：2021-09-15

Applicant: TENCENT AMERICA LLC

Inventor： Cheung AUYEUNG ,  Zhongzheng YUAN ,  Xiang LI ,  Shan LIU

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

Abstract: 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.

公开(公告)号：US20220174281A1

公开(公告)日：2022-06-02

申请号：US17488438

申请日：2021-09-29

Applicant: TENCENT AMERICA LLC

Inventor： Wei JIANG ,  Wei WANG ,  Shan LIU

IPC: H04N19/124 ,  G06N3/04 ,  G06N3/08

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform obtaining an input stream of video data, computing a key based on a floating number in the input stream, predicting a current dependent quantization (DQ) state based on a state predictor and a number of previous keys and a number of previous DQ states, reconstructing the floating number based on the key and the current DQ state, and coding the video based on the reconstructed floating number.

公开(公告)号：US20220159240A1

公开(公告)日：2022-05-19

申请号：US17578604

申请日：2022-01-19

Applicant: TENCENT AMERICA LLC

Inventor： Cheung AUYEUNG ,  Xiang LI ,  Shan LIU

IPC: H04N19/105 ,  H04N19/98 ,  G06F1/03 ,  H04N19/176 ,  H04N19/196 ,  H04N19/18

Abstract: A method, computer program, and computer system is provided for video coding. Video data comprising a reference frame and residual blocks is received. Transform coefficients associated with the residual blocks are identified. The video data corresponding to the one or more residual blocks is encoded based on an extended dynamic range associated with the transform coefficients.

公开(公告)号：US20220150521A1

公开(公告)日：2022-05-12

申请号：US17582570

申请日：2022-01-24

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/44 ,  H04N19/503

Abstract: A method and system for decoding a coded video sequence may include obtaining the coded video sequence, and decoding the coded video sequence. A a value of a temporal sublayer identifier of a video coding layer (VCL) network abstraction layer (NAL) unit in the coded video sequence is constrained to be less than or equal to a value of vps_max_sublayers_ minus1, that specifies a maximum number of temporal sublayers that may be present in a layer in each coded video sequence referring to the video parameter set (VPS), in the VPS referred to by the VCL NAL unit.

公开(公告)号：US20220150518A1

公开(公告)日：2022-05-12

申请号：US17361239

申请日：2021-06-28

Applicant: TENCENT AMERICA LLC

Inventor： Madhu Peringassery KRISHNAN ,  Samruddhi KAHU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/44 ,  H04N19/61 ,  H04N19/119 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

Abstract: Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry can decode coding information for a block from a coded video bitstream. The coding information can indicate an intra prediction mode for the block and one or a combination of transform partitioning information for the block, a size of the block, and a shape of the block. The processing circuitry can determine whether a secondary transform is disabled for the block based on the one or the combination of the transform partitioning information for the block, the size of the block, and the shape of the block. The processing circuitry can reconstruct the block based on the determination of whether the secondary transform is disabled for the block.

公开(公告)号：US20220150510A1

公开(公告)日：2022-05-12

申请号：US17360431

申请日：2021-06-28

Applicant: Tencent America LLC

Inventor： Madhu Peringassery KRISHNAN ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  H04N19/91 ,  H04N19/80 ,  H04N19/625 ,  H04N19/593

Abstract: Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry decodes coded information for a transform block (TB) from a coded video bitstream. The coded information indicates one of intra prediction mode information that indicates an intra prediction mode used for the TB, a size of the TB, and a primary transform type used for the TB. The processing circuitry determines a context for entropy decoding a secondary transform index based on the one of the intra prediction mode information for the TB, the size of the TB, and the primary transform type used for the TB. The secondary transform index indicates a secondary transform in a set of secondary transforms that is to be performed on the TB. The processing circuitry entropy decodes the secondary transform index based on the context and performs the secondary transform.

公开(公告)号：US20220141492A1

公开(公告)日：2022-05-05

申请号：US17575076

申请日：2022-01-13

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Xiang LI ,  Shan LIU

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

Abstract: 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.