公开(公告)号：US20240236349A9

公开(公告)日：2024-07-11

申请号：US18381508

申请日：2023-10-18

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Guichun LI ,  Lien-Fei CHEN ,  Shan LIU

IPC: H04N19/44 ,  H04N19/11 ,  H04N19/12 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/44 ,  H04N19/11 ,  H04N19/12 ,  H04N19/159 ,  H04N19/176

Abstract: Aspects of the disclosure include methods and apparatuses for video coding. One of the apparatuses includes processing circuitry that receives a current block in a bitstream. The current block is predicted with intra prediction fusion comprising multiple candidate intra prediction modes. The processing circuitry derives a dominant intra prediction mode from the multiple candidate intra prediction modes. The processing circuitry applies a transform from a transform set associated with the dominant intra prediction mode for the current block and decodes the current block according to the transform.

公开(公告)号：US20240236300A9

公开(公告)日：2024-07-11

申请号：US18381538

申请日：2023-10-18

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Guichun LI ,  Lien-Fei CHEN ,  Shan LIU

IPC: H04N19/105 ,  G06T5/00 ,  G06T5/20 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573

CPC classification number: H04N19/105 ,  G06T5/007 ,  G06T5/20 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  G06T2207/10016

Abstract: Processing circuitry receives coded information of a current block indicative of applying LIC on the current block according to at least a first reference block in a first reference picture. The processing circuitry determines, for a sample in the current block, at least a first reference sample in the first reference block, the first reference sample is co-located to the sample in the current block. The processing circuitry calculates a weighted sum of a plurality of terms and an offset for the LIC according to a plurality of parameter values for a plurality of parameters used in the LIC, and reconstructs the sample accordingly. The plurality of parameter values includes at least a first weighting value for a first weighting that is applied to a non-linear term of the first reference sample of a kth power, k is a power index value and is not equal to 1.

公开(公告)号：US20240187604A1

公开(公告)日：2024-06-06

申请号：US18437659

申请日：2024-02-09

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46

Abstract: This disclosure relates generally to video coding and particularly to methods and systems for providing signaling schemes for jointly coding of motion vector difference. An example method for decoding a current video block of a video bitstream is disclosed. The method includes receiving a coded video bitstream; determining, from the coded video bitstream, a flag for a current video block, wherein the flag indicates whether joint motion vector difference (MVD) coding is applied to the current video block; and in response to the flag indicating that the joint MVD coding is applied to the current video block: obtaining, by the device from the coded video bitstream, a joint MVD for the current video block, deriving, by the device based on the joint MVD, an MVD for the current video block, and decoding, by the device based on the joint MVD and the derived MVD, the current video block.

公开(公告)号：US20240163483A1

公开(公告)日：2024-05-16

申请号：US18419124

申请日：2024-01-22

Applicant: TENCENT AMERICA LLC

Inventor： Xiang LI ,  Shan LIU ,  Xin ZHAO

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/186 ,  H04N19/60

CPC classification number: H04N19/70 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/186 ,  H04N19/60

Abstract: A method of video decoding in a decoder is provided. A first template magnitude of a first transform coefficient in a specific frequency region of the transform block is determined. The first template magnitude is a first single value representing magnitudes of a first local template of the first transform coefficient. A first context model is identified for coding the syntax element of the first transform coefficient, the first context model being shared with at least a second transform coefficient in the specific frequency region of the transform block, a second template magnitude of the second transform coefficient having a second single value that belongs to a first subinterval. A first bin of the syntax element of the first transform coefficient and a second bin of the syntax element of the second transform coefficient is determined, from the coded bits, based on the first context model.

公开(公告)号：US20240163455A1

公开(公告)日：2024-05-16

申请号：US18419134

申请日：2024-01-22

Applicant: TENCENT AMERICA LLC

Inventor： Madhu PERINGASSERY KRISHNAN ,  Xin ZHAO ,  Shan LIU

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

CPC classification number: H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61 ,  H04N19/625 ,  H04N19/80 ,  H04N19/91

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：US20240137542A1

公开(公告)日：2024-04-25

申请号：US18381508

申请日：2023-10-17

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Guichun LI ,  Lien-Fei CHEN ,  Shan LIU

IPC: H04N19/44 ,  H04N19/11 ,  H04N19/12 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/44 ,  H04N19/11 ,  H04N19/12 ,  H04N19/159 ,  H04N19/176

Abstract: Aspects of the disclosure include methods and apparatuses for video coding. One of the apparatuses includes processing circuitry that receives a current block in a bitstream. The current block is predicted with intra prediction fusion comprising multiple candidate intra prediction modes. The processing circuitry derives a dominant intra prediction mode from the multiple candidate intra prediction modes. The processing circuitry applies a transform from a transform set associated with the dominant intra prediction mode for the current block and decodes the current block according to the transform.

公开(公告)号：US20240137540A1

公开(公告)日：2024-04-25

申请号：US18380525

申请日：2023-10-16

Applicant: Tencent America LLC

Inventor： Guichun LI ,  Xin ZHAO ,  Lien-Fei CHEN ,  Shan LIU

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

Abstract: A current block is coded by an affine mode and includes a first control point at a first corner of the current block. A current template associated with the first control point is determined. A plurality of candidate reference templates is determined in a reference picture for the current template. A reference template is selected from the plurality of candidate reference templates for the current template based on a template matching (TM) cost. The TM cost indicates a respective difference between each candidate reference template and the current template of the first control point. A first control point motion vector (CPMV) is determined based on the selected reference template, where the first CPMV indicates an offset between the selected reference template in the reference picture and the current template associated with the first control point. The current block is reconstructed based at least on the first CPMV.

公开(公告)号：US20240137520A1

公开(公告)日：2024-04-25

申请号：US18381496

申请日：2023-10-17

Applicant: Tencent America LLC

Inventor： Guichun LI ,  Xin ZHAO ,  Lien-Fei CHEN ,  Shan LIU

IPC: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/521

Abstract: Processing circuitry receives coded information of a motion vector difference (MVD). The processing circuitry calculates cost values associated with value combinations for a plurality of bits in coding bits of the MVD, at least one of the plurality of bits is a bit in a codeword for indicating a magnitude for the MVD. The processing circuitry determines a combination of prediction values for the plurality of bits from the value combinations, the combination of prediction values is associated with a lowest cost value in the cost values. The processing circuitry decodes the coded information of the MVD to obtain one or more indicators for the combination of prediction values, the one or more indicators indicates whether the plurality of bits is correctly predicted by the combination of prediction values. The processing circuitry determines the MVD based on the combination of prediction values and the one or more indicators.

公开(公告)号：US20240073454A1

公开(公告)日：2024-02-29

申请号：US18484064

申请日：2023-10-10

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Xiang LI ,  Shan LIU

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

CPC classification number: H04N19/625 ,  G06F7/78 ,  G06F17/16 ,  H04N19/12

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.

公开(公告)号：US20240073406A1

公开(公告)日：2024-02-29

申请号：US18051397

申请日：2022-10-31

Applicant: TENCENT AMERICA LLC

Inventor： Liang ZHAO ,  Han GAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: This disclosure relates generally to video coding and particularly to methods and systems for determination of temporal motion vector predictor (TMVP) candidates for inter-prediction in video coding. The disclosed methods, for example, include restricting the number of TMVP candidates in a motion vector predictor (MVP) list and provide various search mechanism in order to promote MVP candidate diversity among TMVP and other types of MVP candidates and to improve coding efficiency.