公开(公告)号：US20240267518A1

公开(公告)日：2024-08-08

申请号：US18244833

申请日：2023-09-11

Applicant: Tencent America LLC

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

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70 ,  H04N19/503 ,  H04N19/593

Abstract: The various implementations described herein include methods and systems for encoding and decoding video. In one aspect, a method of video decoding includes receiving video data that includes a first block that is partitioned into a first section and a second section, from a video bitstream. The method further includes identifying a prediction mode for the first block from a syntax element of the video bitstream. In accordance with the prediction mode being a partition-based inter-intra prediction mode wherein the first section is associated with an inter prediction mode and the second section is associated with an intra prediction mode, the first section is blended using a first blending mask and the second section is blended using a second blending mask, the second blending mask being different than the first blending mask. The method also includes decoding the first block using the blended first and second sections.

公开(公告)号：US20240251095A1

公开(公告)日：2024-07-25

申请号：US18241011

申请日：2023-08-31

Applicant: Tencent America LLC

Inventor： Lien-Fei CHEN ,  Xiaozhong XU ,  Xin ZHAO ,  Roman CHERNYAK ,  Shan LIU

IPC: H04N19/50 ,  H04N19/105 ,  H04N19/129 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/50 ,  H04N19/105 ,  H04N19/129 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video decoding includes receiving circuitry and processing circuitry. The processing circuitry receives coded information of a current block in a current picture from a coded video bitstream, the coded information is indicative of applying local illumination compensation (LIC) on the current block according to a reference block in a reference picture. The processing circuitry constructs a parameter set list for the LIC, the parameter set list comprising a plurality of parameter sets for the LIC, and determines a selected parameter set from the parameter set list according to an index that is decoded from the coded video bitstream. The processing circuitry performs the LIC on the current block based on the selected parameter set to generate compensated samples of the current block according to the reference block in the reference picture.

公开(公告)号：US20240242389A1

公开(公告)日：2024-07-18

申请号：US18463538

申请日：2023-09-08

Applicant: Tencent America LLC

Inventor： Jun TIAN ,  Xiaozhong XU ,  Shan LIU

IPC: G06T9/00

CPC classification number: G06T9/001

Abstract: A method and apparatus comprising computer code configured to cause a processor or processors to obtain a mesh, the mesh comprising a frame of a sequence corresponding to three-dimensional (3D) volumetric data, the frame including a plurality of vertices of the mesh, use 4:2:0 sampling to sample the mesh, determine a coefficient of a displacement vector of at least one vertex of the sampled mesh, and decode the mesh based on the coefficient and the sampled mesh.

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：US20240236299A1

公开(公告)日：2024-07-11

申请号：US18376345

申请日：2023-10-03

Applicant: Tencent America LLC

Inventor： Xiaozhong XU ,  Roman CHERNYAK ,  Shan LIU

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/583

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/583

Abstract: Aspects of the disclosure includes methods and apparatuses. One of the apparatuses includes processing circuitry that is configured to receive a bitstream of a current block in a picture. The bitstream includes coding information indicating that the current block is coded according to a prediction mode with a block vector (BV). The processing circuitry determines a reference block in the picture based on the BV of the current block. The reference block and the current block have an overlapped region. The reference block includes both (i) unreconstructed samples in the overlapped region and (ii) reconstructed samples that are outside the overlapped region. The processing circuitry reconstructs the overlapped region in the current block based on the reconstructed samples in the reference block that are outside the overlapped region. In an example, a width of the overlapped region and a height of the overlapped region are multiples of 4.

公开(公告)号：US20240214592A1

公开(公告)日：2024-06-27

申请号：US18458507

申请日：2023-08-30

Applicant: Tencent America LLC

Inventor： Yang SUI ,  Ding DING ,  Xiaozhong XU ,  Shan LIU

IPC: H04N19/42 ,  H04N19/119 ,  H04N19/167 ,  H04N19/176

CPC classification number: H04N19/42 ,  H04N19/119 ,  H04N19/167 ,  H04N19/176

Abstract: Methods and apparatuses for decoding a compressed image using a neural image compression network may be provided. The method may include generating long-range context model parameters associated with a high resolution compressed image, the long-range context model parameters corresponding to a first area. The method may also include splitting the generated long-range context model parameters into a first number of context parameter blocks. The method may also include for each block in the first number of context parameter blocks, predicting respective context features using a long-range context model and respective context parameter blocks, wherein the long-range context model uses a corner-to-center latent decoding strategy or an edge-to-center latent decoding strategy to decode latents associated with the high resolution compressed image. Then, the high resolution compressed image may be reconstructed based on predicted context features.

公开(公告)号：US20240212215A1

公开(公告)日：2024-06-27

申请号：US18458595

申请日：2023-08-30

Applicant: Tencent America LLC

Inventor： Yang SUI ,  Ding DING ,  Xiaozhong XU ,  Shan LIU

IPC: G06T9/00 ,  G06T7/13 ,  G06V10/44

CPC classification number: G06T9/00 ,  G06T7/13 ,  G06V10/44 ,  G06T2207/20164

Abstract: Methods and apparatuses for decoding a compressed image using a neural image compression network are provided. The method may include generating context parameters associated with a compressed image, the context parameters corresponding to a first area. The method may also include determining that a long range global dependency exists between a first latent and a second latent in a long-range global area within the compressed image and predicting a plurality of context features using a transformer-based long-range context prediction model. The method may then include reconstructing the compressed image based on the predicted plurality of context features.

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：US20240179319A1

公开(公告)日：2024-05-30

申请号：US18431652

申请日：2024-02-02

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/132 ,  H04N19/146 ,  H04N19/172 ,  H04N19/184 ,  H04N19/196

CPC classification number: H04N19/132 ,  H04N19/146 ,  H04N19/172 ,  H04N19/184 ,  H04N19/196

Abstract: A method, device, and computer-readable medium for decoding an encoded video bitstream using at least one processor, including obtaining a flag indicating that a conformance window is not used for reference picture resampling; based on the flag indicating that the conformance window is not used for the reference picture resampling, determining whether a resampling picture size is signaled; based on determining that the resampling picture size is signaled, determining a resampling ratio based on the resampling picture size; based on determining that the resampling picture size is not signaled, determining the resampling ratio based on an output picture size; and performing the reference picture resampling on a current picture using the resampling ratio.