公开(公告)号：US20250168358A1

公开(公告)日：2025-05-22

申请号：US18923634

申请日：2024-10-22

Applicant: Tencent America LLC

Inventor： Ziyue XIANG ,  Biao WANG ,  Roman CHERNYAK ,  Yonguk YOON ,  Lien-Fei CHEN ,  Motong XU ,  Shan LIU

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

Abstract: Aspects of the disclosure includes methods and apparatuses for video decoding and encoding and a method of processing visual media data. The method for video decoding includes receiving coded information in a bitstream indicating that a current block is predicted based on a combination of a plurality of intra prediction modes. The method includes determining a plurality of intra predictions of the current block based on the respective intra prediction modes, determining a fused prediction of the current block based on a weighted summation of the plurality of intra predictions where the weighted summation is according to respective weights associated with the plurality of intra predictions, and reconstructing the current block based on the fused prediction. Each weight is based on one of a plurality of weighting functions that depends on a sample location (x, y) and the intra prediction mode of the intra prediction associated with the respective weight.

公开(公告)号：US20250168348A1

公开(公告)日：2025-05-22

申请号：US18923643

申请日：2024-10-22

Applicant: Tencent America LLC

Inventor： Roman CHERNYAK ,  Biao WANG ,  Lien-Fei CHEN ,  Ziyue XIANG ,  Yonguk YOON ,  Motong XU ,  Shan LIU

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

Abstract: A method includes receiving a bitstream of coded information for pictures. The coded information indicates a prediction of a current block using a model based prediction technique, the model based prediction technique generates a prediction sample of the current block based on a model with one or more reconstructed samples of a reference block being input to the model, the model includes one or more parameters derived based on a current template of the current block and a reference template of the reference block. The method also includes performing at least a clipping operation on at least one of the current template and the reference template to obtain clipped template samples; deriving one or more parameter values of the one or more parameters of the model according to the clipped template samples; and generating at least a prediction sample of the current block by the model.

公开(公告)号：US20250150586A1

公开(公告)日：2025-05-08

申请号：US18923624

申请日：2024-10-22

Applicant: Tencent America LLC

Inventor： Yonguk YOON ,  Shan LIU ,  Roman CHERNYAK ,  Biao WANG ,  Lien-Fei CHEN ,  Motong XU ,  Xin ZHAO ,  Ziyue XIANG

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/46

Abstract: A video bitstream including coded information of a current block in a current picture is received. The current block is divided into a plurality of subblocks based on a region division shape of a plurality of region division shapes that is associated with an intra prediction mode of the current block. A weight set is determined for each of the plurality of subblocks, where the weight set includes a first weight for an intra prediction of the respective subblock and a second weight for an inter prediction of the respective subblock. Each of the plurality of subblocks is reconstructed based on the weight set, the intra prediction, and the inter prediction that are associated with the respective subblock.

公开(公告)号：US20250113031A1

公开(公告)日：2025-04-03

申请号：US18896460

申请日：2024-09-25

Applicant: Tencent America LLC

Inventor： Motong XU ,  Roman CHERNYAK ,  Xin ZHAO ,  Madhu PERINGASSERY KRISHNAN ,  Biao WANG ,  Lien-Fei CHEN ,  Yonguk YOON ,  Shan LIU

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/18

Abstract: A method of video decoding includes receiving a bitstream that comprises coded information of a current block, the coded information of the current block includes coded bits of quantized transform coefficients in a transform domain of the current block, the coded information is also indicative of at least a scaling factor to be used during a dequantization of the quantized transform coefficients. The method also includes determining one or more quantization shifting offsets for a reconstruction of transform coefficients in the transform domain based on at least the scaling factor, reconstructing the transform coefficients from the quantized transform coefficients based on the one or more quantization shifting offsets, calculating residuals in a spatial domain of the current block based on the transform coefficients in the transform domain, and reconstructing the current block according to the residuals in the spatial domain.

公开(公告)号：US20250133210A1

公开(公告)日：2025-04-24

申请号：US18913887

申请日：2024-10-11

Applicant: Tencent America LLC

Inventor： Motong XU ,  Roman CHERNYAK ,  Lien-Fei CHEN ,  Biao WANG ,  Yonguk YOON ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/126 ,  H04N19/176 ,  H04N19/18

Abstract: A method includes receiving a bitstream that comprises coded information of a current block, the coded information of the current block indicates a state transition path of a state machine, the state transition path of the state machine includes at least a first state transition associated with a first quantization shifting offset of one or more first transform coefficients in transform coefficients of the current block. The method also includes determining the first quantization shifting offset associated with the one or more first transform coefficients according to the first state transition; reconstructing the one or more first transform coefficients based on the first quantization shifting offset; calculating residuals in a spatial domain of the current block based on at least the one or more first transform coefficients; and reconstructing the current block according to the residuals in the spatial domain.

公开(公告)号：US20250106392A1

公开(公告)日：2025-03-27

申请号：US18893540

申请日：2024-09-23

Applicant: Tencent America LLC

Inventor： Han ZHANG ,  Roman CHERNYAK ,  Lien-Fei CHEN ,  Madhu PERINGASSERY KRISHNAN ,  Biao WANG ,  Xin ZHAO ,  Motong XU ,  Yonguk YOON ,  Shan LIU

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/82

Abstract: Some aspects of the disclosure provide a method of video decoding. The method includes: receiving a bitstream that comprises coded information of one or more pictures; generating, according to the bitstream, at least a to-be-filtered sample, and input samples for filtering the to-be-filtered sample in an in-loop filter, the in-loop filter using a Wiener-based filter with an adaptive filter shape; determining a modified filter shape for the Wiener-based filter, the modified filter shape being adapted according to a relationship between the to-be-filtered sample and the input samples; and applying the Wiener-based filter with the modified filter shape on the input samples to generate a filtered output of the to-be-filtered sample.

公开(公告)号：US20250142062A1

公开(公告)日：2025-05-01

申请号：US18923617

申请日：2024-10-22

Applicant: Tencent America LLC

Inventor： Yonguk YOON ,  Lien-Fei CHEN ,  Biao WANG ,  Roman CHERNYAK ,  Motong XU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/80

Abstract: One or more template predictions are generated for a template of a current block based on one or more prediction modes. The template includes neighboring samples of the current block. Each of the one or more template predictions is generated based on a respective one of the one or more prediction modes. One or more filters are derived for the current block. Each of the one or more filters is derived based on (i) filter index information or (ii) a respective one of the one or more template predictions and a template reconstruction of the template. One or more predictions of the current block are determined. Each of the one or more predictions is determined based on a respective one of the one or more prediction modes. A final prediction of the current block is determined by applying the one or more filters to the one or more predictions.

公开(公告)号：US20250126253A1

公开(公告)日：2025-04-17

申请号：US18912307

申请日：2024-10-10

Applicant: Tencent America LLC

Inventor： Roman CHERNYAK ,  Biao WANG ,  Lien-Fei CHEN ,  Xin ZHAO ,  Motong XU ,  Yonguk YOON ,  Shan LIU

IPC: H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/80

Abstract: A method of video decoding includes receiving a bitstream that comprises coded information of one or more pictures. The coded information indicates an intra prediction of a current block. The method also includes: enabling a reference sample filtering with a bilateral filter when the current block satisfies one or more conditions associated with the reference sample filtering; applying the reference sample filtering with the bilateral filter on reference samples of the current block to obtain filtered reference samples when the reference sample filtering with the bilateral filter is enabled; and reconstructing one or more samples of the current block according to the intra prediction using the filtered reference samples.

公开(公告)号：US20250126249A1

公开(公告)日：2025-04-17

申请号：US18914018

申请日：2024-10-11

Applicant: Tencent America LLC

Inventor： Biao WANG ,  Roman CHERNYAK ,  Lien-Fei CHEN ,  Yonguk YOON ,  Motong XU ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: Aspects of the disclosure includes methods and apparatuses for video decoding and encoding and a method of processing visual media data. The method for video decoding includes receiving coded information in a bitstream indicating that a first intra mode coding method using one of (i) a template-based intra prediction mode derivation (TIMD) and (ii) a decoder-side intra mode derivation (DIMD) is not enabled for a current block. The method for video decoding includes determining at least one template-based intra mode with the first intra mode coding method using the one of the TIMD and the DIMD; and when the at least one template-based intra mode is to be excluded from a second intra mode coding method, determining an intra prediction mode of the current block using the second intra mode coding method excluding the at least one template-based intra mode, and reconstructing the current block using the intra prediction mode.