公开(公告)号：US20250159186A1

公开(公告)日：2025-05-15

申请号：US18657708

申请日：2024-05-07

Applicant: Tencent America LLC

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

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/172 ,  H04N19/597

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a multi-view video bitstream that includes a first block in a first frame corresponding to a first view and a second block in a second frame corresponding to a second view. The method identifies a first set of reference frames in the first view for the first block. The method obtains motion vectors corresponding to a second set of reference frames in the second view for the second block. In accordance with a determination that the first set of reference frames share a display time with the second set of reference frames, the method derives a motion vector predictor (MVP) for the first block corresponding to the first view using the set of motion vectors corresponding to the second view, and decodes the first block using the derived MVP.

公开(公告)号：US20250159156A1

公开(公告)日：2025-05-15

申请号：US18657709

申请日：2024-05-07

Applicant: Tencent America LLC

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

IPC: H04N19/119 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/52 ,  H04N19/597 ,  H04N19/70

Abstract: An example method includes receiving a multi-view video bitstream comprising a plurality of blocks. The plurality of blocks includes a first block in a first frame corresponding to a first view and a second block in a second frame corresponding to a second view. The method includes determining, based on a first indicator in the multi-view video bitstream, whether block partitioning modes for the first block corresponding to the first view and the second block corresponding to the second view are signaled jointly or separately. The method includes, in accordance with the first indicator indicating that the block partitioning modes are signaled jointly, applying a same block partitioning mode to the first block and the second block in accordance with a second indicator.

公开(公告)号：US20250142060A1

公开(公告)日：2025-05-01

申请号：US18620933

申请日：2024-03-28

Applicant: Tencent America LLC

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

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

Abstract: An example method of video coding includes receiving a video bitstream for a plurality of encoded pictures. The method also includes obtaining a reconstructed picture that corresponds to an encoded picture of the plurality of encoded pictures and deriving a set of quantization parameters for the reconstructed picture, the set of quantization parameters derived from a set of reference quantization parameters for the encoded picture. The method further includes performing loop filtering on the reconstructed picture using the set of quantization parameters.

公开(公告)号：US20250142048A1

公开(公告)日：2025-05-01

申请号：US18677745

申请日：2024-05-29

Applicant: Tencent America LLC

Inventor： Yushin CHO ,  Xin ZHAO ,  Madhu PERINGASSERY KRISHNAN ,  Liang ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

IPC: H04N19/102 ,  H04N19/147 ,  H04N19/159 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70 ,  H04N19/91

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a video bitstream comprising a set of encoded video information and a first indicator associated with a plurality of probability models. The method includes determining a value of the first indicator by parsing the video bitstream. The method includes, when the first indicator has a first value, selecting a first probability model from the plurality of probability models and when the first indicator has a second value, selecting a second probability model from the plurality of probability models, the second probability model being different from the first probability model. The method also includes entropy decoding the set of encoded video information using the selected probability model.

公开(公告)号：US20250126303A1

公开(公告)日：2025-04-17

申请号：US18990167

申请日：2024-12-20

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/96 ,  H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: 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. A first coding tree structure associated with the luma component and a second coding tree structure associated with the chroma component are determined, wherein the first coding tree structure and the second coding tree structure share a same top level coding tree structure. The video data is decoded based on the first coding tree structure and the second coding tree structure.

公开(公告)号：US20250088661A1

公开(公告)日：2025-03-13

申请号：US18497921

申请日：2023-10-30

Applicant: Tencent America LLC

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

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/136 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/80

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current coding block of an image frame and includes a cross-component intra prediction mode. A computing system identifies a sample of the first color component and a sample of the second color component co-located with the sample of the first color component. At least two adjacent samples of the second color component are identified, and a location of each adjacent sample is identified by a horizontal delta coordinate value or a vertical delta coordinate value with respect to the sample of the second color component. The computing system generates the sample of the first color component based on the at least two adjacent samples of the second color component, and reconstructs the current coding block based at least on the generated sample of the first color component.

公开(公告)号：US20250063170A1

公开(公告)日：2025-02-20

申请号：US18521504

申请日：2023-11-28

Applicant: Tencent America LLC

Inventor： Xin ZHAO ,  Yushin CHO ,  Madhu PERINGASSERY KRISHNAN ,  Liang ZHAO ,  Han GAO ,  Jing YE ,  Shan LIU

IPC: H04N19/12 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

Abstract: This disclosure relates generally to video coding/decoding and particularly for a transform dictionary. A method includes receiving the coded video bitstream; determining, based on the coded video bitstream, a transform pile for the current block, the transform pile being one transform pile in a transform dictionary, the transform dictionary comprising a plurality of transform piles, and the transform pile comprising a plurality of transform sets; determining a transform set in the transform pile; determining a transform kernel in the transform set; performing an inverse transform for the current block based on the transform kernel for obtaining a residual block for the current block; and reconstructing the current block based on the residual block.

公开(公告)号：US20250055983A1

公开(公告)日：2025-02-13

申请号：US18929431

申请日：2024-10-28

Applicant: Tencent America LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/13 ,  H04N19/176

Abstract: Disclosed are methods, apparatus, and computer-readable storage medium for entropy/decoding contexts for intra prediction modes in video encoding/decoding. An example method includes receiving a video bitstream that includes a current block and deriving a first context used to entropy encode a set index based on coded information. The coded information comprises at least one of: information of the current block, and mode information of at least one neighboring block of the current block. The method further includes deriving a second context used to entropy encode a mode index for the current block based on the coded information, entropy decoding the set index according to the first context, and entropy decoding the mode index according to the second context. The method also includes determining the intra prediction mode for the current block based on the set index and the mode index.

公开(公告)号：US20250047856A1

公开(公告)日：2025-02-06

申请号：US18497662

申请日：2023-10-30

Applicant: TENCENT AMERICA LLC

Inventor： Xin ZHAO ,  Liang ZHAO ,  Jing YE ,  Han GAO ,  Yushin CHO ,  Shan LIU

IPC: H04N19/132 ,  H04N19/124 ,  H04N19/172 ,  H04N19/186 ,  H04N19/70

Abstract: This disclosure describes aspects of advanced video coding technologies and is particular related to cross-component sample offset (CCSO) filtering of reconstructed samples. For example, a quantizer for quantizing sample deltas in order to apply a CCSO filter may be constructed as an asymmetric quantizer with respect to zero sample delta. Either a symmetric or an asymmetric quantizer may be selected for processing sample deltas prior to applying a CCSO filter. An asymmetric quantizer may relate to a corresponding symmetric quantizer by a non-zero offset. Signaling of a selection of an asymmetric quantizer may be provided separately from or dependent on a signaling of a symmetric quantizer.

公开(公告)号：US20250039439A1

公开(公告)日：2025-01-30

申请号：US18497885

申请日：2023-10-30

Applicant: Tencent America LLC

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

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/136 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186

Abstract: The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current coding block of an image frame and a syntax element for a cross-component intra prediction (CCIP) mode. The CCIP mode indicates whether each chroma sample of the current coding block is determined based on one or more luma samples. An electronic device generates a plurality of hypothesis values to be used in predicting a first chroma sample by combining a plurality of neighboring luma samples of a first luma sample that is co-located with the first chroma sample using a plurality of coefficients. The first chroma sample is predicted by combining the first luma sample and the plurality of hypothesis values based on a plurality of weighing factors. The electronic device reconstructs the current coding block including the first chroma sample.