公开(公告)号：US11463702B2

公开(公告)日：2022-10-04

申请号：US17343980

申请日：2021-06-10

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Zhipin Deng ,  Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/12 ,  H04N19/60 ,  H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/186

Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a first determination that a luma video block of a video is coded using a matrix based intra prediction (MIP) mode in which a prediction block of the luma video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, performing, based on the first determination, a second determination about a chroma intra mode to be used for a chroma video block associated with the luma video block, and performing, based on the second determination, a conversion between the chroma video block and a bitstream representation of the chroma video block.

公开(公告)号：US11445210B2

公开(公告)日：2022-09-13

申请号：US17405179

申请日：2021-08-18

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Hongbin Liu ,  Li Zhang ,  Kai Zhang ,  Jizheng Xu ,  Yue Wang

IPC: H04N19/105 ,  H04N19/513 ,  H04N19/176 ,  H04N19/132

Abstract: A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.

公开(公告)号：US11445182B2

公开(公告)日：2022-09-13

申请号：US17384246

申请日：2021-07-23

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Jizheng Xu ,  Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/176 ,  H04N19/423 ,  H04N19/593 ,  H04N19/105

Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.

公开(公告)号：US11431994B2

公开(公告)日：2022-08-30

申请号：US17479192

申请日：2021-09-20

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Zhipin Deng ,  Li Zhang ,  Hongbin Liu ,  Kai Zhang ,  Jizheng Xu

IPC: H04N19/30 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/132 ,  H04N19/70 ,  H04N19/146 ,  H04N19/196 ,  H04N19/96

Abstract: A method for visual media processing, including performing a conversion between a current chroma chroma block of visual media data and a bitstream representation of the current chroma chroma block, wherein, during the conversion, a chroma residual of the current chroma chroma block is scaled based on a scaling coefficient, wherein the scaling coefficient is derived at least based on luma samples located in predefined positions.

公开(公告)号：US11431966B2

公开(公告)日：2022-08-30

申请号：US17502233

申请日：2021-10-15

Applicant: Bytedance Inc.

Inventor： Weijia Zhu ,  Li Zhang ,  Jizheng Xu ,  Hsiao Chiang Chuang

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/70

Abstract: Video coding and decoding methods are described. In example method includes performing a conversion between a current video block of a video and a bitstream representation of the current video block by determining a first intra coding mode to be stored which is associated with the current video block using a differential coding mode, where the first intra coding mode associated with the current video block is determined according to a second prediction mode used by the differential coding mode, and where, in the differential coding mode, a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual is represented in the bitstream representation for the current video block using a differential pulse coding modulation (DPCM) representation.

公开(公告)号：US11425406B2

公开(公告)日：2022-08-23

申请号：US17356220

申请日：2021-06-23

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Hongbin Liu ,  Li Zhang ,  Kai Zhang ,  Jizheng Xu ,  Yue Wang ,  Na Zhang

IPC: H04N19/159 ,  H04N19/126 ,  H04N19/176 ,  H04N19/46 ,  H04N19/105 ,  H04N19/107 ,  H04N19/513 ,  H04N19/58 ,  H04N19/96

Abstract: The present application relates to improved weighting processing of combined intra-inter prediction. A method for processing video includes: determining, during a conversion between a current video block, which is coded in a combined intra and inter prediction (CIIP) mode, of a video and a bitstream representation of the current video block, a weight pair comprising a first weight for a first prediction result of the current video block and a second weight for a second prediction result of the current video block, based on one or more neighboring video blocks to the current video block, wherein the first prediction result is generated by an intra prediction mode and the second prediction result is generated by an inter prediction mode; and determining a prediction result of the current block based on a weighted sum of the first prediction result and the second prediction result.

公开(公告)号：US11412214B1

公开(公告)日：2022-08-09

申请号：US17406284

申请日：2021-08-19

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Zhipin Deng ,  Li Zhang ,  Hongbin Liu ,  Kai Zhang ,  Jizheng Xu

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  H04N19/30

Abstract: A method for visual media processing, including: computing, during a conversion between a current video block of visual media data and a bitstream representation of the current video block, a cross-component linear model (CCLM) and/or a chroma residual scaling (CRS) factor for the current video block based, at least in part, on neighboring samples of a corresponding luma block which covers a top-left sample of a collocated luma block associated with the current video block, wherein one or more characteristics of the current video block are used for identifying the corresponding luma block.

公开(公告)号：US11350116B2

公开(公告)日：2022-05-31

申请号：US17320033

申请日：2021-05-13

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Jizheng Xu ,  Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/433 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/52 ,  H04N19/593 ,  H04N19/80 ,  H04N19/96 ,  H04N19/137 ,  H04N19/517 ,  H04N19/139 ,  H04N19/82 ,  H04N19/132 ,  H04N19/159 ,  H04N19/169 ,  H04N19/423 ,  H04N19/146 ,  H04N19/117 ,  H04N19/86

Abstract: A method of visual media processing includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode; and performing a conversion between a current video block of visual media data and a bitstream representation of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.

公开(公告)号：US11343527B1

公开(公告)日：2022-05-24

申请号：US17356275

申请日：2021-06-23

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu ,  Yue Wang

IPC: H04N19/513 ,  H04N19/186 ,  H04N19/176

Abstract: Techniques for implementing video processing techniques are described. In one example implementation, a method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, a modified motion vector set; and performing the conversion based on the modified motion vector set. Due to the current block satisfying a condition, the modified motion vector set is a modified version of a motion vector set associated with the current block.

公开(公告)号：US11343505B2

公开(公告)日：2022-05-24

申请号：US17322166

申请日：2021-05-17

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Jizheng Xu ,  Yue Wang

IPC: H04N19/132 ,  H04N19/30 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video that is a chroma block and a coded representation of the video, wherein, during the conversion, the current video block is constructed based on a first domain and a second domain, and wherein the conversion further includes applying a forward reshaping process and/or an inverse reshaping process to one or more chroma components of the current video block.