公开(公告)号：US20210297674A1

公开(公告)日：2021-09-23

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: H04N19/139 ,  H04N19/105 ,  H04N19/52 ,  H04N19/176

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：US20210281876A1

公开(公告)日：2021-09-09

申请号：US17331017

申请日：2021-05-26

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

Inventor： Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/105 ,  H04N19/184 ,  H04N19/186 ,  H04N19/117

Abstract: A method for video processing is provided to include performing, for a conversion between a current video block of a video and a coded representation of the video, a motion information refinement process based on samples in a first domain or a second domain; and performing the conversion based on a result of the motion information refinement process, wherein, during the conversion, the samples are obtained for the current video block from a first prediction block in the first domain using an unrefined motion information, at least a second prediction block is generated in the second domain using a refined motion information used for determining a reconstruction block, and reconstructed samples of the current video block are generated based on the at least the second prediction block.

公开(公告)号：US20210274167A1

公开(公告)日：2021-09-02

申请号：US17322579

申请日：2021-05-17

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

Inventor： Hongbin LIU ,  Li ZHANG ,  Kai ZHANG ,  Jizheng XU ,  Yue WANG ,  Na ZHANG

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/58

Abstract: The present application relates to extended application of combined intra-inter prediction. A method for processing video includes: storing a combined inter-intra prediction (CIIP) flag and/or intra mode of the CIIP mode with motion information in a history-based motion vector prediction (HMVP) table; and performing, at least based on the HMVP table, a conversion between a current block in a video data and a bitstream representation of the current block.

公开(公告)号：US20210266591A1

公开(公告)日：2021-08-26

申请号：US17319950

申请日：2021-05-13

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/52 ,  H04N19/167 ,  H04N19/196 ,  H04N19/176 ,  H04N19/105

Abstract: Pruning method for History-based affine parameters is described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a current block of video and a bitstream representation of the current block, a first set of affine parameters associated with affine model for the current block; comparing the first set of affine parameters to one or more of sets of affine parameters stored in a buffer for storing affine parameters so as to determine whether the first set of affine parameters is same or similar to at least one set of affine parameters; and deciding whether or how to update the buffer for storing affine parameters based on the determination.

公开(公告)号：US20210211681A1

公开(公告)日：2021-07-08

申请号：US17201711

申请日：2021-03-15

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/149 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/593 ,  H04N19/159 ,  H04N19/11 ,  H04N19/50

Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, parameters of a cross-component linear model that are completely determinable by two chroma samples and corresponding two luma samples; and performing the conversion based on the determining.

公开(公告)号：US20210152816A1

公开(公告)日：2021-05-20

申请号：US17161106

申请日：2021-01-28

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/105 ,  H04N19/189 ,  H04N19/159 ,  H04N19/176

Abstract: Devices, systems and methods for digital video coding, which include sub-block based inter prediction methods, are described. An exemplary method for video processing includes determining, for a conversion between a current block of video and a bitstream representation of the video, a maximum number of candidates in a sub-block based merge candidate list and/or whether to add sub-block based temporal motion vector prediction (SbTMVP) candidates to the sub-block based merge candidate list based on whether temporal motion vector prediction (TMVP) is enabled for use during the conversion or whether a current picture referencing (CPR) coding mode is used for the conversion, and performing, based on the determining, the conversion.

公开(公告)号：US20210144392A1

公开(公告)日：2021-05-13

申请号：US17154795

申请日：2021-01-21

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/186 ,  H04N19/159 ,  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 of a block of a video that is coded using an inter-intra prediction coding technique and a bitstream representation of the video, a prediction value at a position in the block based on a weighted sum of an inter prediction value and an intra prediction value at the position. The weighted sum is based on adding an offset to an initial sum obtained based on the inter prediction value and the intra prediction value. The offset is added prior to a right-shift operation performed to determine the weighted sum. The method also includes performing the conversion based on the determining.

公开(公告)号：US20210144388A1

公开(公告)日：2021-05-13

申请号：US17154736

申请日：2021-01-21

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/117 ,  H04N19/105

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, whether a combined inter and intra prediction (CIIP) coding technique is to be applied to the current block based on a characteristic of the current block. The CIIP coding technique uses an intermedia inter prediction value and an intermedia intra prediction value to derive a final prediction value of the current block. The method also includes performing the conversion based on the determining.

公开(公告)号：US20210092379A1

公开(公告)日：2021-03-25

申请号：US17115462

申请日：2020-12-08

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

Inventor： Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176

Abstract: Devices, systems and methods for digital video coding, which includes using default motion candidates for video coding, are described. An exemplary method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, one or more motion candidates for a geometry partition mode using one or more pairwise average candidates that are obtained by averaging a pair of candidates in a motion candidate list for the current block. The geometry partition mode includes partitioning the current block into multiple partitions. The method also includes performing the conversion based on the determining.

公开(公告)号：US20210029352A1

公开(公告)日：2021-01-28

申请号：US17071590

申请日：2020-10-15

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

Inventor： Li ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Jizheng XU ,  Yue WANG

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/117 ,  H04N19/82 ,  H04N19/96 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: Devices, systems and methods for digital video coding, which include pulse code modulation techniques, are described. An exemplary method for video processing includes determining, for a current block of video, that at least one of a first coding mode in which pulse code modulation is used or a second coding mode in which multiple reference line based intra prediction is used is enabled, and performing, based on the first coding mode or the second coding mode, a conversion between the current block and a bitstream representation of the video, wherein a first indication indicative of use of the first coding mode and/or a second indication indicative of use of the second coding mode are included in the bitstream representation according to an ordering rule.