公开(公告)号：US20220124341A1

公开(公告)日：2022-04-21

申请号：US17646196

申请日：2021-12-28

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

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/80

Abstract: Devices, systems and methods for digital video coding, which includes simplified cross-component prediction, are described. In a representative aspect, a method for video coding includes receiving a bitstream representation of a current block of video data including at least one luma component and at least one chroma component, predicting, using a linear model, a first set of samples of the at least one chroma component based on a second set of samples that is selected by sub-sampling samples of the at least one luma component, and processing, based on the first and second sets of samples, the bitstream representation to generate the current block. In another representative aspect, the second set of samples are neighboring samples of the current block and are used for an intra prediction mode of the at least one luma component.

公开(公告)号：US11310522B2

公开(公告)日：2022-04-19

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：US11303921B2

公开(公告)日：2022-04-12

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 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/132 ,  H04N19/159 ,  H04N19/30 ,  H04N19/70

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：US20220109876A1

公开(公告)日：2022-04-07

申请号：US17406260

申请日：2021-08-19

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

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

IPC: H04N19/61 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: A video processing method includes determining, for a conversion between a block of a video and a bitstream representation of the video, that an output value from an inverse secondary transform with a reduced dimension (e.g., an inverse low frequency non-separable transform) is constrained within a range of [min, max] inclusively. The inverse secondary transform is applicable to the block between a de-quantization step and an inverse primary transform. The reduced dimension is reduced from a dimension of the block, and min and max are integer values. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220109868A1

公开(公告)日：2022-04-07

申请号：US17554294

申请日：2021-12-17

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

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

IPC: H04N19/513 ,  H04N19/137 ,  G06F7/499 ,  G06F5/01 ,  H04N19/176 ,  H04N19/105

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：US20220103829A1

公开(公告)日：2022-03-31

申请号：US17546665

申请日：2021-12-09

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

Inventor： Zhipin DENG ,  Li ZHANG ,  Hongbin LIU

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176

Abstract: Restrictions on motion vector difference are disclosed. In one example method of video processing, performing a conversion between a first block of video and a bitstream representation of the first block based on a constrained signaled MVD component associated with the first block, wherein value of the signaled motion vector difference (MVD) component is constrained in a predetermined range.

公开(公告)号：US11290409B2

公开(公告)日：2022-03-29

申请号：US16939306

申请日：2020-07-27

Applicant: BYTEDANCE INC.

Inventor： Zihao Wang ,  Justin Jia-Zhao Lim

IPC: G06F3/048 ,  H04L51/42 ,  H04L51/00 ,  G06F3/0484 ,  H04L51/56

Abstract: A messaging application may receive a first input indicative of starting a conversation and a second input by a first user. The messaging application may determine that the second input is indicative of at least one attribute associated with the conversation. The messaging application may send to a messaging service data comprising information indicating a start of a new conversation and information indicating that the at least one attribute is associated with the conversation, wherein the messaging service stores in at least one database the at least one attribute associated with a thread identifier of the conversation.

公开(公告)号：US20220094987A1

公开(公告)日：2022-03-24

申请号：US17540980

申请日：2021-12-02

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

Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Zhipin DENG ,  Yang WANG ,  Yue WANG

IPC: H04N19/61 ,  H04N19/625 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: Devices, systems and methods for digital video coding, which includes using multiple transforms, are described. In a representative aspect, a method for video processing includes making a decision, based on one or more decoded coefficients and in an absence of one or more transform indices, regarding an application of a transform to a current block of a video, and performing, based on the decision, a conversion between the current block and a bitstream representation of the video.

公开(公告)号：US20220094986A1

公开(公告)日：2022-03-24

申请号：US17540089

申请日：2021-12-01

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

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

IPC: H04N19/61 ,  H04N19/70 ,  H04N19/46 ,  H04N19/176

Abstract: Devices, systems and methods for digital video process are described. An exemplary method for video processing includes performing a conversion between a current video block of a video and a coded representation of the video, wherein the performing of the conversion includes determining, based on a width (W) and/or a height (H) of the current video block, an applicability of a secondary transform tool to the current video block, and wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization of the video block before applying an inverse primary transform.

公开(公告)号：US20220094927A1

公开(公告)日：2022-03-24

申请号：US17541038

申请日：2021-12-02

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

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

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/159 ,  H04N19/139 ,  H04N19/186 ,  H04N19/105 ,  H04N19/593

Abstract: A method of video processing includes determining, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein at least one of the multiple blocks is coded using a modified intra-block copy (IBC) coding technique that uses reference samples from one or more video regions from a current picture of the current block; and performing the conversion based on the determining.