公开(公告)号：US11716491B2

公开(公告)日：2023-08-01

申请号：US17696654

申请日：2022-03-16

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

Inventor： Kui Fan ,  Li Zhang ,  Kai Zhang ,  Yue Wang

IPC: H04N11/02 ,  H04N19/96 ,  H04N19/119 ,  H04N19/146 ,  H04N19/176 ,  H04N19/436 ,  H04N19/132 ,  H04N19/186 ,  H04N19/30 ,  H04N19/70

CPC classification number: H04N19/96 ,  H04N19/119 ,  H04N19/132 ,  H04N19/146 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/436 ,  H04N19/70

Abstract: Methods, systems, and devices for luma mapping with chroma scaling for video and image coding are disclosed. An example method of video processing includes performing, for a current region comprising a luma block, a first chroma block, and a second chroma block, a conversion between the current region of a video and a bitstream representation of the video according to a rule that specifies an order in which, during decoding, the first chroma block and the second chroma block are processed based on mapped sample values of the luma block.

公开(公告)号：US20230099528A1

公开(公告)日：2023-03-30

申请号：US17891800

申请日：2022-08-19

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

Inventor： Kai Zhang ,  Li Zhang ,  Ye-kui Wang ,  Zhipin Deng ,  Kui Fan ,  Jizheng Xu ,  Hongbin Liu

IPC: H04N19/129 ,  H04N19/172 ,  H04N19/169 ,  H04N19/157 ,  H04N19/70 ,  H04N19/174 ,  H04N19/119 ,  H04N19/103

Abstract: Techniques for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video picture that includes one or more tiles and one or more rectangular slices and a bitstream of the video according to a rule. The rule specifies that, for iteratively determining information about the one or more rectangular slices, a variable indicating a tile index is updated only for slices having indices that are smaller than a value equal to a number of slices in the video picture minus 1.

公开(公告)号：US11575901B2

公开(公告)日：2023-02-07

申请号：US17585788

申请日：2022-01-27

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

Inventor： Kui Fan ,  Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70 ,  H04N19/96

Abstract: A video processing method is described. The method includes performing a conversion between a video region of a video and a coded representation of the video, wherein the performing of the conversion includes configuring, based on a partition type of the video region, a context model for coding a first bin, the first bin and a second bin included in a bin string corresponding to an index of a secondary transform tool, wherein the index indicates an applicability of the secondary transform tool and/or a kernel information of the secondary transform tool, 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 to the video block before applying an inverse primary transform.

公开(公告)号：US20220394243A1

公开(公告)日：2022-12-08

申请号：US17886084

申请日：2022-08-11

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

Inventor： Zhipin Deng ,  Li Zhang ,  Kai Zhang ,  Ye-kui Wang ,  Kui Fan

IPC: H04N19/105 ,  H04N19/174 ,  H04N19/70

Abstract: Methods, apparatus, systems for video processing, including video encoding or video decoding are described. One example method includes performing a conversion between a video comprising a video picture that includes a video slice and a bitstream of the video. The bitstream conforms to a format rule specifying that, in case a slice type of the video slice is type P and temporal motion vector prediction is enabled, usage of reference picture resampling (RPR) for a reference picture in a collocated reference picture list is disabled. The reference picture is indicated by a reference index of a collocated picture of the video slice used for the temporal motion vector prediction.

公开(公告)号：US11523126B2

公开(公告)日：2022-12-06

申请号：US17696681

申请日：2022-03-16

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

Inventor： Kui Fan ,  Li Zhang ,  Kai Zhang ,  Yue Wang

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

Abstract: Methods, systems, and devices for luma mapping with chroma scaling for video and image coding are disclosed. An example method of video processing includes performing, for a current region comprising a luma block, a first chroma block, and a second chroma block, a conversion between the current region of a video and a bitstream representation of the video according to a rule that specifies an order in which, during decoding, the first chroma block and the second chroma block are processed based on mapped sample values of the luma block.

公开(公告)号：US11483579B2

公开(公告)日：2022-10-25

申请号：US17696681

申请日：2022-03-16

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

Inventor： Kui Fan ,  Li Zhang ,  Kai Zhang ,  Yue Wang

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

Abstract: Methods, systems, and devices for luma mapping with chroma scaling for video and image coding are disclosed. An example method of video processing includes performing, for a current region comprising a luma block, a first chroma block, and a second chroma block, a conversion between the current region of a video and a bitstream representation of the video according to a rule that specifies an order in which, during decoding, the first chroma block and the second chroma block are processed based on mapped sample values of the luma block.