公开(公告)号：US20220321882A1

公开(公告)日：2022-10-06

申请号：US17835647

申请日：2022-06-08

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU ,  Kai ZHANG ,  Ye-kui WANG

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/186 ,  H04N19/176 ,  H04N19/174 ,  H04N19/70

Abstract: An example method of video processing includes applying, in a conversion between a video comprising multiple components and a bitstream representation of the video, a deblocking filter to video blocks of the multiple components. A deblocking filter strength for the deblocking filter of each of the multiple components is determined according to a rule that specifies to use a different manner for determining the deblocking filter strength for the video blocks of each of the multiple components.

公开(公告)号：US20220210408A1

公开(公告)日：2022-06-30

申请号：US17694253

申请日：2022-03-14

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: An example method of video processing includes determining, for a conversion between a block of a chroma component of a video and a bitstream representation of the video, whether or how to apply a filtering process to an edge of the block based on a first quantization information for a first video region comprising samples on one side of the edge and/or a second quantization information for a second video region comprising samples on the other side of the edge according to a rule that is based on a coding mode applicable to the block for coding the samples on the one side or the samples on the other side of the edge. The rule specifies that multiple QP offsets at different video unit levels are used to determine the first quantization information or the second quantization information. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220038687A1

公开(公告)日：2022-02-03

申请号：US17502233

申请日：2021-10-15

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU ,  Hsiao Chiang CHUANG

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

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：US20220286672A1

公开(公告)日：2022-09-08

申请号：US17825998

申请日：2022-05-26

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG ,  Hsiao Chiang CHUANG ,  Kui FAN

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/147

Abstract: A method of video processing is described. The method includes performing a conversion between a current block of a video and a bitstream representation of the video, wherein the current block is coded with a dictionary-based coding mode using one or more dictionaries, and wherein the conversion is based on the one or more dictionaries.

公开(公告)号：US20220272347A1

公开(公告)日：2022-08-25

申请号：US17720582

申请日：2022-04-14

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU ,  Kai ZHANG

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/186 ,  H04N19/176

Abstract: An example method of video processing includes determining, for a conversion between a chroma block of a video and a bitstream representation of the video, applicability of a deblocking filter process to at least some samples at an edge of the chroma block based on a mode of joint coding of chroma residuals for the chroma block. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220217408A1

公开(公告)日：2022-07-07

申请号：US17671422

申请日：2022-02-14

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG ,  Hsiao Chiang CHUANG

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

Abstract: Methods, systems, and devices for performing entropy coding for the palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video comprising one or more video regions comprising a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.

公开(公告)号：US20220210448A1

公开(公告)日：2022-06-30

申请号：US17694305

申请日：2022-03-14

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/70 ,  H04N19/174 ,  H04N19/117 ,  H04N19/124

Abstract: An example method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, whether to enable usage of a chroma quantization parameter (QP) offset for the current block according to a syntax element at a level of a video unit. The video unit includes the current block and a second block of the video. The method also includes performing the conversion based on the determining.

公开(公告)号：US20220210419A1

公开(公告)日：2022-06-30

申请号：US17698968

申请日：2022-03-18

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG

IPC: H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: Methods, systems, and devices for quantization parameter derivation in palette mode coding and decoding are described. An example method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, that the current block is coded using a palette mode and an escape symbol value is signaled in the bitstream representation, and performing, based on the determining, the conversion, wherein a clipped quantization parameter for the current block is used in the conversion, and wherein the clipped quantization parameter used for a chroma component of the video is derived based on a quantization parameter subsequent to a mapping operation of a quantization process or a dequantization process.

公开(公告)号：US20220038717A1

公开(公告)日：2022-02-03

申请号：US17502202

申请日：2021-10-15

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

IPC: H04N19/176 ,  H04N19/11 ,  H04N19/70 ,  H04N19/157

Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes making a decision, for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, regarding an application of an intra block copy (IBC) mode based on or inferred from at least a coding tree structure associated with the current video block; and selectively including, in the bitstream representation, a syntax element indicative of the application of the IBC mode based on or inferred from at least the coding tree structure.

公开(公告)号：US20220248063A1

公开(公告)日：2022-08-04

申请号：US17716447

申请日：2022-04-08

Applicant: Bytedance Inc.

Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU ,  Kai ZHANG

IPC: H04N19/82 ,  H04N19/186 ,  H04N19/117 ,  H04N19/70

Abstract: An example method of video processing includes making a determination, for a conversion between a current video block of a video and a bitstream representation of the video, whether a cross-component adaptive loop filtering tool is enabled for the current video block based on a color property of the video. The method also includes performing the conversion according to the determination.