公开(公告)号：US20220109885A1

公开(公告)日：2022-04-07

申请号：US17546621

申请日：2021-12-09

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

Inventor： Zhipin DENG ,  Li ZHANG ,  Hongbin LIU ,  Kai ZHANG ,  Jizheng XU

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

Abstract: A method for visual media processing includes processing a bitstream representation for a conversion between a current video block in a video region of a visual media data and the bitstream representation. The bitstream representation is based on a rule that specifies that one or more syntax elements used in a luma-dependent chroma residual scaling step are selectively included in the bitstream representation. The luma-dependent chroma residual scaling step includes scaling chroma samples based on neighboring reconstructed luma samples during the conversion. The one or more syntax elements are usable to derive a chroma residual scaling factor used for the scaling.

公开(公告)号：US20220109852A1

公开(公告)日：2022-04-07

申请号：US17551392

申请日：2021-12-15

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

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

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/159 ,  H04N19/96 ,  H04N19/593

Abstract: Interaction between screen content coding tools and motion information is disclosed. A method of video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the block, at least one of motion information associated with the block which is coded with intra block copy (IBC) mode; and performing the conversion based on the modified motion information.

公开(公告)号：US20220103815A1

公开(公告)日：2022-03-31

申请号：US17361837

申请日：2021-06-29

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

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

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82 ,  H04N19/174 ,  H04N19/31 ,  H04N19/70

Abstract: Devices, systems and methods for digital video coding, which includes in-loop reshaping for video coding, are described. An exemplary method for video processing includes performing a conversion between a video comprising one or more video data units and a bitstream representation of the video, the bitstream representation conforming to a format rule that specifies an inclusion of side information indicative of default parameters for a coding mode that is applicable to a video block of the one or more video data units for which the coding mode is enabled, and the side information providing parameters for constructing the video block based on a representation of the video block in an original domain and a reshaped domain and/or a luma-dependent scaling of a chroma residue of a chroma video block.

公开(公告)号：US20220086447A1

公开(公告)日：2022-03-17

申请号：US17532491

申请日：2021-11-22

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

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: Combined intra and intra-block copy prediction for video coding is disclosed. A video processing method includes generating, for a conversion between a block of a video and a bitstream representation of the block, prediction for the block with a combined method which uses intra block copy (IBC) prediction and intra prediction in combination; and performing the conversion based on the prediction.

公开(公告)号：US20220070485A1

公开(公告)日：2022-03-03

申请号：US17523286

申请日：2021-11-10

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

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

IPC: H04N19/513 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/51 ,  H04N19/517

Abstract: A method for video processing is provided to include: determining a motion vector precision of one or more motion vectors related to a current video block of a video; selecting, based on the motion vector precision, a motion vector range; and performing, based on the motion vector range, a conversion between the current video block and a bitstream representation of the video.

公开(公告)号：US20220060745A1

公开(公告)日：2022-02-24

申请号：US17453135

申请日：2021-11-01

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

Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU

IPC: H04N19/59 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/40 ,  H04N19/105 ,  H04N19/132 ,  H04N19/70

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 whether a luma video block of a video is coded using a matrix based intra prediction (MIP) mode; performing a second determination that the luma video block is applicable for determining a chroma intra mode for a current chroma video block of the video; performing, based on the first determination and the second determination, a third determination about the chroma intra mode to be used for the current chroma video block; and performing, based on the third determination, a conversion between the current chroma video block and a bitstream representation of the current chroma video block.

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：US20220014783A1

公开(公告)日：2022-01-13

申请号：US17478511

申请日：2021-09-17

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

Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/117 ,  H04N19/105 ,  H04N19/132 ,  H04N19/184

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 conversion between a current video block of a video and a bitstream representation of the current video block using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on reference boundary samples located to a left of the current video block and located to a top of the current video block, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, where instead of reduced boundary samples calculated from the reference boundary samples of the current video block in the boundary downsampling operation, the reference boundary samples are directly used for a prediction process in the upsampling operation.

公开(公告)号：US20220014761A1

公开(公告)日：2022-01-13

申请号：US17483570

申请日：2021-09-23

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

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

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/107 ,  H04N19/186 ,  H04N19/577 ,  H04N19/96

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：US20210377559A1

公开(公告)日：2021-12-02

申请号：US17401438

申请日：2021-08-13

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

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

IPC: H04N19/513 ,  H04N19/137 ,  H04N19/46 ,  H04N19/176

Abstract: One example method of video processing includes implementing, by a processor, a decoder-side motion vector derivation (DMVD) scheme for motion vector refinement during a conversion between a current video block and a bitstream representation of the current video block by deriving parameters based on a deriving rule. The conversion may include compressing the current video block into the bitstream representation or uncompressing the bitstream representation into pixel values of the current video block.