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：US20220078452A1

公开(公告)日：2022-03-10

申请号：US17529607

申请日：2021-11-18

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

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

IPC: H04N19/176 ,  H04N19/107 ,  H04N19/583 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119

Abstract: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.

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：US20220070459A1

公开(公告)日：2022-03-03

申请号：US17522347

申请日：2021-11-09

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

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

IPC: H04N19/122 ,  H04N19/105 ,  H04N19/157 ,  H04N19/192 ,  H04N19/70 ,  H04N19/176

Abstract: A method of visual processing includes determining, during a conversion between a block of a video and a bitstream representation of the video, whether there is a switch from a first residual coding technique to a second residual coding technique based on a number of context coded bins per unit used in the first residual coding technique. The unit is included in the block, and coefficients of the unit are coded in the bitstream representation in multiple passes. The method also includes performing the conversion based on the determining.

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：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：US20210392341A1

公开(公告)日：2021-12-16

申请号：US17412771

申请日：2021-08-26

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

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

IPC: H04N19/176 ,  H04N19/107 ,  H04N19/583 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/105 ,  H04N19/117 ,  H04N19/119

Abstract: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.

公开(公告)号：US20210377561A1

公开(公告)日：2021-12-02

申请号：US17403707

申请日：2021-08-16

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

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

IPC: H04N19/52 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/51 ,  H04N19/593

Abstract: The present disclosure relate to interaction between intra block copy mode and inter prediction tools A method for video processing is provided, including: determining that an Intra-Block-Copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, at least one reference picture used by the current video block is a current picture where the current video block is located in; making a decision regarding a disabling of a specific coding mode for the current block; performing, based on the decision, a conversion between the current video block and the bitstream representation; wherein the specific coding mode uses a motion vector and a non-current picture to derive a prediction of a video block.

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.