公开(公告)号：US11496733B2

公开(公告)日：2022-11-08

申请号：US17520975

申请日：2021-11-08

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

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

IPC: H04N19/109 ,  H04N19/139 ,  H04N19/46 ,  H04N19/52 ,  H04N19/105 ,  H04N19/157 ,  H04N19/176 ,  H04N19/513

Abstract: A method of visual media processing includes determining whether to use an affine adaptive motion vector resolution (AMVR) technique on visual media data relying on a control information related to the affine AMVR technique in a bitstream representation of the visual media data, wherein the control information is included or excluded from the bitstream representation based on a rule; and performing a conversion between the visual media data and the bitstream representation of the visual media data.

公开(公告)号：US11490098B2

公开(公告)日：2022-11-01

申请号：US17538062

申请日：2021-11-30

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

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

IPC: H04N19/186 ,  H04N19/119 ,  H04N19/146 ,  H04N19/157 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: An exemplary method for visual media processing includes performing a conversion between a current video block of a visual media data and a bitstream representation of the visual media data in accordance with a conditional signaling rule, wherein the current video block is disabled from using an intra sub-block partitioning (ISP) split mode which divides the current video block into sub-blocks depending on dimensions of the current video block, wherein, in case that the conversion is associated with disabling use of the ISP split mode, the conditional signaling rule specifies selectively including in the bitstream representation a first syntax element indicating that a luma component of a sub-block of the current video block includes non-zero coefficient values, and further wherein the selectively including is based at least on one or more other syntax elements having non-zero coefficient values of one or more previous sub-blocks included in the bitstream representation.

公开(公告)号：US11483583B2

公开(公告)日：2022-10-25

申请号：US17405374

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: H04N19/513 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: Devices, systems and methods for sample refinement and filtering method for video coding are described. In an exemplary aspect, a method for video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the video, a refinement value for a prediction sample in the block by applying a clipping operation to refinement value. The refinement value is derived based on a gradient value of an optical flow coding process. An output of the clipping operation is within a range. The method also includes refining the prediction sample based on the refinement value and performing the conversion based on the refined prediction sample.

公开(公告)号：US11470331B2

公开(公告)日：2022-10-11

申请号：US17154680

申请日：2021-01-21

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

Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu ,  Yue Wang

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

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 coded using a combined inter and intra prediction (CIIP) coding technique and a bitstream representation of the video, an intra-prediction mode of the current block independently from an intra-prediction mode of a neighboring 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：US11463711B2

公开(公告)日：2022-10-04

申请号：US17201896

申请日：2021-03-15

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

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

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

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：US11457226B2

公开(公告)日：2022-09-27

申请号：US17361747

申请日：2021-06-29

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

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

IPC: H04N19/176 ,  H04N19/184 ,  H04N19/52 ,  H04N19/70 ,  H04N19/169 ,  H04N19/105 ,  H04N19/119 ,  H04N19/46 ,  H04N19/51 ,  H04N19/159 ,  H04N19/139 ,  H04N19/196 ,  H04N19/513 ,  H04N19/137 ,  H04N19/583 ,  G06T7/223 ,  G06T9/40

Abstract: A method for processing a video includes performing a determination, by a processor, that a first video block is partitioned to include a first prediction portion that is non-rectangular and non-square; adding a first motion vector (MV) prediction candidate associated with the first prediction portion to a motion candidate list associated with the first video block, wherein the first MV prediction candidate is derived from a sub-block MV prediction candidate; and performing further processing of the first video block using the motion candidate list.

公开(公告)号：US11457220B2

公开(公告)日：2022-09-27

申请号：US17343041

申请日：2021-06-09

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

Inventor： Zhipin Deng ,  Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/593 ,  H04N19/182 ,  H04N19/70 ,  H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/12 ,  H04N19/60 ,  H04N19/82 ,  H04N19/186

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 determining, for encoding a current video block of a video into a bitstream representation of the current video block, a type of neighboring samples of the current video block to be used according to a rule, and adding, based on the determining, an encoded representation of the current video block to the bitstream representation, where the current video block is encoded using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation.

公开(公告)号：US11451797B2

公开(公告)日：2022-09-20

申请号：US17011131

申请日：2020-09-03

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

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

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

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：US11438635B2

公开(公告)日：2022-09-06

申请号：US17110052

申请日：2020-12-02

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

Inventor： Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Hsiao Chiang Chuang ,  Yue Wang

IPC: H04N11/02 ,  H04N19/96 ,  H04N19/176 ,  H04N19/184 ,  H04N19/119 ,  H04N19/189 ,  H04N19/169 ,  H04N19/46

Abstract: Methods, systems and devices for using flexible and efficient partitioning techniques are described. An exemplary method for visual media decoding includes applying, to a current visual media block, a partitioning process that splits the current visual media block into more than four sub-blocks; decoding, based on a bitstream representation, the more than four sub-blocks; and decoding, based on the more than four sub-blocks and the partitioning process, the current visual media block. Another exemplary method for visual media encoding includes receiving input data associated with a current visual media block; applying, to the input data, a partitioning process that splits the current visual media block into more than four sub-blocks; encoding, based on the partitioning process, the more than four sub-blocks; and generating, based on the encoding, a bitstream representation of the current visual media block.

公开(公告)号：US11438613B2

公开(公告)日：2022-09-06

申请号：US17320033

申请日：2021-05-13

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

Inventor： Jizheng Xu ,  Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/433 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/52 ,  H04N19/593 ,  H04N19/80 ,  H04N19/96 ,  H04N19/137 ,  H04N19/517 ,  H04N19/139 ,  H04N19/82 ,  H04N19/132 ,  H04N19/159 ,  H04N19/169 ,  H04N19/423 ,  H04N19/146 ,  H04N19/117 ,  H04N19/86

Abstract: A method of visual media processing includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode; and performing a conversion between a current video block of visual media data and a bitstream representation of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.