公开(公告)号：US20230156202A1

公开(公告)日：2023-05-18

申请号：US18098997

申请日：2023-01-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang MA ,  Jianle CHEN ,  Haitao YANG

IPC: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/196 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining a maximum luma value and a minimum luma value based on luma samples corresponding to neighboring samples of a target chroma block, and calculating a first difference between the maximum luma value and the minimum luma value; if the first difference is not equal to 0, processing the first difference based on a quantity of significant bits of the first difference and a first preset bit depth to obtain a second difference; and determining, based on a first chroma value, a second chroma value, and the second difference, an intra prediction model parameter corresponding to the target chroma block, and determining prediction information of the target chroma block based on the intra prediction model parameter and luma reconstruction information corresponding to the target chroma block.

公开(公告)号：US20230070282A1

公开(公告)日：2023-03-09

申请号：US17898044

申请日：2022-08-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Yin ZHAO ,  Haitao YANG ,  Jianle CHEN

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/189

Abstract: This application provides a motion vector obtaining method and apparatus. The method includes: determining a target offset vector of a block and identifier information of a target picture, wherein the block comprises at least one sub-block; determining a location of the sub-block; determining, as a target location coordinate value of a collocated sub-block, a location coordinate value obtained by performing a clipping operation on an initial location coordinate value in a range, wherein the initial location coordinate value is based on the location of the sub-block and the target offset vector; and obtaining a motion vector of the sub-block based on a motion vector corresponding to the target location coordinate value. Thus, a range of the target offset vector is limited, so that a quantity of memory read times can be reduced in a process of obtaining the motion vector of the collocated sub-block.

公开(公告)号：US20220345739A1

公开(公告)日：2022-10-27

申请号：US17858567

申请日：2022-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang CHEN ,  Xiang MA ,  Haitao YANG ,  Jianle CHEN

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: This application provides a video picture prediction method and apparatus, to resolve a problem in a conventional technology that a length of a coded video sequence is increased. The first type of identifier may be added to a bitstream. The first type of identifier is used to indicate whether an affine motion model-based inter prediction mode is enabled for a video picture. For a video picture or a picture block included in the slice for which the affine motion model does not need to be used, a parameter, related to the affine motion model, of the picture block may not need to be transmitted. On a decoder side, during decoding of the picture block, the parameter related to the affine motion model does not need to be parsed. This can reduce load of a decoder, increase a processing speed, and decrease a processing time.

公开(公告)号：US20220329788A1

公开(公告)日：2022-10-13

申请号：US17843798

申请日：2022-06-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin ZHAO ,  Haitao YANG ,  Jianle CHEN ,  Lian ZHANG

IPC: H04N19/107 ,  H04N19/157 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image prediction method, apparatus, and system, a device, and a storage medium are provided. The method includes: (401) obtaining a split mode of a current node, where the current node is an image block in a coding tree unit in a current image; (402) determining, based on the split mode of the current node and a size of the current node, whether the current node satisfies a first condition; and (403) when it is determined that the current node satisfies the first condition, performing intra prediction on all coding blocks belonging to the current node, to obtain predictors of all the coding blocks belonging to the current node.

公开(公告)号：US20220321921A1

公开(公告)日：2022-10-06

申请号：US17836337

申请日：2022-06-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Roman Igorevich CHERNYAK ,  Timofey Mikhailovich SOLOVYEV ,  Sergey Yurievich IKONIN ,  Alexander Alexandrovich KARABUTOV ,  Jianle CHEN

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/107 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184

Abstract: The present disclosure relates to methods and apparatuses for encoding video data into a bitstream and for decoding video data received in a bitstream. A second control flag indicating whether or not to use multi-hypothesis prediction for intra and inter mode is generated and transmitted only conditionally, upon a determination whether or not separate merge list technique for subblock merge candidates is used. On the other hand, a decoder is capable of deciding usage of multi-hypothesis prediction for intra and inter mode and separate merge list technique for subblock merge candidates even though the second control flag is transmitted only conditionally.

公开(公告)号：US20220007052A1

公开(公告)日：2022-01-06

申请号：US17447952

申请日：2021-09-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich FILIPPOV ,  Vasily Alexeevich RUFITSKIY ,  Biao WANG ,  Semih ESENLIK ,  Jianle CHEN

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/176

Abstract: Devices and methods for intra prediction of DC intra prediction mode are provided. The method includes: obtaining a value of an intra prediction reference line index of a transform block; obtaining prediction samples of the transform block based on reference samples from a reference line. The reference line is indexed by the value of the intra prediction reference line index. The method introduces a harmonization of MRL and non-directional intra prediction (i.e. DC). The harmonization consists of aligning the reference samples from a reference line, which is indexed by the value of the intra prediction reference line index.

公开(公告)号：US20210385440A1

公开(公告)日：2021-12-09

申请号：US17407554

申请日：2021-08-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Konstantinovich FILIPPOV ,  Vasily Alexeevich RUFITSKIY ,  Jianle CHEN

IPC: H04N19/105 ,  H04N19/117 ,  H04N19/136 ,  H04N19/186 ,  H04N19/196

Abstract: The present invention relates to the field of picture processing. Especially, the invention deals with improving intra prediction (such as the chroma intra prediction) using a cross component linear model (CCLM) and more particularly to spatial filtering used in cross-component linear model for intra prediction with different chroma formats. An apparatus, an encoder, a decoder and corresponding methods for cross-component prediction for a picture, in which the set of down-sampling filters applied during the prediction depends on a chroma format, that may be one of multiple supported chroma formats are provided, so as to improve coding efficiency.

公开(公告)号：US20210377564A1

公开(公告)日：2021-12-02

申请号：US17396395

申请日：2021-08-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich FILIPPOV ,  Vasily Alexeevich RUFITSKIY ,  Jianle CHEN

IPC: H04N19/593 ,  H04N19/176 ,  H04N19/172 ,  H04N19/184 ,  H04N19/186

Abstract: A method determines an intra-prediction mode for decoding a block of a picture encoded in a bitstream. The method includes: inferring a value of an intra-prediction mode of the block to a value indicating a non-angular mode in a case where prediction information associated with the block indicates that the intra-prediction mode is not an angular mode and that intra-sub-partitioning is applied to the block.

公开(公告)号：US20210352277A1

公开(公告)日：2021-11-11

申请号：US17379601

申请日：2021-07-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich FILIPPOV ,  Vasily Alexeevich RUFITSKIY ,  Jianle CHEN

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

Abstract: Embodiments provide methods and apparatus for illumination compensation for inter prediction coding of a picture, e.g. for video encoding and decoding. The methods may comprise: obtaining inter-predicted sample values for a current block of the picture; obtaining a first target value (xA) and a second target value (xB) of neighboring samples from a set L of neighboring samples of a reference block, wherein said set L comprises neighboring samples of at least one reference block of the current block, and obtaining corresponding positions A of the sample having the first target value and B of the sample having the second target value relative to the position of the reference block; obtaining respective values of neighboring samples (yA, yB) of the current block at the obtained positions A and B relative to the position of the current block; obtaining values of updating parameters using the calculated values; and updating the values of the inter-predicted samples based on the updating parameters.

公开(公告)号：US20210337211A1

公开(公告)日：2021-10-28

申请号：US17370151

申请日：2021-07-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao WANG ,  Anand Meher KOTRA ,  Semih ESENLIK ,  Jianle CHEN ,  Han GAO

IPC: H04N19/159 ,  H04N19/61 ,  H04N19/139 ,  H04N19/105 ,  H04N19/117

Abstract: The present disclosure provides a coding method, wherein the coding includes decoding or encoding, and the method comprises determining whether a current coding unit is predicted by application of combined inter-intra prediction (CIIP); and in response to determining that the current coding unit is predicted by application of CIIP, setting a boundary strength of a boundary of the current coding unit to a first value.