公开(公告)号：US11943459B2

公开(公告)日：2024-03-26

申请号：US18066863

申请日：2022-12-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao Wang ,  Semih Esenlik ,  Anand Meher Kotra ,  Elena Alexandrovna Alshina ,  Han Gao

IPC: H04N19/31 ,  H04N19/136 ,  H04N19/187 ,  H04N19/70 ,  H04N19/119 ,  H04N19/176

CPC classification number: H04N19/31 ,  H04N19/136 ,  H04N19/187 ,  H04N19/70 ,  H04N19/119 ,  H04N19/176

Abstract: Signalling of syntax elements in a sequence parameter set of a video bitstream is addressed. Particularly, it is provided a method of decoding a video bitstream wherein a sequence parameter set, SPS, is coded that contains syntax elements that apply to a video sequence, the method comprising obtaining a value of a first syntax element from the SPS used to specify whether a decoded picture buffer, DPB, parameters syntax structure is present in the SPS and obtaining a value of a second syntax element from the SPS, at least when determining that the value of the first syntax element specifies that the DPB parameters syntax structure is present in the SPS, used to specify the presence of a DPB syntax element in the DPB parameters syntax structure, wherein the DPB syntax element is applied to a temporal sublayer except for the highest temporal sublayer in the video sequence.

公开(公告)号：US11909978B2

公开(公告)日：2024-02-20

申请号：US17586116

申请日：2022-01-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Zhijie Zhao ,  Han Gao

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/82 ,  H04N19/132

CPC classification number: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: A deblocking filter of an image processing device is provided. The deblocking filter is used in an image coding process, for deblocking a block edge between a first coding block and a second coding block of an image. The first block has SA samples perpendicular to the block edge by N samples parallel to the block edge, and the second block has SB samples perpendicular to the block edge by N samples parallel to the block edge. No more than IA samples of the first coding block are used as first filter input values, and no more than IB samples of the second coding block are used as second filter input values. No more than MA samples of the first coding block are modified as first filter output values, and no more than MB samples of the second coding block are modified as second filter output values.

公开(公告)号：US11909959B2

公开(公告)日：2024-02-20

申请号：US17324401

申请日：2021-05-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Timofey Mikhailovich Solovyev ,  Semih Esenlik ,  Jianle Chen ,  Anand Meher Kotra ,  Biao Wang ,  Han Gao

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/107

CPC classification number: H04N19/107 ,  H04N19/119 ,  H04N19/176

Abstract: The present disclosure provides methods and devices of processing a block according to a merge candidate list, the method comprising: constructing a first list according to motion information of neighboring blocks of a current block; obtaining prediction information of the current block; when the prediction information of the current block indicates that a sub-block prediction is applied to the current block, obtaining a uni-prediction candidate for the current block according to the first list; using, the uni-prediction candidate for the current block to perform inter prediction of the current block. According to embodiment of the present disclosure, the regular merge list can be directly used and there is no need to explicitly generate the uni-prediction merge candidate list for sub-block prediction.

公开(公告)号：US11870986B2

公开(公告)日：2024-01-09

申请号：US18071578

申请日：2022-11-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Anand Meher Kotra ,  Semih Esenlik ,  Jianle Chen ,  Han Gao ,  Biao Wang ,  Zhijie Zhao

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82 ,  H04N19/96

CPC classification number: H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82 ,  H04N19/96

Abstract: A method of filtering a sample value of a picture is provided, with an integer t that is less than k and with an integer j in the range of 1 to m: generating, with an integer i in the range of 1 to k−t−1, a filtered sample value by applying a filter to the value of the sample p(i,j), wherein the filter is supported by a set of filter support samples, the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ greater than k−t−1, and/or generating, with an integer i in the range of k−t to k, a filtered sample value by applying a filter to the value of the sample p(i,j), the filter is supported by a set of filter support samples, wherein the set of filter support samples does not comprise any samples p(i′,j′) with row index i′ less than k−t.

公开(公告)号：US11843806B2

公开(公告)日：2023-12-12

申请号：US17383639

申请日：2021-07-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao Wang ,  Anand Meher Kotra ,  Han Gao ,  Yin Zhao ,  Semih Esenlik ,  Jianle Chen

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/176 ,  H04N19/503 ,  H04N19/61

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/176 ,  H04N19/503 ,  H04N19/61

Abstract: A deblocking method, for deblocking a transform block boundary within a coding block in an image encoding and/or an image decoding is provided, wherein the coding block comprising transform blocks is coded in inter prediction mode and the transform blocks comprises a first transform block and a second transform block; wherein the method comprises: determining, when the boundary between the first transform block and the second transform block is a transform block boundary and at least one of the first transform block and the second transform block has one or more non-zero transform coefficients, a value of a BS parameter for the boundary between the first transform block and the second transform block to be a first value; and performing de-blocking filtering process to the boundary between the first transform block and the second transform block at least based on the value of the boundary strength parameter.

公开(公告)号：US20230336776A1

公开(公告)日：2023-10-19

申请号：US18320222

申请日：2023-05-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Han Gao ,  Elena Alexandrovna Alshina ,  Semih Esenlik

IPC: H04N19/59

CPC classification number: H04N19/59

Abstract: The present disclosure relates to video encoding and decoding, and in particular to handling of chroma subsampled formats in machine-learning-based video coding. Corresponding apparatuses and methods enable the processing for encoding and decoding of a respective picture portion that includes a luma component and a chroma component with a resolution lower than the luma component. In order to handle such different sized luma-chroma channels, the chroma component is up-sampled such that the obtained up-sampled chroma component has a resolution matching the one of the luma component. The luma and the up-sampled chroma component are then encoded into a bitstream. To reconstruct the picture portion, the luma component and an intermediate chroma component matching the resolution of the luma component are decoded from the bitstream, followed by down-sampling the intermediate chroma component. Thus, sub-sampled chroma formats may be handled by an autoencoder/autodecoder framework, while preserving the luma channel.

公开(公告)号：US11750835B2

公开(公告)日：2023-09-05

申请号：US17172088

申请日：2021-02-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Semih Esenlik ,  Han Gao ,  Jianle Chen ,  Anand Meher Kotra ,  Biao Wang

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/56 ,  H04N19/96

CPC classification number: H04N19/52 ,  H04N19/176 ,  H04N19/56 ,  H04N19/96

Abstract: An apparatus and method for marking availability of a candidate coding block for merge estimation of a current coding block within a coding tree unit, CTU, which includes multiple coding blocks. Initially, the candidate coding block is marked as available. The candidate coding block is marked as unavailable when a predefined location of the candidate coding block is included within an extended merge estimation region, MER. The extended MER includes a current MER in which the current coding block is located and at least a portion of another MER, adjacent to the current MER.

公开(公告)号：US20230254485A1

公开(公告)日：2023-08-10

申请号：US18162439

申请日：2023-01-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Han Gao ,  Semih Esenlik ,  Biao Wang ,  Anand Meher Kotra ,  Jianle Chen

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/625 ,  H04N19/70

CPC classification number: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/625 ,  H04N19/70

Abstract: The present disclosure provides methods and devices. A video method of coding implemented by a decoding device, comprising: when a prediction mode of a current coding block is intra prediction, and the current coding block is processed by using Intra sub-partition coding mode, determining whether a width of a current transform block is larger than or equal to a first threshold or not, and whether the width of the current transform block is smaller than or equal to a second threshold or not, the current transform block corresponding to the current coding block; when the width of the current transform block is larger than or equal to the first threshold and the width of the current transform block is smaller than or equal to the second threshold, performing transform process on the current transform block, wherein a transform core based on DST 7 is used on horizontal direction transform.

公开(公告)号：US20230125381A1

公开(公告)日：2023-04-27

申请号：US18146372

申请日：2022-12-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Timofey Mikhailovich SOLOVYEV ,  Semih Esenlik ,  Jianle Chen ,  Anand Meher Kotra ,  Han Gao ,  Biao Wang ,  Roman Igorevich Chernyak ,  Alexander Alexandrovich Karabutov ,  Sergey Yurievich Ikonin

IPC: H04N19/503 ,  H04N19/105 ,  H04N19/13 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A prediction method for an image block comprising a first prediction sub-block and a second prediction sub-block, the prediction method comprising: parsing a first index from a bitstream, wherein the first index is used to obtain prediction information of the first prediction sub-block; parsing a second index from the bitstream; comparing the first index with the second index; adjusting the second index in the event that the second index is equal to or greater than the first index; and obtaining prediction information of the second prediction sub-block according to the adjusted second index.

公开(公告)号：US11582477B2

公开(公告)日：2023-02-14

申请号：US17849405

申请日：2022-06-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih Esenlik ,  Anand Meher Kotra ,  Zhijie Zhao ,  Han Gao

IPC: H04N19/513 ,  H04N19/57

Abstract: The present disclosure relates to motion vector refinement. As a first step, an initial motion vector and a template for the block are obtained. Then, the refinement of the initial motion vector is determined by template matching with said template in a search space. The search space is located on a position given by the initial motion vector and includes one or more fractional sample positions, wherein each of fractional sample positions belonging to the search space is obtained by interpolation filtering with a filter of a predefined tap-size assessing integer samples only within a window, said window being formed by integer samples accessible for the template matching in said search space.