公开(公告)号：US20250080738A1

公开(公告)日：2025-03-06

申请号：US18946010

申请日：2024-11-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Semih ESENLIK ,  Biao WANG ,  Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA

IPC: H04N19/129 ,  H04N19/169 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70

Abstract: A method of decoding of a picture from a video bitstream is disclosed. The video bitstream includes a slice header of a current slice and data representing the current slice. The method comprises: obtaining a parameter used to derive a number of tiles in the current slice from the slice header when a slice address of the current slice is not an address of a last tile in the picture where the current slice located; and reconstructing the current slice using the number of tiles in the current slice and the data representing the current slice.

公开(公告)号：US20240406404A1

公开(公告)日：2024-12-05

申请号：US18795684

申请日：2024-08-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Han GAO ,  Semih ESENLIK ,  Elena Alexandrovna ALSHINA ,  Biao WANG ,  Anand Meher KOTRA

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: A motion information storing method comprises: determining a distance between a sample set in the current block and the common boundary; and comparing the distance with a threshold to determine whether third motion information is stored for the sample set, wherein the third motion information is derived by the first motion information and the second motion information.

公开(公告)号：US20240373025A1

公开(公告)日：2024-11-07

申请号：US18764687

申请日：2024-07-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao WANG ,  Semih ESENLIK ,  Anand Meher KOTRA ,  Han GAO ,  Elena Alexandrovna ALSHINA

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

Abstract: A method of coding implemented by a decoding device, comprising obtaining a video bitstream; decoding the video bitstream to obtain an initial intra prediction mode value for chroma component of a current coding block; determining whether a ratio between a width for luma component of the current coding block and a width for chroma component of the current coding block is equal to a threshold or not; obtaining a mapped intra prediction mode value for chroma component of the current coding block according to a predefined mapping relationship and the initial intra prediction mode value, when it's determined that the ratio is equal to the threshold; obtaining a prediction sample value for chroma component of the current coding block according to the mapped intra prediction mode value.

公开(公告)号：US20240283956A1

公开(公告)日：2024-08-22

申请号：US18440003

申请日：2024-02-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao WANG ,  Semih ESENLIK ,  Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA ,  Han GAO

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

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：US20230291904A1

公开(公告)日：2023-09-14

申请号：US18319174

申请日：2023-05-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih ESENLIK ,  Biao WANG ,  Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA

IPC: H04N19/129 ,  H04N19/174 ,  H04N19/176 ,  H04N19/169

CPC classification number: H04N19/129 ,  H04N19/174 ,  H04N19/176 ,  H04N19/1883 ,  H04N19/70

Abstract: A method of decoding of a picture from a video bitstream is disclosed. The video bitstream includes a slice header of a current slice and data representing the current slice. The method comprises: obtaining a parameter used to derive a number of tiles in the current slice from the slice header when a slice address of the current slice is not an address of a last tile in the picture where the current slice located; and reconstructing the current slice using the number of tiles in the current slice and the data representing the current slice.

公开(公告)号：US20230019544A1

公开(公告)日：2023-01-19

申请号：US17858700

申请日：2022-07-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Timofey Mikhailovich SOLOVYEV ,  Maxim Borisovitch SYCHEV ,  Roman Igorevich CHERNYAK ,  Alexander Alexandrovich KARABUTOV ,  Sergey Yurievich IKONIN ,  Elena Alexandrovna ALSHINA

IPC: H04N19/52 ,  H04N19/55 ,  H04N19/139 ,  H04N19/176 ,  H04N19/105 ,  H04N19/172 ,  H04N19/182

Abstract: A method for coding video data is disclosed. The method comprises: obtaining a center motion vector of a coding block; deriving a first motion vector range for the coding block based on the center motion vector and a motion vector spread, wherein the motion vector spread depends on a size of the coding block; if the first motion vector range is at least partially pointing outside a first area including a reference picture, updating the first motion vector range to point within the first area, such that a minimum value or a maximum value of the updated first motion vector range is pointing at a boundary of the first area.

公开(公告)号：US20220286690A1

公开(公告)日：2022-09-08

申请号：US17827144

申请日：2022-05-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao WANG ,  Semih ESENLIK ,  Han GAO ,  Anand Meher KOTRA ,  Elena Alexandrovna ALSHINA

IPC: H04N19/159 ,  H04N19/196 ,  H04N19/176 ,  H04N19/105

Abstract: A method of coding implemented by a decoding device or an encoding device, comprising obtaining indication information for a luma position (cbWidth/2, cbHeight/2) of a current coding block, relative to a top-left luma sample position (xCb, yCb) of the current coding block; setting a value of a luma intra prediction mode associated with the current coding block to a first default value, when the indication information indicates that an Intra Block Copy (IBC) mode or palette mode is applied for the luma component at the luma position (cbWidth/2, cbHeight/2), relative to the top-left luma sample position (xCb, yCb) of the current coding block; and obtaining a value of a chroma intra prediction mode based on the value of the luma intra prediction mode of the current coding block.

公开(公告)号：US20220224944A1

公开(公告)日：2022-07-14

申请号：US17698824

申请日：2022-03-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Biao WANG ,  Semih ESENLIK ,  Anand Meher KOTRA ,  Han GAO ,  Elena Alexandrovna ALSHINA

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/82

Abstract: A method of coding implemented by a decoding device, a decoder, an encoder are disclosed, the method comprising: obtaining a bitstream; obtaining a value of a syntax element sps_num_subpics_minus1 according to parse the bitstream; when the value of the syntax element sps_num_subpics_minus1 is greater than a preset value, obtaining a value of a syntax element sps_independent_subpics_flag from the bitstream.

公开(公告)号：US20220217347A1

公开(公告)日：2022-07-07

申请号：US17700904

申请日：2022-03-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Roman Igorevich CHERNYAK ,  Sergey Yurievich IKONIN ,  Timofey Mikhailovich SOLOVYEV ,  Alexander Alexandrovich KARABUTOV ,  Elena Alexandrovna ALSHINA

IPC: H04N19/124 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: A method for inverse quantization of a current block of a picture, the method comprising: receiving a bitstream; obtaining a joint chrominance component residual, JCCR, control flag from the bitstream; obtaining a chrominance mapping information from the bitstream based on the JCCR control flag; obtaining at least one chrominance quantization parameter, QP, offset from the bitstream based on the JCCR control flag; obtaining a QP value for the current chrominance block based on the obtained chrominance mapping information and the at least one obtained chrominance QP offset; performing inverse quantization on the current chrominance block by using the obtained QP value.

公开(公告)号：US20210144374A1

公开(公告)日：2021-05-13

申请号：US17154788

申请日：2021-01-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Semih ESENLIK ,  Max BLAESER ,  Zhijie ZHAO ,  Han GAO ,  Anand Meher KOTRA ,  Biao WANG ,  Elena Alexandrovna ALSHINA

IPC: H04N19/119 ,  H04N19/184 ,  H04N19/176 ,  H04N19/105

Abstract: A method of coding implemented by a decoding device, comprising obtaining a bitstream; obtaining a value of an indicator for a current block according to the bitstream; obtaining a value of a first parameter for the current block and a value of a second parameter for the current block, according to the value of the indicator and a predefined lookup table; obtaining a value of a sample distance for a sample which is located in the current block, according to the value of the first parameter and the value of the second parameter; obtaining a prediction value for the sample, according to the value of the sample distance for the sample.