公开(公告)号：US20220368930A1

公开(公告)日：2022-11-17

申请号：US17863242

申请日：2022-07-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich FILIPPOV ,  Vasily Alexeevich RUFITSKIY ,  Elena Alexandrovna ALSHINA

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A method of obtaining a maximum number of geometric partitioning merge mode candidates for video decoding and a video decoding apparatus are disclosed, wherein the method comprises: obtaining a bitstream for a video sequence; obtaining a value of a first indicator according to the bitstream, wherein the first indicator represents a maximum number of merging motion vector prediction (MVP) candidates; obtaining a value of a second indicator according to the bitstream, wherein the second indicator represents whether a geometric partition based motion compensation is enabled for the video sequence; and parsing a value of a third indicator from the bitstream, when the value of the first indicator is greater than a threshold and when the value of the second indicator is equal to a preset value, wherein the third indicator represents a maximum number of geometric partitioning merge mode candidates subtracted from the value of the first indicator.

公开(公告)号：US20220286684A1

公开(公告)日：2022-09-08

申请号：US17684224

申请日：2022-03-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: The general intra prediction process is unnecessarily complicated with inclusion of the reference sample filtering. This application provides solutions for this problem. A method for intra prediction is provided. The method includes: during an intra predicted sample generation stage, obtaining a filtering indication, which indicates whether a filtered value or an unfiltered value of reference samples of the current coding block will be used. When the value of the filtering indication is true, a prediction sample is generated by using the filtered value of the reference samples based on the planar mode. When the value of the filtering indication is false, a prediction sample is generated by using the unfiltered value of the reference samples based on the planar mode. As a result, the reference sample filtering stage can be fully removed or can be combined with other stage.

公开(公告)号：US20220256196A1

公开(公告)日：2022-08-11

申请号：US17716349

申请日：2022-04-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/70 ,  H04N19/503 ,  H04N19/172

Abstract: A method of coding implemented by a decoding device is provided. The method includes parsing a bitstream to obtain a flag from a picture header of the bitstream, wherein the flag indicates whether a current picture is I picture. when the flag indicates that the current picture is I picture, a syntax element designed for inter prediction is inferred to a default value; or when the flag indicates that the current picture is P or B picture, obtaining a syntax element designed for inter prediction from the picture header.

公开(公告)号：US20220248062A1

公开(公告)日：2022-08-04

申请号：US17707202

申请日：2022-03-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/80 ,  H04N19/109 ,  H04N19/132 ,  H04N19/182 ,  H04N19/176 ,  H04N19/139 ,  H04N19/105 ,  H04N19/117 ,  H04N19/52 ,  H04N19/196

Abstract: An apparatus for inter prediction of a sample value of a current full-integer pixel of a plurality of pixels associated with a current block of a current frame of a video signal is disclosed. The apparatus is configured to: determine a motion vector of the current full-integer pixel based on a motion compensation model; determine for the current full-integer pixel a corresponding sub-integer pixel in a reference frame; determine positions of a set of corresponding filter support pixels in the reference frame; obtain a respective sample value of the corresponding sub-integer pixel of the current full-integer pixel and the corresponding filter support pixels in the reference frame by applying a bilinear interpolation; and determine the inter predicted sample value of the current full-integer pixel.

公开(公告)号：US20220191496A1

公开(公告)日：2022-06-16

申请号：US17686585

申请日：2022-03-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/124 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186

Abstract: A method for deblocking a chroma block edge between a first chroma block of a first image block and a second chroma block of a second image block. The method includes a decision process which includes: determining a first chroma quantization parameter for the first chroma block based on a first luma quantization parameter of a first luma block of the first image block and a chroma QP mapping table for the first chroma block; determining a second chroma quantization parameter for the second chroma block based on a second luma quantization parameter of a second luma block of the second image block and a chroma QP mapping table for the second chroma block; determining an averaged and rounded chroma quantization parameter based on the first chroma quantization parameter and the second chroma quantization parameter; and determining a threshold parameter based on the averaged and rounded chroma quantization parameter.

公开(公告)号：US20220182649A1

公开(公告)日：2022-06-09

申请号：US17681003

申请日：2022-02-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

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

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：US20220007034A1

公开(公告)日：2022-01-06

申请号：US17478534

申请日：2021-09-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

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

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 postion (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 a Matrix-based Intra Prediction (MIP) is applied for the luma component at the luma position (cbWidth/2, cbHeight/2), relative to the top-left luma sample postion (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：US20210243470A1

公开(公告)日：2021-08-05

申请号：US17237924

申请日：2021-04-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/573 ,  H04N19/176 ,  H04N19/577 ,  H04N19/159

Abstract: The present disclosure relates to video encoding and decoding, and in particular to determining motion information for a current block using a history-based motion vector predictor, HMVP, list. The HMVP list is constructed, with said list being an ordered list of N HMVP candidates Hk, k=0, . . . , N−1, which are associated with motion information of N preceding blocks of the frame and precede the current block. Each HMVP candidate has motion information including elements of one or more motion vectors, MVs, one or more reference picture indices corresponding to the MVs, and one or more bi-prediction weight indices. One or more HMVP candidates from the HMVP list are added into a motion information candidate list for the current block; and the motion information is derived based on the motion information candidate list.

公开(公告)号：US20240323391A1

公开(公告)日：2024-09-26

申请号：US18658610

申请日：2024-05-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/14 ,  H04N19/174 ,  H04N19/423

CPC classification number: H04N19/14 ,  H04N19/174 ,  H04N19/423

Abstract: A method of coding performed by a decoding device and a decoder are disclosed. The method comprises: obtaining a bitstream for a current picture; obtaining a quantity of tiles in a tile row of the current picture; obtaining a value of an address of a current slice comprised in the current picture; obtaining a value of a horizontal coordinate according to the value of the address of the current slice; and when a difference value between the quantity of tiles in the tile row of the current picture and the value of the horizontal coordinate is not equal to a first threshold, parsing an indication value for a slice width from the bitstream for the current picture.

公开(公告)号：US20240244181A1

公开(公告)日：2024-07-18

申请号：US18414188

申请日：2024-01-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/82

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/82

Abstract: The present disclosure relates to video encoding and decoding, and in particular, a method for inter prediction for a block in a frame of a video signal includes: constructing a history-based motion information candidate list, wherein the list is an ordered list comprising N history-based motion information candidates Hk containing motion information of N preceding blocks preceding the block, wherein each history-based motion information candidate comprises: one or more motion vectors (MVs), one or more reference picture indices corresponding to the MVs, and an interpolation filter index; adding one or more history-based motion information candidates from the history-based motion information candidate list into a motion information candidate list for the block; and deriving motion information for the block based on the motion information candidate list.