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.

公开(公告)号：US20200260122A1

公开(公告)日：2020-08-13

申请号：US16859753

申请日：2020-04-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： ALEXEY KONSTANTINOVICH FILIPPOV ,  Alexander Alexandrovich KARABUTOV ,  Shan LIU ,  VASILY ALEXEEVICH RUFITSKIY

IPC: H04N19/96 ,  H04N19/176 ,  H04N19/119

Abstract: An apparatus and a method for image coding with asymmetric partitioning are disclosed. Instead of a conventional approach of using partitioning mechanisms such as QTBT and Multi-Type Tree (MTT), an asymmetric partitioning mechanism that can provide a good performance/complexity tradeoff is introduced. This allows constraining parameters of the asymmetric partitioning mechanism to exclude modes that appear not frequently, thereby allowing keeping encoder-side complexity low and avoiding signaling overhead.

公开(公告)号：US20220394242A1

公开(公告)日：2022-12-08

申请号：US17870271

申请日：2022-07-21

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/70

Abstract: Reference picture management scheme is provided in the context of video coding. A method of decoding an encoded video sequence, comprising obtaining a value of a reference picture list (RPL) syntax element from a bitstream of the encoded video sequence, the RPL syntax element specifying whether syntax elements related to reference picture lists are present in the bitstream, when the RPL syntax element specifies that the syntax elements related to the reference picture lists are present in the bitstream, obtaining, from the bitstream, values of the syntax elements related to the reference picture lists; and constructing at least one reference picture list for inter prediction using the obtained values of the syntax elements related to the reference picture lists.

公开(公告)号：US20220070462A1

公开(公告)日：2022-03-03

申请号：US17509324

申请日：2021-10-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/126 ,  H04N19/132 ,  H04N19/44 ,  H04N19/186

Abstract: A method of obtaining a chrominance quantization parameter (QP) for chrominance components based on a luminance QP for luminance component, wherein the method is performed by a decoder, comprising parsing a received bitstream to obtain the luminance QP and information of a mapping function (ƒ) which associates a QP index (QPi) to the chrominance QP (QPc); obtaining the QPi based at least in a part on the luminance QP; obtaining the mapping function based on the obtained information; and obtaining a QPc based on the obtained mapping function and the obtained QPi.

公开(公告)号：US20210321113A1

公开(公告)日：2021-10-14

申请号：US17358572

申请日：2021-06-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Maxim Borisovitch SYCHEV ,  Timofey Mikhailovich SOLOVYEV ,  Alexander Alexandrovich KARABUTOV ,  Sergey Yurievich IKONIN ,  Jianle CHEN

IPC: H04N19/137 ,  H04N19/159 ,  H04N19/503 ,  H04N19/46 ,  H04N19/176

Abstract: The disclosure provides a motion vector compression method, comprising: obtaining a temporal motion vector; determining a compressed motion vector using a binary representation of the temporal motion vector comprising an exponent part and/or a mantissa part, wherein the exponent part comprises N bits, the mantissa part comprises M bits, and wherein N is a non-negative integer and M is a positive integer; and performing a temporal motion vector prediction (TMVP) using the compressed motion vector.

公开(公告)号：US20240205406A1

公开(公告)日：2024-06-20

申请号：US18439264

申请日：2024-02-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/126 ,  H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/186 ,  H04N19/44

CPC classification number: H04N19/126 ,  H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/186 ,  H04N19/44

Abstract: A method of obtaining a chrominance quantization parameter (QP) for chrominance components based on a luminance QP for a luminance component, wherein the method is performed by a decoder, and comprises parsing a received bitstream comprising a sequence parameter set (SPS) to obtain the luminance QP and information of a mapping function (ƒ) which associates a QP index (QPi) to a chrominance QP (QPc), wherein the chroma QP mapping table is signaled in the SPS; obtaining the QPi based at least in part on the luminance QP; obtaining the mapping function based on the obtained information of the mapping function; and obtaining a QPc based on the obtained mapping function and the obtained QPi.

公开(公告)号：US20240015334A1

公开(公告)日：2024-01-11

申请号：US18371593

申请日：2023-09-22

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

CPC classification number: 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：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：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：US20200252609A1

公开(公告)日：2020-08-06

申请号：US16854665

申请日：2020-04-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： ALEXEY KONSTANTINOVICH FILIPPOV ,  Alexander Alexandrovich KARABUTOV ,  Shan LIU ,  VASILY ALEXEEVICH RUFITSKIY

IPC: H04N19/119 ,  H04N19/33 ,  H04N19/105 ,  H04N19/176

Abstract: A picture encoding apparatus configured to hierarchically partition a block of picture data into sub-blocks; determine that a sub-block being coded belongs to an unequally-sized partitioned block; prepare a list of neighboring blocks for the sub-block of the unequally-sized partitioned block based on a size of the sub-block of the unequally-sized partitioned block and a partitioning type of at least one neighboring block of the unequally-sized partitioned block; and derive a context model that is used to encode split information of the sub-block of the unequally-sized partitioned block into a bit stream based on the prepared list of neighboring blocks.