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：US20200244965A1

公开(公告)日：2020-07-30

申请号：US16850854

申请日：2020-04-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Maxim Borisovitch SYCHEV ,  Georgy Aleksandrovich ZHULIKOV ,  Timofey Mikhailovich SOLOVYEV ,  Jianle CHEN

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/137 ,  H04N19/117 ,  H04N19/176

Abstract: The disclosure relates to an apparatus and method for inter prediction of a sample value of a current full-integer pixel of a plurality of pixels of a current block of a current frame of a video signal. The apparatus comprises a processing unit configured to: determine a motion vector of the current full-integer pixel on the basis of the current frame and a reference frame of the video signal and/or on the basis of a motion compensation model; determine for the current full-integer pixel a corresponding sub-integer pixel in the reference frame on the basis of the motion vector of the current full-integer pixel; generate on the basis of a predefined set of filter support pixels in the current frame a set of corresponding filter support pixels in the reference frame, wherein the predefined set of filter support pixels in the current frame comprises one or more neighboring full-integer and/or sub-integer pixels of the current full-integer pixel; determine 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; and determine the inter predicted sample value of the current pixel in the current frame by applying a spatial high-pass filter to the sample value of the corresponding sub-integer pixel of the current full-integer pixel in the reference frame and to the sample values of the corresponding filter support pixels in the reference frame.

公开(公告)号：US20250126265A1

公开(公告)日：2025-04-17

申请号：US19002140

申请日：2024-12-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Timofey Mikhailovich SOLOVYEV ,  Georgii Petrovich GAIKOV ,  Maxim Borisovitch SYCHEV ,  Alexander Alexandrovich KARABUTOV ,  Sergey Yurievich IKONIN

IPC: H04N19/13 ,  H04N19/184 ,  H04N19/196

Abstract: Methods and apparatuses are described to encoded data into a bitstream and to decode data from a bitstream. A decoding method including: receiving a bitstream including encoded data of an input signal and a first parameter; parsing the bitstream to obtain the first parameter; obtaining an entropy coding parameter based on the first parameter; reconstructing at least a portion of the input signal, based on the entropy coding parameter and the encoded data. Due to adaptiveness of the entropy coding parameters, the optimal work of the entropy coder is possible on low bitrates which results in the bitrate saving; and the absence of clipping effect is achieved on high bitrates, which results in higher reconstruction signal quality.

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：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：US20210014521A1

公开(公告)日：2021-01-14

申请号：US17032416

申请日：2020-09-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Maxim Borisovitch SYCHEV ,  Georgy Aleksandrovich ZHULIKOV ,  Timofey Mikhailovich SOLOVYEV

IPC: H04N19/513 ,  H04N19/80 ,  H04N19/523 ,  H04N19/176 ,  H04N19/182 ,  H04N19/169

Abstract: A method for inter prediction of a sample value of a current pixel of a plurality of pixels of a current block of a current frame of a video signal is proposed. The method (800) comprises: determining (801) a plurality of block-wise motion vectors related one-to-one to a plurality of blocks of the current frame; determining (803) a pixel-wise motion vector of the current pixel based on the plurality of block-wise motion vectors; determining one or more reference pixels in the reference frame based on the pixel-wise motion vector of the current pixel; and determining (805) an inter predicted sample value of the current pixel based on one or more sample values of the one or more reference pixels in the reference frame. Coding efficiency is thus improved.

公开(公告)号：US20200351493A1

公开(公告)日：2020-11-05

申请号：US16918733

申请日：2020-07-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/169

Abstract: The present disclosure relates to encoding and decoding of video images. Motion vectors are used as predictors for prediction of an image for a current coding unit CU, which is within a current coding tree unit CTU. The motion vectors are taken from a list of motion vector candidates MVCs. The list is generated for the current CU using a pattern of positions of allowed motion vectors, and in dependence on the positions of the pattern relative to the current CU, and on the position of the current CU within the current CTU. From the pattern, a subset of positions is selected and positions are restricted to positions within the current CTU, while other pattern positions not available or not stored in a buffer are excluded. Other excluded pattern positions may be substituted and/or adjusted to as to become available and/or are being stored in the buffer. The substitution and the adjustment of excluded pattern positions may be performed in dependence on the excluded positions relative to the substituted/adjusted positions.

公开(公告)号：US20250113062A1

公开(公告)日：2025-04-03

申请号：US18977533

申请日：2024-12-11

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.