公开(公告)号：US12238338B2

公开(公告)日：2025-02-25

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：US12184863B2

公开(公告)日：2024-12-31

申请号：US18145569

申请日：2022-12-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Maxim Borisovitch Sychev ,  Elena Alexandrovna Alshina ,  Mikhail Vyacheslavovich Sosulnikov ,  Alexander Alexandrovich Karabutov

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172

Abstract: Methods and apparatuses are provided for estimating motion vectors of a dense motion field based on subsampled sparse motion field. The sparse motion field includes two or more motion vectors with their respective start positions. For each of the motion vectors, a transformation is derived which transforms the motion vector from its start point into a target point. The transformed motion vectors then contribute to the estimated motion vector on the target position. The contribution of each motion vector is weighted. Such motion estimation may be readily used for video encoding and decoding.

公开(公告)号：US20240422311A1

公开(公告)日：2024-12-19

申请号：US18747180

申请日：2024-06-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/184 ,  H04N19/30 ,  H04N19/80

Abstract: A method for operating a two-dimensional (2D) separable interpolation filter for coding a video, wherein the two-dimensional separable interpolation filter comprises a first and a second one-dimensional (1D) interpolation filter and a temporal buffer of a predetermined buffer size, wherein the method comprises: obtaining filter coefficients for the first one-dimensional interpolation filter of the two-dimensional interpolation filter; comparing a sum of positive filter coefficients of the obtained filter coefficients with a threshold; and upon determining that the sum of positive filter coefficients is larger than the threshold, amending one or more of the filter coefficients to obtain amended filter coefficients, wherein the one or more filter coefficients are amended such that a sum of positive filter coefficients of the amended filter coefficients is not larger than the threshold; applying the amended filter coefficients to samples of the video to obtain a value of a fractional sample position of the video; re-scaling the value of the fractional sample position and storing the re-scaled value of the fractional sample position in the temporal buffer.

公开(公告)号：US20240340425A1

公开(公告)日：2024-10-10

申请号：US18749362

申请日：2024-06-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Mikhail Vyacheslavovich Sosulnikov ,  Sergey Yurievich Ikonin ,  Andrey Soroka ,  Elena Alexandrovna Alshina

IPC: H04N19/13 ,  H04N19/103 ,  H04N19/136 ,  H04N19/184

CPC classification number: H04N19/13 ,  H04N19/103 ,  H04N19/136 ,  H04N19/184

Abstract: The present disclosure provides a method of decoding an encoded signal. The method includes receiving at least one bitstream comprising an encoded signal, the signal being entropy encoded with one or more Gaussian mixture models (GMMs), and the at least one bitstream comprising information for obtaining parameters of the one or more GMMs. The method further includes obtaining the GMM parameters based on the information from the at least one bitstream; and entropy decoding the signal using the GMMs with the obtained GMM parameters. The present disclosure further refers to a corresponding encoding method, decoder and encoder.

公开(公告)号：US12101467B2

公开(公告)日：2024-09-24

申请号：US17703661

申请日：2022-03-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Elena Alexandrovna Alshina

IPC: H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176

Abstract: A method performs combined inter-intra prediction of a current block in video coding. The combined intra-inter-prediction is used for providing a prediction block, and the weights for the intra- and inter-prediction blocks used to obtain the prediction block can be finely tuned The method includes: determining prediction information for a neighboring block adjacent to the current block, the prediction information comprising a prediction mode used for prediction of the neighboring block, determining whether matrix-based intra prediction (MIP) is to be used for the prediction of the current block; and predicting the current block as a weighted sum of an intra-predicted block and an inter-predicted block. The weights of the inter-predicted block and the intra-predicted block are determined based on the prediction information for the neighboring block and the determining whether MIP is to be used for the prediction of the current block.

公开(公告)号：US12081765B2

公开(公告)日：2024-09-03

申请号：US17681066

申请日：2022-02-25

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

CPC classification number: 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：US20240244274A1

公开(公告)日：2024-07-18

申请号：US18620667

申请日：2024-03-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ahmet Burakhan Koyuncu ,  Atanas Boev ,  Elena Alexandrovna Alshina

IPC: H04N19/91 ,  G06N7/01 ,  H04N19/436

CPC classification number: H04N19/91 ,  G06N7/01 ,  H04N19/436

Abstract: Methods and apparatuses are described for entropy encoding and decoding of a latent tensor, which includes separating the latent tensor into segments in the spatial dimensions and in the channel dimension, each segment including at least one latent tensor element. An arrangement of the segments is processed by a neural network; the neural network includes at least one attention layer. Based on the processed segment a probability model is obtained for entropy encoding or decoding of a latent tensor element.

公开(公告)号：US20240214562A1

公开(公告)日：2024-06-27

申请号：US18412589

申请日：2024-01-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Sergey Yurievich Ikonin ,  Nicola GIULIANI ,  Biao Wang ,  Elena Alexandrovna Alshina ,  Han Gao

IPC: H04N19/114 ,  H04N19/136 ,  H04N19/177 ,  H04N19/184 ,  H04N19/42 ,  H04N19/587

CPC classification number: H04N19/114 ,  H04N19/136 ,  H04N19/177 ,  H04N19/184 ,  H04N19/42 ,  H04N19/587

Abstract: An apparatus for generating a bitstream representing input frames of a video sequence, is provided. The apparatus includes a processing circuitry configured to generate the bitstream including a synthesized frame at a first position of a first input frame based on two or more input frames. A quality measure for the synthesized frame is determined. Based on determining that the quality measure fulfills a predetermined condition, an indication of the first position is included into a bitstream portion, and based on determining that the quality measure does not fulfill the predetermined condition, content of the first input frame is encoded into the bitstream portion.

公开(公告)号：US11985322B2

公开(公告)日：2024-05-14

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

CPC classification number: 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：US11924407B2

公开(公告)日：2024-03-05

申请号：US17451139

申请日：2021-10-15

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.