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公开(公告)号：US20180352232A1
公开(公告)日：2018-12-06
申请号：US16100813
申请日：2018-08-10
Applicant: Huawei Technologies Co., Ltd.
IPC: H04N19/129 , H04N19/64 , H04N19/44 , H04N19/176
CPC classification number: H04N19/176 , H04N19/129 , H04N19/136 , H04N19/18 , H04N19/70
Abstract: The disclosure proposes a decoder for decoding coefficients of blocks of a video sequence from a bitstream. The decoder comprises a scan pattern list module for providing one or more pre-defined scan orders, a scan order generator for generating one or more scan orders, a scan order selector for selecting a scan order for each block from the pre-defined and generated scan orders on the basis of scan order information contained in the bitstream, a decoding module for decoding one or more coefficient vectors of each block from the bitstream, a deserializer for inverse scanning, for each block, the one or more coefficient vectors of that block according to the scan order selected for that block so as to obtain a coefficient matrix. The scan order generator generates the one or more scan orders depending on one or more previously obtained coefficient matrices of blocks of the video sequence.
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公开(公告)号：US20250168398A1
公开(公告)日：2025-05-22
申请号：US18962482
申请日：2024-11-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/59 , H04N19/105 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/593
Abstract: Provided are a method, an apparatus, a computer program product and a non-transitory computer-readable medium for video coding. The method comprises performing an intra-prediction process of a block comprising samples to be predicted, wherein an interpolation filter is applied to reference samples of the block during the intra-prediction process of the block. The interpolation filter is selected on the basis of a subpixel offset between the reference samples and the samples to be predicted, and a size of a main reference side used in the intra-prediction process is determined according to a length of the interpolation filter and an intra-prediction mode that provides, out of a set of available intra-prediction modes, the greatest non-integer value of said subpixel offset, wherein the main reference side comprises the reference samples.
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公开(公告)号：US20240388701A1
公开(公告)日：2024-11-21
申请号：US18788066
申请日：2024-07-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/11 , H04N19/105 , H04N19/119 , H04N19/136 , H04N19/139 , H04N19/176 , H04N19/593 , H04N19/70
Abstract: An intra-prediction method includes: determining, by an intra-prediction apparatus, a directional intra-prediction mode for a rectangular video coding block from an extended set of directional intra-prediction modes, wherein the extended set of directional intra-prediction modes includes extended directional intra-prediction modes and conventional directional intra-prediction modes and determining, by the intra-prediction apparatus, a plurality of available reference samples based on a direction of the directional intra-prediction mode. The method further includes: intra-predicting, by the intra-prediction apparatus, pixel values of pixels of the rectangular video coding block based on the plurality of available reference samples.
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公开(公告)号：US20230421776A1
公开(公告)日：2023-12-28
申请号：US18320199
申请日：2023-05-19
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/159 , H04N19/103 , H04N19/105 , H04N19/117 , H04N19/176 , H04N19/593 , H04N19/80
CPC classification number: H04N19/159 , H04N19/103 , H04N19/105 , H04N19/117 , H04N19/176 , H04N19/593 , H04N19/80
Abstract: A method of intra prediction of a block in a picture of a video is disclosed. The method comprises obtaining an intra prediction mode of the block; determining whether the intra prediction mode of the block is a wide-angle mode; filtering reference samples for the block based, at least in part, upon determining that the intra prediction mode of the block is the wide-angle mode; and generating predicted samples of the block based on filtered reference samples.
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公开(公告)号：US20230353730A1
公开(公告)日：2023-11-02
申请号：US18330178
申请日：2023-06-06
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/593 , H04N19/11 , H04N19/105 , H04N19/139 , H04N19/70 , H04N19/136 , H04N19/176 , H04N19/119
CPC classification number: H04N19/11 , H04N19/105 , H04N19/119 , H04N19/136 , H04N19/139 , H04N19/176 , H04N19/593 , H04N19/70
Abstract: An intra-prediction method includes: determining, by an intra-prediction apparatus, a directional intra-prediction mode for a rectangular video coding block from an extended set of directional intra-prediction modes, wherein the extended set of directional intra-prediction modes includes extended directional intra-prediction modes and conventional directional intra-prediction modes and determining, by the intra-prediction apparatus, a plurality of available reference samples based on a direction of the directional intra-prediction mode. The method further includes: intra-predicting, by the intra-prediction apparatus, pixel values of pixels of the rectangular video coding block based on the plurality of available reference samples.
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Patent Agency Ranking
公开(公告)号：US20230128206A1
公开(公告)日：2023-04-27
申请号：US18146299
申请日：2022-12-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/593 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/182 , H04N19/119
Abstract: A method for intra prediction of a current block of a picture is provided. The method includes obtaining an aspect ratio of the current block according to a width and a height of the current block; obtaining a weighting factor based on the aspect ratio, and determining an intra-prediction value of the current block based on the weighting factor. Intra-prediction value of a current block may be obtained with high accuracy or low computational complexity, so as to improve coding efficiency.
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公开(公告)号：US20220345712A1
公开(公告)日：2022-10-27
申请号：US17853920
申请日：2022-06-30
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Alexey Konstantinovich FILIPPOV , Vasily Alexeevich RUFITSKIY , Elena Alexandrovna ALSHINA
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176
Abstract: A method for intra prediction is provided, the method including: obtaining a predicted sample value for a sample of the block; obtaining a scaling factor value according to an intra prediction mode for the current coding block, and according to at least one of: a height of the current coding block, or a width of the current coding block, or a size of a subpartition of the current coding block; determining a first weight value based on the scaling factor value; determining a second weight value based on the scaling factor value; calculating an additional value as a weighted sum of a top reference sample value and a left reference sample value, by weighting the top reference sample value with the first weight and the left reference sample value with the second weight; and obtaining a modified predicted sample value according to the additional value and the predicted sample value.
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48.发明申请公开(公告)号：US20220217344A1
公开(公告)日：2022-07-07
申请号：US17706328
申请日：2022-03-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Alexey Konstantinovich FILIPPOV , Vasily Alexeevich RUFITSKIY , Han GAO , Semih ESENLIK , Elena Alexandrovna ALSHINA
IPC: H04N19/119 , H04N19/176 , H04N19/167 , H04N19/503 , H04N19/159 , H04N19/107 , H04N19/105
Abstract: The present disclosure provides example computer-implemented methods and decoders of video coding for prediction of a block using an inter prediction mode to obtain predicted samples for the block. One example method includes defining a size of a subblock that is smaller than the size of the block. A position of the subblock within the block is specified. One or more allowed split directions of a triangle partitioning mode (TPM) is determined for the subblock depending on which of the sides of the subblock coincide with the sides of the block. One or more predicted samples for the block is obtained by using TPM partitioning performed for the subblock in accordance with the size of the subblock, the position of the subblock within the block, and TPM split direction of the subblock. The block is reconstructed based on the one or more predicted samples.
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公开(公告)号：US20220078484A1
公开(公告)日：2022-03-10
申请号：US17454896
申请日：2021-11-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Alexey Konstantinovich FILIPPOV , Vasily Alexeevich RUFITSKIY , Xiang MA , Elena Alexandrovna ALSHINA
IPC: H04N19/593 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/149 , H04N19/96 , H04N19/186
Abstract: A method for intra prediction of a current chroma block, the method comprising: determining a filter for a luma block collocated with the current chroma block, wherein the determining process is performed based on a partitioning data; obtaining filtered reconstructed luma samples, by applying the determined filter to reconstructed luma samples of a luma block collocated with the current chroma block, and to luma samples in a selected position neighboring to the luma block; obtaining, based on the filtered reconstructed luma samples as an input, linear model parameters; and performing cross-component prediction based on the obtained linear model parameters and the filtered reconstructed luma samples of the luma block, to obtain prediction values of the current chroma block.
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公开(公告)号：US20210258608A1
公开(公告)日：2021-08-19
申请号：US17223758
申请日：2021-04-06
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/59 , H04N19/176 , H04N19/117 , H04N19/593 , H04N19/159 , H04N19/105
Abstract: Provided are a method, an apparatus, a computer program product and a non-transitory computer-readable medium for video coding. The method comprises performing an intra-prediction process of a block comprising samples to be predicted, wherein an interpolation filter is applied to reference samples of the block during the intra-prediction process of the block. The interpolation filter is selected on the basis of a subpixel offset between the reference samples and the samples to be predicted, and a size of a main reference side used in the intra-prediction process is determined according to a length of the interpolation filter and an intra-prediction mode that provides, out of a set of available intra-prediction modes, the greatest non-integer value of said subpixel offset, wherein the main reference side comprises the reference samples.
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