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31.发明授权公开(公告)号：US12238274B2
公开(公告)日：2025-02-25
申请号：US17841324
申请日：2022-06-15
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Alexey Konstantinovich Filippov , Vasily Alexeevich Rufitskiy , Elena Alexandrovna Alshina
IPC: H04N19/82 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: A method of intra prediction of a coding block, performed by a decoder, the method comprising: obtaining a bitstream for the coding block; obtaining a value of intra prediction mode according to the bitstream; obtaining a value of an index for the coding block in accordance with the bitstream; obtaining a set of reference samples for the coding block, the set of reference samples comprises samples of a reconstructed block and additional samples; when the value of the index for the coding block is not equal to the predefined value, the set of reference samples comprises only of samples of the reconstructed block; obtaining a prediction value of a sample comprised in the coding block, according to the value of intra prediction mode for the coding block and the set of reference samples.
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公开(公告)号：US12231624B2
公开(公告)日：2025-02-18
申请号：US18075225
申请日：2022-12-05
Applicant: Huawei Technologies Co., Ltd.
IPC: H04N19/105 , H04N19/159 , H04N19/176
Abstract: The present disclosure provides methods and devices of intra predicting a block of a picture. The method comprises for a sample of the block: obtaining a predicted sample value from one or more reference sample values by performing intra-prediction using a DC intra-prediction mode; multiplying the predicted sample value by a sample weighting factor to produce a weighted predicted sample value; adding an additional value to the weighted predicted sample value to produce a non-normalized predicted sample value; and normalizing the non-normalized predicted sample value by an arithmetic right shift; wherein the sample weighting factor is ((2
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33.发明授权公开(公告)号：US12132897B2
公开(公告)日：2024-10-29
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: H04N19/107 , H04N19/105 , H04N19/119 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/503
CPC classification number: H04N19/119 , H04N19/105 , H04N19/107 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/503
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：US12063350B2
公开(公告)日：2024-08-13
申请号：US17407554
申请日：2021-08-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/105 , H04N19/117 , H04N19/136 , H04N19/186 , H04N19/196
CPC classification number: H04N19/105 , H04N19/117 , H04N19/136 , H04N19/186 , H04N19/196
Abstract: The present disclosure relates to the field of picture processing. In particular, the present disclosure relates to improving intra prediction (such as the chroma intra prediction) using a cross component linear model (CCLM) and, more particularly, relating to spatial filtering used in a cross-component linear model for intra prediction with different chroma formats. An apparatus, an encoder, a decoder and corresponding methods for cross-component prediction for a picture, in which the set of down-sampling filters applied during the prediction depends on a chroma format, that may be one of multiple supported chroma formats are provided, so as to improve coding efficiency.
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35.发明授权公开(公告)号：US11973953B2
公开(公告)日：2024-04-30
申请号：US17645269
申请日：2021-12-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Alexey Konstantinovich Filippov , Vasily Alexeevich Rufitskiy , Elena Alexandrovna Alshina
IPC: H04N19/132 , H04N19/105 , H04N19/124 , H04N19/176
CPC classification number: H04N19/132 , H04N19/105 , H04N19/124 , H04N19/176
Abstract: A method for picture or video encoding, wherein a block of residual signal is being subsampled before transform, quantization and residual coding, comprising obtaining a residual signal from an original picture and a predicted block; obtaining a subsampled block from samples of a near-boundary region of a block of residual signal, wherein the subsampled block has a smaller size than the block of residual signal; performing forward transform over the subsampled block; performing quantization over the subsampled block to obtain a subsampled quantized residual block; performing residual coding of the subsampled quantized residual block; obtaining a subsampled reconstructed residual block by inverse quantization and inverse transform of the subsampled quantized residual block; obtaining a reconstructed residual block by filling samples of the near-boundary region of the reconstructed residual block from the subsampled reconstructed residual block; and obtaining a reconstructed block from the predicted block and the reconstructed residual block.
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Patent Agency Ranking
公开(公告)号：US11877013B2
公开(公告)日：2024-01-16
申请号：US17351957
申请日：2021-06-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/82 , H04N19/105 , H04N19/50
CPC classification number: H04N19/82 , H04N19/105 , H04N19/50
Abstract: The present disclosure relates to intra- or inter-prediction for video encoding and decoding. For that purpose, an apparatus and methods obtain a reference sample and a subpixel offset value. A 4-tap interpolation filter is used to filter the reference sample to obtain a predicted sample value. The filter coefficients c0, c1, c2, and c3 of the 4-tap interpolation filter satisfy
c
0
=
16
-
p
2
,
c
1
=
16
+
16
-
p
2
,
c
2
=
16
+
p
2
,
and
c
3
=
p
2
,
with p being a fractional part of the value of the subpixel offset.-
公开(公告)号：US20230388550A1
公开(公告)日：2023-11-30
申请号：US18359226
申请日：2023-07-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/65 , H04N19/14 , H04N19/182 , H04N19/82 , H04N19/147 , H04N19/117 , H04N19/196 , H04N19/172
CPC classification number: H04N19/65 , H04N19/14 , H04N19/182 , H04N19/82 , H04N19/147 , H04N19/117 , H04N19/198 , H04N19/172
Abstract: A method and apparatus for adaptively processing video samples in a video signal frame, the video samples being arranged in a Largest Coding Unit. The method comprises extracting a plurality of video samples from the Largest Coding Unit, calculating a correction offset for a first video sample of the extracted plurality of video samples upon the basis of a first value of the first video sample and a second value of a second video sample of the extracted plurality of video samples, and weighting the first video sample with the correction offset.
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公开(公告)号：US11750837B2
公开(公告)日：2023-09-05
申请号：US17223758
申请日：2021-04-06
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/59 , H04N19/105 , H04N19/117 , H04N19/159 , H04N19/176 , H04N19/593
CPC classification number: 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：US11647185B2
公开(公告)日：2023-05-09
申请号：US17201228
申请日：2021-03-15
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/184 , H04N19/503 , H04N19/593
CPC classification number: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/184 , H04N19/503 , H04N19/593
Abstract: Methods and devices for intra-prediction of a current block in video encoding or decoding are provided. A method includes: performing intra-prediction processing of the current block according to a directional intra-prediction mode, including applying reference sample filtering or subpixel interpolation filtering to reference samples in one or more reference blocks, wherein the directional intra-prediction mode is classified into one of the following groups: (A) vertical or horizontal modes, (B) directional modes including diagonal modes that represent angles which are multiples of 45 degrees, (C) remaining directional modes; if the directional intra-prediction mode is classified as belonging to group B, a reference sample filter is applied to the reference samples; if the directional intra-prediction mode is classified as belonging to group C, an intra reference sample interpolation filter is applied to the reference samples.
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公开(公告)号：US11431988B2
公开(公告)日：2022-08-30
申请号：US17013593
申请日：2020-09-05
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/105 , H04N19/159 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/176 , H04N19/46 , H04N19/82
Abstract: Devices and methods of intra prediction of a block of a picture are provided. In various embodiments, information indicating an Intra Sub-Partitions (ISP) split type can be obtained. A value of a filter flag can be set based on the ISP split type. For instance, the value of the filter flag can be set to 0 when the ISP split type does not indicate not to split a current block. A set of coefficients of an interpolation filter can then be selected according to the value of the filter flag. For instance, fG coefficients or fC coefficients can be selected based on the value of the filter flag. Still in those embodiment, the selected set of coefficients can be applied to reference samples. In some embodiments, the method removes mode dependency during selection of interpolation filter type. This could increase encoding or decoding efficiency.
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