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公开(公告)号：US20220038689A1
公开(公告)日：2022-02-03
申请号：US17503650
申请日：2021-10-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: Devices and methods of intra prediction of a block of a picture are provided. The method includes obtaining reference samples of a block, and determining a value of a predicted sample based on the reference samples and an intra prediction mode. The method further includes obtaining a value of a multiplier based on at least one dimension of the block, and normalizing the value of the predicted sample based on the value of the multiplier and a value of a shift. The intra prediction mode is INTRA_DC, or INTRA_BI, or horizontal intra prediction mode. By normalizing the value of the predicted sample based on the value of the multiplier and a value of a shift without division operation, the method could increase intra prediction efficiency.
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公开(公告)号：US20210385447A1
公开(公告)日：2021-12-09
申请号：US17408082
申请日：2021-08-20
Applicant: Huawei Technologies Co., Ltd.
IPC: H04N19/117 , H04N19/593 , H04N19/82 , H04N19/13 , H04N19/59 , H04N19/196 , H04N19/42 , H04N19/157 , H04N19/184
Abstract: A video coding device, comprising a sequence of filters that are configurable by one or more primary parameters and one or more secondary parameters, and a filter controller configured to adjust the one or more secondary parameters based on the one or more primary parameters and based on a strength criterion of the sequence of filters.
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公开(公告)号：US20240422353A1
公开(公告)日：2024-12-19
申请号：US18820014
申请日：2024-08-29
Applicant: Huawei Technologies Co., Ltd.
IPC: H04N19/593 , H04N19/105 , H04N19/11 , H04N19/132 , H04N19/176
Abstract: A method of coding comprises determining a predicted sample value P(x, y) based on one or more reference sample values for a sample from a plurality of samples of a block using a DC intra-prediction mode; determining a vertical weighting factor based on one of a height of the block, a width of the block, or both; determining a horizontal weighting factor based on one of the height, the width, or both; obtaining a modified predicted sample value {circumflex over (P)}(x, y) without a weighting factor of the top-left reference sample R−1,−1 based on: (wL×R-1,y+WT×Rx,−1+(64−wL−wT)×P(x,y)+32))>>6; and reconstructing the block based on the modified predicted sample value {circumflex over (P)}(x, y) and a residual block; wherein wT is the vertical weighting factor, wL is the horizontal weighting factor, Rx,−1 represents a value of nearest reference samples located above the sample, and R−1,y represents a value of nearest reference samples located to the left of the sample.
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公开(公告)号：US20240146974A1
公开(公告)日：2024-05-02
申请号：US18529826
申请日：2023-12-05
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 subpixel offset.
c
0
=
1
6
-
p
2
,
c
1
=
1
6
+
1
6
-
p
2
,
c
2
=
1
6
+
p
2
,
and
c
3
=
p
2
,
with p being a fractional part of the value of the-
15.发明申请公开(公告)号：US20220321888A1
公开(公告)日：2022-10-06
申请号：US17843015
申请日：2022-06-17
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 an intra predicting process of a video block is provided. The method comprises: obtaining a predicted sample value for a sample of the current coding block; obtaining a scaling factor value according to an intra prediction mode for the current coding block, and according to a height of the current coding block and/or a width of the current coding block; determining a first weight based on the scaling factor value; determining a second weight 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 weighting the left reference sample value with the second weight; obtaining a modified predicted sample value according to the additional value and the predicted sample value; and outputting the modified predicted sample.
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Patent Agency Ranking
公开(公告)号：US20220248044A1
公开(公告)日：2022-08-04
申请号：US17716410
申请日：2022-04-08
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huanbang CHEN , Haitao YANG , Alexey Konstantinovich FILIPPOV , Vasily Alexeevich RUFITSKIY
IPC: H04N19/503 , H04N19/174 , H04N19/109 , H04N19/176 , H04N19/186 , H04N19/136 , H04N19/105
Abstract: The present disclosure relates to moving picture processing, and in particular to cases where non-rectangular partitioning modes are used for the inter-prediction in a combination with weighted prediction (WP) for coding fades. Non-rectangular modes refer to those inter-prediction modes, in which case a current block is partitioned/sliced in a non-rectangular way (slices). Such modes may be triangular (TMP) or geometric (GEO) prediction. The aim of the invention is to harmonize non-rectangular partitioning modes with WP by way of disabling TMP/GEO when WP is applied. This may be accomplished by checking whether all reference pictures for a current slice are disabled, and if this is the case to disable the slice-level WP for non-rectangular prediction units. Whether the reference pictures are disabled may be determined based on conditions applied on set values, for example, of luma/chroma flags, which refer to the reference pictures.
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17.发明申请公开(公告)号：US20220159251A1
公开(公告)日：2022-05-19
申请号：US17590976
申请日：2022-02-02
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Alexey Konstantinovich FILIPPOV , Elena Alexandrovna ALSHINA , Vasily Alexeevich RUFITSKIY
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/169 , H04N19/174
Abstract: A method for a Sample Adaptive Offset (SAO) in-loop filtering process for a reconstructed picture, the method comprising: obtaining a reconstructed picture sample array; obtaining a value of the size of a current coding tree unit (CTU); obtaining at least one SAO parameter; comparing the value of the size of the current CTU with a predefined threshold, and upon determining that a value of the size of the current CTU is smaller than the predetermined threshold, setting a value of the size of a sample-adaptive offset (SAO) region to be equal to the predefined threshold; and performing a SAO process on the samples comprised in a the SAO region based on the at least one SAO parameter, wherein the SAO region is defined according to the value of the size of the SAO region.
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公开(公告)号：US20210409753A1
公开(公告)日：2021-12-30
申请号：US17407548
申请日：2021-08-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Vasily Alexeevich RUFITSKIY , Timofey Mikhailovich SOLOVYEV , Alexey Konstantinovich FILIPPOV , Jianle CHEN
IPC: H04N19/513 , H04N19/159 , H04N19/30 , H04N19/186 , H04N19/176
Abstract: The present invention relates to method and apparatus for motion vector derivation for affine based inter prediction of chroma subblocks based on chroma format. The method includes: determining chroma scaling factors in horizontal and vertical directions based on chroma format information, wherein the chroma format information indicates a chroma format of a current picture which the current image block belongs to; determining a set (S) of luma subblocks of the luma block based on values of the chroma scaling factors; determining a motion vector for a chroma subblock of the chroma block based on motion vectors of one or more luma subblocks in the set (S) of luma subblocks.
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公开(公告)号：US20210344953A1
公开(公告)日：2021-11-04
申请号：US17373347
申请日：2021-07-12
Applicant: Huawei Technologies Co., Ltd.
IPC: H04N19/593 , H04N19/186 , H04N19/172 , H04N19/11 , H04N19/159
Abstract: Devices and methods of directional intra prediction for chroma component of a picture are provided. The method includes obtaining an initial intra prediction mode of the chroma component, and deriving a chroma intra prediction mode (intraPredModeC) from a look up table (LUT) by using the initial intra prediction mode of the chroma component. The chroma component has different subsampling ratios in horizontal and vertical directions. The method further includes performing wide-angle mapping on the chroma intra prediction mode (intraPredModeC) to obtain a modified intraPredModeC; obtaining an angle parameter for the chroma component based on the modified intraPredModeC; and obtaining predicted samples of the chroma component based on the angle parameter. The method provides the minimum number of entries in the LUT that is used to determine chroma intra prediction mode from the initial chroma intra prediction mode.
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公开(公告)号：US20210329296A1
公开(公告)日：2021-10-21
申请号：US17361692
申请日：2021-06-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/593 , H04N19/186 , H04N19/176 , H04N19/167 , H04N19/105
Abstract: Apparatuses and methods for encoding and decoding are provided. The method for intra predicting a chroma sample of a block by applying cross-component linear model includes: obtaining reconstructed luma samples; determining maximum and minimum luma sample values based on the reconstructed luma samples; obtaining a difference of the maximum and minimum luma sample values. The method also includes: fetching a value out of a lookup table (LUT) by using a set of bits as an index, the set of bits following a position of the most-significant bit; obtaining linear model parameters based on the fetched value; and calculating a predicted chroma sample value by using the obtained linear model parameters. The efficiency to fetch the value out of the LUT is increased.
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