公开(公告)号：US20210250578A1

公开(公告)日：2021-08-12

申请号：US17205350

申请日：2021-03-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/423 ,  H04N19/176

Abstract: A method for constructing a Most Probable Mode (MPM) list includes classifying each intra prediction mode derived from a neighboring block either as a valid or invalid subject to the mode direction and the position of its source block. Valid and invalid modes are considered most and least probable modes, respectively.

公开(公告)号：US10313705B2

公开(公告)日：2019-06-04

申请号：US15290148

申请日：2016-10-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy

IPC: H04N19/86 ,  H04N19/82 ,  H04N19/176 ,  H04N19/117 ,  H04N19/156

Abstract: A prediction technique, which use pre-prediction filtering techniques to reduce noise influence on the predicted samples of a block to be reconstructed, is presented. The prediction techniques suggested herein can be for example used in an encoding apparatus or a decoding apparatus. The reference samples that are used to reconstruct a given block of pixels of an image are categorized or segmented into subsets. The subsets may be processed differently, e.g. the subsets may be subjected to distinct filters. Examples of such filters include smoothing filters and/or deblocking filters, which are applied to the respective subsets of the reference samples.

公开(公告)号：US10104379B2

公开(公告)日：2018-10-16

申请号：US15282726

申请日：2016-09-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/117 ,  H04N19/102 ,  H04N19/174 ,  H04N19/18 ,  H04N19/187 ,  H04N19/467 ,  H04N19/61 ,  H04N19/70 ,  H04N19/176 ,  H04N19/182

Abstract: The Embodiments of the invention relate to methods for hiding values of a hierarchically layered coding unit in other values comprised by the coding unit is provided. Furthermore, embodiments of the invention also relate to methods for reconstructing hidden data from an encoded coding unit. Embodiments of the invention are also related to the implementation of these encoding and decoding methods in an apparatus and on a non-transitory computer readable medium. According to the embodiments of the invention, data are hidden in values of different layers of a hierarchically structured coding unit.

公开(公告)号：US20180262777A1

公开(公告)日：2018-09-13

申请号：US15976601

申请日：2018-05-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy

IPC: H04N19/60 ,  H04N19/18 ,  H04N19/189 ,  H04N19/124 ,  H04N19/44

CPC classification number: H04N19/60 ,  H04N19/12 ,  H04N19/122 ,  H04N19/124 ,  H04N19/18 ,  H04N19/189 ,  H04N19/44 ,  H04N19/467

Abstract: A method for encoding a source picture into an output bitstream using quantized transform coefficients, comprising obtaining, from the source picture, input data located in a transform block, transforming, according to a transform type selected from among a set of transform types, the input data into transform coefficients, quantizing the transform coefficients to generate the quantized transform coefficients, generating index information configured to identify the selected transform type among the set of transform types, determining information to be hidden, where the information to be hidden is at least a part of the index information, and hiding the information to be hidden in the quantized transform coefficients.

公开(公告)号：US12212778B2

公开(公告)日：2025-01-28

申请号：US17447952

申请日：2021-09-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Biao Wang ,  Semih Esenlik ,  Jianle Chen

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176

Abstract: Devices and methods for intra prediction of DC intra prediction mode are provided. The method includes: obtaining a value of an intra prediction reference line index of a transform block; obtaining prediction samples of the transform block based on reference samples from a reference line. The reference line is indexed by the value of the intra prediction reference line index. The method introduces a harmonization of MRL and non-directional intra prediction (i.e. DC). The harmonization consists of aligning the reference samples from a reference line, which is indexed by the value of the intra prediction reference line index.

公开(公告)号：US12166967B2

公开(公告)日：2024-12-10

申请号：US17702026

申请日：2022-03-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Konstantinovich Filippov ,  Haitao Yang ,  Huanbang Chen ,  Vasily Alexeevich Rufitskiy

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/46

Abstract: A computer-implemented method of determining whether an inter prediction process is enabled is disclosed in this application. The method includes obtaining an indication, where the indication indicates whether a slice-level weighted prediction mechanism is to be enabled in the inter prediction process. The method further includes determining, based on the indication, whether a non-rectangular merge mode or whether the slice-level weighted prediction mechanism is to be enabled in the inter prediction process. Furthermore, an encoder for encoding a data stream, like a video stream, using an inter prediction process and a decoder for decoding an encoded data stream, like an encoded video stream, using an inter prediction process, are disclosed.

公开(公告)号：US12041229B2

公开(公告)日：2024-07-16

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 ,  H04N19/132 ,  H04N19/169 ,  H04N19/174 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/174 ,  H04N19/1883 ,  H04N19/82

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.

公开(公告)号：US11902515B2

公开(公告)日：2024-02-13

申请号：US17408082

申请日：2021-08-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy

IPC: H04N19/117 ,  H04N19/593 ,  H04N19/82 ,  H04N19/13 ,  H04N19/59 ,  H04N19/196 ,  H04N19/42 ,  H04N19/157 ,  H04N19/184

CPC classification number: H04N19/117 ,  H04N19/13 ,  H04N19/157 ,  H04N19/184 ,  H04N19/196 ,  H04N19/439 ,  H04N19/59 ,  H04N19/593 ,  H04N19/82

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.

公开(公告)号：US11871033B2

公开(公告)日：2024-01-09

申请号：US17373347

申请日：2021-07-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/159 ,  H04N19/172 ,  H04N19/186

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/159 ,  H04N19/172 ,  H04N19/186

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.

公开(公告)号：US11870977B2

公开(公告)日：2024-01-09

申请号：US17503650

申请日：2021-10-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen

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

CPC classification number: 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.