公开(公告)号：US20230199227A1

公开(公告)日：2023-06-22

申请号：US18172174

申请日：2023-02-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Roman Igorevich Chernyak ,  Kamilla Railevna DAVLETSHINA ,  Sergey Yurievich Ikonin ,  Elena Alexandrovna Alshina

IPC: H04N19/80 ,  H04N19/60 ,  H04N19/182 ,  H04N19/176

CPC classification number: H04N19/80 ,  H04N19/60 ,  H04N19/182 ,  H04N19/176

Abstract: A method of coding is implemented by a decoding device, the method includes: receiving a bitstream, and obtaining from the bitstream, a first luma bit depth value of luma samples of a current picture. The method also includes performing a Hadamard Transform Domain Filtering (HTDF) post reconstruction filtering of a block of the current picture by using a lookup table based on the obtained first luma bit depth value.

公开(公告)号：US20230129504A1

公开(公告)日：2023-04-27

申请号：US18076200

申请日：2022-12-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Semih Esenlik ,  Max Blaeser ,  Zhijie Zhao ,  Han Gao ,  Anand Meher Kotra ,  Biao Wang ,  Elena Alexandrovna Alshina

IPC: H04N19/119 ,  H04N19/105 ,  H04N19/184 ,  H04N19/176

Abstract: A method of coding implemented by a decoding device, comprising obtaining a bitstream; obtaining a value of an indicator for a current block according to the bitstream; obtaining a value of a first parameter for the current block and a value of a second parameter for the current block, according to the value of the indicator and a predefined lookup table; obtaining a value of a sample distance for a sample which is located in the current block, according to the value of the first parameter and the value of the second parameter; obtaining a prediction value for the sample, according to the value of the sample distance for the sample.

公开(公告)号：US20230069953A1

公开(公告)日：2023-03-09

申请号：US17987676

申请日：2022-11-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hu Chen ,  Lars Hertel ,  Erhardt Barth ,  Thomas Martinetz ,  Elena Alexandrovna Alshina ,  Anand Meher Kotra ,  Nicola GIULIANI

IPC: G06T5/00 ,  G06T3/40 ,  G06N3/08 ,  G06N3/04

Abstract: A method and apparatus are provided for processing with a trained neural network, and for training of such neural network for image modification, which relate to image processing and in particular to modification of an image using the processing such as the neural network. The processing is performed to generate an output image. The output image is generated by processing the input image with the neural network. The processing with the neural network includes at least one stage including image down-sampling and filtering of the down-sampled image and at least one stage of image up-sampling. The image down-sampling is performed by applying a strided convolution. According to the application, efficiency of the neural network is increased, which may lead to faster learning and improved performance.

公开(公告)号：US20230054477A1

公开(公告)日：2023-02-23

申请号：US17982046

申请日：2022-11-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hu Chen ,  Yichuan Wang ,  Weiwei Xu ,  Quanhe Yu ,  Elena Alexandrovna Alshina

IPC: G06T5/00 ,  G06T5/10

Abstract: The present disclosure relates generally to the field of video processing, and more particularly, to high dynamic range (HDR) image processing. In particular, the present disclosure relates to a method for determining a parameter set for a tone mapping curve. The method comprises obtaining a plurality of parameter sets, wherein each parameter set defines the tone mapping curve, and wherein each parameter set is derived based on one of a plurality of HDR video frames. Further, the method comprises temporally filtering the plurality of parameter sets to obtain a temporally filtered parameter set.

公开(公告)号：US20230050102A1

公开(公告)日：2023-02-16

申请号：US17976666

申请日：2022-10-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  Friedrich-Alexander-Universität Erlangen-Nürnberg

Inventor： Fabian Brand ,  Jürgen Seiler ,  André KAUP ,  Elena Alexandrovna Alshina ,  Semih Esenlik

IPC: H04N19/137 ,  H04N19/167 ,  H04N19/132

Abstract: The present disclosure relates to an apparatus and a method for providing a plurality of motion vectors related to an image coded in a bitstream, comprising obtaining a set of sample positions within the image, obtaining respective motion vectors associated with the set of sample positions, deriving an additional motion vector based on information coded in the bitstream, determining an additional sample position located within a triangle, which is formed by three sample positions of the set of sample positions, based on the respective motion vectors associated with the three sample positions, the triangle not including any other sample position of the set, adding the additional sample position to the set of sample positions, and associating the derived additional motion vector with the additional sample position. Such method and apparatus provide for an efficient motion flow compression and reconstruction enabling to recover some sample positions without signaling them in the bitstream.

公开(公告)号：US20220329794A1

公开(公告)日：2022-10-13

申请号：US17847556

申请日：2022-06-23

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/117 ,  H04N19/70 ,  H04N19/186 ,  H04N19/174

Abstract: A method in an image encoding and/or an image decoding, in which picture header entries for a cross-component adaptive loop filter (CC-ALF) are introduced which defines the common CC-ALF data and all the slices inherit this common information. The signaling overhead, in particular, the overhead of the slice header (in terms of number of bits) is reduced.

公开(公告)号：US20220224923A1

公开(公告)日：2022-07-14

申请号：US17701105

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/196 ,  H04N19/137 ,  H04N19/105 ,  H04N19/176

Abstract: A method of an inter prediction process performed by a processing unit of a coding system comprises deriving combined linear combination parameters from two sets of linear combination parameters, where a first set of linear combination parameters is independent from the position of the to-be-predicted block and a second set of linear combination parameters depends on the position of the to-be-predicted block; and obtaining the value of the to-be-predicted sample using the combined linear combination parameters and predicted values of at least two samples belonging to different reference blocks of the to-be-predicted block.

公开(公告)号：US11388422B2

公开(公告)日：2022-07-12

申请号：US17478534

申请日：2021-09-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: H04N19/159 ,  H04N19/196 ,  H04N19/176 ,  H04N19/105

Abstract: A method of coding implemented by a decoding device or an encoding device, comprising obtaining indication information for a luma position (cbWidth/2, cbHeight/2) of a current coding block, relative to a top-left luma sample postion (xCb, yCb) of the current coding block; setting a value of a luma intra prediction mode associated with the current coding block to a first default value, when the indication information indicates that a Matrix-based Intra Prediction (MIP) is applied for the luma component at the luma position (cbWidth/2, cbHeight/2), relative to the top-left luma sample postion (xCb, yCb) of the current coding block; and obtaining a value of a chroma intra prediction mode based on the value of the luma intra prediction mode of the current coding block.

公开(公告)号：US20220174326A1

公开(公告)日：2022-06-02

申请号：US17678253

申请日：2022-02-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Timofey Mikhailovich Solovyev ,  Maxim Borisovitch Sychev ,  Huanbang Chen ,  Alexander Alexandrovich Karabutov ,  Roman Igorevich Chernyak ,  Sergey Yurievich Ikonin ,  Haitao Yang ,  Elena Alexandrovna Alshina

IPC: H04N19/80 ,  H04N19/139 ,  H04N19/176 ,  H04N19/105 ,  H04N19/132 ,  H04N19/172 ,  H04N19/117 ,  H04N19/61 ,  H04N19/122 ,  H04N19/85

Abstract: A method for coding a video implemented in an encoder or a decoder including the enhanced interpolation filter, EIF, for motion compensation, the method comprising: i) determining control point motion vectors, CPMVs, for a block according to affine inter-prediction, the block being an affine block or a sub-block of the affine block; ii) for a predefined sub-block size determining a reference area for a sub-block with the predefined sub-block size according to values of the CPMVs; iii) comparing the determined reference area with a predefined threshold; iv) applying EIF for motion compensation, comprising deriving the pixel-based motion vector field for the block; wherein if the determined reference area is larger than the threshold, deriving the pixel-based motion vector field for the block further comprises motion vector clipping, wherein motion vector clipping range is determined based on motion model of the block and the size of the block.

公开(公告)号：US20220116620A1

公开(公告)日：2022-04-14

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

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.