公开(公告)号：US20180220148A1

公开(公告)日：2018-08-02

申请号：US15933974

申请日：2018-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Sergey Yurievich IKONIN ,  Maxim Borisovitch SYCHEV ,  Victor Alexeevich STEPIN ,  Roman CHERNYAK

IPC: H04N19/51 ,  H04N19/82 ,  H04N19/176

CPC classification number: H04N19/51 ,  H04N19/176 ,  H04N19/523 ,  H04N19/82

Abstract: The present disclosure relates to a video coder for predictive coding a video stream of subsequent frames according to motion compensation into an encoded video bit stream, comprising a frame buffer configured to store at least one reference frame of the video stream, a prediction unit configured to generate a prediction block of a current block of a current frame from a reference block of the reference frame according to a motion vector having fractional-pel resolution, the fractional-pel resolution defining an integer-pel position and fractional-pel positions. The prediction unit is configured to interpolate the reference block according to the fractional-pel resolution via one of the at least three following interpolation filters: a blurring interpolation filter, a tap filter, and the tap filter followed by a sharpening filter.

公开(公告)号：US20200267409A1

公开(公告)日：2020-08-20

申请号：US16807994

申请日：2020-03-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Victor Alexeevich STEPIN ,  Roman Igorevich CHERNYAK ,  Ruslan Faritovich MULLAKHMETOV

IPC: H04N19/557 ,  H04N19/117 ,  H04N19/137 ,  H04N19/176 ,  H04N19/82

Abstract: The present disclosure relates to the iterative fast-search of more than one identified best blocks, corresponding to best patches within a search area, by early termination of the subblock iteration through comparison of a similarity measure to a similarity threshold. In particular, the positions of K-best matched-blocks, divided into multiple subblocks, are found for a reference block within an image search area. By performing subblock-based iterative calculations of the similarity measure between a block at a current position and the reference block within a search area, the iteration progresses as long as the similarity measure value remains larger than a threshold value, and the positions of the K-best patches are recorded in a storage medium, whereas the subblock iteration terminates when the similarity measure value is lower than the threshold value.

公开(公告)号：US20180220162A1

公开(公告)日：2018-08-02

申请号：US15934628

申请日：2018-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Maxim Borisovitch SYCHEV ,  Victor Alexeevich STEPIN ,  Sergey Yurievich IKONIN

IPC: H04N19/82 ,  H04N19/51 ,  G06T5/00 ,  H04N19/44 ,  H04N19/117 ,  H04N19/13 ,  H04N19/176

CPC classification number: H04N19/82 ,  G06T5/003 ,  G06T2207/20201 ,  H04N19/117 ,  H04N19/13 ,  H04N19/14 ,  H04N19/176 ,  H04N19/33 ,  H04N19/44 ,  H04N19/50 ,  H04N19/51

Abstract: The present disclosure relates to a video coder for predictive coding, into an encoded video bit stream, of an original block of an original frame based on a prediction block obtained from a reference frame, comprising a buffer configured to store the original block, a buffer configured to store the prediction block, and an adaptive sharpening filter configured to apply a spatial adaptive sharpening filtering to the prediction block.

公开(公告)号：US20210152821A1

公开(公告)日：2021-05-20

申请号：US17139886

申请日：2020-12-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Sergey Yurievich IKONIN ,  Victor Alexeevich STEPIN ,  Dmitry Yurievich KURYSHEV ,  Jianle Chen ,  Roman Igorevich CHERNYAK

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/129 ,  H04N19/105 ,  H04N19/176 ,  G06F1/03

Abstract: A filter for video coding is provided, where the filter is configured for processing a block for generation of a filtered block, and the block comprises a plurality of pixels. The filter includes one or more processor configured to: obtain a quantization parameter (QP) of the block; obtain a threshold (THR) based on the QP; and obtain a look up table based on QP, so as to generate a filtered block based on the threshold and the look up table. The filter is provided allowing improving the efficiency for video coding.

公开(公告)号：US20200275131A1

公开(公告)日：2020-08-27

申请号：US15931341

申请日：2020-05-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Victor Alexeevich STEPIN ,  Roman Igorevich CHERNYAK ,  Sergey Yurievich IKONIN

IPC: H04N19/82 ,  H04N19/51 ,  H04N19/176 ,  H04N19/117 ,  H04N19/182 ,  H04N19/124 ,  H04N19/147

Abstract: The disclosure relates to an in-loop filter apparatus for video coding, which is configured for processing a reconstructed frame corresponding to a current frame for generation of a filtered reconstructed frame, wherein the reconstructed frame comprises a plurality of pixels, each pixel being associated with a pixel value. The in-loop filter apparatus comprises a processing unit configured to: partition the reconstructed frame into a plurality of overlapping and/or non-overlapping 2D pixel blocks; generate for each 2D pixel block a 2D spectrum by applying a 2D transform to the 2D pixel block, wherein the 2D spectrum comprises a plurality of spectral components; generate for each 2D pixel block a filtered 2D spectrum by multiplying each spectral component with a respective gain coefficient, wherein the respective gain coefficient depends on the respective spectral component and/or one or more neighboring spectral components of the respective spectral component and one or more filtering parameters; generate for each 2D pixel block a filtered 2D pixel block by applying an inverse 2D transform to the filtered 2D spectrum; and generate the filtered reconstructed frame on the basis of the plurality of filtered 2D pixel blocks.

公开(公告)号：US20190394464A1

公开(公告)日：2019-12-26

申请号：US16422428

申请日：2019-05-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Victor Alexeevich STEPIN ,  Roman Igorevich CHERNYAK ,  Ruslan Faritovich MULLAKHMETOV

IPC: H04N19/117 ,  H04N19/124 ,  H04N19/50 ,  H04N19/154 ,  H04N19/176 ,  H04N19/61 ,  H04N19/82

Abstract: A video coding apparatus is described for encoding or decoding a frame of a video, the video coding apparatus comprising a computer program code and a processor configured to carry out operations on the frame of video. The operations include reconstructing the frame, and determining one or more filter parameters and filtering in a frequency domain and a pixel domain a block of the reconstructed frame based on the determined filter parameters to obtain a filtered block of the frame. The determining the one or more filter parameters and filtering in a frequency domain based on the determined filter parameters is performed jointly within a loop, and the one or more filter parameters are based on one or more first parameters that are based on the reconstructed frame and one or more second parameters which are based on a codec signaling information.

公开(公告)号：US20190313124A1

公开(公告)日：2019-10-10

申请号：US16448956

申请日：2019-06-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Victor Alexeevich STEPIN ,  Roman Igorevich CHERNYAK ,  Albert Yurievich SILANTIEV

IPC: H04N19/635 ,  G06T9/00 ,  H04N19/117 ,  H04N19/147 ,  H04N19/196 ,  H04N19/172

Abstract: An image coding apparatus, comprising an image reconstruction unit configured to reconstruct an image, a parameter determination unit configured to determine one or more filter parameters, based on one or more first parameters which are based on the reconstructed image and one or more second parameters which are based on codec signaling information, and a mixed-domain filtering unit configured to filter in a frequency domain and a pixel domain the reconstructed image based on the determined filter parameters to obtain a filtered image.

公开(公告)号：US20180213261A1

公开(公告)日：2018-07-26

申请号：US15934546

申请日：2018-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Sergey Yurievich IKONIN ,  Maxim Borisovitch SYCHEV ,  Victor Alexeevich STEPIN

IPC: H04N19/82 ,  H04N19/51 ,  G06T5/00 ,  H04N19/44 ,  H04N19/117 ,  H04N19/176

CPC classification number: H04N19/82 ,  G06T5/003 ,  G06T2207/20201 ,  H04N19/117 ,  H04N19/176 ,  H04N19/44 ,  H04N19/50 ,  H04N19/51 ,  H04N19/523

Abstract: The present disclosure relates to a video coder for predictive coding a video stream of subsequent frames according to motion compensation into an encoded video bit stream, comprising a frame buffer (207) adapted to store at least one reference frame of the video stream, said reference frame being different from a current frame of the video stream, an inter prediction unit (210) adapted to generate a prediction block of a current block of the current frame from a reference block of the reference frame, and a sharpening filter (211) adapted to filter the prediction block.

公开(公告)号：US20180213250A1

公开(公告)日：2018-07-26

申请号：US15934043

申请日：2018-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Sergey Yurievich IKONIN ,  Maxim Borisovitch SYCHEV ,  Victor Alexeevich STEPIN

IPC: H04N19/51 ,  H04N19/82 ,  G06T5/00 ,  H04N19/117 ,  H04N19/44 ,  H04N19/176

Abstract: The present disclosure relates to a video coder for predictive coding a video stream of subsequent frames according to motion compensation into an encoded video bit stream, comprising a frame buffer adapted to store at least one reference frame of the video stream, the reference frame being different from a current frame of the video stream, an inter prediction unit adapted to generate a prediction block of a current block of the current frame from a reference block of the reference frame, and an adaptive sharpening filter configured to adaptively filter the prediction block.

公开(公告)号：US20220116598A1

公开(公告)日：2022-04-14

申请号：US17561087

申请日：2021-12-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Victor Alexeevich STEPIN ,  Sergey Yurievich IKONIN ,  Elena Alexandrovna ALSHINA

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/172 ,  H04N19/136 ,  H04N19/196

Abstract: A method for in-loop filtering by performing adaptive loop filtering on a reconstructed frame of a video stream, implemented by an encoding device or a decoding device, the method comprising forming differences between a pixel of the reconstructed frame and neighboring pixels in a connected area of the pixel, clipping the differences according to respective clipping levels, forming a weighted sum of the clipped differences, and adding the weighted sum to the pixel to determine a filtered pixel, wherein the respective clipping levels are chosen from a same set of clipping levels for the luma and chroma components.