公开(公告)号：US20220295090A1

公开(公告)日：2022-09-15

申请号：US17200632

申请日：2021-03-12

Applicant: Lemon Inc.

Inventor： Na ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Li ZHANG ,  Yue WANG

IPC: H04N19/513 ,  H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176

Abstract: Embodiments of the present disclosure provide methods, apparatuses and computer storage media for video processing. One example method comprises determining, during a conversion between a current video block of a video and a bitstream of the video, a motion candidate for the current video block; refining the motion candidate by performing a local search around the motion candidate based on a template matching cost rule; and performing the conversion based on the refined motion candidate, wherein a search order of the local search is related to a coding mode of the current video block.

公开(公告)号：US20220237741A1

公开(公告)日：2022-07-28

申请号：US17157694

申请日：2021-01-25

Applicant: Lemon Inc.

Inventor： Wenbin YIN ,  Haibin YIN ,  Li ZHANG ,  Huade SHI

IPC: G06T3/40 ,  G06T9/00 ,  G06T5/00 ,  G06T5/50 ,  H04N19/33 ,  H04N19/117 ,  H04N19/46 ,  H04N19/176

Abstract: Implementations of the present disclosure provide a solution for image/video processing. In this solution, an intermediate image can be obtained from an LR image. Then, a smooth value associated with an image block in the intermediate image could be determined based on a gradient of a target pixel in the image block. Further, an HR image can be generated from the intermediate image based on the smooth value. In this way, the filtering process can be performed based on a smooth value of an image block, thereby improving the efficiency of image/video processing and lowering down the computational and memory costs.

公开(公告)号：US20220224913A1

公开(公告)日：2022-07-14

申请号：US17148533

申请日：2021-01-13

Applicant: Lemon Inc.

Inventor： Yang WANG ,  Kai ZHANG ,  Li ZHANG ,  Yuwen HE ,  Hongbin LIU

IPC: H04N19/146 ,  H04N19/11 ,  H04N19/159 ,  H04N19/132 ,  H04N19/176

Abstract: Aspects of the present disclosure provide techniques for derive one or more intra prediction modes (IPMs) from a subset of IPM candidates in order to determine a predictor to use for decoding a block of an image. In some aspects, the subset of IPM candidates may include IPMs that are less than the number of IPMs in a full set of all available IPM candidates (e.g., 67 IPMs in VVC or 35 in HEVC). In some aspects, the subset of IPM candidates may be based on a most probable mode (MPM) list that can be used to determine or signal an IPM based on IPMs previously used in decoding other blocks.

公开(公告)号：US20220295089A1

公开(公告)日：2022-09-15

申请号：US17200631

申请日：2021-03-12

Applicant: Lemon Inc.

Inventor： Na ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Li ZHANG ,  Yue WANG

IPC: H04N19/513 ,  H04N19/137 ,  H04N19/105 ,  H04N19/46 ,  H04N19/176

Abstract: Embodiments of the present disclosure provide methods, apparatuses and computer storage media for video processing. One example method comprises determining, during a conversion between a current video block of a video and a bitstream of the video, at least one set of motion candidates for the current video block, each motion candidate comprising predicted motion information determined from neighboring video blocks of the current video block; determining, based on a template of the current video block and from the at least one set of motion candidates, a target motion candidate for the current video block by using a template matching cost rule; and performing the conversion based on the target motion candidate.

公开(公告)号：US20220295088A1

公开(公告)日：2022-09-15

申请号：US17200628

申请日：2021-03-12

Applicant: Lemon Inc.

Inventor： Na ZHANG ,  Kai ZHANG ,  Hongbin LIU ,  Li ZHANG ,  Yue WANG

IPC: H04N19/513 ,  H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: Embodiments of the present disclosure provide methods, apparatuses and computer storage media for video processing. One example method comprises determining, during a conversion between a current video block of a video and a bitstream of the video, a set of motion candidates for the current video block; determining, for each motion candidate in the set of motion candidates, a refined motion candidate by performing a local search around the each motion candidate based on a template matching cost rule; determining, from a set of refined motion candidates generated for the set of motion candidates, a target motion candidate for the current video block; and performing the conversion based on the target motion candidate.

公开(公告)号：US20220286666A1

公开(公告)日：2022-09-08

申请号：US17187674

申请日：2021-02-26

Applicant: Lemon Inc.

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG ,  Yue WANG

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/513

Abstract: Example implementations include a method, apparatus and computer-readable medium of video coding, comprising performing a conversion between a video comprising a plurality of pictures and a bitstream of the video, wherein each picture comprises an alpha layer and a base layer, and wherein the bitstream comprises a current block in the alpha layer of a current picture that is predicted from one or more reference blocks in the base layer.

公开(公告)号：US20220279185A1

公开(公告)日：2022-09-01

申请号：US17187670

申请日：2021-02-26

Applicant: Lemon Inc.

Inventor： Weijia ZHU ,  Jizheng XU ,  Li ZHANG ,  Yue WANG

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/169 ,  H04N19/132 ,  H04N19/105 ,  H04N19/82 ,  H04N19/117 ,  H04N19/186

Abstract: Example implementations include a method, apparatus and computer-readable medium of video coding, comprising determining, for a conversion between a video comprising a plurality of pictures and a bitstream of the video, first layer information which is utilized in a first process performed on a first layer of each picture. The implementations further include determining, second layer information which is utilized in a second process performed on a second layer of each picture. Additionally, the implementations further include performing the conversion for the second layer based on the first layer information and the second layer information.

公开(公告)号：US20220101095A1

公开(公告)日：2022-03-31

申请号：US17487852

申请日：2021-09-28

Applicant: Lemon Inc.

Inventor： Yue LI ,  Li ZHANG ,  Kai ZHANG

IPC: G06N3/04 ,  H04N19/117 ,  H04N19/184 ,  H04N19/157

Abstract: Methods, systems, apparatus for media processing are described. One example method of digital media processing includes performing a conversion between visual media data and a bitstream of the visual media data, wherein the performing of the conversion includes selectively applying a convolutional neural network filter during the conversion based on a rule, and wherein the rule specifies whether and/or how the convolutional neural network filter is applied.

公开(公告)号：US20220070496A1

公开(公告)日：2022-03-03

申请号：US17464311

申请日：2021-09-01

Applicant: Lemon Inc.

Inventor： Ye-Kui WANG ,  Li ZHANG

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/593 ,  H04N19/30 ,  H04N19/169

Abstract: Systems, methods and apparatus for processing image data are described. One example method includes performing a conversion between a visual media file and a bitstream. The visual media file comprises image items each comprising a sequence of one or more pictures according to a media file format, and the bitstream comprises access units each comprising one or more pictures each belonging to a layer according to a video coding format. The video coding format defines multiple profiles. The media file format specifies that the bitstream is represented in a file having a specific brand, and that one or more profiles used for representing the video in the bitstream are agnostic of the specific brand.

公开(公告)号：US20220070495A1

公开(公告)日：2022-03-03

申请号：US17464364

申请日：2021-09-01

Applicant: Lemon Inc.

Inventor： Ye-Kui WANG ,  Li ZHANG

IPC: H04N19/67 ,  H04N19/159 ,  H04N19/107

Abstract: Systems, methods and apparatus for processing image data are described. One example method includes performing a conversion between a visual media file and a bitstream. The visual media file comprises a sequence of one or more pictures according to a media file format, and the bitstream comprises one or more access units according to a video coding format. The bitstream is coded according to the video coding format. The media file format specifies that an image item of a specific type value in the visual media file includes a single access unit of the bitstream. The single access unit is either an Intra Random Access Picture (IRAP) access unit or a Gradual Decoding Refresh (GDR) access unit according to the video coding format. All pictures in the GDR access unit are identified as a recovery point in the bitstream.