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.

公开(公告)号：US20220329826A1

公开(公告)日：2022-10-13

申请号：US17837867

申请日：2022-06-10

Applicant: Lemon Inc.

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/70 ,  H04N19/147

Abstract: Example implementations include a method, apparatus and computer-readable medium of video processing, including constructing, during a conversion between a current video block of a video and a bitstream of the video, at least one template set for the current video block from a plurality of sub-templates. The one or more sub-templates may be selected from a plurality of sub-templates including: a left sub-template, an above sub-template, a right-above sub-template, a left-below sub-template, and a left-above sub-template. The implementations further include deriving at least one intra-prediction mode (IPM) based on cost calculations. The implementations include determining, based on the at least one IPM, a final predictor of the current video block. The implementations include performing the conversion based on the final predictor.

公开(公告)号：US20220239899A1

公开(公告)日：2022-07-28

申请号：US17161335

申请日：2021-01-28

Applicant: Lemon Inc.

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: Implementations of the present disclosure provide a solution for encoding and decoding motion information. In this solution, during a conversion between a current video block of a video and a bitstream of the video, a group type of a subgroup of candidates of motion information for the current video block is determined, wherein the group type indicating whether the subgroup of candidates are to be reordered. Further, a list of candidates are constructed based on the group type; and the motion information for the current video block is derived from the list of candidates.

公开(公告)号：US20220232241A1

公开(公告)日：2022-07-21

申请号：US17673660

申请日：2022-02-16

Applicant: Lemon Inc.

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

IPC: H04N19/50 ,  H04N19/70

Abstract: Aspects include a method, apparatus and computer-readable medium of decoding video or blocks of an image, including receiving a bitstream of the image, deriving, for a block of the image in the bitstream, multiple intra-prediction modes (IPMs) to use in decoding the block, determining, based on the multiple IPMs, a final predictor to use in decoding the block, and decoding the block using the final predictor. Other aspects include method, apparatus and computer-readable medium for similarly encoding video or blocks of an image.

公开(公告)号：US20220070497A1

公开(公告)日：2022-03-03

申请号：US17464415

申请日：2021-09-01

Applicant: Lemon Inc.

Inventor： Ye-Kui WANG ,  Li ZHANG

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/184 ,  H04N19/517

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 includes access units each consisting of one or more pictures each belonging to a layer according to a video coding format. The media file format specifies that image items comprising pictures originated from the bitstream are allowed to be associated with different instances of a property descriptor that indicates high-level characteristics of the bitstream.

公开(公告)号：US20220295075A1

公开(公告)日：2022-09-15

申请号：US17198194

申请日：2021-03-10

Applicant: Lemon Inc.

Inventor： Jizheng XU ,  Weijia ZHU ,  Li ZHANG

IPC: H04N19/156 ,  H04N19/513 ,  H04L29/06

Abstract: Example implementations include a method for video processing, comprising performing a conversion between a current video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies performing the conversion based on a predefined bitstream.

公开(公告)号：US20220286709A1

公开(公告)日：2022-09-08

申请号：US17187667

申请日：2021-02-26

Applicant: Lemon Inc.

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

IPC: H04N19/70 ,  H04N19/189 ,  H04N19/169 ,  H04N19/186 ,  H04N19/159

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 at least one base layer, and wherein the bitstream comprises first layer information which is utilized in a first process performed on the at least one base layer and second layer information which is utilized in a second process performed on the alpha layer.

公开(公告)号：US20220224915A1

公开(公告)日：2022-07-14

申请号：US17148383

申请日：2021-01-13

Applicant: Lemon Inc.

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

IPC: H04N19/159 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70

Abstract: Example implementations include a method, apparatus and computer-readable medium of video processing, including constructing, during a conversion between a current video block of a video and a bitstream of the video, at least one template set for the current video block from a plurality of sub-templates. The one or more sub-templates may be selected from a plurality of sub-templates including: a left sub-template, an above sub-template, a right-above sub-template, a left-below sub-template, and a left-above sub-template. The implementations further include deriving at least one intra-prediction mode (IPM) based on cost calculations. The implementations include determining, based on the at least one IPM, a final predictor of the current video block. The implementations include performing the conversion based on the final predictor.

公开(公告)号：US20220239897A1

公开(公告)日：2022-07-28

申请号：US17157706

申请日：2021-01-25

Applicant: Lemon Inc.

Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG

IPC: H04N19/103 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186

Abstract: Example implementations include a method, apparatus and computer-readable medium of video coding, comprising receiving the code block and one or more neighbor samples and determining the value of beta based on at least one of an average chroma value, a midrange chroma value, a median chroma value, an average luma value, a midrange luma value, or a median luma value of two or more neighbor samples.