公开(公告)号：US20220210477A1

公开(公告)日：2022-06-30

申请号：US17696485

申请日：2022-03-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/70 ,  H04N19/172

Abstract: A method of video decoding comprises receiving a bitstream including a SPS, a PPS, and subpictures associated with a subpicture ID mapping. A determination is made of whether an SPS flag has a first or second value. The SPS flag having the first value specifies that the subpicture ID mapping is signaled in the SPS, and the second value specifies that the subpicture ID mapping is signaled in the PPS. The subpicture ID mapping is obtained from the SPS when the SPS flag has the first value and from the PPS when the SPS flag has the second value or the PPS flag has the first value.

公开(公告)号：US20220060733A1

公开(公告)日：2022-02-24

申请号：US17518275

申请日：2021-11-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/159 ,  H04N19/169 ,  H04N19/176

Abstract: A method of decoding a coded video bitstream is provided. The method includes receiving the coded video bitstream, wherein the coded video bitstream contains a clean random access (CRA) picture and a first flag having a first value; setting a second value of a second flag equal to the first value of the first flag; emptying, by the video decoder, any previously-decoded pictures from a decoded picture buffer (DPB) based on the second flag having the second value; and decoding a current picture after the DPB has been emptied. A corresponding method of encoding is also provided.

公开(公告)号：US20210392361A1

公开(公告)日：2021-12-16

申请号：US17358491

申请日：2021-06-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/169 ,  H04N19/172 ,  H04N19/593

Abstract: A method of encoding a video bitstream implemented by a video encoder is disclosed. The method includes storing, in a memory of the video encoder, a set of less than five network abstraction layer (NAL) unit types available for video data; selecting, by a processor of the video encoder, a NAL unit type from the set of less than five NAL unit types for a picture from the video data; generating, by the processor of the video encoder, a video bitstream containing a NAL unit corresponding to the NAL unit type selected and containing an identifier identifying the NAL unit type selected; and transmitting, by a transmitter of the video encoder, the video bitstream toward a video decoder. A corresponding method of decoding the video bitstream is also disclosed.

公开(公告)号：US20210392323A1

公开(公告)日：2021-12-16

申请号：US17459789

申请日：2021-08-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry ,  Jinale Chen

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/187 ,  H04N19/174

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a slice and a plurality of adaptation parameter sets (APSs) including a plurality of APS types, wherein each APS includes an APS identifier (ID), and wherein APS IDs for the APS types are assigned in sequence over a plurality of different value spaces. The mechanism further includes decoding the slice using parameters from the plurality of APSs. The mechanism further includes forwarding the slice for display as part of a decoded video sequence.

公开(公告)号：US20210344903A1

公开(公告)日：2021-11-04

申请号：US17370120

申请日：2021-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lu Yu ,  Ye-Kui Wang ,  Hualong Yu ,  Yin Zhao ,  Yuqun Fan ,  Xiaoding Gao ,  Haitao Yang

IPC: H04N19/105 ,  H04N19/46 ,  H04N19/184 ,  H04N19/172

Abstract: A video encoding method, a video decoding method, an apparatus, a device, and a storage medium include parsing a first flag from the video bitstream when a video bitstream is allowed to be decoded by referencing a library picture corresponding to a library picture bitstream, using a value of a target parameter of the video bitstream as a value of a target parameter of the library picture bitstream referenced by the video bitstream when a value of the first flag is a first value, and reconstructing, based on the value of the target parameter of the library picture bitstream referenced by the video bitstream and the library picture bitstream referenced by the video bitstream to obtain the library picture corresponding to the library picture bitstream referenced by the video bitstream.

公开(公告)号：US20210337227A1

公开(公告)日：2021-10-28

申请号：US17370887

申请日：2021-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

IPC: H04N19/44 ,  H04N19/132 ,  H04N19/169 ,  H04N19/174

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a sequence parameter set (SPS), one or more sub-pictures partitioned from a picture, and one or more slice headers associated with one or more slices. The SPS is parsed to obtain sub-picture identifiers (IDs) for the one or more sub-pictures. The slice headers are parsed to obtain a current sub-picture ID associated with a current sub-picture. The current sub-picture ID indicating the slices are included in the current sub-picture of the one or more sub-pictures. The current sub-picture is decoded based on the current sub-picture ID to create a video sequence. The video sequence is forwarded for display.

公开(公告)号：US20210329305A1

公开(公告)日：2021-10-21

申请号：US17362723

申请日：2021-06-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Maxim Borisovitch Sychev ,  FNU Hendry ,  Ye-Kui Wang

IPC: H04N19/70 ,  H04N19/136 ,  H04N19/184 ,  H04N19/174

Abstract: The present disclosure provides an encoding and decoding device, as well as an encoding and decoding method. In particular, the present disclosure relates to method for decoding of a video bitstream implemented by a decoding device, wherein the video bitstream includes data representing a coded picture comprising tile columns, the decoding method comprising: obtaining a syntax element by parsing the video bitstream, wherein the syntax element is used to derive the width of the tile columns, wherein the width of the tile columns is uniform; predicting the picture according the width of the tile columns.

公开(公告)号：US20210211664A1

公开(公告)日：2021-07-08

申请号：US17199055

申请日：2021-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry ,  Jianle Chen

IPC: H04N19/119 ,  H04N19/184 ,  H04N19/174 ,  H04N19/70 ,  H04N19/96

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream including a first slice of a coded image. The coded image is associated with a picture parameter set (PPS) in the bitstream. The first slice is associated with a slice header in the bitstream. A list of identifiers (IDs) is parsed from the PPS. A first ID is parsed from the slice header of the first slice. The first ID matches one of the IDs in the list of IDs in the PPS. A list of tiles coded in the first sliceis determined based on the first ID. The first slice is determined to generate a reconstructed sub-image of the coded image.

公开(公告)号：US20210211662A1

公开(公告)日：2021-07-08

申请号：US17198961

申请日：2021-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry ,  Jianle Chen

IPC: H04N19/119 ,  H04N19/174 ,  H04N19/176 ,  H04N19/169

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream including image data coded in a plurality of slices. A top left tile identifier (ID) and a bottom right tile ID of a first slice are determined. Boundaries of the first slice are determined based on the top left tile ID and the bottom right tile ID. The first slice is decoded to generate a reconstructed image based on the boundaries of the first slice.

公开(公告)号：US20210204000A1

公开(公告)日：2021-07-01

申请号：US17198901

申请日：2021-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry ,  Jianle Chen

IPC: H04N19/96 ,  H04N19/184 ,  H04N19/70

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving at a decoder, a bitstream including a video coding layer (VCL) network abstraction layer (NAL) unit containing a slice of image data divided into a plurality of tiles. A number of the tiles in the VCL NAL unit are determined. A number of entry point offsets for the tiles is also determined as one less than the number of the tiles in the VCL NAL unit. Each entry point offset indicates a starting location of a corresponding tile in the VCL NAL unit. The number of entry point offsets is not explicitly signaled in the bitstream. The entry point offsets for the tiles are obtained based on the number of entry point offsets. The tiles are decoded at the entry point offsets to generate a reconstructed image.