公开(公告)号：US20220217330A1

公开(公告)日：2022-07-07

申请号：US17700786

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/105 ,  H04N19/187 ,  H04N19/172 ,  H04N19/70

Abstract: A method of decoding is provided. The method includes receiving a video bitstream including a plurality of layers, a video parameter set (VPS) specifying a plurality of output layer sets (OLSs) each including one or more layers from the plurality of layers, and a sequence parameter set (SPS) including a set of decoded picture buffer (DPB) parameters for each of the one or more layers only once when one or more of the one or more layers have been included in more than one of the plurality of OLSs; and decoding a picture from one of the plurality of layers to obtain a decoded picture. A corresponding method of encoding is also provided.

公开(公告)号：US11368729B2

公开(公告)日：2022-06-21

申请号：US17164838

申请日：2021-02-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huameng Fang ,  Yuqun Fan ,  Peiyun Di ,  Ye-Kui Wang

IPC: H04N21/2343 ,  H04N21/258 ,  H04N21/435 ,  H04N21/4402

Abstract: A media data transmission method and an apparatus. The method includes: A client sends first information to a server. The client receives video data packets that correspond to a second target video picture and that are sent by the server. The first information is used to indicate spatial information of a region in which a first target video picture is located, and the first target video picture includes a video picture within a current viewport. The second target video picture includes the first target video picture, at least one of the video data packets corresponding to the second target video picture carries at least one piece of second information, and the second information is used to indicate spatial information of a region in which the second target video picture is located.

公开(公告)号：US20220191533A1

公开(公告)日：2022-06-16

申请号：US17688249

申请日：2022-03-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/187 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more layers of coded pictures. A video parameter set (VPS) is also encoded into the bitstream. The VPS includes an each layer is an output layer set (OLS) flag (each_layer_is_an_ols_flag) when all layers specified by the VPS are independently coded without inter-layer prediction. The each_layer_is_an_ols_flag specifies whether each OLS contains only one layer. The bitstream is stored for communication toward a decoder.

公开(公告)号：US20220166970A1

公开(公告)日：2022-05-26

申请号：US17566464

申请日：2021-12-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/172

Abstract: A method of decoding includes receiving a coded video bitstream including a current picture; deriving a first reference picture list and a second reference picture list for each slice of the current picture; determining that the current picture is a clean random access (CRA) picture, the CRA picture signifying that there shall be no picture referred to by an entry in the first reference picture list or the second reference picture list that precedes, in an output order or a decoding order, any preceding intra random access point (IRAP) picture in the decoding order; and decoding each slice of the CRA picture based on one or both of the first reference picture list and the second reference picture list.

公开(公告)号：US20220124359A1

公开(公告)日：2022-04-21

申请号：US17562760

申请日：2021-12-27

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/46 ,  H04N19/102 ,  H04N19/597 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a sequence of point cloud compression (PCC) components into a bitstream. A buffering period supplemental enhancement information (SEI) message is also encoded into the bitstream. A hypothetical reference decoder (HRD) is initialized at a coded atlas access unit (AU) associated with the buffering period SEI message. A HRD conformance check of the bitstream is performed starting at the coded atlas AU. The bitstream is stored for communication toward a decoder.

公开(公告)号：US20220086432A1

公开(公告)日：2022-03-17

申请号：US17536621

申请日：2021-11-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a current picture and a reference picture list structure comprising an inter-layer reference picture flag. The mechanism determines an entry in the reference picture list structure associated with the current picture is an inter-layer reference picture (ILRP) entry based on the inter-layer reference picture flag. The current picture is decoded based on an inter-layer reference picture indicated by the entry in the reference picture list structure when the entry is the ILRP entry. The current picture is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20220060694A1

公开(公告)日：2022-02-24

申请号：US17520322

申请日：2021-11-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/107 ,  H04N19/70 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding into a bitstream a gradual decoding refresh (GDR) access unit (AU) and a buffering period (BP) supplemental enhancement information (SEI) message associated with the GDR AU. A hypothetical reference decoder (HRD) is initialized based on the BP SEI message. A HRD conformance test is performed on the bitstream using the HRD. The bitstream is stored for communication toward a decoder.

公开(公告)号：US20210409780A1

公开(公告)日：2021-12-30

申请号：US17471064

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

IPC: H04N19/70 ,  H04N19/44

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a flag and a plurality of sub-pictures associated with a picture. The plurality of sub-pictures are contained in a plurality of video coding layer (VCL) network abstraction layer (NAL) units. The mechanism determines that VCL NAL units of one or more of the sub-pictures of the picture all have a first particular value of NAL unit type and other VCL NAL units in the picture all have a different second particular value of NAL unit type based on a value of the flag. One or more of the sub-pictures are decoded based on the first particular value of NAL unit type and the second particular value of NAL unit type. One or more of the sub-pictures are forwarded for display as part of a decoded video sequence.

公开(公告)号：US20210409684A1

公开(公告)日：2021-12-30

申请号：US17470363

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

Abstract: A video coding mechanism includes receiving a bitstream comprising a current picture including a sub-picture coded according to inter-prediction. Coded blocks contain candidate motion vectors for a current block of the sub-picture. The coded blocks include a collocated block from a different picture. A candidate list of candidate motion vectors for the current block are derived by excluding collocated motion vectors from the candidate list when the collocated motion vectors are included in the collocated block, when the collocated motion vectors point outside of the sub-picture, and when a flag is set to indicate the sub-picture is treated as a picture. A current motion vector for the current block is determined from the candidate list of candidate motion vectors. The current block is decoded based on the current motion vector. The current block is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20210392381A1

公开(公告)日：2021-12-16

申请号：US17459779

申请日：2021-08-27

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/82 ,  H04N19/117 ,  H04N19/174 ,  H04N19/30

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a first adaptation parameter set (APS) network abstraction layer (NAL) unit including an adaptive loop filter (ALF) type, a second APS NAL unit including a scaling list type, a third APS NAL unit including a luma mapping with chroma scaling (LMCS) type, and a slice. The mechanism further includes obtaining ALF parameters from the first APS NAL unit, obtaining scaling list parameters from the second APS NAL unit, and LMCS parameters from the third APS NAL unit. The mechanism further includes decoding the slice using the ALF parameters, the scaling list parameters, and the LMCS parameter. The mechanism further includes forwarding the slice for display as part of a decoded video sequence.