公开(公告)号：US20220217390A1

公开(公告)日：2022-07-07

申请号：US17701407

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

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

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a coded picture into a bitstream. A current supplemental enhancement information (SEI) message that comprises a decoding unit (DU) hypothetical reference decoder (HRD) parameters present flag (du_hrd_params_present_flag) is also encoded into the bitstream. The du_hrd_params_present_flag specifies whether DU level HRD parameters are present in the bitstream. A set of bitstream conformance tests is performed on the bitstream based on the current SEI message. The bitstream is stored for communication toward a decoder.

公开(公告)号：US20220217369A1

公开(公告)日：2022-07-07

申请号：US17700845

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/187 ,  H04N19/172 ,  H04N19/136 ,  H04N19/11 ,  H04N19/593 ,  H04N19/107 ,  H04N19/46 ,  H04N19/43

Abstract: A method of decoding implemented by a video decoder is provided. The method includes receiving a bitstream including a coded video sequence start (CVSS) access unit (AU), wherein the CVSS AU contains a picture unit (PU) for each layer, and wherein a coded picture in each PU is a coded layer video sequence start (CLVSS) picture; identifying the coded picture from one of the layers based on a picture order count (POC) value; and decoding the coded picture to obtain a decoded picture.

公开(公告)号：US20220217359A1

公开(公告)日：2022-07-07

申请号：US17703368

申请日：2022-03-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/149 ,  H04N19/70 ,  H04N19/46 ,  H04N19/187 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more output layer sets (OLSs). A video parameter set (VPS) specifying the OLS is also encoded into the bitstream. The VPS comprises sequence-level hypothetical reference decoder (HRD) parameters that apply to all OLSs specified by the VPS. A set of bitstream conformance tests are performed based on the sequence-level HRD parameters. The bitstream is stored for communication toward a decoder.

公开(公告)号：US20220174290A1

公开(公告)日：2022-06-02

申请号：US17670708

申请日：2022-02-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang

IPC: H04N19/172 ,  H04N19/174 ,  H04N19/184 ,  H04N19/463

Abstract: An encoding device configured to encode a flag, that indicates whether tile information for a picture having a tile group is present in a parameter set of a video bitstream or in a slice header of the video bitstream, into the video bitstream, encode the tile information in the parameter set when the flag indicates the tile information for the picture is encoded in the parameter set, and encode the tile information in the slice header when the flag indicates the tile information for the picture is encoded in the slice header.

公开(公告)号：US11317087B2

公开(公告)日：2022-04-26

申请号：US17061405

申请日：2020-10-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ye-Kui Wang ,  Huameng Fang ,  Yuqun Fan ,  Jianle Chen

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/597 ,  H04N19/70 ,  H04N19/13 ,  H04N19/139 ,  H04N19/167 ,  H04N19/172 ,  H04N19/436 ,  H04N19/44 ,  H04N19/159 ,  G06T9/00 ,  G06T19/00

Abstract: A video coding mechanism for viewpoint dependent video coding is disclosed. The mechanism includes mapping a spherical video signal, stitched from multiple directional video signals, into a plurality of sub-picture video signals each containing a sequence of sub-pictures. The plurality of sub-picture video signals are encoded as a plurality of sub-picture bitstreams. The plurality of sub-picture bitstreams are composed into a plurality of sub-picture tracks to be compatible with a multi-bitstream merge function for reconstruction of the spherical video signal. A track level mergable indication is encoded within a track level box for the sub-picture tracks, which indicates the sub-picture tracks are compatible with the multi-bitstream merge function for reconstruction of the spherical video signal.

公开(公告)号：US11272223B2

公开(公告)日：2022-03-08

申请号：US17198901

申请日：2021-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  F N U Hendry ,  Jianle Chen

IPC: H04N19/96 ,  H04N19/46 ,  H04N19/169 ,  H04N19/119 ,  H04N19/174 ,  H04N19/184 ,  H04N19/70 ,  H04N19/176

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.

公开(公告)号：US20220060726A1

公开(公告)日：2022-02-24

申请号：US17518234

申请日：2021-11-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang

IPC: H04N19/436 ,  H04N19/96 ,  H04N19/13 ,  H04N19/196 ,  H04N19/174

Abstract: A method of decoding includes encountering an end of tile bit with a first value and byte alignment bits in a video bitstream, which indicate that a current coding tree block (CTB) is a last CTB in a tile; encountering an end of CTB row bit with the first value and the byte alignment bits in the video bitstream, which indicate that waveform parallel processing (WPP) is enabled and that the current CTB is the last CTB in a CTB row but not the last CTB in the tile; and reconstructing the plurality of CTBs in the tile based on the end of tile bit with the first value, the end of CTB row bit with the first value, and the byte alignment bits.

公开(公告)号：US20220021896A1

公开(公告)日：2022-01-20

申请号：US17492352

申请日：2021-10-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang

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

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a flag and a plurality of coded pictures including an intra random access point (IRAP) picture and one or more non-leading pictures associated with the IRAP picture. When the flag is set to a first value any leading pictures associated with the IRAP picture precede, in decoding order, all non-leading pictures associated with the IRAP picture. When the flag is set to a second value a non-leading picture precedes, in decoding order, an initial leading picture associated with the IRAP picture. The IRAP picture, any leading pictures associated with the IRAP picture, and the one or more non-leading pictures associated with the IRAP picture are decoded in decoding order based on the flag.

公开(公告)号：US20210409703A1

公开(公告)日：2021-12-30

申请号：US17470407

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/174 ,  H04N19/86 ,  H04N19/119

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a flag and a picture including a tile with a tile boundary. The tile is decoded. Filtering operations are performed across the tile boundary when the flag is set to a first value. The filtering operations across the tile boundary are omitted when the flag is set to a second value. The tile is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20210409690A1

公开(公告)日：2021-12-30

申请号：US17470791

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/107 ,  H04N19/172 ,  H04N19/169 ,  H04N19/30 ,  H04N19/46

Abstract: A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes the video decoder determining whether a gradual decoding refresh (GDR) picture in the coded video bitstream is an initial picture in decoding order or the initial picture following an end of sequence (EOS) network abstraction layer (NAL) unit in the decoding order; setting a flag to a value to prevent the GDR picture from being output when the GDR picture is the initial picture in decoding order or the initial picture following the EOS NAL unit in the decoding order; decoding the GDR picture; and storing the GDR picture in a decoded picture buffer (DPB).