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    Scalable Nesting SEI Messages For Specified Layers
    173.
    发明申请
    Scalable Nesting SEI Messages For Specified Layers 有权

    公开(公告)号：US20250080774A1

    公开(公告)日：2025-03-06

    申请号：US18916676

    申请日：2024-10-15

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Ye-Kui Wang

    IPC: H04N19/70 ,  H04N19/169 ,  H04N19/172 ,  H04N19/187 ,  H04N19/30 ,  H04N19/46

    Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more layers. A scalable nesting supplemental enhancement information (SEI) message is encoded into the bitstream in a current SEI network abstraction layer (NAL) unit. The scalable nesting SEI message contains one or more scalable-nested SEI messages and one or more scalable nesting layer identifiers (Ids) that specify layer Id values of the layers to which the scalable-nested SEI messages apply except a layer Id value of the current SEI NAL unit. A set of bitstream conformance tests are performed on the layers based on the scalable-nested SEI messages. The bitstream is stored for communication toward a decoder.

    Picture timing and decoding unit information for temporal scalability
    174.
    发明授权
    Picture timing and decoding unit information for temporal scalability 有权

    公开(公告)号：US12231661B2

    公开(公告)日：2025-02-18

    申请号：US17702117

    申请日：2022-03-23

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Ye-Kui Wang

    IPC: H04N19/31 ,  H04N19/70

    Abstract: A method of decoding is provided. The method includes receiving a bitstream comprising a coded picture and a supplemental enhancement information (SEI) message, wherein the SEI message includes coded picture buffer (CPB) parameters corresponding to decoding unit (DU)-based hypothetical reference decoder (HRD) operations on sublayers; and decoding the coded picture from the bitstream to obtain a decoded picture. A corresponding method of encoding is also provided.

    Temporal identifier constraints for SEI messages
    176.
    发明授权
    Temporal identifier constraints for SEI messages 有权

    公开(公告)号：US12192502B2

    公开(公告)日：2025-01-07

    申请号：US17701368

    申请日：2022-03-22

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Ye-Kui Wang

    IPC: H04N19/46 ,  H04N19/102 ,  H04N19/105 ,  H04N19/132 ,  H04N19/169 ,  H04N19/172 ,  H04N19/174 ,  H04N19/30 ,  H04N19/70

    Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a coded picture in one or more video coding layer (VCL) network abstraction layer (NAL) units in a bitstream. A non-VCL NAL unit is encoded into the bitstream such that a temporal identifier (TemporalId) for the non-VCL NAL unit is constrained to be equal to a TemporalId of an access unit (AU) containing the non-VCL NAL unit when a NAL unit type (nal_unit_type) of the non-VCL NAL indicates a supplemental enhancement information (SEI) message. A set of bitstream conformance tests is performed on the bitstream based on the SEI message. The bitstream is stored for communication toward a decoder.

    Video-based point cloud compression (V-PCC) component synchronization
    177.
    发明授权
    Video-based point cloud compression (V-PCC) component synchronization 有权

    公开(公告)号：US12192498B2

    公开(公告)日：2025-01-07

    申请号：US17714635

    申请日：2022-04-06

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Vladyslav Zakharchenko ,  Jianle Chen ,  Ye-Kui Wang ,  Jeffrey Moguillansky

    IPC: H04N19/44 ,  H04N19/146 ,  H04N19/184 ,  H04N19/597

    Abstract: A method is implemented by a PCC decoder and comprises: receiving, by the PCC decoder, a point cloud bitstream; performing, by the PCC decoder, buffering of the point cloud bitstream based on a time, the performing comprising determining the time based on a delay and a delay offset; and decoding, by the PCC decoder, the point cloud bitstream based on the buffering. A method is implemented by a PCC decoder and comprises: receiving, by the PCC decoder, a point cloud bitstream; performing, by the PCC decoder, buffering of the point cloud bitstream based on a delay, the delay is based on a first delay and a second delay; and decoding, by the PCC decoder, the point cloud bitstream based on the buffering.

    Pictures with mixed NAL unit types
    178.
    发明授权
    Pictures with mixed NAL unit types 有权

    公开(公告)号：US12192490B2

    公开(公告)日：2025-01-07

    申请号：US17471066

    申请日：2021-09-09

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Ye-Kui Wang ,  Fnu Hendry

    IPC: H04N19/169 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196 ,  H04N19/433 ,  H04N19/44 ,  H04N19/70

    Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a plurality of sub-pictures associated with a picture and a flag. The sub-pictures are contained in a plurality of video coding layer (VCL) network abstraction layer (NAL) units. A NAL unit type value is the same for all VCL NAL units associated with the picture when the flag is set to a first value. When the flag is set to a second value, a first NAL unit type value for VCL NAL units containing one or more of the sub-pictures of the picture is different than a second NAL unit type value for VCL NAL units containing one or more of the sub-pictures of the picture. The sub-pictures are decoded based on the NAL unit type values. The sub-pictures are forwarded for display as part of a decoded video sequence.

    Signaling a sign value and an absolute value for a delta picture order count
    179.
    发明授权
    Signaling a sign value and an absolute value for a delta picture order count 有权

    公开(公告)号：US12184892B2

    公开(公告)日：2024-12-31

    申请号：US17196126

    申请日：2021-03-09

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： F N U Hendry ,  Ye-Kui Wang

    IPC: H04N19/58 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

    Abstract: A method of decoding a coded video bitstream implemented by a video decoder. The coded video bitstream includes a plurality of reference picture list structures each containing a plurality of reference picture entries. The method includes parsing a flag that specifies a sign value of an absolute value of a delta picture order count (POC) associated with a short-term reference picture entry from the plurality of reference picture entries; parsing the absolute value of the delta POC associated with the short-term reference picture entry; generating a reference picture list based on the sign value of the absolute value of the delta POC and the absolute value of the delta POC; and performing inter-prediction based on the reference picture list to generate a reconstructed block.

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