公开(公告)号：US20220224945A1

公开(公告)日：2022-07-14

申请号：US17702418

申请日：2022-03-23

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/174 ,  H04N19/172

Abstract: A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), where the PU includes a picture header (PH) network abstraction layer (NAL) unit preceding a first video coding layer (VCL) NAL unit, and decoding a coded picture from the PU to obtain a decoded picture.

公开(公告)号：US20220217412A1

公开(公告)日：2022-07-07

申请号：US17702049

申请日：2022-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/70 ,  H04N19/30 ,  H04N19/169

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream at a decoder. The bitstream comprises one or more layers and a scalable nesting supplemental enhancement information (SEI) message in a current SEI network abstraction layer (NAL) unit. The scalable nesting SEI message contains scalable-nested SEI messages and a scalable nesting all layers flag (all_layers_flag) that specifies whether the scalable-nested SEI messages apply to all layers that have a layer identifier (Id) that is greater than or equal to a layer Id of the current SEI NAL unit. A coded picture is decoded from the one or more layers to produce a decoded picture. The decoded picture is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20220217410A1

公开(公告)日：2022-07-07

申请号：US17701359

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/70 ,  H04N19/169 ,  H04N19/174 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a picture parameter set (PPS) in a PPS network abstraction layer (NAL) unit and a coded picture comprising a set of video coding layer (VCL) NAL units. A particular VCL NAL unit does not refer to the PPS NAL unit unless a value of a NAL unit header layer identifier (nuh_layer_id) of the PPS NAL unit is less than or equal to a value of a nuh_layer_id of the particular VCL NAL unit. The coded picture is decoded from the set of VCL NAL units based on the PPS in the PPS NAL unit to produce a decoded picture. The decoded picture is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20220217395A1

公开(公告)日：2022-07-07

申请号：US17703401

申请日：2022-03-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

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

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising a video parameter set (VPS) and one or more sublayers. A buffering period (BP) supplemental enhancement information (SEI) message comprising a BP maximum sublayers minus one (bp_max_sublayers_minus1) is also encoded into the bitstream. The bp_max_sublayers_minus1 is set to a value in a range of zero to a maximum number of sublayers indicated in the VPS. A hypothetical reference decoder (HRD) is initialized based on the BP SEI message. A set of bitstream conformance tests are performed on the sublayers. The bitstream is stored for communication toward a decoder.

公开(公告)号：US20220217388A1

公开(公告)日：2022-07-07

申请号：US17701382

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/105 ,  H04N19/174 ,  H04N19/172

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a plurality of pictures. A no output of prior pictures flag (NoOutputOfPriorPicsFlag) is set when a value of maximum picture width in luma samples (PicWidthMaxInSamplesY) for a current access unit (AU) is different from a value of PicWidthMaxInSamplesY for a preceding AU in decoding order. A decoded picture buffer (DPB) is emptied without output of contained pictures based on a value of the NoOutputOfPriorPicsFlag. A current picture is decoded and stored in the DPB. The current picture is output from the DPB for display as part of a decoded video sequence.

公开(公告)号：US20220217386A1

公开(公告)日：2022-07-07

申请号：US17700834

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/14 ,  H04N19/184 ,  H04N19/172

Abstract: A method of decoding implemented by a video decoder is provided. The method includes receiving a bitstream including a sequence parameter set (SPS) containing a first flag and an indicator of a length of a picture order count (POC) most significant bits (MSB) value when present in a header referring to the SPS, where a value of the first flag specifies that a second flag is present in the header referring to the SPS, and where a value of the second flag specifies that the POC MSB value is present in the header; determining a POC value based on the POC MSB value; identifying a picture from the bitstream based on the POC value; and decoding the picture to obtain a decoded picture.

公开(公告)号：US20220217384A1

公开(公告)日：2022-07-07

申请号：US17700722

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/169 ,  H04N19/172

Abstract: A method of decoding is provided. The method includes receiving, by the video decoder, a video bitstream including a video parameter set (VPS) and a plurality of layers, where no layer is neither an output layer of at least one OLS nor a direct reference layer of any other layer; and decoding, by the video decoder, a picture from one of the plurality of layers. A method of encoding is also provided. The method includes generating, by the video encoder, a plurality of layers and a VPS specifying one or more output layer sets (OLSs), where no layer is neither an output layer of at least one OLS nor a direct reference layer of any other layer; encoding, by the video encoder, the plurality of layers and the VPS into a video bitstream; and storing, by the video encoder, the video bitstream for communication toward a video decoder.

公开(公告)号：US20220217383A1

公开(公告)日：2022-07-07

申请号：US17700706

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/174 ,  H04N19/172

Abstract: A method of video decoding comprises receiving a bitstream including a picture parameter set (PPS) containing a single slice per subpicture flag; determining whether the single slice per subpicture flag has a first value or a second value, where the first value specifies that each subpicture referring to the PPS includes one and only one rectangular slice, and where the second value specifies that each subpicture referring to the PPS may include one or more rectangular slices; decoding the one and only one rectangular slice when the single slice per subpicture flag has the first value and the one or more rectangular slices when the single slice per subpicture flag has the second value.

公开(公告)号：US20220217380A1

公开(公告)日：2022-07-07

申请号：US17701011

申请日：2022-03-22

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/44 ,  H04N19/46 ,  H04N19/70 ,  H04N19/172

Abstract: A method comprises: receiving, by a video decoder, a video bitstream comprising an RPL flag, wherein the RPL flag equal to a first value specifies that RPL signaling is present in a PH, and wherein the RPL flag equal to a second value specifies that RPL signaling is not present in the PH and may be present in slice headers; and decoding, by the video decoder using the RPL flag, a coded picture to obtain a decoded picture. A comprises: receiving, by a video decoder, a video bitstream comprising an SAO flag, wherein the SAO flag specifies that SAO information may be present or is not present in a PH or specifies that the SAO information may be present or is not present in slice headers; and decoding, by the video decoder using the SAO flag, a coded picture to obtain a decoded picture.

公开(公告)号：US20220217376A1

公开(公告)日：2022-07-07

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.