公开(公告)号：US20220217374A1

公开(公告)日：2022-07-07

申请号：US17703377

申请日：2022-03-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/30 ,  H04N19/70 ,  H04N19/169 ,  H04N19/423 ,  H04N19/154

Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more layers of coded pictures. A hypothetical reference decoder (HRD) parameters syntax structure is encoded into the bitstream. The HRD parameters syntax structure specifies that all of the layers are associated with a same number of coded picture buffer (CPB) delivery schedules. A set of bitstream conformance tests are performed on the layers based on the CPB delivery schedules. The bitstream is stored for communication toward a decoder

公开(公告)号：US20220210458A1

公开(公告)日：2022-06-30

申请号：US17700017

申请日：2022-03-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

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

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising an output layer set (OLS) and a video parameter set (VPS). The OLS includes one or more layers of coded pictures and the VPS includes an OLS mode identification code (ols_mode_idc) specifying that for each OLS, all layers in the each OLS are output layers. The output layers are determined based on the ols_mode_idc in the VPS. A coded picture from the output layers is decoded to produce a decoded picture. The decoded picture is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20220201284A1

公开(公告)日：2022-06-23

申请号：US17578178

申请日：2022-01-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/70 ,  H04N19/44 ,  H04N19/58 ,  H04N19/46 ,  H04N21/44

Abstract: A method of decoding a coded video bitstream. The method includes obtaining a first reference picture list of a current slice represented in the coded video bitstream and a second reference picture list of the current slice, and marking a status of a reference picture in a decoded picture buffer (DPB) based on the first reference picture list and the second reference picture list when the current slice is a first slice in a current picture to which the current slice belongs. The status of the reference picture in the decoded picture buffer is used for short-term reference, used for long-term reference, or unused for reference. The method also includes using the reference picture in a reconstructing process of the current picture or a picture following the current picture when the status of the reference picture is used for short-term reference or used for long-term reference.

公开(公告)号：US20220159313A1

公开(公告)日：2022-05-19

申请号：US17665263

申请日：2022-02-04

Applicant: Huawei Technologies Co., Ltd.

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

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

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：US20220030253A1

公开(公告)日：2022-01-27

申请号：US17497641

申请日：2021-10-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang

IPC: H04N19/174 ,  H04N19/436

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a slice. A number of entry points (NumEntryPoints) in the slice is derived. Offsets for subsets of coded slice data with subset index values ranging from zero to the NumEntryPoints are determined. The slice is decoded based on the offsets for the subsets of the coded slice data. The slice is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20210409733A1

公开(公告)日：2021-12-30

申请号：US17471066

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

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

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.

公开(公告)号：US20210409702A1

公开(公告)日：2021-12-30

申请号：US17470376

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/159 ,  H04N19/52 ,  H04N19/132 ,  H04N19/186

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a current picture including a sub-picture coded according to inter-prediction. A motion vector for a block of the sub-picture is determined. A clipping function is applied to sample locations in a reference block to support application of an interpolation filter when the motion vector points outside of the sub-picture and when a flag is set to indicate the sub-picture is treated as a picture. The interpolation filter is applied to results of the clipping function to obtain a predicted sample value. The block is decoded based on the predicted sample value. The block is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20210409691A1

公开(公告)日：2021-12-30

申请号：US17470798

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

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

IPC: H04N19/107 ,  H04N19/46 ,  H04N19/172 ,  H04N19/162

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 value for a first flag is provided by an external input; setting a first flag equal to the value provided by the external input and a second flag equal to the value of the first flag to prevent a gradual decoding refresh (GDR) picture from being output when the value for the first flag is provided by the external input; decoding the GDR picture; and storing the GDR picture in a decoded picture buffer (DPB).

公开(公告)号：US20210337198A1

公开(公告)日：2021-10-28

申请号：US17370904

申请日：2021-07-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  FNU Hendry

IPC: H04N19/119 ,  H04N19/70 ,  H04N19/176 ,  H04N19/137 ,  H04N19/593

Abstract: A video coding mechanism is disclosed. The mechanism includes a bitstream comprising a parameter set and one or more sub-pictures partitioned from a picture. The parameter set is parsed to obtain a flag indicating that a current sub-picture is a temporal motion constrained sub-picture. The current sub-picture is extracted from the bitstream independently of the picture and based on the flag. The current sub-picture is decoded to create a video sequence. The video sequence is forwarded for display.

公开(公告)号：US20210314577A1

公开(公告)日：2021-10-07

申请号：US17348719

申请日：2021-06-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang

IPC: H04N19/174 ,  H04N19/117 ,  H04N19/172 ,  H04N19/134

Abstract: A video coding mechanism is disclosed. The mechanism includes partitioning a picture into a plurality of tiles. A number of the tiles are included in a tile group. A flag is also encoded into a parameter set of a bitstream. The flag is set to a first value when the tile group is a raster scan tile group and a second value when the tile group is a rectangular tile group. The tiles are encoded into the bitstream based on the tile group. The bitstream is stored for communication toward a decoder.