公开(公告)号：US20220210404A1

公开(公告)日：2022-06-30

申请号：US17696186

申请日：2022-03-16

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/105 ,  H04N19/30 ,  H04N19/172 ,  H04N19/46 ,  H04N19/187 ,  H04N19/70

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform parsing at least one video parameter set comprising at least one syntax element indicating whether at least one layer in the scalable bitstream is one of a dependent layer of the scalable bitstream and an independent layer of the scalable bitstream, coding a picture in the dependent layer by parsing and interpreting an inter-layer reference picture list, and coding a picture in an independent layer without parsing and interpreting the inter-layer reference picture list.

公开(公告)号：US20220174323A1

公开(公告)日：2022-06-02

申请号：US17672201

申请日：2022-02-15

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/70 ,  H04N19/167 ,  H04N19/172

Abstract: A method includes receiving video data including one or more subpicture. The video data includes a flag, signaled in a sequence parameter set, indicating whether to use a network abstraction unit (NAL) layer identifier as a subpicture identifier, where the subpicture identifier is signaled in a NAL unit header based on the flag indicating to use the NAL layer identifier, and the subpicture identifier is signaled in a slice header based on the flag indicating not to use the NAL layer identifier. The video data is decoded based on the subpicture identifier.

公开(公告)号：US20220159305A1

公开(公告)日：2022-05-19

申请号：US17591975

申请日：2022-02-03

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/70 ,  H04N19/184 ,  H04N19/136 ,  H04N19/51 ,  H04N19/103 ,  H04N19/172 ,  H04N19/593

Abstract: Systems and methods for coding and decoding are provided. A method includes encoding a video stream including video data partitioned into a plurality of layers, wherein the encoding includes determining whether a first picture of the video stream is to be output based on a syntax element that indicates a mode of output layer set signaling.

公开(公告)号：US20220141479A1

公开(公告)日：2022-05-05

申请号：US17578977

申请日：2022-01-19

Applicant: Tencent America LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/44 ,  H04N19/187 ,  H04N19/70 ,  H04N19/46

Abstract: A method of decoding an encoded video bitstream using at least one processor includes obtaining a coded video sequence including a plurality of output layer sets from the encoded video bitstream; obtaining a first flag indicating whether each output layer set of the plurality of output layer sets includes more than one layer; based on the first flag indicating that the each output layer set includes more than the one layer, obtaining a first syntax element indicating an output layer set mode; selecting at least one layer from among layers included in the plurality of output layer sets as at least one output layer based on at least one of the first flag and the first syntax element; and outputting the at least one output layer.

公开(公告)号：US20210399739A1

公开(公告)日：2021-12-23

申请号：US17324623

申请日：2021-05-19

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Wei WANG ,  Wei JIANG ,  Stephan WENGER ,  Shan LIU

IPC: H03M7/30

Abstract: Systems and methods for encoding and decoding neural network data is provided. A method includes: receiving a neural network representation (NNR) bitstream including a group of NNR units (GON) that represents an independent neural network with a topology, the GON including an NNR model parameter set unit, an NNR layer parameter set unit, an NNR topology unit, an NNR quantization unit, and an NNR compressed data unit; and reconstructing the independent neural network with the topology by decoding the GON.

公开(公告)号：US20210368196A1

公开(公告)日：2021-11-25

申请号：US17320764

申请日：2021-05-14

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172

Abstract: Systems and methods for decoding a coded video stream are provided. A method includes receiving a coded video stream that includes an access unit, including a picture; signaling a first flag, in an access unit delimiter of the coded video stream, that indicates whether the access unit includes either or neither one from among an intra random access point (IRAP) picture and a gradual decoding refresh (GDR) picture; signaling a second flag, in a picture header of the coded video stream, that indicates whether the picture is the IRAP picture; and decoding the picture, as a current picture, based on the signaling of the first flag and the second flag, wherein a value of the first flag and a value of the second flag are aligned.

公开(公告)号：US20210314587A1

公开(公告)日：2021-10-07

申请号：US17220672

申请日：2021-04-01

Applicant: Tencent America LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/44 ,  H04N19/93 ,  H04N19/46 ,  H04N19/70 ,  H04N19/176

Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. An apparatus includes processing circuitry that obtains a gate flag for each of at least one constraint information group in constraint information signaled in a coded video bitstream. Each gate flag indicates whether a constraint information group of the at least one constraint information group corresponding to the respective gate flag is present in the constraint information. The constraint information is for a subset of coding blocks in the coded video bitstream. Whether the constraint information group of the gate flag is present in the constraint information is determined based on the gate flag. The constraint information group includes at least one constraint flag for the subset of coding blocks. Prediction information for the subset of coding blocks is determined based on whether the constraint information group of the gate flag is present in the constraint information.

公开(公告)号：US20210306651A1

公开(公告)日：2021-09-30

申请号：US17095289

申请日：2020-11-11

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/46 ,  H04N19/169 ,  H04N19/174

Abstract: A method, computer program, and computer system is provided for coding video data. Video data including one or more subpictures is received. A network abstraction layer (NAL) unit type associated with each of the one or more subpictures is identified based on checking a flag corresponding to mixed NAL units in the one or more subpictures. The video data is decoded based on the identified NAL unit types.

公开(公告)号：US20210266599A1

公开(公告)日：2021-08-26

申请号：US17026781

申请日：2020-09-21

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan Wenger ,  Shuai Zhao

IPC: H04N19/70 ,  H04N19/142 ,  H04N19/172 ,  H04N19/174 ,  H04N19/42

Abstract: A method and apparatus for identifying an Access Unit (AU) boundary in a coded video bitstream comprising: correlating information from at least one field from each of at least two Network Abstraction Layer (NAL) units.

公开(公告)号：US20210203970A1

公开(公告)日：2021-07-01

申请号：US17063082

申请日：2020-10-05

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/46 ,  H04N19/129 ,  H04N19/159 ,  H04N19/169 ,  H04N19/172

Abstract: A method of generating an encoded video bitstream, including obtaining an IRAP AU from a video bitstream; determining whether the IRAP AU is a first AU in a decoding order, whether each picture is an IDR picture, or whether each picture is a first picture of a layer following an EOS NAL unit; if so, setting a first flag for the IRAP AU equal to one; if not, determining whether a second flag for the IRAP AU is externally set to an external value; if so, setting the first flag for the IRAP AU equal to the external value; and if not, setting the first flag for the IRAP AU and the second flag for the IRAP AU equal to zero; encoding the video bitstream based on the first flag and the second flag; and transmitting the encoded video bitstream.