公开(公告)号：US20210203965A1

公开(公告)日：2021-07-01

申请号：US17063891

申请日：2020-10-06

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU ,  Stephan WENGER

IPC: H04N19/30 ,  H04N19/105 ,  H04N19/169

Abstract: A method of extracting a sub-bitstream from an encoded video bitstream using at least one processor includes: obtaining an encoded video bitsream, the encoded video bitstream including a plurality of Network Abstraction Layer (NAL) units; obtaining an output layer set list; comparing the NAL units with the output layer set list; and removing NAL units that are not included in the output layer set list.

公开(公告)号：US20210203942A1

公开(公告)日：2021-07-01

申请号：US17077035

申请日：2020-10-22

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/136 ,  H04N19/174 ,  H04N19/91 ,  H04N19/46 ,  H04N19/70

Abstract: Methods and systems are provided for decoding at least one video stream. A method includes receiving a first network abstraction layer (NAL) unit of a first slice of a coded picture and a second VCL NAL unit of a second slice of the coded picture, the first VCL NAL unit having a first VCL NAL unit type and the second VCL NAL unit having a second VCL NAL unit type that is different from the first VCL NAL unit type, and decoding the coded picture, the decoding including determining a picture type of the coded picture based on the first VCL NAL unit type of the first VCL NAL unit and the second VCL NAL unit type of the second VCL NAL unit, or based on an indicator, received by the at least one processor, indicating that the coded picture includes mixed VCL NAL unit types.

公开(公告)号：US20210203939A1

公开(公告)日：2021-07-01

申请号：US17063253

申请日：2020-10-05

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/132 ,  H04N19/189 ,  H04N19/146 ,  H04N19/172

Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform acquiring an input bitstream comprising metadata and video data, decoding the video data, determining whether the metadata comprises at least one flag signaling at least one component of a picture size of at least one picture of the video data, and signaling, in a case where it is determined that the metadata comprises the at least one flag, a display device to display the at least one picture from the video data according to the at least one flag.

公开(公告)号：US20210092391A1

公开(公告)日：2021-03-25

申请号：US17022727

申请日：2020-09-16

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/132 ,  H04N19/196 ,  H04N19/146 ,  H04N19/184 ,  H04N19/172

Abstract: A method, device, and computer-readable medium for decoding an encoded video bitstream using at least one processor, including obtaining a flag indicating that a conformance window is not used for reference picture resampling; based on the flag indicating that the conformance window is not used for the reference picture resampling, determining whether a resampling picture size is signaled; based on determining that the resampling picture size is signaled, determining a resampling ratio based on the resampling picture size; based on determining that the resampling picture size is not signaled, determining the resampling ratio based on an output picture size; and performing the reference picture resampling on a current picture using the resampling ratio.

公开(公告)号：US20210067789A1

公开(公告)日：2021-03-04

申请号：US16999445

申请日：2020-08-21

Applicant: TENCENT AMERICA LLC

Inventor： Liang ZHAO ,  Xin ZHAO ,  Xiang LI ,  Byeongdoo CHOI ,  Shan LIU

IPC: H04N19/30 ,  H04N19/186 ,  H04N19/132 ,  H04N19/136

Abstract: A method, computer program, and computer system is provided for coding a video sequence. Video data comprising one or more luma samples is received. A YUV format associated with the received video data is determined. A height setting value and a width setting value corresponding to the one or more luma samples are restricted based on the determined YUV format. The YUV format may include a YUV4:4:4 format, a YUV4:2:2 format, a YUV4:2:0 format, and a YUV4:0:0 format.

公开(公告)号：US20200296394A1

公开(公告)日：2020-09-17

申请号：US16814350

申请日：2020-03-10

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/30 ,  H04N19/172

Abstract: Systems and methods for decoding a video stream, a method includes receiving video stream, the video stream including: a frame of a plurality of two-dimensional (2D) pictures that are layers of the frame, each of the plurality of 2D pictures having a respective attribute of a same three-dimensional (3D) representation, frame partition information that indicates the frame is partitioned into a plurality of sub-frames, each of the plurality of sub-frames being a respective combination of a sub-region of each picture of the plurality of 2D pictures, and 3D bounding box information that specifies a 3D position corresponding to a sub-frame of the plurality of sub-frames; the method further includes identifying the sub-frame using the frame partition information; and decoding the sub-frame identified.

公开(公告)号：US20200296368A1

公开(公告)日：2020-09-17

申请号：US16815947

申请日：2020-03-11

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan Wenger ,  Shan Liu

IPC: H04N19/119 ,  H04N19/117 ,  H04N19/184

Abstract: Systems and methods for decoding are provided, a method is performed by at least one processor to decode a sub-bitstream of a coded video stream, the coded video stream including a coded version of a first sub-picture and a second sub-picture of a picture, the method including decoding the first sub-picture of the picture, independently from the second sub-picture, using sub-picture and tile partitioning, wherein (i) the first sub-picture comprises a first rectangular region of the picture and the second sub-picture comprises a second rectangular region of the picture, the second rectangular region being different from the first rectangular region, (ii) the first sub-picture and the second sub-picture each include at least one tile, and (iii) the first sub-picture and the second sub-picture do not share a common tile.

公开(公告)号：US20200236377A1

公开(公告)日：2020-07-23

申请号：US16745824

申请日：2020-01-17

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Shan LIU

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/46 ,  H04N19/70 ,  H04N19/129 ,  H04N19/176

Abstract: Methods and systems for decoding a video stream are provided, a method comprises receiving a coded video stream comprising a picture partitioned into a plurality of tile groups, each of the plurality of tile groups include at least one tile, the coded video stream further comprising a first indicator that indicates whether a tile group of the plurality of tile groups has a rectangular shape; identifying whether the tile group of the picture has the rectangular shape based on the first indicator; and reconstructing, forwarding, or discarding the tile group.

公开(公告)号：US20250039389A1

公开(公告)日：2025-01-30

申请号：US18913261

申请日：2024-10-11

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/139 ,  H04N19/196

Abstract: A method, device, and non-transitory computer-readable medium for decoding an encoded video bitstream using at least one processor, including obtaining a coded picture from the encoded video bitstream; decoding the coded picture to generate a decoded picture; obtaining a first flag indicating whether reference picture resampling is enabled; obtaining a second flag indicating whether reference pictures have a constant reference picture size; obtaining a third flag indicating whether output pictures have a constant output picture size indicated in the encoded video bitstream; generating a reference picture by resampling the decoded picture to have the constant reference picture size, and storing the reference picture in a decoded picture buffer; and generating an output picture by resampling the decoded picture to have the constant output picture size, and outputting the output picture.

公开(公告)号：US20240259579A1

公开(公告)日：2024-08-01

申请号：US18629567

申请日：2024-04-08

Applicant: Tencent America LLC

Inventor： Byeongdoo CHOI ,  Stephan WENGER ,  Shan LIU

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

CPC classification number: H04N19/44 ,  H04N19/187 ,  H04N19/46 ,  H04N19/70

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.