Patents by Inventor Kui Wang

Kui Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • PRESENCE OF ADAPTATION PARAMETER SET UNITS
    Publication number: 20240129538
    Abstract: Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example method of video processing includes performing a conversion between a video comprising one or more pictures comprising one or more slices and a bitstream of the video. The bitstream conforms to a predefined order between a position of a first network abstraction layer (NAL) unit in a picture unit carrying an adaptation parameter set information and a second NAL unit that is a last video coding layer (VCL) NAL unit in the picture unit.
    Type: Application
    Filed: November 15, 2023
    Publication date: April 18, 2024
    Inventors: Zhipin Deng, Li Zhang, Ye-kui Wang, Kai Zhang
  • ENHANCED SIGNALING OF EXTENDED DEPENDENT RANDOM-ACCESS POINT SUPPLEMENTAL ENHANCEMENT INFORMATION
    Publication number: 20240129536
    Abstract: A mechanism for processing video data is disclosed. A value of an extended dependent random-access point (EDRAP) leading pictures decodable flag (edrap_leading_pictures_decodable_flag) syntax element is determined. A conversion can then be performed between a visual media data and a bitstream based on the edrap_leading_pictures_decodable_flag syntax element. The value of the edrap_leading_pictures_decodable_flag indicates whether ordering constraints are imposed on the EDRAP picture.
    Type: Application
    Filed: December 27, 2023
    Publication date: April 18, 2024
    Inventors: Ye-Kui Wang, Yang Wang, Li Zhang
  • Tile Group Assignment For Raster Scan And Rectangular Tile Groups In Video Coding
    Publication number: 20240129494
    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. The mechanism determines whether the tile group is a raster scan tile group or a rectangular tile group. The number of tiles in the tile group is determined based on whether the tile group is the raster scan tile group or the rectangular tile group. The tiles are encoded into a bitstream based on the tile group. The bitstream is stored for communication toward a decoder.
    Type: Application
    Filed: December 28, 2023
    Publication date: April 18, 2024
    Inventors: FNU Hendry, Ye-Kui Wang
  • WAVEFRONT PARALLEL PROCESSING FOR TILE, BRICK, AND SLICE
    Publication number: 20240129504
    Abstract: A method of decoding includes encountering an end of tile bit with a first value and byte alignment bits in a video bitstream, which indicate that a current coding tree block (CTB) is a last CTB in a tile; encountering an end of CTB row bit with the first value and the byte alignment bits in the video bitstream, which indicate that waveform parallel processing (WPP) is enabled and that the current CTB is the last CTB in a CTB row but not the last CTB in the tile; and reconstructing the plurality of CTBs in the tile based on the end of tile bit with the first value, the end of CTB row bit with the first value, and the byte alignment bits.
    Type: Application
    Filed: December 18, 2023
    Publication date: April 18, 2024
    Inventors: FNU Hendry, Ye-Kui Wang
  • DECODED PICTURE BUFFER MEMORY ALLOCATION AND PICTURE OUTPUT IN SCALABLE VIDEO CODING
    Publication number: 20240129544
    Abstract: Methods and apparatus for video processing, including coding and decoding, are described. One example video processing method includes performing a conversion between a video having one or more video layers and a bitstream of the video according to a format rule, and wherein the format rule specifies that a value of a flag that indicates whether to remove pictures previously decoded and stored in a decoded picture buffer from the decoded picture buffer when decoding an access unit of a certain type is included in the bitstream.
    Type: Application
    Filed: December 6, 2023
    Publication date: April 18, 2024
    Inventor: Ye-kui Wang
  • Signalling Of General Constraints Flag
    Publication number: 20240129540
    Abstract: Methods, systems, apparatus for video processing are described. The processing may include encoding, decoding or transcoding. One example video processing method includes performing a conversion between a video and a bitstream of the video according to a rule. The rule specifies that a syntax element is included in a profile, tier, level information syntax structure to indicate whether one or more general constraint information syntax elements are included in a general constraint information syntax structure and/or whether the general constraint information syntax structure is included in the profile, tier, level information syntax structure.
    Type: Application
    Filed: November 22, 2023
    Publication date: April 18, 2024
    Inventors: Zhipin Deng, Ye-kui Wang, Li Zhang, Kai Zhang
  • Using Subpictures And Tiles In Video Coding
    Publication number: 20240129541
    Abstract: Embodiments for video encoding and video decoding are described. One example method includes performing a conversion between a video and a bitstream of the video according to a rule, wherein the rule specifies that only one of two conditions is true when a number of subpictures minus 1 indicated by a first syntax element in a sequence parameter set is greater than zero and when a current subpicture with a subpicture index subpicIdx of a first video picture of the video has a second syntax element in the sequence parameter set indicates that a subpicture with the subpicture index subpicIdx of each video picture of the video in a coded layer video sequence is treated as a video picture in a decoding process that excludes an in-loop filtering operation.
    Type: Application
    Filed: November 30, 2023
    Publication date: April 18, 2024
    Inventors: Ye-kui Wang, Li Zhang, Jizheng Xu, Kai Zhang
  • CODING OF INSTANTANEOUS DECODING REFRESH SUBPICTURES
    Publication number: 20240127464
    Abstract: Methods and apparatus for video processing are described. The processing may include video encoding, video decoding, or video transcoding. An example video processing method includes performing a conversion between a video including one or more pictures including one or more subpictures and a bitstream of the video. The one or more pictures and/or the one or more subpictures are included into the bitstream according to an order rule. The order rule specifies a relationship between a position of a current instantaneous decoder refresh (IDR) picture or a current IDR subpicture in the bitstream with respect to another picture referred to by an entry in a reference picture list for a current slice of the current IDR picture or the current IDR subpicture.
    Type: Application
    Filed: December 4, 2023
    Publication date: April 18, 2024
    Inventors: Ye-Kui WANG, Li Zhang, Kai Zhang
  • Constraints On Reference Picture Lists For Subpictures
    Publication number: 20240129542
    Abstract: Methods and apparatus for processing of video are described. The processing may include video encoding, decoding or transcoding. One example video processing method includes performing a conversion between a video including a current picture including a current subpicture including a current slice and a bitstream of the video. The bitstream conforms to a format rule that disallows an active entry in a reference picture list of the current slice from including a first picture that precedes in a decoding order a second picture that includes a step-wise temporal sublayer access subpicture in response to conditions associated with at least the first picture and the current subpicture.
    Type: Application
    Filed: December 4, 2023
    Publication date: April 18, 2024
    Inventor: Ye-kui Wang
  • Processing of Filler Data Units in Video Streams
    Publication number: 20240129545
    Abstract: A method of video processing includes performing a conversion between a video and a bitstream of the video according to a rule. The rule specifies that a sub-bitstream extraction process is implemented to generate a sub-bitstream for decoding. The sub-bitstream extraction process is configured to extract, from the bitstream, a sub-bitstream with a target highest temporal identifier. The rule specifies that, during the extracting, upon removing a video coding layer (VCL) network abstraction layer (NAL) unit, filler data units and filler supplemental enhancement information (SEI) messages in SEI NAL units that are associated with the VCL NAL unit are also removed.
    Type: Application
    Filed: December 1, 2023
    Publication date: April 18, 2024
    Inventors: Ye-kui Wang, Li Zhang, Kai Zhang
  • Scalable nested SEI message handling in video sub-bitstream extraction process
    Patent number: 11962790
    Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video including one or more layers and a bitstream of the video according to a rule, wherein the rule specifies, in a process of sub-bitstream extraction to output an output sub-bitstream, whether to generate non-scalable nested supplementary enhancement information (SEI) messages by extracting scalable-nested SEI messages from a scalable nesting SEI message based on a first flag indicating whether the SEI message applies to specific output layer sets (OLSs) and a second flag indicating whether the SEI message applies to all subpictures or only to specific subpictures.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: April 16, 2024
    Assignee: BYTEDANCE INC.
    Inventor: Ye-kui Wang
  • Video usability information in common media application format
    Patent number: 11962808
    Abstract: A mechanism for processing video data is disclosed. Information in a sequence parameter set (SPS) in a Versatile Video Coding (VVC) Common Media Application Format (CMAF) track is determined. A rule specifies a value of a video usability information progressive source flag (vui_progressive_source_flag) field in the SPS shall be equal to one. A conversion is performed between a visual media data and a media data file based on the SPS.
    Type: Grant
    Filed: April 12, 2022
    Date of Patent: April 16, 2024
    Inventor: Ye-kui Wang
  • Indication of tiles in a video picture
    Patent number: 11962814
    Abstract: A method includes performing a conversion between a video including a video picture including one or more tiles and a bitstream of the video. The video picture refers to a picture parameter set, and the picture parameter set conforms to a format rule specifying that the picture parameter set includes a list of column widths for N tile columns, where N is an integer. An (N?1)-th tile column exists in the video picture and the (N?1)-th tile column has a width that is equal to an (N?1)-th entry in a list of explicitly included tile column widths plus one number of coding tree blocks.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: April 16, 2024
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Kai Zhang, Li Zhang, Ye-kui Wang, Zhipin Deng, Kui Fan, Jizheng Xu, Hongbin Liu
  • Syntax for dependent random access point indication in video bitstreams
    Patent number: 11962936
    Abstract: Systems, methods and apparatus for encoding, decoding or transcoding visual media data are described. One example method of processing visual media data includes performing a conversion between visual media data and a bitstream of the visual media data according to a format rule, wherein the format rule specifies that a supplemental enhancement information (SEI) message that refers to a dependent random access point (DRAP) picture is included in the bitstream, and wherein the format rule further specifies that the SEI message includes a syntax element indicating a number of intra random access point (IRAP) pictures or dependent random access point (DRAP) pictures that are within a same coded layer video sequence (CLVS) as the DRAP picture.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: April 16, 2024
    Assignee: Lemon Inc.
    Inventor: Ye-Kui Wang
  • Constraints On Picture Output Ordering In A Video Bitstream
    Publication number: 20240121441
    Abstract: Methods, systems and devices for picture output ordering constraints in video bitstreams are described. An example method of video processing includes performing a conversion between a video including one or more pictures and a bitstream of the video according to a rule, wherein the rule specifies that the bitstream includes at least a first picture that is output, wherein the first picture is in an output layer, wherein the first picture includes a syntax element equal to one, and wherein the syntax element affects a decoded picture output and a removal process associated with a hypothetical reference decoder (HRD).
    Type: Application
    Filed: November 30, 2023
    Publication date: April 11, 2024
    Inventor: Ye-kui Wang
  • HANDLING DIFFERENT NAL TYPES IN VIDEO SUB-BITSTREAM EXTRACTION
    Publication number: 20240121417
    Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video and a bitstream of the video. The bitstream includes network abstraction layer (NAL) units for multiple video layers according to a rule. The rule defines a sub-bitstream extraction process by which NAL units are removed from the bitstream to generate an output bitstream, and specifies to remove all supplemental enhancement information (SEI) NAL units that contain a non-scalable-nested SEI message with a particular payload type, responsive to a list of NAL unit header layer identifier values in an output layer set (OLS) with a target OLS index not including all values of NAL unit header layer identifiers in all video coding layer (VCL) NAL units in the bitstream that is input to the sub-bitstream extraction process.
    Type: Application
    Filed: December 4, 2023
    Publication date: April 11, 2024
    Inventor: Ye-kui Wang
  • LOW FREQUENCY NON-SEPARABLE TRANSFORM SIGNALING IN VIDEO CODING
    Publication number: 20240121389
    Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a video block of a video and a bitstream of the video. The video block uses a low frequency non-separable transform for the conversion. The bitstream conforms to a format rule specifying that a syntax element is included at a syntax level for the bitstream. The syntax element is indicative of whether use of a scaling matrix which is derived from a reference scaling list is enabled for the video block. The syntax level is a sequence level, a picture level, or a slice level.
    Type: Application
    Filed: November 13, 2023
    Publication date: April 11, 2024
    Inventors: Ye-kui Wang, Li Zhang, Kai Zhang
  • Constraints On Adaptation Parameter Set Syntax Elements
    Publication number: 20240121388
    Abstract: Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example method of video processing includes performing a conversion between a video and a bitstream of the video according to a format rule. The format rule specifies that a first field at a sequence level or a picture level or a slice level controls a value of a second field in an adaptation parameter set.
    Type: Application
    Filed: November 28, 2023
    Publication date: April 11, 2024
    Inventors: Zhipin Deng, Li Zhang, Ye-Kui Wang, Kai Zhang, Jizheng Xu
  • Reference picture management in video coding
    Patent number: 11956420
    Abstract: A method of decoding a coded video bitstream is provided. The method includes parsing a slice header of a current slice represented in the coded video bitstream. The slice header includes a reference picture list structure. The method also includes deriving, based on the reference picture list structure, a reference picture list of the current slice; and obtaining, based on the reference picture list, at least one reconstructed block of the current slice.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: April 9, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ye-Kui Wang, FNU Hendry
  • Decoded picture buffer management and subpictures in video coding
    Patent number: 11956454
    Abstract: Embodiments for video encoding and video decoding are described. One example method includes performing a conversion between a video and a bitstream of the video, wherein the bitstream includes one or more pictures including one or more subpictures according to a rule, and wherein the rule specifies that, responsive to a condition, a rewriting operation is performed on referenced one or more sequence parameter sets during a subpicture sub-bitstream extraction process by which a target output sub-bitstream is extracted from the bitstream.
    Type: Grant
    Filed: December 19, 2022
    Date of Patent: April 9, 2024
    Assignee: BYTEDANCE INC.
    Inventor: Ye-Kui Wang