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).

  • External decoding refresh (EDR) in video coding
    Patent number: 11943431
    Abstract: A method of decoding a coded video bitstream is provided. The method includes receiving a bitstream containing an external decoder refresh (EDR) picture and a list of pictures for the EDR picture. The list of pictures lists pictures referred to by entries in a first reference picture list, pictures referred to by entries in a second reference picture list, and external pictures in increasing decoding order. A difference between picture order count values for any two consecutive pictures in the list of pictures is greater than one half of a negative of maximum picture order count least significant bits and less than one half of the maximum picture order count least significant bits. The method further includes obtaining an external picture from the the external pictures referred to in the list of pictures and decoding the EDR picture using the external picture that was obtained.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: March 26, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ye-Kui Wang, Fnu Hendry, Jianle Chen
  • Constraints on picture output ordering in a video bitstream
    Patent number: 11943483
    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 equaling one, and wherein the syntax element affects a decoded picture output and a removal process associated with a hypothetical reference decoder (HRD).
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: March 26, 2024
    Assignee: BYTEDANCE INC.
    Inventor: Ye-kui Wang
  • Adaptive colour transform in image/video coding
    Patent number: 11943439
    Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion comprises applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: March 26, 2024
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Weijia Zhu, Jizheng Xu, Li Zhang, Kai Zhang, Ye-Kui Wang, Yue Wang
  • Reference picture management in video coding
    Patent number: 11943428
    Abstract: A method of decoding a coded video bitstream is provided. The method includes parsing a parameter set represented in the coded video bitstream. The parameter set contains a set of syntax elements that include a set of reference picture list structures. The method also includes parsing a slice header of a current slice represented in the coded video bitstream. The slice header contains an index of a reference picture list structure among the set of reference picture list structures in the parameter set. The method further includes deriving, based on the set of syntax elements in the parameter set and the index of the reference picture list structure, a reference picture list of the current slice. The method also includes 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: March 26, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ye-Kui Wang, FNU Hendry
  • Scalable Nesting Of Supplemental Enhancement Information Messages In Video Coding
    Publication number: 20240098292
    Abstract: Several embodiments for video encoding and video decoding are described. An example method of processing video data includes performing a conversion between a video including one or more subpictures and a bitstream of the video, wherein one or more supplemental enhancement information messages that have filler payloads are processed during the conversion according to a format rule, and wherein the format rule disallows the one or more supplemental enhancement information messages having filler payloads to be in a scalable nesting supplemental enhancement information message.
    Type: Application
    Filed: November 27, 2023
    Publication date: March 21, 2024
    Inventor: Ye-kui Wang
  • Signaling Of Subpicture Level And Buffering Information
    Publication number: 20240098282
    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, wherein the bitstream comprises one or more output layer sets comprising one or more video layers according to a rule, wherein the rule specifies a particular decoding order between a subpicture level information (SLI) supplemental enhancement information (SEI) message and a buffering period (BP) SEI message that apply to a particular output layer set, responsive to a condition that the SLI SEI message and the BP SEI message are included in an access unit.
    Type: Application
    Filed: November 22, 2023
    Publication date: March 21, 2024
    Inventor: Ye-kui Wang
  • INTRA RANDOM ACCESS POINTS FOR PICTURE CODING
    Publication number: 20240098252
    Abstract: A video processing method includes performing a conversion between a video having one or more video layers including one or more video pictures and a bitstream of the video according to a format rule. The format rule specifies that a first video picture is an associated intra random access point picture of a second picture and that the second picture are constrained to belong to a same video layer.
    Type: Application
    Filed: November 21, 2023
    Publication date: March 21, 2024
    Inventor: Ye-kui Wang
  • SUBPICTURE SUB-BITSTREAM EXTRACTION PROCESS ENHANCEMENTS
    Publication number: 20240098281
    Abstract: A method of video data processing includes performing a conversion between a video and a bitstream of the video. The bitstream comprises multiple layers comprising one or more subpictures according to a rule which specifies that, during a subpicture sub-bitstream extraction process by which an output bitstream is extracted from the bitstream, a supplemental enhancement information (SEI) network abstraction layer (NAL) unit that includes a scalable nested SEI message that is not applicable to the output bitstream is omitted in the output bitstream.
    Type: Application
    Filed: November 21, 2023
    Publication date: March 21, 2024
    Inventor: Ye-kui Wang
  • Coefficients Coding In Transform Skip Mode
    Publication number: 20240098253
    Abstract: Methods and apparatus for video processing are disclosed. The processing may include video encoding, video decoding, or video transcoding. One example method includes performing a conversion between a current block of a video and a bitstream of the video. The bitstream conforms to a rule that specifies that a context index offset is used for including a first sign flag of a first coefficient in the bitstream. The rule specifies that a value of the context index offset is based on whether a first coding mode is applied on the current block in the bitstream.
    Type: Application
    Filed: November 22, 2023
    Publication date: March 21, 2024
    Inventors: Ye-kui Wang, Weijia Zhu, Li Zhang, Zhipin Deng
  • DATA PROTECTION METHOD AND SYSTEM, MEDIUM, AND ELECTRONIC DEVICE
    Publication number: 20240095408
    Abstract: Embodiments of this application disclose a data protection method and system, a medium, and an electronic device, and belong to the field of communication technologies. In embodiments of this application, a first electronic device establishes a communication connection to a second electronic device. The first electronic device is a trusted device of the second electronic device. When detecting a first trigger condition, the first electronic device sends first data to the second electronic device. The first data is used to trigger the second electronic device to enter a maintenance mode. According to embodiments of this application, the first electronic device triggers the second electronic device to enter the maintenance mode, to protect data of the electronic devices.
    Type: Application
    Filed: December 31, 2021
    Publication date: March 21, 2024
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Huayuan Han, Bing Ma, Jie Li, Kui Wang, Xuan Zhou, Lei Chen, Qiang Li
  • Use Of Header Syntax Elements And Adaptation Parameter Set
    Publication number: 20240098308
    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 constraints on values of one or more first syntax elements in an adaptation parameter set are defined based on semantics of second syntax elements in a picture header and/or a slice header when a picture or a slice referring to the adaptation parameter set.
    Type: Application
    Filed: November 21, 2023
    Publication date: March 21, 2024
    Inventors: Zhipin Deng, Li Zhang, Ye-kui Wang, Kai Zhang, Jizheng Xu
  • Signaling Of Gradual Decoding Refresh And Reference Picture Lists
    Publication number: 20240098273
    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 current picture of a video and a bitstream of the video according to a rule. The rule specifies that responsive to a picture being referred to by an inter-layer reference picture (ILRP) entry in a reference picture list of a slice of the current picture, the picture is allowed to have a gradual decoding refresh (GDR) type and a syntax element specifying a recovery point of the picture in an output order is 0.
    Type: Application
    Filed: November 22, 2023
    Publication date: March 21, 2024
    Inventors: Ye-kui Wang, Li Zhang
  • Sub-picture based random access
    Patent number: 11936882
    Abstract: A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes receiving, by a receiver of the video decoder, a mixed intra random access point (IRAP) picture including a first sub-picture and a second sub-picture, wherein the first sub-picture is an IRAP picture and the second sub-picture is a non-IRAP sub-picture; receiving, by the receiver; a reference picture list (RPL) for the mixed IRAP picture; decoding, by a processor of the video decoder, the second sub-picture using the RPL; and generating, by the processor, an image based on the second sub-picture as decoded. A corresponding encoding method is also provided.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: March 19, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: FNU Hendry, Ye-Kui Wang
  • Low frequency non-separable transform signaling in video coding
    Patent number: 11936865
    Abstract: Several techniques for video encoding and video decoding are described. A method for video processing includes performing a conversion between a video block of a video and a bitstream of the video, wherein the video block uses a low frequency non-separable transform for the conversion, wherein the bitstream conforms to a format rule that specifies that a syntax element is included at a syntax level for the bitstream, wherein 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, and wherein the syntax level is a sequence level, a picture level, or a slice level.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: March 19, 2024
    Assignee: BYTEDANCE INC.
    Inventors: Ye-kui Wang, Kai Zhang, Li Zhang
  • Processing of filler data units in video streams
    Patent number: 11936917
    Abstract: A method of video processing includes performing a conversion between a video and a bitstream of the video according to a rule, wherein the rule specifies that a sub-bitstream extraction process is implemented to generate a sub-bitstream for decoding, wherein the sub-bitstream extraction process is configured to extract, from the bitstream, a sub-bitstream with a target highest temporal identifier, and wherein, 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: Grant
    Filed: July 8, 2022
    Date of Patent: March 19, 2024
    Assignee: BYTEDANCE INC.
    Inventors: Ye-kui Wang, Li Zhang, Kai Zhang
  • INDICATION OF END OF SEQUENCE IN CODED VIDEO
    Publication number: 20240089484
    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 conforms to a format rule. The bitstream includes one or more layers including one or more picture units (PUs). The format rule specifies that, responsive to a first PU in a layer of the bitstream following an end of sequence network abstraction layer (EOS NAL) unit in the layer in a decoding order, a variable of the first PU is set to a particular value, wherein the variable indicates whether the first PU is a coded layer video sequence start (CLVSS) PU.
    Type: Application
    Filed: November 22, 2023
    Publication date: March 14, 2024
    Inventor: Ye-Kui WANG
  • Signaling Of Slice Types In Video Pictures Headers
    Publication number: 20240089483
    Abstract: Devices, systems and methods related to digital video coding, and specifically, to signaling of slice types in video picture headers are described. One example method of video processing includes performing a conversion between a video including one or more video pictures including one or more slices and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that for a video picture of the one or more video pictures having all slices coded as I slices, P slice and B slice related syntax elements are omitted from a picture header for the video picture.
    Type: Application
    Filed: November 14, 2023
    Publication date: March 14, 2024
    Inventors: Kai Zhang, Li Zhang, Hongbin Liu, Zhipin Deng, Jizheng Xu, Ye-kui Wang
  • VIDEO CODING USING PARAMETER SETS
    Publication number: 20240089503
    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 comprising one or more pictures and a bitstream of the video according to a format rule, and wherein the format rule specifies that, in response to satisfying one or more conditions, a syntax element indicating whether a first syntax structure providing a profile, a tier and a level information and a second syntax structure providing decoded picture buffer information are present in a sequence parameter set is set to be equal to 1 to indicate that the first syntax structure and the second syntax structure are present in the sequence parameter set.
    Type: Application
    Filed: November 7, 2023
    Publication date: March 14, 2024
    Inventors: Ye-kui Wang, Li Zhang, Kai Zhang
  • Scaling Window In Video Coding
    Publication number: 20240089508
    Abstract: Video processing, including video coding, video decoding and video transcoding, is described. One example method includes performing a conversion between a video comprising a video picture and a bitstream of a video according to a rule, where the rule specifies that syntax elements indicate a first width and a first height of a scaling window for the video picture, and where the rule specifies that a range of permissible values for the syntax elements include values greater than or equal to two times a second width of the video picture and two times a second height of the video picture.
    Type: Application
    Filed: November 20, 2023
    Publication date: March 14, 2024
    Inventors: Ye-kui Wang, Zhipin Deng, Kai Zhang, Li Zhang
  • Transform Skip Residual Coding
    Publication number: 20240089504
    Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a block of a video and a bitstream of the video according to a rule. The rule specifies that whether a syntax flag indicating whether transform skip residual coding is enabled at a video unit level is present in the bitstream is based on values of a first syntax element indicating usage of sign data hiding in the video unit and a second syntax element indicating usage of dependent quantization in the video unit.
    Type: Application
    Filed: November 8, 2023
    Publication date: March 14, 2024
    Inventors: Ye-Kui Wang, Li Zhang, Kai Zhang, Zhipin Deng