Patents by Inventor Kai Zhang

Kai Zhang 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).

  • Signaling of Slice and Tile Picture Partitions
    Publication number: 20230027555
    Abstract: Techniques for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video including a video picture including a video tile including one or more slices and a bitstream of the video according to a rule. The rule specifies that a second slice in a tile that includes a first slice in a picture has a height that is represented in a unit of coding tree units. The first slice has a first slice index, and the second slice has a second slice index that is determined based on the first slice index and a number of explicitly provided slice heights in the video tile. The height of the second slice is determined based on the first slice index and the second slice index.
    Type: Application
    Filed: August 22, 2022
    Publication date: January 26, 2023
    Inventors: Kai Zhang, Li Zhang, Ye-kui Wang, Zhipin Deng, Kui Fan, Jizheng Xu, Hongbin Liu
  • COMBINATION OF SUBPICTURES AND SCALABILITY
    Publication number: 20230023220
    Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a subpicture in a video picture of a video and a bitstream of the video according to a rule. The rule specifies that, in in case a subpicture is treated as a video picture for the conversion, a cross-layer alignment restriction is applied to less than all of the multiple layers including a current layer that includes the subpicture and a subset of layers associated with the current layer.
    Type: Application
    Filed: September 21, 2022
    Publication date: January 26, 2023
    Inventors: Ye-kui Wang, Li Zhang, Kai Zhang, Zhipin Deng
  • CONSTRAINS FOR DIFERENT CODING TOOLS
    Publication number: 20230027478
    Abstract: Methods, systems, apparatuses for video processing are described. A method for processing video includes performing a conversion between a video and a bitstream of the video according to a format rule, and wherein the format rule specifies to include, in a general constraint syntax structure associated with the video, one or more general constraint flags indicating whether corresponding syntax elements are included in a sequence parameter set (SPS) and/or a picture parameter set (PPS) and/or a picture header (PH) and/or a slice header (SH) or to constrain values of the syntax elements in the SPS and/or the PPS and/or the PH and/or the SH.
    Type: Application
    Filed: August 29, 2022
    Publication date: January 26, 2023
    Inventors: Zhipin Deng, Ye-kui Wang, Li Zhang, Kai Zhang, Kui Fan
  • Configurable Neural Network Model Depth In Neural Network-Based Video Coding
    Publication number: 20230023579
    Abstract: A method implemented by a video coding apparatus includes applying a neural network (NN) filter to an unfiltered sample of a video unit to generate a filtered sample, where the NN filter is based on a first NN filter model having a first depth, or a second NN filter model having a second depth, where the depth comprises a number of residual blocks of the respective NN filter model, and where the second depth is different than the first depth. The method also includes performing a conversion between a video media file and a bitstream based on the filtered sample.
    Type: Application
    Filed: June 23, 2022
    Publication date: January 26, 2023
    Inventors: Yue Li, Kai Zhang, Li Zhang
  • COMPOSITIONS COMPRISING PKC-BETA INHIBITORS AND PROCESSES FOR THE PREPARATION THEREOF
    Publication number: 20230028918
    Abstract: The present invention relates, in some respects, to methods of using, and compositions comprising, a protein kinase inhibitor and pharmaceutically acceptable salts, solvates, and hydrates thereof. In some embodiments, the present invention relates to modified or extended release pharmaceutical formulations in the form of particles which, in some embodiments, are used in a tablet, capsule, or particulate form, for slowly releasing the protein kinase inhibitor, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, over periods of time from at least 8 to 12 hours. The compositions of the present invention are useful in the treatment of PKC? related disorders.
    Type: Application
    Filed: December 4, 2020
    Publication date: January 26, 2023
    Inventors: Michael NIESMAN, Kai ZHANG, Kay OLMSTEAD
  • Construction method for a spatial motion candidate list
    Patent number: 11563972
    Abstract: Devices, systems, and methods for digital video coding, which includes constructing separate motion candidate lists for video coding, are described. An exemplary method for video processing includes constructing, for a first video block of a video, a first motion candidate list using a first motion candidate list construction method that excludes motion candidates that are only derived from temporal blocks, and performing a conversion between the first video block and a bitstream representation of the video including the first video block according to the constructed first motion candidate list.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: January 24, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Kai Zhang, Hongbin Liu, Jizheng Xu, Yue Wang
  • Multiple secondary transform matrices for video processing
    Patent number: 11563982
    Abstract: A video processing method is provided to comprise: performing a conversion between a current video block of a video and a coded representation of the current video block, wherein the coded representation conforms to a format rule specifying that a syntax element corresponding to side information of a secondary transform tool for the current video block is signaled in the coded representation before transform related information, wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization of the video block before applying an inverse primary transform.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: January 24, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Kai Zhang, Hongbin Liu, Yue Wang
  • Signaling for decoder-side intra mode derivation
    Patent number: 11563957
    Abstract: Example implementations include a method and of video processing, comprising determining, during a conversion between a current video unit of a video and a bitstream of the video, to apply a prediction mode derivation tool to the current video unit, wherein in the prediction mode derivation tool, at least one intra prediction mode (IPM) is derived for the current video unit based on cost calculations between reconstructed samples and prediction samples of a template region related the current video unit. The implementations further include performing the conversion based on the determining.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: January 24, 2023
    Assignee: Lemon Inc.
    Inventors: Yang Wang, Kai Zhang, Li Zhang, Yuwen He, Hongbin Liu
  • Coding of block vectors for intra block copy-coded blocks
    Patent number: 11563973
    Abstract: Methods, devices and systems for intra-block coding based decoding or encoding of video while using block vector signaling and/or merge candidates are disclosed. An example method for video processing includes performing a conversion between a video region of a video and a bitstream representation of the video, wherein the bitstream representation selectively includes motion vector difference (MVD) related syntax elements for an intra block copy (IBC) advanced motion vector prediction (AMVP) mode based on a maximum number of a first type of IBC candidates used during the conversion of the video region, wherein, when an IBC mode is applied, samples of the video region are predicted from other samples in a video picture corresponding to the video region.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: January 24, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Jizheng Xu, Kai Zhang, Hongbin Liu
  • IMPLICIT MULTIPLE TRANSFORM SET SIGNALING IN VIDEO CODING
    Publication number: 20230017146
    Abstract: Methods, system and apparatus for video processing are described. One example video processing method includes determining, for a conversion between a current video block of a video and a bitstream of the video, a usage of an identity transform mode for the conversion of the current video block according to a rule. The rule specifies that the usage is based on representative coefficients of one or more representative blocks of the video. The method also includes performing the conversion based on the determining.
    Type: Application
    Filed: September 7, 2022
    Publication date: January 19, 2023
    Inventors: Li Zhang, Kai Zhang, Yuhuai Zhang, Hongbin Liu, Yue Wang, Siwei Ma
  • INDICATION OF DIGITAL MEDIAL INTEGRITY
    Publication number: 20230020655
    Abstract: A method of digital media processing includes performing a conversion between a media segment and a bitstream of the media segment. The conversion conforming to a format rule and an encryption rule. The format rule specifying that verification information, which includes an indication of an integrity of a portion of the media segment, is signaled in the bitstream.
    Type: Application
    Filed: September 12, 2022
    Publication date: January 19, 2023
    Inventors: Jizheng XU, Ye-kui WANG, Li ZHANG, Kai ZHANG
  • DIRECTION-BASED PREDICTION FOR INTRA BLOCK COPY IN VIDEO CODING
    Publication number: 20230014129
    Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.
    Type: Application
    Filed: August 26, 2022
    Publication date: January 19, 2023
    Inventors: Jizheng Xu, Li Zhang, Kai Zhang, Hongbin Liu, Yue Wang
  • CODING OF MOTION INFORMATION
    Publication number: 20230014915
    Abstract: Implementations of the present disclosure provide a solution for encoding and decoding motion information. In this solution, during a conversion between a current video block of a video and a bitstream of the video, a group type of a subgroup of candidates of motion information for the current video block is determined, wherein the group type indicating whether the subgroup of candidates are to be reordered. Further, a list of candidates are constructed based on the group type; and the motion information for the current video block is derived from the list of candidates.
    Type: Application
    Filed: September 20, 2022
    Publication date: January 19, 2023
    Inventors: Na ZHANG, Kai Zhang, Li Zhang, Hongbin Liu, Yuwen He, Yue Wang
  • ORDER-BASED UPDATING FOR INTRA BLOCK COPY IN VIDEO CODING
    Publication number: 20230019459
    Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.
    Type: Application
    Filed: August 30, 2021
    Publication date: January 19, 2023
    Inventors: Jizheng XU, Li ZHANG, Kai ZHANG, Hongbin LIU, Yue WANG
  • Intra Block Copy Buffer And Palette Predictor Update
    Publication number: 20230020259
    Abstract: Methods and apparatus for video processing are described. One example method includes determining, for a conversion between a video block of a video and a bitstream of the video, that the video block satisfies a condition. The video block is coded in the bitstream using an intra block copy mode. The method further includes performing the conversion based on the determining. Here, due to the video block satisfying the condition, a portion of an intra block copy buffer is reset during the conversion.
    Type: Application
    Filed: September 19, 2022
    Publication date: January 19, 2023
    Inventors: Jizheng Xu, Li Zhang, Kai Zhang, Hongbin Liu
  • Configuring luma-dependent chroma residue scaling for video coding
    Patent number: 11558636
    Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video that is a chroma block and a coded representation of the video, wherein, during the conversion, the current video block is constructed based on a first domain and a second domain, and wherein the conversion further includes applying a forward reshaping process and/or an inverse reshaping process to one or more chroma components of the current video block.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: January 17, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Kai Zhang, Hongbin Liu, Jizheng Xu, Yue Wang
  • Coefficient dependent coding of transform matrix selection
    Patent number: 11558612
    Abstract: A video processing method includes checking, during a conversion from a coded representation of a current video block to the current video block, a position of a last non-zero coefficient of the current video block, wherein the position is relative to a top-left position of the current video block; and performing a determination, based on the position, whether or not to parse a syntax element which signals a transform information in the coded representation.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: January 17, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Hongbin Liu, Kai Zhang, Yue Wang
  • Restrictions on in-loop filtering
    Patent number: 11558644
    Abstract: Devices, systems and methods for digital video coding, which includes: determining whether a sample is located at sub-block transform boundaries in case that a sub-block transform is applied; applying deblocking filter process if it is determined that the sample is located at sub-block transform boundaries; and performing a conversion between the video and a bitstream representation of the video.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: January 17, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Kai Zhang, Hongbin Liu, Jizheng Xu, Yue Wang
  • Prediction refinement for combined inter intra prediction mode
    Patent number: 11558634
    Abstract: A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: January 17, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Hongbin Liu, Li Zhang, Kai Zhang, Jizheng Xu, Yue Wang
  • Hash-based motion searching
    Patent number: 11558638
    Abstract: Methods, systems and device for hash-based motion estimation in video coding are described. An exemplary method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, motion information associated with the current block using a hash-based motion search, a size of the current block being M×N, M and N being positive integers and M being not equal to N, applying, based on the motion information and a video picture comprising the current block, a prediction for the current block, and performing, based on the prediction, the conversion.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: January 17, 2023
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Jizheng Xu, Jiahao Li, Weijia Zhu, Kai Zhang, Li Zhang, Hongbin Liu, Yue Wang