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).

  • Signaling of Picture Header in Video Coding
    Publication number: 20220217413
    Abstract: A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), the PU including a picture header (PH) network abstraction layer (NAL) unit having a picture header NAL unit type (PH_NUT) and an associated video coding layer (VCL) NAL unit, the PH_NUT signifying that a layer identifier (ID) of the PH NAL unit is equal to a layer ID of the associated video coding layer (VCL) NAL unit and a temporal ID of the PH NAL unit is equal to a temporal ID of the PU; and decoding a coded picture from the PU to obtain a decoded picture.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Inventors: FNU Hendry, Ye-Kui Wang, Jianle Chen
  • Error Mitigation For Sublayers In Video Coding
    Publication number: 20220217395
    Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising a video parameter set (VPS) and one or more sublayers. A buffering period (BP) supplemental enhancement information (SEI) message comprising a BP maximum sublayers minus one (bp_max_sublayers_minus1) is also encoded into the bitstream. The bp_max_sublayers_minus1 is set to a value in a range of zero to a maximum number of sublayers indicated in the VPS. A hypothetical reference decoder (HRD) is initialized based on the BP SEI message. A set of bitstream conformance tests are performed on the sublayers. The bitstream is stored for communication toward a decoder.
    Type: Application
    Filed: March 24, 2022
    Publication date: July 7, 2022
    Inventor: Ye-Kui Wang
  • Temporal Identifier Constraints For SEI Messages
    Publication number: 20220217387
    Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a coded picture in one or more video coding layer (VCL) network abstraction layer (NAL) units in a bitstream. A non-VCL NAL unit is encoded into the bitstream such that a temporal identifier (TemporalId) for the non-VCL NAL unit is constrained to be equal to a TemporalId of an access unit (AU) containing the non-VCL NAL unit when a NAL unit type (nal_unit_type) of the non-VCL NAL indicates a supplemental enhancement information (SEI) message. A set of bitstream conformance tests is performed on the bitstream based on the SEI message. The bitstream is stored for communication toward a decoder.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 7, 2022
    Inventor: Ye-Kui Wang
  • SEI Message For Single Layer OLS
    Publication number: 20220217393
    Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more output layer sets (OLSs). A non-scalable-nested supplemental enhancement information (SEI) message is also encoded into the bitstream. The non-scalable-nested SEI message is constrained to apply only to a zeroth (0-th) OLS. The 0-th OLS includes only an output layer. A set of bitstream conformance tests are performed on the 0-th OLS based on the non-scalable-nested SEI message. The bitstream is stored for communication toward a decoder.
    Type: Application
    Filed: March 24, 2022
    Publication date: July 7, 2022
    Inventor: Ye-Kui Wang
  • SUPPORT OF MIXED IRAP AND NON-IRAP PICTURES WITHIN AN ACCESS UNIT IN MULTI-LAYER VIDEO BITSTREAMS
    Publication number: 20220217369
    Abstract: A method of decoding implemented by a video decoder is provided. The method includes receiving a bitstream including a coded video sequence start (CVSS) access unit (AU), wherein the CVSS AU contains a picture unit (PU) for each layer, and wherein a coded picture in each PU is a coded layer video sequence start (CLVSS) picture; identifying the coded picture from one of the layers based on a picture order count (POC) value; and decoding the coded picture to obtain a decoded picture.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 7, 2022
    Inventor: Ye-Kui Wang
  • Signaling of Picture Header in Video Coding
    Publication number: 20220217392
    Abstract: A method of decoding is provided. The method includes receiving a picture unit (PU) including zero or one picture header (PH) network abstraction layer (NAL) unit and only one coded picture; and decoding the only one coded picture from the PU to obtain a decoded picture. A corresponding method of encoding is also provided. The method includes generating a PU including zero or one PH NAL units and only one coded picture; encoding the PU into a video bitstream; and storing the video bitstream for communication toward a video decoder.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Inventors: FNU Hendry, Ye-Kui Wang, Jianle Chen
  • OLS For Multiview Scalability
    Publication number: 20220210458
    Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising an output layer set (OLS) and a video parameter set (VPS). The OLS includes one or more layers of coded pictures and the VPS includes an OLS mode identification code (ols_mode_idc) specifying that for each OLS, all layers in the each OLS are output layers. The output layers are determined based on the ols_mode_idc in the VPS. A coded picture from the output layers is decoded to produce a decoded picture. The decoded picture is forwarded for display as part of a decoded video sequence.
    Type: Application
    Filed: March 21, 2022
    Publication date: June 30, 2022
    Inventor: Ye-Kui Wang
  • METHODS TO APPLY MICROLENS ON SMALL APERTURE PHOTODETECTORS AND VCSEL FOR HIGH DATA RATE APPLICATIONS
    Publication number: 20220209496
    Abstract: Data rate that can be supported by a photodetector can be limited by the aperture size of the photodetector. In some embodiments, the minimum aperture diameter can be about 30 um. This limitation is due, for example, to an inability of the optics to focus the beam to a smaller spot, and the mechanical tolerances of the assembly process. The techniques described in the present disclosure can reduce the optical spot size and improve on the mechanical tolerances that are achievable, thereby improving the photodetector and VCSEL manufacturing processes and systems. A photodetector or VCSEL system design with higher data rate and lower production cost can be achieved using the techniques described herein.
    Type: Application
    Filed: October 25, 2021
    Publication date: June 30, 2022
    Applicant: Broadcom International Pte. Ltd.
    Inventors: Tak Kui Wang, Rashit Nabiev, Ramana M.V. Murty, Laura M. Giovane
  • SIGNALING SUBPICTURE IDS IN SUBPICTURE BASED VIDEO CODING
    Publication number: 20220210477
    Abstract: A method of video decoding comprises receiving a bitstream including a SPS, a PPS, and subpictures associated with a subpicture ID mapping. A determination is made of whether an SPS flag has a first or second value. The SPS flag having the first value specifies that the subpicture ID mapping is signaled in the SPS, and the second value specifies that the subpicture ID mapping is signaled in the PPS. The subpicture ID mapping is obtained from the SPS when the SPS flag has the first value and from the PPS when the SPS flag has the second value or the PPS flag has the first value.
    Type: Application
    Filed: March 16, 2022
    Publication date: June 30, 2022
    Inventor: Ye-Kui Wang
  • Virtual reality video signaling in dynamic adaptive streaming over HTTP
    Patent number: 11375291
    Abstract: A device for processing media data is configured to receive media data including virtual reality (VR) video data; determine, based at least in part on data signaled at an adaptation set level of a media presentation description for a media presentation, a projection mapping used in the media presentation; process segments of a video representation of the media presentation based on the projection mapping used in the media presentation. A device for processing media data is configured to generate media data that includes VR video data; include in the media data, data signaled at an adaptation set level of a media presentation description that identifies a projection mapping used in media presentation included in the media data; and send segments of a video representation of the media presentation based on the projection mapping used in the media presentation.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: June 28, 2022
    Assignee: QUALCOMM Incorporated
    Inventor: Ye-Kui Wang
  • Reference Picture Management in Video Coding
    Publication number: 20220201284
    Abstract: A method of decoding a coded video bitstream. The method includes obtaining a first reference picture list of a current slice represented in the coded video bitstream and a second reference picture list of the current slice, and marking a status of a reference picture in a decoded picture buffer (DPB) based on the first reference picture list and the second reference picture list when the current slice is a first slice in a current picture to which the current slice belongs. The status of the reference picture in the decoded picture buffer is used for short-term reference, used for long-term reference, or unused for reference. The method also includes using the reference picture in a reconstructing process of the current picture or a picture following the current picture when the status of the reference picture is used for short-term reference or used for long-term reference.
    Type: Application
    Filed: January 18, 2022
    Publication date: June 23, 2022
    Inventors: FNU Hendry, Ye-Kui Wang
  • Media data transmission method, client, and server
    Patent number: 11368729
    Abstract: A media data transmission method and an apparatus. The method includes: A client sends first information to a server. The client receives video data packets that correspond to a second target video picture and that are sent by the server. The first information is used to indicate spatial information of a region in which a first target video picture is located, and the first target video picture includes a video picture within a current viewport. The second target video picture includes the first target video picture, at least one of the video data packets corresponding to the second target video picture carries at least one piece of second information, and the second information is used to indicate spatial information of a region in which the second target video picture is located.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: June 21, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Huameng Fang, Yuqun Fan, Peiyun Di, Ye-Kui Wang
  • Simulcast Layers For Multiview In Video Coding
    Publication number: 20220191533
    Abstract: A video coding mechanism is disclosed. The mechanism includes encoding a bitstream comprising one or more layers of coded pictures. A video parameter set (VPS) is also encoded into the bitstream. The VPS includes an each layer is an output layer set (OLS) flag (each_layer_is_an_ols_flag) when all layers specified by the VPS are independently coded without inter-layer prediction. The each_layer_is_an_ols_flag specifies whether each OLS contains only one layer. The bitstream is stored for communication toward a decoder.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Inventor: Ye-Kui Wang
  • MULTI-LEVEL CONVERTER WITH TRIANGLE TOPOLOGY AND CONTROL METHOD THEREOF
    Publication number: 20220181993
    Abstract: The present disclosure provides a multi-level converter with triangle topology and control method thereof, related to the technical field of multi-level converters. In the converter, n DC capacitors connected in series form a vertical edge of a triangle and are as a DC bus, n switching tubes connected in series form a bevel edge of the triangle, switching tubes each connected between a neutral point of the DC bus corresponding to each layer and a point for connecting the switching tube on the bevel edge form a horizontal edge. Each time the layer is expanded by one, the number of levels increases by one. When a voltage across each capacitor is E, an AC output terminal Xn may output a total of n+1 levels.
    Type: Application
    Filed: November 25, 2021
    Publication date: June 9, 2022
    Inventors: Kui WANG, Zedong ZHENG, Lie XU, Yongdong LI
  • Tile Group Signaling In Video Coding
    Publication number: 20220174290
    Abstract: An encoding device configured to encode a flag, that indicates whether tile information for a picture having a tile group is present in a parameter set of a video bitstream or in a slice header of the video bitstream, into the video bitstream, encode the tile information in the parameter set when the flag indicates the tile information for the picture is encoded in the parameter set, and encode the tile information in the slice header when the flag indicates the tile information for the picture is encoded in the slice header.
    Type: Application
    Filed: February 14, 2022
    Publication date: June 2, 2022
    Inventors: FNU Hendry, Ye-Kui Wang
  • MAGNETIC REFRIGERATION DEVICE
    Publication number: 20220170674
    Abstract: Provided is a magnetic refrigeration device, including a first assembly and a second assembly, herein the second assembly is an annular assembly, the first assembly is located on a radial outer side or a radial inner side of the second assembly, the first assembly is a first magnet assembly, the second assembly is provided with an air gap space capable of accommodating a magnetic working medium bed, the first assembly is configured to rotate relative to the second assembly, and directions of a magnetic line of force of the first magnet assembly are distributed in the circumferential direction of the annular second assembly.
    Type: Application
    Filed: December 16, 2019
    Publication date: June 2, 2022
    Inventors: Kui Wang, Sheng Luo, Rong Yang
  • Types of Reference Pictures in Reference Picture Lists
    Publication number: 20220166970
    Abstract: A method of decoding includes receiving a coded video bitstream including a current picture; deriving a first reference picture list and a second reference picture list for each slice of the current picture; determining that the current picture is a clean random access (CRA) picture, the CRA picture signifying that there shall be no picture referred to by an entry in the first reference picture list or the second reference picture list that precedes, in an output order or a decoding order, any preceding intra random access point (IRAP) picture in the decoding order; and decoding each slice of the CRA picture based on one or both of the first reference picture list and the second reference picture list.
    Type: Application
    Filed: December 30, 2021
    Publication date: May 26, 2022
    Inventors: Ye-Kui Wang, FNU Hendry
  • External Decoding Refresh (EDR) In Video Coding
    Publication number: 20220159245
    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: Application
    Filed: February 3, 2022
    Publication date: May 19, 2022
    Inventors: Ye-Kui Wang, FNU Hendry, Jianle Chen
  • Slicing And Tiling In Video Coding
    Publication number: 20220159313
    Abstract: A video coding mechanism is disclosed. The mechanism includes receiving at a decoder, a bitstream including a video coding layer (VCL) network abstraction layer (NAL) unit containing a slice of image data divided into a plurality of tiles. A number of the tiles in the VCL NAL unit are determined. A number of entry point offsets for the tiles is also determined as one less than the number of the tiles in the VCL NAL unit. Each entry point offset indicates a starting location of a corresponding tile in the VCL NAL unit. The number of entry point offsets is not explicitly signaled in the bitstream. The entry point offsets for the tiles are obtained based on the number of entry point offsets. The tiles are decoded at the entry point offsets to generate a reconstructed image.
    Type: Application
    Filed: February 4, 2022
    Publication date: May 19, 2022
    Inventors: Ye-Kui Wang, FNU Hendry, Jianle Chen
  • REGIONAL RANDOM ACCESS IN PICTURES
    Publication number: 20220159272
    Abstract: In general, the disclosure to techniques for regional random access within a picture of video data. For example, a video coding device receives a plurality of pictures in a coding order. Each respective picture of the plurality of pictures comprises a plurality of regions. For a first region in a first picture of the plurality of pictures, the video coding device determines that the first region is codable independent from each other region of the first picture and from a first region in a second picture preceding the first picture in the coding order and, responsive to making such a determination, determine that the first region in the first picture has random accessibility. The video coding device codes each video block in the first region independent from any video blocks outside of the first region.
    Type: Application
    Filed: November 22, 2021
    Publication date: May 19, 2022
    Inventors: Fnu Hendry, Ye-Kui Wang