Patents by Inventor Xunan MAO

Xunan MAO 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).

  • Publication number: 20190253709
    Abstract: A method and apparatus for determining division of a coding unit, a and a readable storage medium are provided. The method includes: determining whether a size of a current coding unit is greater than a size of a smallest coding unit; obtaining a gradient of the current coding unit when the size of the current coding unit is greater than the size of the smallest coding unit; determining to divide the current coding unit when the gradient of the current coding unit is not less than a first threshold; and when the gradient of the current coding unit is less than a first threshold, obtaining gradients of sub-coding units included in the current coding unit; and determining, according to the gradients of the sub-coding units, whether to divide the current coding unit.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Inventor: Xunan MAO
  • Publication number: 20190230349
    Abstract: Embodiments of the present application relate to a prediction mode selection method performed at a video encoding device, including: acquiring a first optimal intra-frame prediction mode of a downsampled unit obtained by downsampling an image frame to which a target prediction unit belongs and then dividing the downsampled image frame, and the first optimal intra-frame prediction mode obtained by performing precoding analysis on the downsampled unit; adding a candidate intra-frame prediction mode to a candidate mode set according to the first optimal intra-frame prediction mode; adding a candidate intra-frame prediction mode to the candidate mode set according to a second optimal intra-frame prediction mode of an adjacent PU corresponding to the target PU; and determining an optimal intra-frame prediction mode of a current PU according to prediction residuals and encoding cost values corresponding to the candidate intra-frame prediction modes in the candidate mode set.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 25, 2019
    Inventor: Xunan MAO
  • Publication number: 20190222838
    Abstract: Embodiments of this application provide a video coding processing method and apparatus and a storage medium. The method includes: identifying a to-be-coded macroblock in a to-be-coded video frame; obtaining an inter-frame coding cost of the to-be-coded macroblock based on at least one inter-frame coding scheme; obtaining an intra-frame coding cost of the to-be-coded macroblock based on at least one intra-frame coding scheme; comparing the inter-frame coding cost with the intra-frame coding cost, to obtain a comparison result; determining a coding scheme of the to-be-coded macroblock based on the comparison result, the coding scheme including intra-frame predictive coding and inter-frame predictive coding; and coding the to-be-coded macroblock according to the coding scheme.
    Type: Application
    Filed: March 27, 2019
    Publication date: July 18, 2019
    Inventor: Xunan MAO
  • Publication number: 20190222849
    Abstract: A bit rate allocation method is provided for a bit rate allocation device. The method includes obtaining an intra prediction frame (I-frame) of a to-be-encoded video, and obtaining a bit-rate characteristic parameters associated with the I-frame. The bit-rate characteristic parameters include a number of video frames in a group-of-picture (GOP) in which the I-frame is located, a pixel number of the I-frame, and a proportion of an inter prediction macroblock in a historical inter prediction frame (P-frame) before the I-frame. The method also includes determining an allocated bit rate of the I-frame according to each bit-rate characteristic parameter.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Inventors: Xunan MAO, Chenchen GU, Yongfang SHI, Anlin GAO
  • Publication number: 20190182480
    Abstract: A method and an apparatus for processing a video bitrate, a storage medium, and an electronic device are provided. The method is performed by at least one processor and includes acquiring a number of video frames included in a current group of pictures, a starting frame of the current group of pictures being a current I frame, acquiring a target bitrate of the current I frame, based on the number of the video frames included in the current group of pictures, and encoding the current I frame, based on the target bitrate.
    Type: Application
    Filed: August 30, 2017
    Publication date: June 13, 2019
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Xunan MAO, Chenchen GU, Yongfang SHI, Anlin GAO
  • Patent number: 10097821
    Abstract: The present invention provides a hybrid-resolution encoding and decoding method. The method includes performing full-resolution standard coding on an I frame that adopts only intra-frame coding in a video frame sequence, and performing frame reconstruction to obtain a reconstructed frame of the I frame; performing down-sampling on the reconstructed frame of the I frame to obtain a first sampling image of the reconstructed frame of the I frame; performing down-sampling on a non-I frame in the video frame sequence to obtain a second sampling image of the non-I frame; performing standard coding on the second sampling image of the non-I frame by using the first sampling image of the reconstructed frame of the I frame that corresponds to the non-I frame as a reference frame; and sending a video code stream that includes the full-resolution standard coded I frame and the standard coded non-I frame.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 9, 2018
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Chenchen Gu, Xunan Mao, Jingchang Chen, Jing Lv, Ronggang Wang, Bocheng Xin, Wen Gao
  • Publication number: 20180234116
    Abstract: The application discloses video data redundancy control methods and apparatuses. Video packet redundancy control information is determined according to packet loss at a reception apparatus. The video packet redundancy control information is received from the reception apparatus. Video data is encoded according to the video packet redundancy control information to obtain encoded video data of a plurality of frames by a transmission apparatus. A frame-level redundancy budget is allocated for one of the plurality of frames according to the video packet redundancy control information. Further, the one of the plurality of frames is packetized according to the frame-level redundancy budget to generate a packetized frame. Redundancy coding is performed on the packetized frame to generate video packets including data packets and redundant packets for transmission to the reception apparatus.
    Type: Application
    Filed: April 17, 2018
    Publication date: August 16, 2018
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Yongfang SHI, Anlin Gao, Jing Lv, Jingchang Chen, Jian He, Chenchen Gu, Xunan Mao, Haibo Deng, Licai Guo, Chao Dai, Xun Zhang
  • Publication number: 20170353720
    Abstract: Provided are a prediction mode selection method, apparatus and system related to the field of video coding.
    Type: Application
    Filed: August 24, 2017
    Publication date: December 7, 2017
    Inventor: Xunan Mao
  • Publication number: 20140140407
    Abstract: The present invention provides a hybrid-resolution encoding and decoding method. The method includes performing full-resolution standard coding on an I frame that adopts only intra-frame coding in a video frame sequence, and performing frame reconstruction to obtain a reconstructed frame of the I frame; performing down-sampling on the reconstructed frame of the I frame to obtain a first sampling image of the reconstructed frame of the I frame; performing down-sampling on a non-I frame in the video frame sequence to obtain a second sampling image of the non-I frame; performing standard coding on the second sampling image of the non-I frame by using the first sampling image of the reconstructed frame of the I frame that corresponds to the non-I frame as a reference frame; and sending a video code stream that includes the full-resolution standard coded I frame and the standard coded non-I frame.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 22, 2014
    Applicant: Tencent Technology (Shenzhen) Company Limited
    Inventors: Chenchen YU, Xunan MAO, Jingchang CHEN, Jing LV, Ronggang WANG, Bocheng XIN, Wen GAO