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).

  • Patent number: 11089305
    Abstract: Disclosed are a video frame coding method performed at a terminal. The method includes: obtaining and coding an ith video frame in a group of pictures, and counting a quantity of actually consumed bits corresponding to the ith video frame; detecting a state of the ith video frame based on the quantity of actually consumed bits, an initial average bit rate of the group of pictures, a quantization model, and a video frame detection rule, and determining multiple quantization parameters of a (i+1)th video frame; and determining first quantities of allocated bits for compensation of first to-be-compensated video frames; updating the first coding rule according to a first quantity of allocated bits for compensation, the quantization parameters corresponding to the (i+1)th video frame, and coding the (i+1)th video frame.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: August 10, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Yaoyao Guo, Xunan Mao, Chenchen Gu, Xinwei Gao, Jing Lv
  • Patent number: 11070803
    Abstract: In a method for determining a coding cost of a coding unit (CU) that is performed by a server, a CU subject to predictive coding in an intra-frame prediction mode is determined. Pixel gradient information corresponding to the CU is performed. A division predecision on the CU is made according to the pixel gradient information. A first coding cost is determined as a second coding cost of the CU in a case that a result of the division predecision on the CU is negative. The second CU is used for determining a division policy of a coding tree unit (CTU) corresponding to the CU, and the first coding cost is a coding cost obtained by performing predictive coding on the CU by using a current size of the CU as a size of a prediction unit (PU).
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: July 20, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventor: Xunan Mao
  • Patent number: 11070817
    Abstract: A video encoding method is provided. A plurality of subunits is obtained by performing preset division on the current coding unit. A skip status of an intra-frame prediction mode corresponding to the current coding unit is determined according to differences between the plurality of subunits. In a case that the skip status of the intra-frame prediction mode corresponding to the current coding unit is determined to be skipped, execution of the intra-frame prediction mode for the current coding unit is skipped, and the current coding unit is encoded according to an inter-frame prediction mode.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: July 20, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventor: Xunan Mao
  • Patent number: 11044278
    Abstract: A transcoding capability configuration method that includes: separately obtaining capability information reported by at least two terminals, where the capability information includes first transcoding capability data and a service type of a service executed by the at least two terminals, and the at least two terminals belong to a same service group; determining, based on the first transcoding capability data and the service type of each of the at least two terminals, second transcoding capability data satisfying the at least two terminals; and sending the second transcoding capability data to each of the at least two terminals, so that each terminal configures a transcoding parameter based on the second transcoding capability data.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: June 22, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Yongfang Shi, Anlin Gao, Xunan Mao, Chenchen Gu
  • Patent number: 11032539
    Abstract: This application relates to a video coding method, including: obtaining a current video frame to be coded, and obtaining a predicted residual of a reference video frame of the current video frame in a case that the current video frame is an inter prediction frame; determining a quantization parameter threshold corresponding to the current video frame according to the predicted residual of the reference video frame; obtaining a quantization parameter estimated value corresponding to the current video frame; selecting a target coding mode from candidate coding modes according to the quantization parameter estimated value and the quantization parameter threshold, the candidate coding modes including a down-sampling mode and a full resolution mode; and coding the current video frame according to the target coding mode.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: June 8, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventor: Xunan Mao
  • Patent number: 10986332
    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: Grant
    Filed: April 2, 2019
    Date of Patent: April 20, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventor: Xunan Mao
  • Patent number: 10951905
    Abstract: A video transcoding method is described. A computer device obtains at least one initial quantization parameter used to encode at least one initial coding unit for generating an initial compressed video, and determines, according to the at least one initial quantization parameter, a current reference quantization parameter corresponding to a current coding unit in a current video frame that is generated by decoding the initial compressed video. The computer device determines an estimated quantization parameter for encoding the current coding unit, determines a first difference between the current reference quantization parameter and the estimated quantization parameter, and sets a target quantization parameter to be equal to or greater than the estimated quantization parameter according to the first difference. The computer device encodes the current coding unit according to the target quantization parameter.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: March 16, 2021
    Assignee: Tencent Technology (Shenzhen) Company Limited
    Inventors: Xunan Mao, Haixu Han, Xinwei Gao, Chenchen Gu, Jian He, Jingchang Chen
  • Patent number: 10944970
    Abstract: A video coding method can include receiving, by processing circuitry of a coding device, a current picture in a group of pictures (GOP) of a layered coding structure in video sequence. The current picture can have two reference pictures. A current layer of the current picture in the layered coding structure can be determined. A current quantization parameter (QP) offset of the current picture can be determined according to the current layer of the current picture. Reference QPs corresponding to the two reference pictures of the current picture can be determined. A current QP of the current picture can be determined according to the reference QPs and the current QP offset. The current picture can be coded according to the current QP.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: March 9, 2021
    Assignee: Tencent Technology (Shenzhen) Company Limited
    Inventor: Xunan Mao
  • Publication number: 20200396460
    Abstract: This application relates to a video decoding method performed at a computer device. The method includes: obtaining encoded data corresponding to a current video frame; obtaining a processing parameter corresponding to the current video frame; determining a target processing manner corresponding to the current video frame according to the processing parameter, the target processing manner being one of candidate processing manners, the candidate processing manners comprising at least one of a full resolution processing manner and a downsampling processing manner, and the processing parameter being consistent with a corresponding processing parameter in an encoding process; and decoding the encoded data corresponding to the current video frame according to the target processing manner, to obtain a corresponding decoded video frame. In the encoding method, a processing manner for a video frame can be flexibly selected, thereby improving video encoding quality in the case of limited bandwidth.
    Type: Application
    Filed: August 7, 2020
    Publication date: December 17, 2020
    Inventors: Xinwei GAO, Xunan MAO, Chenchen GU
  • Patent number: 10869048
    Abstract: Embodiments of this application disclose a picture transmission method performed at a computer device. After obtaining a picture, the computer device generates a video sequence by replicating the picture N times, and N being a positive integer. Next the computer device obtains a resolution setting sequence and encodes the N to-be-encoded pictures in the video sequence according to the resolution setting sequence to generate N encoded pictures, each encoded picture having an associated resolution setting. Finally, the computer device sends the N encoded pictures to a decoding computer device. The decoding computer device then decodes and displays the N encoded pictures according to their respective resolution settings from low to high.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: December 15, 2020
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Xunan Mao, Xinwei Gao, Tao Zhang, Licai Guo, Yongfang Shi, Anlin Gao, Haibo Deng, Yaoyao Guo, Chenchen Gu, Jian He, Jing Lv
  • Publication number: 20200389665
    Abstract: This application relates to a video encoding and decoding method. The video encoding method includes: obtaining a current frame from an input video; determining, from a plurality of processing modes, a target processing mode corresponding to the current frame, the candidate processing modes including a full-resolution processing mode or a downsampling processing mode; processing the current frame according to the target processing mode; and encoding the processed current frame according to resolution information to obtain encoded data corresponding to the current frame. According to the encoding method, a processing mode of a video frame can be flexibly selected, and a resolution of the input video frame is adaptively adjusted for encoding.
    Type: Application
    Filed: August 24, 2020
    Publication date: December 10, 2020
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: XINWEI GAO, XUNAN MAO, CHENCHEN GU
  • Publication number: 20200382792
    Abstract: The present disclosure provides a video coding method. The method includes obtaining an input video frame; obtaining, in response to a target processing method corresponding to the input video frame being a downsampling processing method, a sampling parameter corresponding to the input video frame, and determining downsampling information corresponding to the input video frame according to the sampling parameter, the sampling parameter being reproduced in a decoding process; and encoding the input video frame according to the downsampling information to obtain encoded data corresponding to the input video frame.
    Type: Application
    Filed: August 18, 2020
    Publication date: December 3, 2020
    Inventors: Xinwei GAO, Xunan MAO, Chenchen GU
  • Publication number: 20200382778
    Abstract: In a method for determining a coding cost of a coding unit (CU) that is performed by a server, a CU subject to predictive coding in an intra-frame prediction mode is determined. Pixel gradient information corresponding to the CU is performed. A division predecision on the CU is made according to the pixel gradient information. A first coding cost is determined as a second coding cost of the CU in a case that a result of the division predecision on the CU is negative. The second CU is used for determining a division policy of a coding tree unit (CTU) corresponding to the CU, and the first coding cost is a coding cost obtained by performing predictive coding on the CU by using a current size of the CU as a size of a prediction unit (PU).
    Type: Application
    Filed: August 18, 2020
    Publication date: December 3, 2020
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventor: Xunan MAO
  • Publication number: 20200382793
    Abstract: A video coding method includes obtaining an input video frame; determining down-sampling information corresponding to the input video frame in response to determining that a target processing manner corresponding to the input video frame is a down-sampling processing manner; encoding the input video frame according to the down-sampling information to obtain encoded data corresponding to the input video frame; and adding the down-sampling information to the encoded data according to a processing range corresponding to the down-sampling information. The down-sampling information is capable of identifying at least one of a down-sampling proportion and a down-sampling method for the input video frame or identifying a rule for identifying the at least one of a down-sampling proportion and a down-sampling method.
    Type: Application
    Filed: August 14, 2020
    Publication date: December 3, 2020
    Inventors: Xinwei GAO, Xunan MAO, Chenchen GU
  • Publication number: 20200382781
    Abstract: In a video encoding method, a to-be-encoded video is obtained. The video includes at least two video frames arranged in sequence. A quantization parameter and a quantization parameter threshold of an ith video frame is calculated, where i is a positive integer greater than or equal to 2. A coding resolution of the ith video frame is determined according to the quantization parameter and the quantization parameter threshold. The coding resolution is a first coding resolution in a case that the ith video frame is sampled, and the coding resolution is a second coding resolution in a case that the ith video frame is downsampled. Then the ith video frame is encoded at the coding resolution.
    Type: Application
    Filed: August 18, 2020
    Publication date: December 3, 2020
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Xunan MAO, Licai Guo, Yongfang Shi, Anlin Gao, Xinwei Gao, Tao Zhang, Haibo Deng, Chenchen GU, Jing Lv
  • Publication number: 20200374525
    Abstract: A video coding method includes: obtaining a current frame from a plurality of video frames to be encoded, the plurality of video frames having different resolutions; determining a target motion vector (MV) corresponding to each block in the current frame at a target resolution represented by selected target MV resolution information; obtaining a motion vector prediction (MVP) corresponding to each block and at the target resolution; and encoding the current frame according to a motion vector difference (MVD) between each target MV and the MVP of each block to obtain encoded data. The encoded data includes identification information representing the target resolution.
    Type: Application
    Filed: August 12, 2020
    Publication date: November 26, 2020
    Inventors: Xinwei GAO, Xunan MAO, Chenchen GU
  • Publication number: 20200374555
    Abstract: This application relates to a video encoding method performed at a computer device. The method includes: obtaining an input video frame; determining a processing parameter corresponding to the input video frame; selecting, from candidate processing manners according to the processing parameter, a target processing manner corresponding to the input video frame, the candidate processing manners comprising a full-resolution processing manner and a downsampling processing manner; and encoding the input video frame according to the target processing manner, to obtain encoded data corresponding to the input video frame. Therefore, the target processing manner of the input video frame can be flexibly selected, and the input video frame is encoded according to the target processing manner, to adaptively adjust a resolution of the input video frame, and improve video encoding quality.
    Type: Application
    Filed: August 7, 2020
    Publication date: November 26, 2020
    Inventors: Xinwei GAO, Xunan MAO, Chenchen GU
  • Publication number: 20200374547
    Abstract: This application relates to a method and apparatus, a storage medium, and a computer device for video encoding and decoding. The video encoding method includes: acquiring a reference frame corresponding to a current frame to be encoded from a video input; determining a sub-pixel interpolation mode, the sub-pixel interpolation mode comprising one of a direct sub-pixel interpolation mode or a sampled sub-pixel interpolation mode; processing the reference frame according to resolution information of the current frame using an interpolation in the sub-pixel interpolation mode, to obtain a corresponding target reference frame; and encoding the current frame according to the target reference frame, to obtain encoded data corresponding to the current frame. By using the foregoing video encoding method, a reference frame corresponding to a current frame to be encoded can be flexibly selected, thereby effectively improving the utilization efficiency of reference frames.
    Type: Application
    Filed: August 12, 2020
    Publication date: November 26, 2020
    Applicant: Tencent Technology (Shenzhen) Company Limited
    Inventors: Xinwei GAO, Xunan MAO, Chenchen GU
  • Publication number: 20200374511
    Abstract: The embodiments of this application relate to a video encoding method performed at a computer device. The video encoding method includes: during video encoding, obtaining an input video sequence; selecting, from candidate video sequence encoding modes, a target video sequence encoding mode corresponding to the input video sequence, the candidate video sequence encoding modes including a constant-resolution encoding mode and a mixed-resolution encoding mode; and encoding each input video frame of the input video sequence according to the target video sequence encoding mode, to obtain encoded data.
    Type: Application
    Filed: August 7, 2020
    Publication date: November 26, 2020
    Inventors: Xinwei GAO, Xunan MAO, Chenchen Gu
  • Publication number: 20200374546
    Abstract: A video coding method includes obtaining a current frame from a plurality of video frames, from which at least two or more video frames from have different resolutions; determining an initial motion vector (MV) corresponding to each block to be encoded in the current frame at a corresponding resolution; and determining a target MV resolution according to a resolution configuration of the current frame to represent a target resolution. The method also includes determining a target MV corresponding to each block in the current frame at the target resolution represented by the target MV resolution; obtaining a motion vector prediction (MVP) corresponding to each block in the current frame at the target resolution; and encoding the current frame according to a motion vector difference (MVD) between each target MV and the corresponding MVP such that the MV and the corresponding MVP are at a same resolution.
    Type: Application
    Filed: August 11, 2020
    Publication date: November 26, 2020
    Inventors: Xinwei Gao, Xunan Mao, Chenchen Gu