Patents by Inventor Qingxi He

Qingxi He 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).

  • Encoder using coding tree unit level adaptive quantization mode to adjust frame level quantization parameter and associated signal processing method
    Patent number: 11523117
    Abstract: An encoder includes a frame level processing circuit, a coding tree unit (CTU) level processing circuit and an encoding circuit. The frame level processing circuit is arranged to calculate a bit number of a current frame according a target bitrate and a frame rate, and the frame level processing circuit is further arranged to calculate a quantization parameter of the current frame according to the bit number of the current frame and at least one parameter. The CTU level processing circuit is arranged to use an adaptive quantization mode to adjust the quantization parameter to generate an adjusted quantization parameter. The encoding circuit is arranged to encode the current frame to generate output data according to the adjusted quantization parameter.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: December 6, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Li, QingXi He, Wujun Chen, Rong Zhang
  • ENCODER USING CODING TREE UNIT LEVEL ADAPTIVE QUANTIZATION MODE TO ADJUST FRAME LEVEL QUANTIZATION PARAMETER AND ASSOCIATED SIGNAL PROCESSING METHOD
    Publication number: 20220303538
    Abstract: An encoder includes a frame level processing circuit, a coding tree unit (CTU) level processing circuit and an encoding circuit. The frame level processing circuit is arranged to calculate a bit number of a current frame according a target bitrate and a frame rate, and the frame level processing circuit is further arranged to calculate a quantization parameter of the current frame according to the bit number of the current frame and at least one parameter. The CTU level processing circuit is arranged to use an adaptive quantization mode to adjust the quantization parameter to generate an adjusted quantization parameter. The encoding circuit is arranged to encode the current frame to generate output data according to the adjusted quantization parameter.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 22, 2022
    Inventors: Weimin Zeng, Chi-Wang Chai, Wei Li, QingXi He, Wujun Chen, Rong Zhang
  • Device and method of handling multiple formats of a video sequence
    Patent number: 10972767
    Abstract: A transmitter for handling multiple formats of a video sequence, comprises a preprocessing module, for receiving a first format of a video sequence, to generate metadata of a second format of the video sequence according to the first format of the video sequence and the second format of the video sequence; and an encoder, couple to the preprocessing module, for transmitting the first format of the video sequence and the metadata in a bit stream to a receiver.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: April 6, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Lingzhi Liu, Li Liu, Jing Wang, Wujun Chen, Qingxi He, Wei Pu, Weimin Zeng, Chi-Wang Chai
  • Device and Method of Handling Multiple Formats of a Video Sequence
    Publication number: 20190132617
    Abstract: A transmitter for handling multiple formats of a video sequence, comprises a preprocessing module, for receiving a first format of a video sequence, to generate metadata of a second format of the video sequence according to the first format of the video sequence and the second format of the video sequence; and an encoder, couple to the preprocessing module, for transmitting the first format of the video sequence and the metadata in a bit stream to a receiver.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 2, 2019
    Inventors: Lingzhi Liu, Li Liu, Jing Wang, Wujun Chen, Qingxi He, Wei Pu, Weimin Zeng, Chi-Wang Chai