Patents by Inventor Yingtao Li

Yingtao Li 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).

  • Method of transmission of image by CDMA system
    Patent number: 6407990
    Abstract: This invention discloses an image transmission method, which keeps the quality of the image transmission unchanged and increases the capacity for code division multiple access (CDMA) mobile communication system. By applying the subband coding with threshold method and differential perspective coding method, which change the image compression ratio and coding rate according to the characteristics of the image, the image transmission quality keeps unchanged. By changing the spread spectrum factor and adjusting the emission power accordingly or by applying the discontinuous emission mode without changing the spread spectrum factor, the purpose of increasing CDMA system capacity is reached.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: June 18, 2002
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yingtao Li, Shengxi Pan, Bingyu Qu