Patents by Inventor Shuzheng XU

Shuzheng XU 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 and system for digital watermarking
    Patent number: 9466304
    Abstract: The present invention is a system and method for digital watermarking, which discloses a system for digital watermarking, to add a watermark to an audio signal generated by a signal source. The system comprises: a spectrum modulator configured to perform spectrum modulation to a watermark bit and a pseudo noise signal to be embedded into the audio signal to generate a modulated signal; a distortion controller coupled to the signal source and the spectrum modulator and configured to shape the modulated signal based on the audio signal, so as to generate a shaped signal satisfying a predetermined distortion constraint; and an interference compensator coupled to the signal source and the distortion controller and configured to generate a compensation signal based on the audio signal, the pseudo noise signal, and the shaped signal, wherein the compensation signal is for compensating for interference to watermark decoding caused by the audio signal.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: October 11, 2016
    Assignees: STMICROELECTRONICS INTERNATIONAL N.V., STMICROELECTRONICS ASIA PACIFIC PTE. LTD.
    Inventors: Peng Zhang, Shuzheng Xu, Pengjun Wang, Sapna George, Huazhong Yang
  • METHOD AND SYSTEM FOR DIGITAL WATERMARKING
    Publication number: 20160012826
    Abstract: The present invention is a system and method for digital watermarking, which discloses a system for digital watermarking, to add a watermark to an audio signal generated by a signal source. The system comprises: a spectrum modulator configured to perform spectrum modulation to a watermark bit and a pseudo noise signal to be embedded into the audio signal to generate a modulated signal; a distortion controller coupled to the signal source and the spectrum modulator and configured to shape the modulated signal based on the audio signal, so as to generate a shaped signal satisfying a predetermined distortion constraint; and an interference compensator coupled to the signal source and the distortion controller and configured to generate a compensation signal based on the audio signal, the pseudo noise signal, and the shaped signal, wherein the compensation signal is for compensating for interference to watermark decoding caused by the audio signal.
    Type: Application
    Filed: March 23, 2015
    Publication date: January 14, 2016
    Inventors: Peng ZHANG, Shuzheng XU, Pengjun WANG, Sapna GEORGE, Huazhong YANG