Patents by Inventor Po-Cheung Chen

Po-Cheung Chen 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).

  • Noise reduction method
    Patent number: 7133824
    Abstract: A noise reduction method partitions frequency band into multiple sub-bands and estimates the signal-to-noise ratio (SNR) value for each sub-band. An over-subtraction factor of each sub-band is determined based on the estimated SNR value. Then, the clean speech spectrum estimate is determined by performing spectral over-subtraction on each sub-band, so as to determine the clean speech signal from the estimated clean speech spectrum.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: November 7, 2006
    Assignee: Industrial Technology Research Institute
    Inventors: Kuo-Guan Wu, Po-Cheung Chen