Patents by Inventor Ken-Chi Chen

Ken-Chi 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).

  • Method and related apparatus for stereo vocal cancellation
    Patent number: 6909787
    Abstract: Method and related apparatus for canceling vocal portions containing in two signals of two stereo channels and providing two corresponding output signals. The method includes: generating a mono signal according to a sum of the signals of the stereo channels; respectively performing vocal cancellation to each signal of one stereo channel according to a difference between the signal of the stereo channel and the mono signal, and performing low-frequency band and high-frequency band compensation to results of vocal cancellation to generate the two output signals. Because vocal cancellation is performed for respective signal of one stereo channel, the two output signals will have substantial difference in frequency band other than the high-frequency band to increase effect of stereo.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: June 21, 2005
    Assignee: Mediatek Incorporation
    Inventor: Ken-Chi Chen
  • METHOD AND RELATED APPARATUS FOR STEREO VOCAL CANCELLATION
    Publication number: 20050041814
    Abstract: Method and related apparatus for canceling vocal portions containing in two signals of two stereo channels and providing two corresponding output signals. The method includes: generating a mono signal according to a sum of the signals of the stereo channels; respectively performing vocal cancellation to each signal of one stereo channel according to a difference between the signal of the stereo channel and the mono signal, and performing low-frequency band and high-frequency band compensation to results of vocal cancellation to generate the two output signals. Because vocal cancellation is performed for respective signal of one stereo channel, the two output signals will have substantial difference in frequency band other than the high-frequency band to increase effect of stereo.
    Type: Application
    Filed: December 12, 2003
    Publication date: February 24, 2005
    Inventor: Ken-Chi Chen