Patents by Inventor Robert C. Cheng

Robert C. Cheng 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 apparatus for audio signal processing
    Patent number: 6476878
    Abstract: The method, apparatus, and system for controlling audio anomalies by using a mute switch 51 to prevent output of an auxiliary audio signal 21 in a television signal 20 with an auxiliary audio signal 21, such as a NICAM audio signal or dual language audio signal, adjacent to a first audio signal 22. The mute switch 51 operation is a function of the type of receiver 19 receiving television signal 20 and a function of verifying the presence of an auxiliary audio signal 21 in television signal 20. The present invention controls audio anomalies such as audio whistle and audio pop.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: November 5, 2002
    Assignee: Scientific-Atlanta, Inc.
    Inventors: William P. Lafay, Robert C. Cheng, Benny Hsu, Martin Taylor