Patents by Inventor Keping Chen

Keping 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).

  • Digital signal transcoder and method of transcoding a digital signal
    Patent number: 5610942
    Abstract: A method and device for transcoding a digital signal first oversamples the input signal, converts the sampling rate to an oversampled output signal, filters the signal to reduce unwanted bands and decimates the oversampled output signal to produce a transcoded signal having the target sampling rate. This allows the conversion to be implemented in the composite domain, requiring a single sampling rate converter, and significantly reduces the complexity of the filter required to filter the output signal.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: March 11, 1997
    Inventors: Keping Chen, Richard A. Kupnicki