Patents by Inventor Xueming Lin

Xueming Lin 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).

  • System and method for echo cancellation over asymmetric spectra
    Patent number: 6421377
    Abstract: The present invention generally relates to echo cancellation over an asymmetric transmission and receiving spectra. An apparatus is provided having a transmit path and a receive path, with an adaptive echo canceler disposed therebetween, for communicating data within a first bandwidth and a second bandwidth respectively. A first decimator is disposed between the transmit path and the echo canceler circuit and filters an incoming signal having a first sampling rate and emits a signal output at a second, reduced sampling rate. A second decimator is disposed along said receive path and filters an incoming signal and emits a signal output at a reduced sampling rate. An adder is disposed to subtract the output of the adaptive echo canceler from output of the second decimator to generate a received signal that is substantially free of echo.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: July 16, 2002
    Assignee: GlobespanVirata, Inc.
    Inventors: Ehud Langberg, Xueming Lin, Weimin Liu, Wenye Yang