Patents by Inventor Chris C Lee

Chris C Lee 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).

  • Adaptive postfiltering methods and systems for decoding speech
    Patent number: 8032363
    Abstract: A method of processing a decoded speech (DS) signal including successive DS frames, each DS frame including DS samples. The method comprises: adaptively filtering the DS signal to produce a filtered signal; gain-scaling the filtered signal with an adaptive gain updated once a DS frame, thereby producing a gain-scaled signal; and performing a smoothing operation to smooth possible waveform discontinuities in the gain-scaled signal.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: October 4, 2011
    Assignee: Broadcom Corporation
    Inventors: Juin-Hwey Chen, Jes Thyssen, Chris C Lee
  • Method and apparatus to eliminate discontinuities in adaptively filtered signals
    Patent number: 7353168
    Abstract: A method to eliminate discontinuities in an adaptively filtered signal includes filtering a beginning portion of a current signal frame using a past set of filter coefficients, thereby producing a first filtered frame portion. The method also includes filtering the beginning portion of the current signal frame using a current set of filter coefficients, thereby producing a second filtered frame portion. The method also includes modifying the second filtered frame portion with the first filtered frame portion so as to smooth a possible filtered signal discontinuity between the second filtered frame portion and a past filtered frame produced using the past filter coefficients.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: April 1, 2008
    Assignee: Broadcom Corporation
    Inventors: Jes Thyssen, Chris C Lee, Juin-Hwey Chen