Patents by Inventor Brian Michael McCarthy, Sr.

Brian Michael McCarthy, Sr. 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).

  • Tone detection
    Patent number: 6914979
    Abstract: A DFT is used to compute the magnitude and phase of the frequencies desired to be detected in a frame of sampled data by performing 2 dot products for each such frequency. The two dot products are calculated using the samples in the frame and an equal number of equally spaced cosine and sine coefficients for each frequency to be detected.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: July 5, 2005
    Assignee: Adaptive Digital Technologies, Inc.
    Inventors: Scott David Kurtz, Brian Michael McCarthy, Sr.
  • Echo canceller
    Patent number: 6766021
    Abstract: A method of echo cancellation for a signal transmission system in which the size of the step used to adapt filter coefficients is adjusted in accordance with the echo delay and in which stationary signals are avoided by determining when the mean and variance of coefficients obtained from a second order linear predictive coding analysis of successive far end samples exceed preset thresholds.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: July 20, 2004
    Assignee: Adaptive Digital Technologies
    Inventors: Scott David Kurtz, Brian Michael McCarthy, Sr.