Patents by Inventor Stephen McGrath

Stephen McGrath 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).

  • Patent number: 7778149
    Abstract: A system for providing a fast access channel is disclosed. The system includes a transmitter configured to transmit a first long contention symbol and one or more subsequent long contention symbols. The first long contention symbol is followed by the subsequent long contention symbols. The system further includes a receiver configured to receive the first and subsequent long contention symbols and determine a contention code and a contention channel transmitted with the contention code based on the first and subsequent long contention symbols. Each of the first and subsequent long contention symbols includes a long cyclic prefix and a number of identical contention symbols.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: August 17, 2010
    Inventors: Stephen McGrath, Ian Sayers, Daryl Kaiser
  • Patent number: 6453285
    Abstract: A system and method for removing noise from a signal containing speech (or a related, information carrying signal) and noise. A speech or voice activity detector (VAD) is provided for detecting whether speech signals are present in individual time frames of an input signal. The VAD comprises a speech detector that receives as input the input signal and examines the input signal in order to generate a plurality of statistics that represent characteristics indicative of the presence or absence of speech in a time frame of the input signal, and generates an output based on the plurality of statistics representing a likelihood of speech presence in a current time frame; and a state machine coupled to the speech detector and having a plurality of states. The state machine receives as input the output of the speech detector and transitions between the plurality of states based on a state at a previous time frame and the output of the speech detector for the current time frame.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: September 17, 2002
    Assignee: Polycom, Inc.
    Inventors: David V. Anderson, Stephen McGrath, Kwan Truong
  • Publication number: 20020112272
    Abstract: The present invention is an improved glove having a fit enhancing, moisture absorbent component attached to the interior of the gauntlet of the glove on at least a portion thereof. The fit-enhancing, moisture absorbent component, or gauntlet insert, provides a closer fit of the glove around the wearer's wrist than the fit provided by the glove shell itself in the absence of the gauntlet insert. In addition, the gauntlet insert provides moisture absorption to collect perspiration which runs from the hand to the wrist area, as well as perspiration which runs from the arm toward the hand during use by the wearer. Both the fit and absorption features of the gauntlet insert provide for improved tactility, dexterity and comfort to the wearer during use.
    Type: Application
    Filed: December 18, 2000
    Publication date: August 22, 2002
    Inventors: Gregory D. Culler, Francis J. Masley, Stephen McGrath
  • Patent number: 6351731
    Abstract: An adaptive filter is provided featuring a speech spectrum estimator receiving as input an estimated spectral magnitude signal for a time frame of the input signal and generating an estimated speech spectral magnitude signal representing estimated spectral magnitude values for speech in a time frame. A spectral gain generator receives as input the estimated spectral magnitude signal and the estimated speech spectral magnitude signal and generates as output an initial spectral gain signal that yields an estimate of speech spectrum in a time frame of the input signal when the initial spectral gain signal is applied to the spectral signal. A spectral gain modifier receives as input the initial spectral gain signal and generates a modified gain signal by limiting a rate of change of the initial spectral gain signal with respect to the spectral gain over a number of previous time frames. The modified gain signal is then applied to the spectral signal, which is then converted to its time domain equivalent.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: February 26, 2002
    Assignee: Polycom, Inc.
    Inventors: David V. Anderson, Stephen McGrath, Kwan Truong
  • Patent number: 5119046
    Abstract: An asymmetrically shaped jacketed coaxial electrical cable having a drain wire in which the drain wire is aligned parallel to the asymmetric edge or corner of the cable for fast and accurate termination of the cable.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: June 2, 1992
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Edward L. Kozlowski, Jr., Stephen McGrath