Patents by Inventor Scott H. Foster

Scott H. Foster 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).

  • Method and apparatus for canceling leakage from a speaker
    Patent number: 5815578
    Abstract: A system and method are disclosed for canceling the leakage from a speaker.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: September 29, 1998
    Assignee: Aureal Semiconductor, Inc.
    Inventors: Scott H. Foster, Martin J. Walsh
  • Method and apparatus for efficient presentation of high-quality three-dimensional audio
    Patent number: 5596644
    Abstract: Spatialization of soundfields is accomplished by filtering audio signals using filters having unvarying frequency response characteristics and amplifying signals using amplifier gains adapted in response to signals representing sound source location and/or listener position. The filters are derived using a singular value decomposition process which finds the best set of component impulse responses to approximate a given set of head related transfer functions. Efficient implementations for rendering reflection effects, and for spatializing multiple sound sources and/or generating multiple output signals are disclosed.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: January 21, 1997
    Assignee: Aureal Semiconductor Inc.
    Inventors: Jonathan S. Abel, Scott H. Foster
  • Spread spectrum optical time domain reflectometer
    Patent number: 5000568
    Abstract: An optical time domain reflectometer that injects at least two complementary code sequences into an optical fiber and detects the return signal produced by each of these code sequences. These return signals are processed to extract the function h.sub.k that is equal to the response function for the fiber when a single pulse is injected into the fiber. This processing utilizes a correlation scheme that has no sidelobe distortion. Various combinations of Golay codes are suitable for use as the complementary codes.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: March 19, 1991
    Assignee: Hewlett-Packard Company
    Inventors: William R. Trutna, Jr., Moshe Nazarathy, Steven A. Newton, Scott H. Foster
  • Adaptive selection of OTDR test parameters and the fusion of data taken from successively shrinking measurement spans
    Patent number: 4812038
    Abstract: A method of dynamically changing the measurement window and operating parameters of the instrument, based on intermediate results, in order to minimize the total time required to make a complete measurement. Also, a method of combining partial results from subwindows into a final result to be displayed that has not been corrupted by variation in system response due to time-varying operating parameters.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: March 14, 1989
    Assignee: Hewlett-Packard Company
    Inventors: Moshe Nazarathy, Steven A. Newton, Scott H. Foster