Patents by Inventor Steven R. Spielman

Steven R. Spielman 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 reading and writing a multilevel signal from an optical disc
    Publication number: 20020034138
    Abstract: A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.
    Type: Application
    Filed: July 19, 2001
    Publication date: March 21, 2002
    Inventors: Terrence L. Wong, John L. Fan, David C. Lee, Yi Ling, Yung-Cheng Lo, Steven W. McLaughlin, Laura L. Mcpheters, Richard L. Martin, Judith C. Powelson, Steven R. Spielman, David K. Warland, Jonathan A. Zingman
  • Method and apparatus for reading and writing a multi-level signal from an optical disc
    Patent number: 6275458
    Abstract: A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: August 14, 2001
    Inventors: Terrence L. Wong, David C. Lee, Richard L. Martin, Steven R. Spielman
  • Method and apparatus for providing equalization for the reading of marks on optical data storage media
    Patent number: 5818806
    Abstract: A system and method are disclosed for compensating for intersymbol interference on an optical disc. The method includes measuring an intersymbol linear transfer function. The intersymbol linear transfer function substantially describes a linear portion of the effect of intersymbol interference on an optically detected read signal from an optical disc. The intersymbol linear transfer function is convolved with a write signal to produce a linearly transformed portion of the optically detected read signal. An inverse linear transfer function of the intersymbol linear transfer function is determined. The inverse linear transfer function has the property of canceling the effect of convolving the intersymbol linear transfer function with the write signal. The optically detected read signal is convolved with the inverse linear transfer function.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: October 6, 1998
    Assignee: Calimetrics, Inc.
    Inventors: Terrence L. Wong, Steven R. Spielman