Patents by Inventor David K. Warland

David K. Warland 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).

  • Secure data storage
    Patent number: 8151121
    Abstract: Securely storing data to an optical disc has been described, including generating write data that includes the data and overhead data that facilitates reading the data from the disc; and configuring the overhead data according to a key.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: April 3, 2012
    Assignee: LSI Corporation
    Inventors: Terrence L. Wong, Ian E. Harvey, David C. Lee, Greg S. Lewis, Steven R. Spielman, Christopher C. Tan, David K. Warland
  • Advanced high density data write strategy
    Patent number: 7489609
    Abstract: A method of writing a mark to an optical disc includes receiving data to be written and generating a control signal for a laser pulse having a melt period that transitions to a growth period wherein the melt period is characterized by a melt power and the growth period is characterized by a growth power.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: February 10, 2009
    Assignee: LSI Logic Corporation
    Inventors: Kunjithapatham Balasubramanian, Hans Henry Hieslmair, Raghuram Narayan, Judith C. Powelson, Jason M. Stinebaugh, David K. Warland, Ting Zhou
  • Advanced high density data write strategy
    Patent number: 7301883
    Abstract: A method of writing a mark to an optical disc includes receiving data to be written and generating a control signal for a laser pulse having a melt period that transitions to a growth period wherein the melt period is characterized by a melt power and the growth period is characterized by a growth power.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: November 27, 2007
    Assignee: LSI Corporation
    Inventors: Kunjithapatham Balasubramanian, Hans Henry Hieslmair, Raghuram Narayan, Judith C. Powelson, Jason M. Stinebaugh, David K. Warland, Ting Zhou
  • Method and apparatus for reading and writing a multilevel signal from an optical disc oscillators
    Patent number: 7136333
    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 2, 2004
    Date of Patent: November 14, 2006
    Assignee: LSI Logic Corporation
    Inventors: Terrence L. Wong, John L. Fan, David C. Lee, Yi Ling, Yung-Cheng Lo, Steven E. McLaughlin, Laura L. McPheters, Richard L. Martin, Judith C. Powelson, Steven R. Spielman, David K. Warland, Jonathan A. Zingman
  • Write compensation for data storage and communication systems
    Patent number: 6982939
    Abstract: Methods and systems for write compensation for optimizing the performance of a data storage or communication channel are disclosed. In one embodiment, a method comprises determining channel sensitivity to modifications in write signal parameters, detecting systematic errors in a read signal recovered from data written with a first set of write parameters, and adjusting the write signal parameters by an amount determined from the channel sensitivity such that the systematic errors are reduced when data are written with the adjusted write parameters.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: January 3, 2006
    Assignee: LSI Logic Corporation
    Inventors: Judith C. Powelson, David K. Warland, Ian E. Harvey, Yung-Cheng Lo, Christine Pepin, Steven R. Spielman, Ting Zhou, Jonathan A. Zingman
  • Write compensation for a multi-level data storage system
    Patent number: 6940790
    Abstract: A system and method are disclosed for compensating during a data writing process for a transformation of input data by an optical disc data storage channel. A write strategy matrix is derived that maps a plurality of input sequences to a plurality of write strategy parameters. The input sequences each include a plurality of input data elements. When an input sequence is received, the write strategy matrix is used to determine in selected write strategy parameter that corresponds to the input sequence.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: September 6, 2005
    Assignee: LSI Logic Corporation
    Inventors: Judith C. Powelson, David K. Warland
  • Method and apparatus for reading and writing a multilevel signal from an optical disc oscillators
    Publication number: 20040156284
    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: February 2, 2004
    Publication date: August 12, 2004
    Inventors: Terrence L. Wong, John L. Fan, David C. Lee, Yi Ling, Yung-Cheng Lo, Steven E. McLaughlin, Laura L. McPheters, Richard L. Martin, Judith C. Powelson, Steven R. Spielman, David K. Warland, Jonathan A. Zingman
  • High density data write strategy
    Patent number: 6775218
    Abstract: A system and method are disclosed for recording information on a phase change medium is disclosed. The method includes irradiating a region of the phase change medium with a first dose of laser energy. A first portion of the region is irradiated with a second dose of laser energy in a manner that causes the first portion of the region irradiated with the second dose of laser energy to be in a different state than a second portion of the region that is not irradiated by the second dose of laser energy.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: August 10, 2004
    Assignee: LSI Logic Corporation
    Inventors: Michael P. O'Neill, Terrence L. Wong, David K. Warland, Kunjithapatham Balasubramanian, Matthew C. Bashaw, Timothy Learmonth, Gregory A. McDermott, Raghuram Narayan, Judith C. Powelson, Ting Zhou
  • Method and apparatus for reading and writing a multilevel signal from an optical disc
    Patent number: 6657933
    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: July 19, 2001
    Date of Patent: December 2, 2003
    Assignee: Calimetrics, Inc.
    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
  • Write compensation for data storage and communication systems
    Publication number: 20020126604
    Abstract: Methods and systems for write compensation for optimizing the performance of a data storage or communication channel are disclosed. In one embodiment, a method comprises determining channel sensitivity to modifications in write signal parameters, detecting systematic errors in a read signal recovered from data written with a first set of write parameters, and adjusting the write signal parameters by an amount determined from the channel sensitivity such that the systematic errors are reduced when data are written with the adjusted write parameters.
    Type: Application
    Filed: November 8, 2001
    Publication date: September 12, 2002
    Inventors: Judith C. Powelson, David K. Warland, Ian E. Harvey, Yung-Cheng Lo, Christine Pepin, Steven R. Spielman, Ting Zhou, Jonathan A. Zingman
  • 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