Patents by Inventor Hal-Wen Chen

Hal-Wen Chen 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 system for wavelet packet transmission using a best base algorithm
    Patent number: 7436884
    Abstract: A data compression system and method provides a best base searching method to determine the best orthogonal basis function for wavelet-based, data compression. A processing device may receive data signals from a source and wavelet-based data compression may be performed on the received data before transmission (to a receiving component) and/or further digital signal processing (DSP) of the data signals. An encoder portion of the processing device performs the data compression using a predetermined algorithm that determines the best orthogonal basis function (base) of the signal transform (used for representing the data signals) by searching a set of bases including (approximately) all orthogonal bases available to provide the minimum number of coefficients for efficient data compression while maintaining a low error rate in reconstructing the original data signals.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: October 14, 2008
    Assignee: Lockheed Martin Corporation
    Inventors: Hal-Wen Chen, Teresa L. Olson
  • Method and system for wavelet packet transmission using a best base algorithm
    Publication number: 20030185247
    Abstract: A data compression system and method provides a best base searching method to determine the best orthogonal basis function for wavelet-based, data compression. A processing device may receive data signals from a source and wavelet-based data compression may be performed on the received data before transmission (to a receiving component) and/or further digital signal processing (DSP) of the data signals. An encoder portion of the processing device performs the data compression using a predetermined algorithm that determines the best orthogonal basis function (base) of the signal transform (used for representing the data signals) by searching a set of bases including (approximately) all orthogonal bases available to provide the minimum number of coefficients for efficient data compression while maintaining a low error rate in reconstructing the original data signals.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Inventors: Hal-Wen Chen, Teresa L. Olson