Patents by Inventor David D. Koo

David D. Koo 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 for correlation directed echo cancellation and channel equalization for the digital transmission link in vestigial side band amplitude modulation
    Patent number: 6687317
    Abstract: A method for determining and reducing or eliminating mid-range and long-rang echoes in the digital data transmission (in ATSC VSB system) is described. A portion of an ATSC VSB television signal is separated from the rest of the signal, certain values are set to zero and it is correlated with a first vector of data. The result of the correlation represents a channel model as affected by echoes within the channel, and then a second vector of data is added to it to derive correction information useful in positioning moveable filter taps to suppress the most prominent echoes.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: February 3, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: David D. Koo