Patents by Inventor Woo J. Song

Woo J. Song 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).

  • Patent number: 5299004
    Abstract: A ghost signal removal apparatus for a broadcasting reception system, includes an analog/digital converter for converting a video signal of a received broadcasting signal into a digital signal. A first filtering circuit is adaptive to a reference signal contained in the digital signal from the analog/digital converter, to remove from the digital signal a ghost signal component appearing at the front of a main video signal. A second filtering circuit is adaptive to a reference signal contained in an output signal from the first filtering circuit, to remove from a fed-back final video signal a ghost signal component appearing at the rear of the main video signal. A subtractor subtracts an output signal from the second filtering circuit from the output signal from the first filtering circuit to obtain the final video signal in which the ghost signal has been removed. A digital/analog converter converts an output signal from the subtractor into an analog signal.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: March 29, 1994
    Assignee: Goldstar Co., Ltd.
    Inventors: Kwang C. Joo, Woo J. Song