Patents by Inventor Takehiro Takamatsu

Takehiro Takamatsu 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: 4127874
    Abstract: A feedback type ghost killer removes a ghost signal component from a detected composite video signal including a wanted video signal and the unwanted ghost signal. The delay time and relative amplitude of the ghost signal to the wanted video signal are detected by a detector with a plurality of tapped outputs. When an output signal appears on one of tapped outputs, the tap position represents the delay time and the amplitude of the output signal indicates the relative amplitude. The composite video signal and the output signals of the detector are supplied to a transversal filter to form a pseudo-ghost signal. The tapped outputs of the detector are used to weight the video signal in the transversal filter. The pseudo-ghost signal and the video signal are subtractively combined to remove the ghost signal from the video signal.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: November 28, 1978
    Assignees: Tokyo Shibaura Electric Co., Ltd., Nippon Hoso Kyokai
    Inventors: Mineo Iwasawa, Tatsuo Sakaue, Hikaru Date, Takehiro Takamatsu