Patents by Inventor Tadao Nuka

Tadao Nuka 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).

  • Apparatus for measuring S/N ratio of composite video signal
    Patent number: 6356302
    Abstract: An S/N ratio measuring method of a video signal which is suitable for the formation of an IC and can precisely detect a fluctuation of an S/N ratio of a video signal at high response speed while suppressing the total cost and a system based on this method. In operation, a composite video signal is received, a noise density in a predetermined period of the composite video signal is detected, and an S/N ratio of a video signal included in the composite video signal is recognized basis on the detected noise density. The S/N ratio measuring system has a demodulator for demodulating the composite video signal from the reception signal and a counter for counting noises which are generated in a predetermined period of time of the composite video signal and recognizes the S/N ratio of the video signal included in the composite video signal based on a count value obtained.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: March 12, 2002
    Assignee: Pioneer Electronic Corporation
    Inventors: Yasuo Kawakami, Koji Shibata, Yutaka Miyahara, Tadao Nuka
  • Car stereo having a removable panel
    Patent number: 5537673
    Abstract: A removable panel has a plurality of operation buttons for operating a car stereo. A cellular telephone system operated by the operation buttons is provided in the panel. A controller is provided in the panel for rendering the car stereo inoperative in response to an instruction received through the cellular telephone system.
    Type: Grant
    Filed: June 15, 1995
    Date of Patent: July 16, 1996
    Assignee: Pioneer Electronic Corporation
    Inventors: Akira Nagashima, Tadao Nuka