Patents by Inventor Hiroshi Ohgaki

Hiroshi Ohgaki 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: 6038095
    Abstract: A signal reproducing apparatus realizes an auto-tracking in reproducing a plurality of recorded signals simultaneously with a simple construction. The signal reproducing apparatus is featured by comprising a plurality of reproducing circuits for reproducing a plurality of recorded signals from a plurality of tracks TQ1, TQ2, TP1, TP2, TA1 and TA2 formed on a recording medium, a plurality of amplitude level detection circuits for detecting amplitudes of at least two of output signals of the reproducing circuits and an operation circuit for generating a tracking control signal from a signal obtained by processing the amplitude level detection signals from the amplitude level detection circuits in a predetermined manner.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: March 14, 2000
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Hiroshi Ohgaki, Yasutaka Sasajima
  • Patent number: 5793557
    Abstract: A signal reproducing apparatus realizes an auto-tracking in reproducing a plurality of recorded signals simultaneously with a simple construction. The signal reproducing apparatus is featured by comprising a plurality of reproducing circuits for reproducing a plurality of recorded signals from a plurality of tracks TQ1, TQ2, TP1, TP2, TA1 and TA2 formed on a recording medium, a plurality of amplitude level detection circuits for detecting amplitudes of at least two of output signals of the reproducing circuits and an operation circuit for generating a tracking control signal from a signal obtained by processing the amplitude level detection signals from the amplitude level detection circuits in a predetermined manner.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: August 11, 1998
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Hiroshi Ohgaki, Yasutaka Sasajima