Patents by Inventor Toshimasa Kumazaki

Toshimasa Kumazaki 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).

  • Video recording by frequency modulation of luminance and multiplexed chroma components
    Patent number: 4491876
    Abstract: In a video recording system the chroma components of a color television signal are applied to a multiplexer where they are interleaved in frequency with each other so that the energy concentration of each chroma component occurs at frequencies interleaved with the frequencies at which the energy concentration of the other chroma component occurs. The interleaved chroma components and the luminance component are supplied respectively to frequency modulators each producing an output having energies distributed over the full range of the passband of the system. The outputs of the modulators are fed to first and second transducers for recording the luminance and chroma components on adjacent tracks of a recording medium.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: January 1, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Hitoshi Aoike, Toyotaka Machida, Toshimasa Kumazaki, Kazuyuki Suenaga
  • Means for compatibly reproducing video discs recorded according to different broadcast standards
    Patent number: 4445143
    Abstract: A rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium by use of a reproducing element. The rotary recording medium is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frequency.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: April 24, 1984
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Toyotaka Machida, Hitoshi Aoike, Toshimasa Kumazaki, Yasuaki Watanabe, Yuichi Ikemura
  • Means for compatibly reproducing video discs recorded according to different broadcast standards
    Patent number: RE32194
    Abstract: A rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium by use of a reproducing element. The rotary recording medium is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frequency.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: June 24, 1986
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Toyotaka Machida, Hitoshi Aoike, Toshimasa Kumazaki, Yasuaki Watanabe, Yuichi Ikemura