Patents by Inventor Kazumasa Tarutani

Kazumasa Tarutani 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).

  • Information recording system and an information recording method
    Patent number: 7636278
    Abstract: An information recording system for recording information on an optical disc using a reference clock signal generated based on a push-pull signal including a wobble frequency component, the system includes an amplitude obtaining unit for obtaining an amplitude value of the push-pull signal, a threshold calculation unit for calculating a displacement threshold of the push-pull signal based on the amplitude value obtained by the amplitude obtaining unit, and a noise reduction unit for generating a corrected push-pull signal by correcting the push-pull signal such that a displacement exceeding the displacement threshold is reduced. The reference clock signal is generated based on the corrected push-pull signal generated by the noise reduction unit.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: December 22, 2009
    Assignee: Panasonic Corporation
    Inventors: Tomoaki Okumura, Tsuyoshi Hiraki, Kouichi Komawaki, Kiyotaka Tanaka, Kazumasa Tarutani
  • INFORMATION RECORDING SYSTEM AND AN INFORMATION RECORDING METHOD
    Publication number: 20090003148
    Abstract: An information recording system for recording information on an optical disc using a reference clock signal generated based on a push-pull signal including a wobble frequency component, the system includes an amplitude obtaining unit for obtaining an amplitude value of the push-pull signal, a threshold calculation unit for calculating a displacement threshold of the push-pull signal based on the amplitude value obtained by the amplitude obtaining unit, and a noise reduction unit for generating a corrected push-pull signal by correcting the push-pull signal such that a displacement exceeding the displacement threshold is reduced. The reference clock signal is generated based on the corrected push-pull signal generated by the noise reduction unit.
    Type: Application
    Filed: May 20, 2008
    Publication date: January 1, 2009
    Inventors: Tomoaki OKUMURA, Tsuyoshi Hiraki, Kouichi Komawaki, Kiyotaka Tanaka, Kazumasa Tarutani