Patents by Inventor Takatomi Sakakibara

Takatomi Sakakibara 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).

  • White dot out detecting device
    Patent number: 7639579
    Abstract: A white dot out detecting device according to the present invention comprises a recording/reproduction control signal generator for generating a recording/reproduction control signal showing a recording state or a reproducing state of an optical disk, a variable gain amplifier for amplifying and outputting an information signal read from the optical disk and adjusting a gain in the amplification based on the recording/reproduction control signal, an envelope detector for detecting an output envelope of the variable gain amplifier, an integrator for integrating an output of the envelope detector, a slice level setting unit for setting a slice level as a reference for detecting a white dot out based on an output of the integrator, a comparator for detecting the white dot out based on comparison of the output of the envelope detector and the slice level to each other, and a level shifter for temporarily shifting the slice level to a high-level side when a change of the recording/reproduction control signal is de
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: December 29, 2009
    Assignee: Panasonic Corporation
    Inventors: Takatomi Sakakibara, Toshihiro Torii
  • White dot out detecting device
    Publication number: 20060104179
    Abstract: A white dot out detecting device according to the present invention comprises a recording/reproduction control signal generator for generating a recording/reproduction control signal showing a recording state or a reproducing state of an optical disk, a variable gain amplifier for amplifying and outputting an information signal read from the optical disk and adjusting a gain in the amplification based on the recording/reproduction control signal, an envelope detector for detecting an output envelope of the variable gain amplifier, an integrator for integrating an output of the envelope detector, a slice level setting unit for setting a slice level as a reference for detecting a white dot out based on an output of the integrator, a comparator for detecting the white dot out based on comparison of the output of the envelope detector and the slice level to each other, and a level shifter for temporarily shifting the slice level to a high-level side when a change of the recording/reproduction control signal is de
    Type: Application
    Filed: October 26, 2005
    Publication date: May 18, 2006
    Inventors: Takatomi Sakakibara, Toshihiro Torii