Patents by Inventor Masakazu Kamichika

Masakazu Kamichika 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).

  • Adaptive delta codec which varies a delta signal in accordance with a characteristic of an input analog signal
    Patent number: 4532494
    Abstract: A delta value generating circuit in an adaptive delta codec, comprising a delta value register, a control terminal for indicating increase or decrease of the delta value and adder/subtractor for increasing or decreasing the delta value in the register in accordance with a level at the control terminal. The adder/subtractor has first input terminals connected to the output terminals of the register and second input terminals connected to a predetermined number of upper bits of the output terminals of the register and the control terminal in accordance with a level at the control terminal.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: July 30, 1985
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Itsuo Sasaki, Hiroaki Suzuki, Masakazu Kamichika