Patents by Inventor Toshihisa Nishijima

Toshihisa Nishijima 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).

  • Coding and decoding method
    Patent number: 4897839
    Abstract: Disclosed is a coding and decoding method, in which a certain promised nonzero symbol is appended for coding and decoding, thereby disallowing the presence of a codeword with all-"0" data after coding. The method enables the detection of a fault in an external circuitry by checking the occurrence of an all-"0" received word attributable to the external circuitry.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: January 30, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsuhiro Yamagishi, Hideo Yoshida, Tohru Inoue, Toshihisa Nishijima, Yoshiaki Oda
  • Error correction encoder/decoder
    Patent number: 4841300
    Abstract: A separate operational section for determining the degree of a polynomial is provided to increase the process speed in determining both error locator and evaluator polynomials. When a received word is decoded based on the error location found, the received word is stored in a memory and corrected and output through the designation of the address. The formula ##EQU1## is derived from the error locator equation ##EQU2## and the value of which satisfies .sigma.(.alpha.)=0 is determined to increase the process speed. The decoder and the encoder share part of the hardware to make the system compact.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: June 20, 1989
    Assignee: Mitsubishi Denki K.K.
    Inventors: Hideo Yoshida, Tohru Inoue, Atsuhiro Yamagishi, Yoshiaki Oda, Minoru Ozaki, Toshihisa Nishijima