Patents by Inventor Kaisuji Igarashi

Kaisuji Igarashi 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).

  • Variable length coding apparatus and method for motion vector
    Patent number: 5298991
    Abstract: A ROM containing a variable length coding table for a 2 picture element range is provided. A motion vector within the range of 2 picture elements is provided to the ROM to produce a VLC code corresponding to the motion vector within the range of 2 picture elements. In a calculation circuit, assuming that the value of a motion vector within the range of 4 picture elements is X, a quotient Y and a remainder Z are obtained by the division of X by 2. The quotient Y is supplied to the ROM and the output of the ROM is added the remainder Z at an addition circuit to obtain a VLC code corresponding to the motion vector lying within the range of 4 picture elements. This is equivalent to variable length coding for a 4 picture element range. By transmitting a flag indicating whether the motion vector range is 2 picture elements or 4 picture elements, the motion vector is correctly reproduced from the VLC code.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: March 29, 1994
    Assignee: Sony Corporation
    Inventors: Yoichi Yagasaki, Jun Yonemitsu, Veltman Mark, Kaisuji Igarashi