Patents by Inventor Tokumichi Murakami

Tokumichi Murakami 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).

  • Vector quantizer
    Patent number: 4670851
    Abstract: A vector quantizer for quantizing the vector of image and audio information, the vector quantizer being capable of efficiently encoding a compensation predictive error signal at a reduced bit rate by performing adaptive vector quantization after judging the significance of the compensation predictive error signal in blocks, and capable of movement compensation inter-frame vector encoding in which variable-length encoding of movement vector is facilitated and information production control is achieved easily.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: June 2, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tokumichi Murakami, Kohtaro Asai, Atsushi Itoh
  • Vector quantizer
    Patent number: 4560977
    Abstract: A vector quantizer receives a plurality of input signals in block form and operates to determine an output vector having the least distortion with respect to an input vector by various techniques. A coded output or output vector codetable address is output from a coder of the device for receipt by a decoder which constructs a proper output vector signal.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: December 24, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tokumichi Murakami, Kohtaro Asai
  • Vector quantizer
    Patent number: 4558350
    Abstract: A vector quantizer receives a plurality of input signals in block form and operates to determine an output vector having the least distortion with respect to an input vector by various techniques. A coded output or output vector codetable address is output from a coder of the device for receipt by a decoder which constructs a proper output vector signal.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: December 10, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Tokumichi Murakami