Patents by Inventor Hidetoh Hata

Hidetoh Hata 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).

  • Patent number: 4295154
    Abstract: A digital video and audio file system is provided for use in systems such as a center-to-end video communication system. In the file system, video information, such as a color television video signal, is digitized in such a manner that it is separated into a luminance (Y) signal and a carrier chrominance (C) signal and these separated components are processed by the code differential method and the variable length encoding method. The digital signal thus digitized is recorded in a digital recorder. On the other hand, audio information is digitized by the AD-PCM encoding method and recorded in the same recorder. In encoding the video and the audio information, a part of hardware is used in common for both the signals, thus saving the hardware of the file system.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: October 13, 1981
    Assignees: Nippon Telegraph, Telephone Public Corp., Hitachi, Ltd.
    Inventors: Hidetoh Hata, Katsumi Haji, Kazushige Sako, Yoji Shibata, Masahiko Achiha