Patents by Inventor Junzo Okunaka

Junzo Okunaka 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: 6160544
    Abstract: A digital video distribution system is disclosed which includes video terminals connected within a LAN and distributes video from a certain terminal to destination terminals, simultaneously. In this system, each transmitter terminal has an encoder that converts analog video information from a corresponding video source to digitally compressed video information. A hub are connected to the video terminals to distribute digitally compressed video information from a transmitter terminal to multiple destination (receiver) terminals in accordance with a multicast communication protocol. Each of the receiver terminals has an address filter for selecting a packet from among multicast communication packets that has a desired source address as valid video information. The receiver further has a decoder for converting digitally encoded information received as valid to original analog video information with expansion.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: December 12, 2000
    Assignees: Tokyo Broadcasting System, Inc., NTT Electronics Corporation
    Inventors: Toshinari Hayashi, Junzo Okunaka