Patents by Inventor Taro Tonoduka

Taro Tonoduka 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).

  • Optical line terminal and optical network terminal
    Patent number: 8078929
    Abstract: There are provided an optical line terminal and an optical network terminal, which can process with the same forward error correction code even if an EFC frame size of G-PON descending signals is different between two types of 255 and 120. The optical network terminal includes a photoelectric converter, a PON transceiver, and a physical layer. The PON transceiver includes an error correction code encoder including a shortening compensation parameter table and a shortening compensation calculator for calculating compensated data by referring to the shortening compensation parameter table. Also the optical line terminal includes a photoelectric converter, a PON transceiver, and a physical layer. The optical line terminal includes an error correction code encoder including a shortening compensation parameter table and a shortening compensation calculator for calculating compensated data by referring to the shortening compensation parameter table.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: December 13, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Ohira, Taro Tonoduka
  • Optical line terminal and optical network terminal
    Patent number: 7978972
    Abstract: The optical line terminal has a PON transceiver including an error correction code decoder. The error correction decoder includes: a shortening compensation parameter table; and a syndrome calculator for calculating a syndrome by referring to the shortening compensation parameter table, or an error search part for calculating an error position or an error value by referring to the shortening compensation parameter table. Also the optical network terminal has a PON transceiver including an error correction code decoder. The error code decoder includes: a shortening compensation parameter table; and a syndrome calculator for calculating a syndrome by referring to the shortening compensation parameter table, or an error search part for calculating an error position or an error value by referring to the shortening compensation parameter table.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: July 12, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masaki Ohira, Taro Tonoduka
  • Optical line terminal and optical network terminal
    Publication number: 20080163021
    Abstract: There are provided an optical line terminal and an optical network terminal, which can process with the same forward error correction code even if an EFC frame size of G-PON descending signals is different between two types of 255 and 120. The optical network terminal includes a photoelectric converter, a PON transceiver, and a physical layer. The PON transceiver includes an error correction code encoder including a shortening compensation parameter table and a shortening compensation calculator for calculating compensated data by referring to the shortening compensation parameter table. Also the optical line terminal includes a photoelectric converter, a PON transceiver, and a physical layer. The optical line terminal includes an error correction code encoder including a shortening compensation parameter table and a shortening compensation calculator for calculating compensated data by referring to the shortening compensation parameter table.
    Type: Application
    Filed: June 29, 2007
    Publication date: July 3, 2008
    Inventors: Masaki Ohira, Taro Tonoduka
  • Optical line terminal and optical network terminal
    Publication number: 20080145064
    Abstract: The optical line terminal has a PON transceiver including an error correction code decoder. The error correction decoder includes: a shortening compensation parameter table; and a syndrome calculator for calculating a syndrome by referring to the shortening compensation parameter table, or an error search part for calculating an error position or an error value by referring to the shortening compensation parameter table. Also the optical network terminal has a PON transceiver including an error correction code decoder. The error code decoder includes: a shortening compensation parameter table; and a syndrome calculator for calculating a syndrome by referring to the shortening compensation parameter table, or an error search part for calculating an error position or an error value by referring to the shortening compensation parameter table.
    Type: Application
    Filed: July 6, 2007
    Publication date: June 19, 2008
    Inventors: Masaki Ohira, Taro Tonoduka