Patents by Inventor Ryuichi Toki

Ryuichi Toki 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: 4453247
    Abstract: In a speech packet switching system, an input speech signal to a speech packet transmitting station is converted to a digital signal to form speech data blocks, which are discriminated to talkspurt blocks and silence blocks, and only the talkspurt speech blocks are packetized and transmitted through a speech packet switching network. In a receiving station, a series of speech packets received in one talkspurt period are temporarily stored in a variance absorbing buffer to compensate for a variance of transmission delay times resulting from the transmission through said speech packet switching network to add variance absorbing times to the speech packets depending on the transmission delay times of the respective speech packets. Then the speech packets are sequentially reproduced.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: June 5, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Michio Suzuki, Matsuaki Terada, Takao Kato, Ryuichi Toki