Patents by Inventor Yasuhiro Mizuta

Yasuhiro Mizuta 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).

  • Voice gateway and route selection
    Patent number: 6584110
    Abstract: A voice gateway is used to transmit voice signals through the Internet. Upon receiving a connection request, the gateway calculates an end-to-end delay time and selects a proper route according to the calculated delay time to improve the quality of voice transmission. A gateway (10) on the caller side multicasts a connection request to gateways (20) on the receiver side. Each of the receiver gateways returns a response to the caller gateway. According to the response, the caller gateway calculates a compression/decompression allowance and selects a route that employs a compression rule whose compression or decompression time is shorter than the compression/decompression allowance.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: June 24, 2003
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Mizuta, Masami Ohta, Kazunori Umezaki, Tomoyuki Uekado, Yasuo Inoue