Patents by Inventor Steven P. Futato

Steven P. Futato 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).

  • Method and apparatus for transmitting digital data and real-time digitalized voice information over a communications channel
    Patent number: 4813040
    Abstract: A system and method transmits digitalized voice and data over a communications channel as a combined data stream while transmitting the digitalized voice in substantially real-time. The system makes use of a redundancy in the coding used to represent at least one amplitude level in the digitalized voice by using one of the redundant codings as a signalling code in a signalling time frame to signal the presence of data and by converting a digitalized voice codeword having this redundant code to its duplicate code. In this manner, during silence periods of the voice communication on the communications channel, data may be inserted. The system and method allow digital data to be transmitted without any limitation on its bit density.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: March 14, 1989
    Inventor: Steven P. Futato