Patents by Inventor Spyros A. Ramskov

Spyros A. Ramskov 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 reducing periodic interference in audio signals
    Patent number: 5970156
    Abstract: The present invention protects a human operator listening to electronically-generated audible signals from potentially adverse effects of periodic interference contained in the audible signals. The periodic interference is modeled and subtracted from the received audio signal. As a result, the actual periodic interference, being reduced or removed, does not adversely affect the hearing of the operator listening to the received audible signals. Moreover, the human operator still readily discerns the voice received along with the periodic interference despite the fact that the interference has been removed. Thus, while the voice suffers little or no attenuation, the periodic interference is selectively and substantially attenuated.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: October 19, 1999
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Poul Hummelgaard, Spyros A. Ramskov