Patents Examined by Bryan E. Weber
  • Enhanced decoder for a radio telephone
    Patent number: 5557639
    Abstract: The invention provides an improved method and apparatus for identifying a bad GSM speech frame. Both the estimated signal-to-noise ratio (ESNR) of the received signal and the pseudo bit error rate (PBER) of a recorded speech signal are used to determine whether or not a speech frame is bad.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: September 17, 1996
    Assignee: Nokia Mobile Phones Ltd.
    Inventors: Ilkka Heikkila, Harri Jokinen, Jukka Ranta