Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters

  • US 6,205,130 B1
  • Filed: 09/25/1996
  • Issued: 03/20/2001
  • Est. Priority Date: 09/25/1996
  • Status: Expired due to Term
First Claim
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1. A signal reception system for use in a mobile telephone system, said reception system comprising:

  • a receiver that outputs a digitized signal containing received speech parameters representative of speech;

    a decoder, responsive to a bit rate detection unit, that generates processed speech parameters from the received speech parameters, the processed speech parameters being based at least in part on a detected bit rate of the received speech parameters;

    a comparator that compares the processed speech parameters with at least one predetermined range of acceptable speech parameters to identify and discard atypical processed speech parameters outside of said predetermined ranges, the comparing being based at least in part on a rate of change of the processed speech parameters; and

    a speaker that outputs an audio signal associated with processed speech parameters lying within said predetermined ranges.

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