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Transceiver for selecting a source coder based on signal distortion estimate

  • US 6,499,008 B2
  • Filed: 05/21/1999
  • Issued: 12/24/2002
  • Est. Priority Date: 05/26/1998
  • Status: Expired due to Fees
First Claim
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1. A digital signal transceiver, comprising a transmitting part and a receiving part, the transmitting part receiving at its input an original speech signal and delivering a compressed speech signal on its output, the transceiver comprising:

  • source coder means including a plurality of source coders for compressing said speech signal and delivering the compressed signal of only one source coder of said plurality of source coders at a time and at a given output rate, said compressed signal having a measurable distortion, and said one source coder being a currently operating source coder, calculation means for forming an estimate of the distortion of the compressed signal of the currently operating source coder, check means for comparing said estimate with set values and, dependent upon the result of such comparison, selecting one of the source coders for delivering the compressed signal.

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