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Variable frame rate, fixed bit rate vocoding method

  • US 4,852,179 A
  • Filed: 10/05/1987
  • Issued: 07/25/1989
  • Est. Priority Date: 10/05/1987
  • Status: Expired due to Fees
First Claim
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1. A method of operating a vocoder to compress a multiplicity of voice data samples for application to a constant rate channel, said method comprising the steps of:

  • selecting one of a plurality of subframe rates;

    analyzing at lest a portion of the samples to produce a predictive code representative of the analyzed samples;

    quantizing the predictive code into a quantized code having a bit length defined by the selected subframe rate and a rate parameter of the constant rate channel; and

    said steps of selecting, analyzing and quantizing being performed at a bit rate of said constant rate channel.

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