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Apparatus and method for coding signal in a communication system

  • US 8,924,203 B2
  • Filed: 10/26/2012
  • Issued: 12/30/2014
  • Est. Priority Date: 10/28/2011
  • Status: Expired due to Fees
First Claim
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1. An apparatus for coding a signal in a communication system, comprising:

  • a coding unit configured to code voice and audio signals based on a code excited linear prediction (CELP) coding method;

    a residual signal calculation unit configured to calculate residual signals of the voice and audio signals;

    a frequency transform unit configured to transform the residual signal into a signal in a frequency domain;

    an energy calculation unit configured to use frequency coefficients of the residual signals to calculate frequency energy of the residual signals;

    an energy concentration calculation unit configured to calculate energy concentrations of each vector dimension of the residual signals from the frequency energy of the residual signals; and

    a vector dimension determination unit configured to compare the energy concentrations of each vector dimension to determine targeted vector dimensions of the residual signals.

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