대한전자공학회논문지 (Journal of the Korean Institute of Telematics and Electronics)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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PARCOR 분석 방법에 의한 디지털 DTMF 수신기 구현에 관한 연구

On Implementing the Digital DTMF Receiver Using PARCOR Analysis Method

  • 하판봉 (서울대학교 전자공학과) ;
  • 안수길 (서울대학교 전자공학과)
  • Ha, Pan Bong (Dept. of Elec. Eng., Seoul Nat'l Univ.) ;
  • ANN, Souguil (Dept. of Elec. Eng., Seoul Nat'l Univ.)
  • 발행 : 1987.02.01
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초록

The following methods are proposed for implementing digital dual tone multi-frequency (DTMF) receiver: using infinite impulse response(IIR) digital filters, period-counting algorithm, discrete Fourier transform(DFT), and fast Fourier transform(FFT)[2]. The PARCOR(Partical Correlation) analysis method which has been widly used in the speech signal processing area is applied to the dual tone multi-frequency(DTMF) signal detection. This method is easy to implement digitally and stronger to digit simulation of speech than any other methods proposed up to date. Since sampling rate of 4KHz is used in the DTMF receiver for the detection of input DTMF signal originally sampled at 8KHz, it effects two times higher multiplexing efficiency.

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