Comparative analysis of methods used in the design of DTMF tone detectors

Author

Selman, Suvad ; Paramesran, Raveendran

Author_Institution

Univ. of Malaya, Kuala Lumpur

fYear

2007

fDate

14-17 May 2007

Firstpage

335

Lastpage

339

Abstract

Dual-Tone Multi-Frequency (DTMF) Signals are used in touch-tone telephones as well as many other areas. Since analog devices are rapidly being replaced with digital devices, digital DTMF decoders with superior quality have become the ideal replacement. In this paper a comparative analysis on the four DTMF detector designs are studied. They are namely, filter design approach, Discrete Fourier Transform(DFT), Goertzel Algorithm and Sub-Band Non-Uniform DFT (SB-NDFT). The algorithms are developed in the MatLab environment and the implementation is done on a Digital Signal Processor, TMS320 C6713.The figure of merit and computational complexity are used as a performance measure and in both cases the SB-NDFT is found to be the best.

Keywords

decoding; discrete Fourier transforms; signal detection; telephone sets; DTMF tone detectors; Goertzel algorithm; discrete Fourier transform; dual-tone multi frequency signals; filter design approach; sub-band non-uniform DFT algorithm; touch-tone telephones; Algorithm design and analysis; Band pass filters; Decoding; Digital signal processors; Discrete Fourier transforms; Filtering; Finite impulse response filter; Frequency; Signal processing algorithms; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications and Malaysia International Conference on Communications, 2007. ICT-MICC 2007. IEEE International Conference on

Conference_Location

Penang

Print_ISBN

978-1-4244-1094-1

Electronic_ISBN

978-1-4244-1094-1

Type

conf

DOI

10.1109/ICTMICC.2007.4448657

Filename

4448657