A low-complexity ITU-compliant dual tone multiple frequency detector

Authors
Deosthali, AA McCaslin, SR Evans, BL
Citation
Aa. Deosthali et al., A low-complexity ITU-compliant dual tone multiple frequency detector, IEEE SIGNAL, 48(3), 2000, pp. 911-917
Citations number
10
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON SIGNAL PROCESSING
ISSN journal
1053587X → ACNP
Volume
48
Issue
3
Year of publication
2000
Pages
911 - 917
Database
ISI
SICI code
1053-587X(200003)48:3<911:ALIDTM>2.0.ZU;2-Y
Abstract
We present the first dual tone multiple frequency (DTMF) signal detector th at meets the International Telecommunications Union (ITU) Q.24 DTMF standar d when implemented on an S-bit microcontroller. Key innovations include the use of adaptive notch filters and sophisticated decision logic. The DTMF d etector is well suited for a multichannel digital signal processor implemen tation.