DocumentCode
1303465
Title
A low-complexity ITU-compliant dual tone multiple frequency detector
Author
Deosthali, Amey A. ; McCaslin, Shawn R. ; Evans, Brian L.
Author_Institution
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Volume
48
Issue
3
fYear
2000
fDate
3/1/2000 12:00:00 AM
Firstpage
911
Lastpage
917
Abstract
We present the first dual tone multiple frequency (DTMF) signal detector that meets the International Telecommunications Union (ITU) Q24 DTMF standard when implemented on an K-bit microcontroller. Key innovations include the use of adaptive notch filters and sophisticated decision logic. The DTMF detector is well suited for a multichannel digital signal processor implementation
Keywords
adaptive filters; digital signal processing chips; integrated logic circuits; microcontrollers; notch filters; signal detection; telecommunication standards; 8 bit; DTMF detector; ITU Q24 DTMF standard; International Telecommunications Union; adaptive notch filters; decision logic; dual tone multiple frequency detector; low-complexity ITU-compliant detector; microcontroller; multichannel digital signal processor implementation; Decoding; Detectors; Digital signal processors; Filters; Frequency; Microcontrollers; Random access memory; Signal detection; Telecommunication standards; Telephony;
fLanguage
English
Journal_Title
Signal Processing, IEEE Transactions on
Publisher
ieee
ISSN
1053-587X
Type
jour
DOI
10.1109/78.824692
Filename
824692
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