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
fDate :
3/1/2000 12:00:00 AM
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;
Journal_Title :
Signal Processing, IEEE Transactions on
