Guner Arslan, "Dual-Tone Multiple Frequency (DTMF) Detector Implementation"
Abstract: DTMF Signals are used in touch-tone telephones as well as many other areas. Since analog devices are rapidly changing with digital devices, digital DTMF decoders become important. There are many DTMF decoding algorithms, but they cannot comply with the related ITU standards. The algorithm proposed by Matthew Felder and Jimmy Mason is an efficient, digital, ITU complaint, zero buffering DTMF detection algorithm which can be implemented on a TMS320C50 digital signal processor to decode 24 channels using Time-division-multiplexing (TDM).Our aim in this project is to implement a prototype DTMF decoder which comply with the ITU standards and is efficient to use in practical applications. We will simulate the mentioned algorithm on Ptolemy within synchronous data flow (SDF) domain and generate code for TMS320C50 which we will optimize by hand.