ARM’s highest performing processor, extending the capabilities of mobile and enterprise computing. Read More...
The complex DTMF tone detect algorithm determines the single generated digit by extracting the two frequencies from the input signal, allowing for tolerances such as frequency offset and distortion such as additive noise, and then checking them to see if together they qualify as one of the digits. A DTMF detector rejects any tone frequency that is not the sum of one high and one low tone. This prevents speech and noise signals from being interpreted as DTMF tones.
Sampling Rate: 8 kHz
Frame Size: Programmable
SNR: 24 dB
Minimum Duration: 29 msec.
False Alarm Rate: 8 (30 minute Mitel Test Tape)
Supported by ARM processor-based devices
Adaptive Digital's tone detector has been deployed since 1995, and hosted on numerous platforms.
Specifications available on our website at: http://www.adaptivedigital.com/product/arm/dtmf-detect-software-arm.htm