DTMF by Adaptive Digital Technologies, Inc.

Audio and Voice Solutions

Product Description

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)

Features include:

• Designed for multi-channel operation
• Functions are “C” callable
• Low false alarm rate
• Accepts linear PCM 

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

DTMF

Market Segment(s)

• Embedded
• Enterprise
• Mobile
• Mobile Computing

Target Platform(s)

• Android
• Linux
• Other OS
• Windows Embedded CE
• Windows Mobile

ARM Processor(s)

• Cortex-A15
• Cortex-A53
• Cortex-A57
• Cortex-A8
• Cortex-A9
• Cortex-M3
• Cortex-M4
• ARMv7
• ARMv8

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