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A DTMF TONE DETECTION ALGORITHM WITH LOW COMPUTATION COMPLEXITY

IP.com Disclosure Number: IPCOM000007204D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2002-Mar-05
Document File: 4 page(s) / 162K

Publishing Venue

Motorola

Related People

Authors:
Hugh Wang

Abstract

DTMF tone detection is an essential technique in telephone applications, such as voice mail, auto- matic answering service. To perform DTMF tone detection in real-time, it usually requires dedicated hardware to support, e.g., digital signal processor. The invented algorithm employs only addition and subtraction arithmetic operations, so that it can be implemented in real-time by ordinary micro processor.