Digital Signal Processing Solutions Tools: Telecommunication Algorithms

Product Name: DTMF Digit Detection and Removal
Company Name: D2 Technologies, Inc.
Features & Benefits:
  • Detects the presence of 12- to 16- DTMF digits
  • Detects leading/trailing edge, eliminates bounce
  • Meets or exceeds Bellcore and EIA 464 specs
  • Superior talk-off results: on Mitel/Bellcore
  • Superior talk down performance with D2's NEC
TMS320 Devices Supported: C2xx C5x C54x C6x
Data Rate (kbps): 8
Program Memory (k word): 1.8
Data Memory (k word): 220
Processor Loading (MIPS): 1.5
Target Platform:
Hardware Requirements: None.
Word Size:
Clock Rate:
Group Delays:
Technical Support/Training Available: YES
90 day warranty period plus optional design consultation, algorithm development, system integration and training services available.
Overview: D2's DTMF Digit Detection and Removal algorithm module detects the presence of all 16 DTMF digits that are produced by different telephones on the market under a broad range of network conditions and under international telecommunications specifications. This module includes rapid detection and removal algorithms that eliminate DTMF tones within 12 msec of tone onset. D2's robust DTMF detector is designed for dialing, voice mail, IVR, and voice conferencing applications.
Ideal Performance: Integrated with other VP Open modules and tested for concurrent real-time processing on multiple voice ports.
Algorithm Verification: D2's tone detection tests for tone duration, tone frequency shift and twist, signal to noise, tone levels, D2's talk-off tests, D2's talk-down test of 1600 DTMF digits for 144 different combinations of DTMF level, echo level, canceller settings, D2's DTMF detection tests for performance, in the presence of echo, dial tone, white noise, impulse noise, D2's debounce test for long tones with echo, digit detection for suite of telephone sets, VP Open interface validation.
Availability: C5x, C54x- Available, C2xx, C6x - Consult D2
Operating System Used: VP Open specifications.
Tools Supported By: TI, White Mountain, DSP Research, Go DSP, National Instruments.
Company Information: D2 Technologies, Inc.
104 West Anapamu Street
Santa Barbara CA 93101 USA
Tel: 805-564-3424
Fax: 805-966-2144
e-mail: sales@d2tech.com
www: http://www.d2tech.com
Voice processing solutions provider for computer telephony. Over 20 years of industry experience in algorithms, DSP implementation, real-time systems, and telephony system integration.

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