TI DSPS 3rd Party Listings: Vocoder Algorithms: Residual Linear Predictive Voice Coder

Digital Signal Processing Solutions Tools: Vocoder Algorithms

Product Name:	Residual Linear Predictive Voice Coder
Company Name:	D2 Technologies, Inc.
Features & Benefits:	Compresses the voice data to 14.7 and 10.7 kbps Good quality at 14.7 kbps; communication quality at 10.7kpbs Extremely low complexity Robust for different voices, multi-talker and music input Accepts telephone band codec or linear data
TMS320 Devices Supported:	C2xx C5x C54x C6x
Data Rate (kbps):	8kbps
Program Memory (k word):	2.5kword
Data Memory (k word):	710kword
Processor Loading (MIPS):	10.2kword
Target Platform:
Hardware Requirements:	None.
Technical Support/Training Available:	YES 90 day warranty period plus optional design consultation, algorithm development, system integration and training services available.
Overview:	D2's Residual Excited Linear Predictive (RELP) voice coder algorithm module compresses either linear or codec voice data to 14.7 kbps and 10.7 kbps at significantly lower complexity than any voice coders at comparable bit rates and speech quality. The quality of the RELP voice coder is "sub-toll," but meets the requirements of almost all speech applications. The speech is highly intelligible and the quality is very natural, preserving all of the characteristics of the speaker's voice. It is also robust for multi-speaker, music, etc. Designed to the VP Open interface, the RELP voice coder module easily integrates with other VP Open modules, runs in real-time concurrently with other VP Open modules, and handles any number of voice ports assigned to the DSP.
Ideal Performance:	Integrated with other VP Open modules and tested for concurrent real-time processing on multiple voice ports.
Algorithm Verification:	Voice input quality tests Numerical stability tests with tones and extreme values Code error tests for stationary and non-stationary errors Mean Opinion Score (MOS) test according to ITU-T P.80 specification for Absolute Category Rating VP Open interface validation
Availability:	C5x--Available; C2xx, C54x, C6x--Consult D2
Operating System Used:	The host, voice data input and output, memory allocation, and module to module communication interfaces must conform to VP Open specs.
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, telephony system integration.