 Digital Signal Processing Solutions Tools: Vocoder Algorithms | |
| Product Name: | High Quality ADPCM Voice Coder |
| Company Name: | D2 Technologies, Inc. |
| Features & Benefits: |
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| TMS320 Devices Supported: | C2xx C5x C54x C8x |
| Data Rate (kbps): | 24 |
| Program Memory (k word): | 1 |
| Data Memory (k word): | 25 |
| Processor Loading (MIPS): | 2.4 |
| Target Platform: | |
| Hardware Requirements: | The VP Open architecture places minimal constraints on the underlying hardware and can accommodate a wide variety of systems. No specific TMS320 peripheral devices are required. |
| Technical Support/Training Available: | YES 90 day warranty period plus optional design consultation, algorithm development, system integration and training services available. |
| Overview: | D2's High Quality (HQ) ADPCM voice coder algorithm module compresses either linear or codec voice data to 32 kbps or 24 kbps at significantly lower complexity than ITU-T G.726 coders. The quality of the HQ ADPCM coder is equivalent or superior to the G.726 standard at those rates. Designed to the VP Open interface, the HQ ADPCM 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. Like all of D2's algorithm modules, HQ ADPCM voice coder consists of robust software that is rigorously tested. |
| Ideal Performance: | Integrated with other VP Open modules and tested for concurrent real-time processing on multiple voice ports. |
| Algorithm Verification: | Validated through a suite of tests: * Voice input tests with different telephone band voice samples and background noise conditions * Mean Opinion Score (MOS) test per ITU-T P.80 specification for Absolute Category Rating * Non-voice input tests with artificial signal such as tones and extreme values used to test numerical stability * Code error tests for stationary and non-stationary errors * Integrated with and tested concurrently with other VP Open modules |
| Availability: | Currently available for the TMS320C5x along with demonstration package for TI EVM50 board. Consult D2 for other products availability. |
| 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: | |
| 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. | |
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