 Digital Signal Processing Solutions Tools: Vocoder Algorithms | |
| Product Name: | Multi-Rate VQ Voice Coder |
| Company Name: | D2 Technologies, Inc. |
| Features & Benefits: |
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| TMS320 Devices Supported: | C2xx C5x C54x C6x |
| Data Rate (kbps): | 8kbps |
| Program Memory (k word): | 3.8kword |
| Data Memory (k word): | 407kword |
| Processor Loading (MIPS): | 15MIPS |
| 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 Multi-Rate Vector Quantization (MRVQ) voice coder algorithm module compresses either linear or codec voice data to bit rates of 4.0 kbps to 7.5 kbps at significantly lower complexity than any voice coders at comparable bit rates and speech quality. The quality of the MRVQ 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 MRVQ 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, the MRVQ 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 suite of tests: * Voice input quality tests with different telephone band voice samples, and background noise conditions, music, etc. * Mean Opinion Score test as per ITU - T P.80 specification for Absolute Category Rating * Numerical stability tests with artificial signal such as tones and extreme values * Code error tests for stationary and non-stationary errors * 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. | |
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