DSP Innovations Inc. (DSPINI) announces new class of proprietary vocoders for wide range of bit rates from 300 bps up to 9600 bps, based on the newest speech coding technology TWELP™, for Digital Radio (HF, DMR, dPMR, etc.) and other markets.

TWELP technology features. The vocoder is based on newest technology of speech coding called "Tri-Wave Excited Linear Prediction" (TWELP) that was developed by experts of DSPINI. The technology provides the best speech quality among competitors today, thanks to:

In spite of the fact, that TWELP technology is based on well-known LPC-method, where output speech is gotten by the synthesizing LPC-filter, it is not a variety or combination of well-known speech coding methods, patented comprehensively during last 20-30 years.
TWELP is not WI-based method (PWI, LCWI, etc.), because LPC-excitation is gotten by not interpolation of the pitch-waveforms.
TWELP is not a sinusoidal/harmonic coding method, including MBE-based coding (IMBE, AMBE, MELP, etc.), because LPC-excitation is not gotten as any mixture of sinusoidal/harmonic or noisy components.
TWELP is not MPE-based or CELP-based method (MPE-CELP, ACELP, etc), because LPC-excitation is not a sequence of pulses on some positions.
TWELP is not a mixture of these methods like MELPe or HVXC because of the above mentioned.
TWELP is unique three-component representation of pitch-synchronous LPC residual that is quantized by unique speech-driven quantizers in conjunction with LPC-parameters. New technology allows to achieve much better speech quality in comparison with any known speech coding methods on the same bit rates (from 600 bps up to 9600 bps and wider).

Please contact to evaluate and purchase:

DSP INNOVATIONS INC.
E-mail: request@dspini.com
Web: http://www.dspini.com
Tel: +44 20 8133 00 44

Tri-Wave Excited Linear Prediction, TWELP, DSPINI and DSP Innovations logo are trademarks of DSP Innovations Inc. AMBE-3000 and AMBE+2 are trademarks of Digital Voice Systems Inc.

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