Newest TWELP vocoder operates now also on extremally low 300 bps bit rate, providing acceptable speech quality (higher than 2.0 PESQ), intellegibility of speech and even recognizability of the speaker voice.
The 300 bps vocoder opens the inaccessible earlier new possibilities of telecommunication on long distances and in hard conditions on HF as well as in other fields, where very high compression of speech is needed.

TWELP 300 bps Vocoder is available now as an object library for any DSP, RISC and other platforms.

Newest TWELP vocoder provides more natural and much more intelligible sounding of speech, by setting new standard of speech quality on such low bit rate as 600 bps.
Superiority of TWELP 600 bps over MELPe 600 bps is so high that it exceeds competitor in average on 0.13 PESQ and even on more than 0.2 PESQ for some languages.

TWELP 600 bps Vocoder is available now as an object library for any DSP, RISC and other platforms.

TWELP vocoder provides natural high-quality sounding of speech as well as any non-speech signals even on such low bit rate as 1200 bps. We improved speech quality of TWELP 1200 bps vocoder more, increasing more significant superiority over any competitors. Now, advantage in speech quality over nearest competitor (MELPe) exceeds in average 0.1 PESQ!

The updated TWELP 1200 bps vocoder available now as an object library for any DSP, RISC and other platforms.