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.