TWELP vocoder provides a natural high-quality sounding of speech as well as any non-speech signals even at such a low bit rate as 1200 bps. We improved the speech quality of TWELP 1200 bps vocoder more, significantly increasing a superiority over any competitors. Now, an advantage in speech quality over the nearest competitor (MELPe) exceeds on average 0.1 PESQ!
The updated TWELP 1200 bps vocoder available now as an object library for any DSP, RISC and other platforms.