Speech quality of the updated TWELP 600 bps vocoder is close to quality of well-known vocoders at the twice higher bit rate 1200 bps, providing a more natural and a more intelligible speech sounding. Superiority of the updated TWELP 600 bps vocoder over MELPe 600 bps vocoder is giant — exceeds the competitor on average on more than 0.2 PESQ and even almost on 0.3 PESQ for some languages.
TWELP 600 bps Vocoder is available right now as an object library for any DSP, RISC and other platforms.