Speech quality of the updated TWELP 300 bps vocoder is enough to provide a voice communication in such hard conditions, where voice transmission was impossible earlier. Digital solution on the vocoder base provides a reliable voice communication in the channel with negative SNR down to -6 dB and worse, where an analogue radio provides only noise in practice.
TWELP 300 bps Vocoder is available right now as an object library for any DSP, RISC and other platforms.
Please watch thus short DEMO-video with TWELP 300 bps Vocoder use:
Please read for the details: