Field Guide · technology

Also known as: AMBE

AMBE (Advanced Multi-Band Excitation) is a family of low-bitrate speech vocoders from DVSI, building on the MBE model.1 It is used by D-STAR and EDACS ProVoice, and is the basis for the more efficient AMBE+2.

voice+FECvoice+FECvoice+FECvoice+FEC compact frames, ~20 ms each
AMBE is the multi-band excitation vocoder family behind many digital-voice systems.

How it works

Like other MBE vocoders, AMBE separates voiced (pitched) and unvoiced (noisy) bands and transmits compact spectral parameters, reconstructing speech at the receiver from a few kbps.

Relevance to SDR

GopherTrunk implements AMBE-family decoding in pure Go to render digital voice without proprietary hardware.

Sources

  1. Multi-Band Excitation — Wikipedia, on the MBE vocoder family that includes AMBE. ↩

See also

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