AMBE+2 is the efficient successor to IMBE and
AMBE from DVSI.1 It powers
P25 Phase 2, DMR, and
NXDN, and supports half-rate operation.
AMBE+2 is a more efficient successor used by P25 Phase 2, DMR, and NXDN, supporting half-rate streams.
How it works
Half-rate AMBE+2 is part of how DMR fits two voice
timeslots in one channel and how P25 Phase 2 doubles capacity. At a
given bitrate it generally sounds cleaner than IMBE.
Relevance to SDR
GopherTrunk runs AMBE+2 decoding to produce audio from the most common modern digital
voice systems.
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