A widespread belief in P25 implementation circles is that because P25 Phase 1 uses "IMBE" on the air interface, a decoder must use the IMBE vocoder algorithm (circa 1993, based on Griffin & Lim 1988) ...
The phrase "enhanced vocoder" — not "IMBE vocoder," not "half-rate vocoder" — confirms BABG is about testing something beyond the original IMBE baseline. In the TDMA context, this is the dual-rate ...
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