Topic summaryAdaptive Multi-Rate Expand Summary Extracted from the Wikipedia article Adaptive Multi-Rate audio codec. See alsoAdaptive Multi-Rate Wideband (AMR-WB)Extended Adaptive Multi-Rate – Wideband (AMR-WB+)Half RateFull RateEnhanced Full Rate (EFR)Sampling rateIS-6413GPComparison of audio coding formatsRTP audio video profile Wikipedia source