5G • Services
AMR-WB
Adaptive Multi-Rate Wideband Codec
Standard wideband speech codec operating across 9 bitrates (6.60 to 23.85 kbps) with 7 kHz audio bandwidth.
Technical Explanation
AMR-WB (ITU-T G.722.2) is the universal HD Voice codec deployed in cellular networks globally. Operating with a 16 kHz sampling rate and 7 kHz acoustic bandwidth, it provides a massive improvement in speech clarity over legacy 3.4 kHz narrowband codecs, serving as the universal baseline for VoNR.
Key Functions
- Standard HD Voice codec operating with 7 kHz acoustic bandwidth
- Supports 9 discrete operating bitrates from 6.60 kbps up to 23.85 kbps
- Universally supported across all global commercial 4G and 5G smartphones
Specifications
3GPP TS 26.171, ITU-T G.722.2
Interfaces
Uu
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