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The main codecs supported for 5G voice (VoNR) and video (ViNR) services according to 3GPP standards:
- Enhanced Voice Services (EVS) - This is the preferred codec for high-quality 5G voice. It supports various bandwidths from narrowband to fullband and provides enhanced audio quality compared to older codecs.
- AMR-NB and AMR-WB - These legacy narrowband and wideband codecs are supported for backward compatibility with 3G/4G networks and devices that don’t support EVS.
- H.264 video codec - Specifically the H.264 baseline profile is required for video over NR (ViNR) according to 3GPP specifications.
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More advanced profiles like H.264 high efficiency video coding (HEVC) are also supported by some devices.
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In addition, the 3GPP recommends that devices support the following video codecs for maximum interoperability according to GSMA requirements:
- H.264 advanced video coding (AVC) or constrained high profile (CHP)
- H.265 high efficiency video coding (HEVC) main profile
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