HD Voice Annex C Minimum Requirements with GSM/UMTS/LTE – March 2013

This Annex defines the minimum requirements for the usage of the ‘HD Voice’ logo for
GSM/UMTS/LTE network operators and device vendors. HD Voice (High Definition Voice) for mobile terminals and networks comprises of AMR-WB codec and the enhancements to terminals and networks according to the requirements defined in this document AMR-WB is the Codec defined in 3GPP TS 26.171

Further information and technical details of AMR-WB are described in GSMA PRD IR36
“Adaptive Multirate Wide Band”.
This Annex is split into two sections:
• ANNEX C1: Minimum Requirements to be fulfilled by mobile network operators in order
to use the ‘HD voice’ logo for the marketing of the AMR-WB functionality in GSM, UMTS
or/and LTE networks.
• ANNEX C2: Minimum Requirements to be fulfilled by mobile device vendors in order to
use the ‘HD voice’ logo for the devices supporting AMR-WB in GSM, UMTS or/and LTE
mode.

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