High Definition Voice (HD voice) is high definition voice quality for telephony. It extends the frequency range of audio signals transmitted resulting in higher quality speech.
The range of human hearing covers frequencies from 20 Hz to 20,000 Hz, while the human voice spans a frequency range of at least 50 Hz to 12,000 Hz . Traditional narrowband telephone calls limit audio frequencies. HD voice uses a broader range of frequencies to better match the range of pitch and tone in human speech and provides high fidelity audio increasing the quality of voice calls and music streaming for example, while reducing background noise.
Voice over Long Term Evolution (VoLTE) is recognised as the industry-agreed progression of voice services. VoLTE using HD voice, enables far richer, multi-media voice services. VoLTE helps operators build out next generation service architectures based on an IMS core to provide carrier-grade services over mobile broadband.
The next progression of HD voice quality for IP-based communications networks is foreseen, evolved HD voice for LTE networks. 3GPP has standardized the next generation telecom-grade voice codec for VoLTE. This new voice codec is called Enhanced Voice Service (EVS) and will be commercialized in the coming years.
Voice over WiFi (VoWiFi) can help solve the challenge of indoor access for mobile users and can also reduce roaming costs because calls may be treated as being local. VoWiFi complements VoLTE because both are IMS-based services that can offer mobility and added-value services.
A single architecture and infrastructure means that VoWiFi call routing, service subscription, billing and service execution can be equivalent to VoLTE.
GSA publishes an Information Paper providing details of network commitments, deployments, service launches and new user devices. Search for the GSA Information Paper “HD voice based on the AMR Wideband technology”.Join GSA Visit The LinkedIn Group