BandwidthExtension ensures everyone benefits from HD Voice-like quality on their mobile phones regardless of the network. BandwidthExtension is deployed worldwide on major handsets and is a feature of NXP Software's LifeVibes VoiceExperience software solution.
NXP Software’s LifeVibes VoiceExperience ensures everyone benefits from HD Voice-like quality on their mobile phones all the time and every time. Of course if the network delivers HD Voice and the person you’re calling also uses an HD Voice capable phone, VoiceExperience will ensure you true wideband conversation. However, for those cases when only a narrowband call can be set up, VoiceExperience includes a state-of-the-art bandwidth extension function that creates a wideband spectrum from a narrowband input. VoiceExperience will automatically detect that the incoming signal from the other calling is narrowband and will extend the narrowband frequency spectrum up to approximately 7 kHz. This ensures HD Voice-like quality, even over completely narrowband networks and independent of the other caller’s phone. This allows operators to deliver a consistent service and ensure consumers enjoy clear, natural speech on every call.
HD Voice or wideband voice extends the frequency range of transmitted speech to deliver a richer, clearer and more natural experience. In a wideband voice call, audio frequencies in the range from 80-7500 Hz are transmitted, more than twice the range of 300 to 3000 Hz of traditional narrowband calls. The frequencies above 3000 Hz add clarity that lets people more easily hear the difference between sounds like ‘s’, ‘f’ and ‘h’.
With the rollout of 4G (LTE) networks operators will initially support HD Voice calls using Circuit Switched Fall Back (CSFB), soon to be followed by VoLTE. Some operators are also upgrading their existing 3G networks to support HD Voice over Circuit Switched (CS). At the same time, consumers are increasingly using OTT VoIP services such as Skype, ChatON, iChat and Hangout, all of which support wideband or super wideband . The result is that consumers start appreciating wideband calling and the extra clarity it offers. LifeVibes VoiceExperience supports wideband calling, for both circuit switched calls and OTT VoIP.