HD VoIP

It does happen quite often. You have an important conference call at work or with a customer and you have to take it from your mobile phone in a car, at the airport or just walking down a noisy street. People cannot understand you well and vice-versa. It is hard for you to clearly make that important point and you have your phone muted most of the time to prevent disturbing the call for the others. Now, what if people could clearly hear you, without background noise, just as if you were sitting right there next to them?

The High Definition (HD) VoIP program is focused on research into technologies that improve the performance of 3G voice services. The HD VoIP team has been working to enable end-to-end high fidelity voice communication for both wireless and enterprise applications by unifying technologies such as VoIP, wideband vocoders, advanced noise cancelling and wireless interoperability with the enterprise domain.

Intrinsic bandwidth limitations in the PSTN and earlier generation of wireless networks have imposed a limit on the quality of voice communications. However, high capacity 3G networks enable efficient delivery of end-to-end HD VoIP using high quality wideband codecs such as EVRC-WB or AMR-WB. Moreover, advanced techniques such as Qualcomm’s dual-microphone noise cancellation technology further improve the end-to-end solution.

Given the large and growing 3G base, the HD VoIP program is developing the techniques needed to greatly improve voice quality and help operators provide service differentiation and create new revenue generating opportunities. The HD VoIP team is now showing end-to-end HD VoIP calls between mobile and fixed devices. This demonstration uses EV-DO Rev A, EVRC-WB codec, and advanced dual-mic noise cancellation for the mobile and commercially available wideband VoIP desk phones on the fixed side.

Podcast

HD Voice 16:31 April 2009 Download mp3 (15.9MB)


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