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Android Communications Handhelds Upgrades Technology

Fraunhofer IIS Demos Full-HD Voice Over LTE On Android 99

Posted by timothy
from the smell-o-vision-lite dept.
MojoKid writes "Fraunhofer IIS has chosen Mobile World Congress as the place to present the world's first Full-HD Voice mobile phone calls over an LTE network. Verizon Wireless has toyed with VoLTE (Voice over LTE) before, but this particular method enables mobile phone calls to sound as clear as talking to another person in the same room. Full-HD Voice is already established in several VoIP, video telephony and conferencing systems. However, this will mark the first time Fraunhofer's Full-HD Voice codec AAC-ELD has been integrated into a mobile communications system. Currently, the majority of phone calls are limited to the 3.5 kHz range, whereas humans are able to perceive audio signals up to 20 kHz. The Full-HD Voice codec AAC-ELD gives access to the full audible audio spectrum."
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Fraunhofer IIS Demos Full-HD Voice Over LTE On Android

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  • Re:Full HD? (Score:5, Informative)

    by Albanach (527650) on Saturday February 25, 2012 @04:41PM (#39160111) Homepage

    Full HD is a marketing term referring to 1080p-resolution content/screens. Why is it being used here? How does it make any sense whatsoever?

    It makes every bit as much (or as little) sense here as it does when used to describe a television.

  • by fyngyrz (762201) on Saturday February 25, 2012 @05:11PM (#39160249) Homepage Journal

    No. It really doesn't -- I've heard them many times, and the telephone audio sounds pretty much like every other phone, like over-compressed trash. The very minimum for "decent voice audio" requires *everything* between about 300 Hz and 3 KHz to reproduced accurately. That's the old POTS analog phone standard, by the way. And it would be lovely if it were more like 100 Hz to about 6 KHz - tons more nuance available with that kind of range.

  • by jmv (93421) on Saturday February 25, 2012 @05:57PM (#39160481) Homepage

    We actually wanted to compare Opus and AAC-ELD, but there was just no way to actually get an AAC-ELD implementation. The best we were able to do is to get an AAC-LD implementation from Apple. See this demo page [xiph.org] (scroll down) for the comparison we did between AAC-LD and CELT (which is now part of Opus). In the very few modes we had access to, CELT (Opus) was clearly superior to AAC-LD. I've no idea how much better AAC-ELD is.

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