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Fraunhofer IIS Demos Full-HD Voice Over LTE On Android

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."

28 of 99 comments (clear)

  1. can you hear me now? by noh8rz2 · · Score: 5, Interesting

    wow this sounds really cool. I think it's so lame that as technology improved in the past 15 years and we went from landlines to cell phones, we took a huge step back in audio quality. Kind of like the step back from CDs to MP3s. I hope this catches on - do both parties need to use it? Perhaps it will be directly implemented in Skype or something.

    1. Re:can you hear me now? by King+InuYasha · · Score: 4, Insightful

      Four parties need to support this for it to work: the caller's handset, the caller's mobile network operator, the recipient's mobile network operator, and the recipient's handset. If all four support the Full HD Voice codec for IMS-Voice (aka VoLTE), then it'll be used. Otherwise, it'll fall back to AMR-WB or AMR-NB.

    2. Re:can you hear me now? by Anonymous Coward · · Score: 5, Interesting

      Skype currently uses the SILK codec, which should give similar quality.

      Skype was also involved with the IETF working group to produce a new codec (called Opus) which is also high quality and will hopefully see more widespread adoption than this AAC-ELD codec.

      Would be interested in seeing some comparisons between Opus and AAC-ELD, especially since Opus can do both voice and music due to its hybrid nature.

    3. Re:can you hear me now? by masternerdguy · · Score: 2, Insightful

      What's especially funny about mp3 is how all the tools who listen to it don't know or care that there are superior oss codecs. I'm surprised flac or ogg haven't usurbed mp3 tbh.

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    4. Re:can you hear me now? by mspohr · · Score: 2

      I can tell the difference between the audio on my cell phone calls and my Skype calls. The Skype calls have much better quality.
      I can use Skype over 3G from the South Pacific to the US and the quality is fantastic... better than a local call. The only problem is a bit of lag due to the distance.

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    5. Re:can you hear me now? by dgatwood · · Score: 4, Interesting

      Saying that FLAC is better than MP3 is like saying that an M1A1 is better than a smart car. If you care only about getting something from point A to point B undamaged, then yes, it is. If you care at all about efficiency, not so much.

      As for Ogg Vorbis, I suspect the patent FUD spread by Fraunhofer pretty much sealed its fate as far as commercial vendor adoption was concerned, which in turn has limited its uptake by the general public.

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    6. Re:can you hear me now? by jmv · · Score: 4, Informative

      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 (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.

    7. Re:can you hear me now? by Skarecrow77 · · Score: 2

      mp4 is a container. not an audio codec.

      did you mean AAC?
      which AAC, quicktime, faac, nero?

      doesn't really matter. aotuv tuned vorbis beats or at worst ties any flavor of aac down to and including 96kbps.
      http://wiki.hydrogenaudio.org/index.php?title=Listening_Tests#Multiformat_Tests

      doesn't truly matter anyway. aside from "killer samples", all modern codecs, including MP3, reach perceptual transparency by about 192kbps or so.

    8. Re:can you hear me now? by Daniel+Phillips · · Score: 2

      As for Ogg Vorbis, I suspect the patent FUD spread by Fraunhofer pretty much sealed its fate as far as commercial vendor adoption was concerned, which in turn has limited its uptake by the general public.

      The fate of ogg is far from sealed. It has grabbed a dominant position in video game assets and is the tech of choice in many other contexts. Wisely, Frauenhofer has not made a peep about its troll patent portfolio. Anybody who uses ogg instead of mp3 today when they do not have to is an idiot, but no denying there is a good supply of such idiots.

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    9. Re:can you hear me now? by jmv · · Score: 2

      The only real comparison we've made with Vorbis and AAC was a 64 kb/s test comparing Opus to Vorbis and HE-AAC (v1). See the results and the analysis. At higher rate, we definitely reach a point where Opus is transparent for everything, but the exact rate depends on the content and the listener.

      As for Microsoft, they've actually updated their covenant to something which is nicer than what Skype originally had and (IMO but IANAL) totally acceptable.

    10. Re:can you hear me now? by MartinSchou · · Score: 4, Funny

      Saying that FLAC is better than MP3 is like saying that an M1A1 is better than a smart car. If you care only about getting something from point A to point B undamaged, then yes, it is.

      Okay, I get your point, but you picked a rather unfortunate comparison.

      1) Getting a parking space? Never an issue with the M1A1, even when all the lots are filled ...
      2) Traffic jams? Shouldn't be a problem with the M1A1 either ...
      3) Tail gaters? .50 cal machine gun and 120 mm cannon!
      4) People cutting you off in traffic? See 3.
      5) Getting T-boned in an intersection? Yeah, you might get banged about a bit, but I suspect the M1A1 will do just fine unless it's an 18-wheeler or bigger.
      6) Are the local roads washed out by inclement weather? The M1A1 will still get you there. (I even suspect there'd be no real danger in driving straight through tornadoes and hurricanes in an M1A1).
      7) Is there a foot of snow covering your local roads? Debris from the recent hurricane or tornado blocking the roads? The M1A1 will still get you there.

      It's not difficult to think up even plausible ways that an M1A1 is better for your commute than a SmartCar.

      But your point still stands.

    11. Re:can you hear me now? by Daniel+Phillips · · Score: 3, Funny

      Anybody who uses [mp3] instead of [ogg] today when they do not have to is an idiot, but no denying there is a good supply of such idiots.

      I'm guessing by your context that you meant that the other way round?

      Correct of couse. I could add "and anyboldy who posts the exact opposite of what they mean is an idiot".

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    12. Re:can you hear me now? by Anonymous Coward · · Score: 2, Funny

      And mp5 is for shooting.

  2. Re:Full HD? by Albanach · · Score: 4, Informative

    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.

  3. What good is HD-voice quality... by SeaFox · · Score: 4, Insightful

    ...when the phones have shit sound components.

    Handset makers have been so focused on stuffing their handsets with cameras, MP3 playback, video playback, picture messaging and other dumb things in a features race that they only phone-in (pun intended) the basic voice calling capabilities now.

    1. Re:What good is HD-voice quality... by fluffy99 · · Score: 3, Insightful

      The crappy speakers and mics in most phones probably has as much effect as the processing and compression. It is true though that the cellphone frequency range does cut off too much of the lower frequencies. A codec that goes to 20k is pointless when there is no speech frequencies that high, and most people can't hear it anyway. The focus should be better lower frequency coverage, improve the dynamic range, and filter background noise.

      It's kind like pushing HD radio, when most people listen to their radios in their noisy cars with stock speakers and can't tell the difference.

    2. Re:What good is HD-voice quality... by rasmusbr · · Score: 2

      I'm frequently amazed at the quality of microphones in newer phones. Call quality is usually limited by the codec, not the mic.

      There are videos on Youtube taken by cellphones of rock concerts where the audio is both clear and doesn't clip. There are videos on Youtube taken by cellphones of speeches where the person filming is far back in the audience and there's no amplification, yet the recording is good enough that you can listen to the speech.

      If you had told me ten years ago that it would be possible to do that with a mainstream consumer electronic device weighing in at 100 grams today I would have been very skeptical.

  4. It'd make me finally buy a smart cellphone by fyngyrz · · Score: 2

    It's worth it, though -- horrible audio is why I don't own an iPhone, just an iPad and an old dumbphone. Cellphone audio quality is simply horrible; whoever decided that the utter crap they call audio was "good enough" deserves to be taken out and shot. And considering how good audio compression is these days, there's very little excuse for it. Yeah, there are several points that have to support it, but we've seen lots of things added to the phone network, decent audio quality could easily have been one of them at just about any time.

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    1. Re:It'd make me finally buy a smart cellphone by fyngyrz · · Score: 4, Informative

      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.

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    2. Re:It'd make me finally buy a smart cellphone by Amarantine · · Score: 2

      Keep in mind, part of the reason for the white paper is that they want to sell their newest 79xx series VOIP phones.

      True, but those phones have been around for at least 4 years now. In fact, the whole 79xx-range is being phased out, in favour of the 69xx and 99xx series. G.722 does sound very crispy though. Made a test call back then on two phones supporting it, and I remember being amazed at how clear the sound was. I did not expect it could and would make such a difference. In speakermode, it was almost as if the person was sitting next to me.

  5. Full HD 20-20 means... by ElitistWhiner · · Score: 2

    ...distribution channel for Full 20Hz - 20kHz music source. Now go figure. Do the maths

  6. Awesome! by digsbo · · Score: 4, Funny

    I can make phone calls with my phone now!

  7. humans are able to perceive audio up to 20 kHz... by John+Hasler · · Score: 4, Interesting

    Only those who have not had high-intensity hoot and thump music piped into their ear canals for the last ten years. Most twentysomethings won't be able distinguish HD audio from a 1940s telephone. They'll buy it anyway, though.

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  8. Re:"Full HD" - right by SeaFox · · Score: 4, Insightful

    It's actually a variant of H.264/MPEG-4 AVC, which is the codec on Blu-Ray audio. But not at a high bit rate, as on Blu-Ray discs. It's AAC/ELD v2, at 24Kb/s.

    It's already in IOS Facetime, anyway.

    This post doesn't make any sense.

    1. H.264 is a video codec, it has nothing to do with the audio on a bluray disc. Blu-ray discs use a wide variety of sound formats, from 24-bit PCM Mono, all the way to 7.1 Lossless codecs.
    2. You don't have to use H.264 to be "Full HD". "Full HD" is nothing more than a marketing term to start with, but it only refers to 1080p video. Early Blurays used MPEG2 for video codec and still did 1080p resolution.
    3. Facetime doesn't use AAC/ELD, but only AAC/LD, which doesn't go as low in frequency.
  9. Re:humans are able to perceive audio up to 20 kHz. by Vegemeister · · Score: 2

    There are very few people left alive who listened to something that wasn't 'high-intensity hoot and thump music' in their youth. Sorry about your lawn.

  10. Re:Voice communication is still very ineffective. by Anonymous Coward · · Score: 2, Insightful

    "Once your communication goes beyond one or two sentences, it [voice] quickly becomes inferior to written- or text-based communication of some form."

    Any time I get an IM from a coworker and the exchange goes beyond a short response or two, I invariably type "Call me." Voice communication - which is effortless (unlike typing), instantaneous (unlike typing), and nuanced (again, unlike typing) - is dramatically more efficient for discussing anything more complex than "Meet me at the bar at 6."

  11. Re:humans are able to perceive audio up to 20 kHz. by realityimpaired · · Score: 2

    Never heard somebody using radio procedure over a cell conversation, eh?

    I-SPELL INDIA TANGO APOSTROPHE SIERRA SPACE DELTA OSCAR ALPHA BRAVO LIMA ECHO.

    I use it instinctively whenever I'm doing something like that over the phone, even if it's a good connection, and I ask the person on the other end to read it back to me phonetically as well. And when it's a bad connection, I'll use "words twice". It just makes sense when it's information like that, and I suspect even with "hd audio", you'll still need to do it, because people can still screw up S and F, D and T, and others like that. Surprisingly, even when you're speaking with somebody who doesn't have radio/military experience, when you start using radio indicators like "Figures", "I Spell", "Say Again", and the phonetic alphabet, people don't seem to have a hard time understanding it.

    And yes, a text or an e-mail is better... in theory. On my cell phone, the keyboard is a pain in the backside, and it's very easy to make a typo. And that's one of the rare phones that actually has a keyboard... it's worse with the touchscreen. If I'm in the field, it is usually faster to simply spell it phonetically over the phone, rather than trying to write a text or an e-mail on my phone. And gods help anybody who's stuck using T-9.

  12. Re:humans are able to perceive audio up to 20 kHz. by Vegemeister · · Score: 3, Funny

    Surely, you would be better served by stock in a hearing aid company.

    Note to self:
    Sell stock in speech recognition company