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mjgraves
mjgraves
3/26/2014 | 3:46:02 PM
Re: What about VoLTE?
My understanding is that VoLTE and 3G (HSPA/HSPA+) implementations of HDVoice use the AMR-WB familiy of codecs. That means that the baseline performance is 50 Hz - 7 KHz, not unlike what you experience with G.722 on a wireline network today.

The difference between narrowband (G.711/G.729/AMR) and wideband (G.722/AMR-WB) is substantial, definitely worth the effort.

The difference between wideband and "super-wideband" (G.719, SILK, some modes of Opus or AMR-WB+) may not be a dramatic for the purpose of voice.

Some time ago I was asked to give a presentation at Astricon about the implementation of Polycom's Siren codes in Asterisk. That presentation included some recorded comparisons between narrowband, wideband and super-wideband in several languages. They can be found online here:

http://www.mgraves.org/2009/10/asterisk-hdvoice-hearing-the-siren%E2%80%99s-song-part-2/2/

 
KBode
KBode
3/26/2014 | 1:05:07 PM
Re: What about VoLTE?
Yeah that's something I don't understand and perhaps it's something Dan knows. My understanding is that HD voice is sort of VoLTE light. Is that wrong? I know the interoperability is going to be a headache for VoLTE for years still, so is HD Voice just the next best thing until then?
Sarah Thomas
Sarah Thomas
3/26/2014 | 11:44:47 AM
Re: What about VoLTE?
That's a great question. They are different codecs, but my understanding is that all VoLTE is HD, so you'd think they'd be the same. But, if they are, why bother with HD Voice? Why not just work on VoLTE? I guess the fact that 3G will be around a long while longer could be the main reason.
Kruz
Kruz
3/26/2014 | 11:17:32 AM
Re: Competitive advantage?
Benefits from HD voice are numerous:

Studies in Ericsson Consumer Labs showed that 96% of customers were quite satisfied with their calls and 21% had longer calls with HD voice. HD voice can also help introduce enhancements in voice Recognition and Conference Calling offerings for enterprises.

The best case that illustrates the benefits of the introduction of HD voice is Megafon Russia where it was released in q4 2010 and had a direct impact of 37.4% on voice revenues.
Kruz
Kruz
3/26/2014 | 11:03:15 AM
Re: Competitive advantage?
Quality is still a key concern for OTT players and operators have the advantage of security, prioritization and service offerings with HD voice.
KBode
KBode
3/26/2014 | 9:21:23 AM
Re: What about VoLTE?
How discernable is voice quality between this implementation of HD Voice and what VoLTE would offer? Is the human ear even capable of telling the difference after a while? I'd love to sit down with both implementations for a test somehow.
Sarah Thomas
Sarah Thomas
3/25/2014 | 7:47:44 PM
Re: Competitive advantage?
It requires a lot of different network elements and devices to be upgraded to get the full value of it, but when you do, it is a nice advantage. Bad voice quality is still a really big problem. HD Voice fixes that. 

I think VOIP is a threat to voice, just not a big enough one to light a fire.
Sarah Thomas
Sarah Thomas
3/25/2014 | 7:46:43 PM
Re: What about VoLTE?
I'll be there, and I'll ask the question if it doesn't come up! :)
DanJones
DanJones
3/25/2014 | 5:36:24 PM
Re: What about VoLTE?
No clue on VoLTE that I could see, although, they've been rolling it out with the Spark updates.
Kevin Mitchell
Kevin Mitchell
3/25/2014 | 5:09:04 PM
Re: What about VoLTE?
Come to the VoLTE session at CCA Thursday. Sprint is speaking
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