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This is a sub-selection from More like De-Evolution


Guspaz
Guspaz
Premium,MVM
join:2001-11-05
Montreal, QC
kudos:23
reply to elray

Re: More like De-Evolution

Why would it use more spectrum? The amounts of overhead when comparing SIP over 3G or LTE to native UMTS voice calls or IMS over LTE (LTE's eventual native voice format) shouldn't be that different... Heck, IMS over LTE is basically VoIP anyhow...
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elray

join:2000-12-16
Santa Monica, CA
Reviews:
·Time Warner Cable
·EarthLink

1 edit

said by Guspaz:

Why would it use more spectrum? The amounts of overhead when comparing SIP over 3G or LTE to native UMTS voice calls or IMS over LTE (LTE's eventual native voice format) shouldn't be that different... Heck, IMS over LTE is basically VoIP anyhow...

Maybe i misinterpreted the specifications over the years - I'm not an EE,. But doesn't Skype, Sipdroid, G.729 et al, take at least 30kbps, while traditional cellphone vocoders use 8-13kbps?


DataRiker
Premium
join:2002-05-19
00000

said by elray:

Maybe i misinterpreted the specifications over the years - I'm not an EE,. But doesn't Skype, Sipdroid, G.729 et al, take at least 30kbps, while traditional cellphone vocoders use 8-13kbps?

That wouldn't surprise me.

I much prefer VOIP because the sound quality is so much better. Carriers cramming voice over 8kbps makes total sense.

elray

join:2000-12-16
Santa Monica, CA
Reviews:
·Time Warner Cable
·EarthLink

said by DataRiker:

said by elray:

Maybe i misinterpreted the specifications over the years - I'm not an EE,. But doesn't Skype, Sipdroid, G.729 et al, take at least 30kbps, while traditional cellphone vocoders use 8-13kbps?

That wouldn't surprise me.

I much prefer VOIP because the sound quality is so much better. Carriers cramming voice over 8kbps makes total sense.

I avoid cellphone usage for most calls, whenever possible, since most of my contacts speak English as a 3rd language, and poorly - makes anything beyond rudimentary chat improbable.

If you stick with an older CDMA phone, you can still force 13k vocoding, which improves things a bit, at least on VZW network.

I'd welcome an "HD Voice" option for regular cellphone service - if a 16K codec does the trick, I'd pay extra for HD premium minutes. I'm sure existing protocols could handle it, but I suspect Cellco found the billing and PR issues difficult.