dslreports logo
site
spacer

spacer
 
   
spc
story category
T-Mobile Says 'HD Voice' is Live
Users on Select Phones to Notice Call Quality Improvements
by Karl Bode 05:54PM Wednesday Jan 16 2013
As Broadband Reports reader johnnn See Profile first scooped back in December, T-Mobile has quietly been deploying their implementation of HD voice without much fanfare. Unlike upcoming versions of VoLTE, T-Mobile's implementation of HD voice doesn't eat batteries for breakfast, and it's also operating at a significantly lower bit rate (12.65kbps). As a result, calling it "HD" is probably a bit too generous, but it will mean call quality improvements for T-Mobile 4G users.

Click for full size
"T-Mobile has announced that HD Voice is now available on its network nationwide, dramatically improving in-call voice quality for customers with capable smartphones," said the company at CES last week.

"Customers will hear a more true-to-life voice quality that’s fuller and more natural-sounding with significantly reduced background noise from street traffic, wind and crowd noise."

To notice the improved quality, both callers must be using a 4G-enabled phone. It's less of a battery drag because it uses the current circuit-switched UMTS radio interface for the call instead of IP-based transport. Meanwhile, T-Mobile is rumored to be just days away from an LTE launch in Las Vegas, with a follow up deployment in Kansas City. VoLTE, which should offer significantly better quality that T-Mobile's HD Voice offering, has seen delays for most carriers until at least 2014.

view:
topics flat nest 
GraysonPeddi
Grayson Peddie

join:2010-06-28
Tallahassee, FL

Not with Asterisk PBX, right?

Even if I let Asterisk do transcoding for phones that do not support AMR-WB?
brianiscool

join:2000-08-16
Miami, FL
kudos:1

4G

I noticed everywhere I go in Tampa it says 4G now. I have not seen it state 3G yet in my area. Good job T-Mobile just install new Towers.
BlueC

join:2009-11-26
Minneapolis, MN
kudos:1

Nice improvement

I've noticed it when calling other T-mobile subscribers (who also have a 4G phone). It's a very noticeable improvement. Similar to the difference between standard and HD on Polycom IP phones.

fuziwuzi
Not born yesterday
Premium
join:2005-07-01
Atlanta, GA

Re: Nice improvement

According to the press release from T-Mobile, in order to experience HD Voice, both parties must be using HD Voice capable phones on the T-Mobile network. Here is from the press release: "To experience HD Voice, both parties on the call must use capable T-Mobile 4G smartphones such as the HTC One™ S, Nokia Astound and Samsung Galaxy S® III."
--
Teabaggers: Destroying America is Priority #1
en103

join:2011-05-02

HD Voice, or just AMR-Full rate ?

This reminds me of AMR-Full rate, or Enhanced Full Rate.
Older Motorola gear (RAZR and V-series) as well as Nokia phones were able to have 'AMR-Half Rate disabled. This gave GREAT call quality (landline at least).
iansltx

join:2007-02-19
Austin, TX
kudos:2

Re: HD Voice, or just AMR-Full rate ?

This is AMR-WB. T-Mobile has only ever used AMR-FR anyway...in stark contrast to AMR-HR-toting AT&T.

morbo
Complete Your Transaction

join:2002-01-22
00000

Re: HD Voice, or just AMR-Full rate ?

Is that why I can barely understand AT&T cell phone customers?
Telco

join:2008-12-19

Re: HD Voice, or just AMR-Full rate ?

Yes, as they use half rate 5kbps in most areas.
34764170

join:2007-09-06
Etobicoke, ON

LTE

Whether using voice or not via VoLTE is a moot point IMO. LTE devices even using data are eating your batteries for breakfast anyway. Newer generations of LTE chipsets will be much more efficient for battery life and be within the phones carriers ultimately roll out VoLTE with.
Telco

join:2008-12-19

Re: LTE

My LTE ipad seems to last a while.
34764170

join:2007-09-06
Etobicoke, ON

Re: LTE

said by Telco:

My LTE ipad seems to last a while.

Current generations of tablets do not last long enough. Still quite a ways to go.