Quick Note: AT&T Will Get HD Voice Service Later This Year
April 2, 2013 9:56 AM
comment(s) - last by
AT&T also plans to embrace over-the-top services
About a week ago,
that it would finally be brining the iPhone 5 to its wireless network. The company also made plans to bring HD Voice service to its LTE network.
Not to be outdone, AT&T has now announced that it will also add HD Voice service later this year. HD Voice provides users with higher quality (High Definition) audio, and requires support from the calling network and the devices making the call. That means that the network, your device, and the device of the person you're calling all have to support HD Voice capability.
AT&T senior VP Kris Rinne said, "HD Voice is part of our voice over LTE strategy."
Rinne also said that AT&T would be working on
LTE Advanced service
as well. LTE Advanced is designed to reduce interference and bond traffic from multiple frequencies together.
This article is over a month old, voting and posting comments is disabled
RE: HD Voice is What?
4/3/2013 1:33:52 PM
Actually the current state of cell phone audio fidelity is quite poor.
For the Public Switched Telephone Network (PSTN), audio is filtered with a 300 Hz to 3.4 kHz bandwidth and sampled at 8 kHz and then encoded into an 8 bit logarithmic resolution to yield a 64 kbit/sec data stream.
This filtering excludes the fundamental frequency of most adult voices: "The voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz. Thus, the fundamental frequency of most speech falls below the bottom of the "voice frequency" band as defined above. However, enough of the harmonic series will be present for the missing fundamental to create the impression of hearing the fundamental tone." (
Cell phones make things much worse by reducing the G.711 data rate approximately 4 times. They use lossy compression to yield more compressed formats: "GSM has used a variety of voice codecs to squeeze 3.1 kHz audio into between 6.5 and 13 kbit/s"
and CDMA compresses similarly allowing up to 14.4 Kbit/s,
I'm ready for HD cellphone voice quality and I hope it leads to some overdue emphasis on voice quality in the phones themselves.
"Google fired a shot heard 'round the world, and now a second American company has answered the call to defend the rights of the Chinese people." -- Rep. Christopher H. Smith (R-N.J.)
iPhone 5 to Hit T-Mobile April 12 for $99 Plus $20/Month Repayment Charge
March 26, 2013, 11:36 AM
AT&T to Unload LTE Advanced on the U.S. Masses in 2013
November 9, 2011, 10:46 AM
India Could Rock Google With Its Biggest Antitrust Fine Yet -- $5B USD
March 10, 2014, 8:12 PM
Apple Releases iOS 7.1, The First Major Update to Its "Rethought" Mobile OS
March 10, 2014, 1:52 PM
BlackBerry CEO Jokes that iPhone Users are "Wall Huggers"
March 10, 2014, 12:20 PM
Average Mobile Phone Bill in U.S. is Growing Despite Competition
March 10, 2014, 10:25 AM
Aussie Tried to Drop Drugs into a Prison Using an Aerial Drone
March 10, 2014, 9:32 AM
Quick Note: New Generation HTC One (M8) Photos Turn Up on Weibo
March 10, 2014, 9:04 AM
Most Popular Articles
Bitcoin King Pt. II: Mt. Gox's Dictator Karpelès Proves Tragically Flawed
March 7, 2014, 1:12 PM
Bitcoin King: Mt. Gox CEO Mark Karpelès' History of Arrests, Firings
March 5, 2014, 9:05 AM
USAF Moves Forward With Long Range Bomber Program Despite Budget Crunch
March 4, 2014, 9:44 AM
Windows 8.1 Update 1 Leaked Early
March 7, 2014, 9:30 AM
Apple Won't Let UK Sons Unlock Their Deceased Mother's iPad
March 6, 2014, 12:44 PM
Latest Blog Posts
Tesla vs. BMW: Who Has the Safer EV?
Feb 1, 2014, 2:56 PM
Justice Leaks Details of Next HTC One Two Flagship Phone
Dec 5, 2013, 4:04 PM
Global Cyber Espionage Concerns Reveal Growing Cyber Armies
Nov 29, 2013, 11:04 AM
Is The Period Becoming an Expression of Anger?
Nov 26, 2013, 2:02 PM
NSA and Congress -- You Will Never Kill the Constitution, It's an Idea
Nov 10, 2013, 2:00 PM
More Blog Posts
Copyright 2014 DailyTech LLC. -
Terms, Conditions & Privacy Information