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Get Higher Voice Quality With AT&T HD Voice - Wireless ...
https://www.att.com/support/article/wireless/KM1046244
With AT&T HD Voice, you enjoy a higher level of voice quality when you make and receive calls. The key is wide-band audio technology and noise cancellation on our network. To get HD Voice, both calling parties must: Be in an HD Voice coverage area Use an HD Voice-capable smartphone Have AT&T PREPAID SM or wireless service set up for HD Voice
AT&T Final Report - Gallaudet University
https://tap.gallaudet.edu/IPTransition/Wideband%20Audio/AT&T%20Final%20Report%20V2.pdf
typical data rates used in mobile cellular networks determined the bit rates, which were selected for each audio codec in consultation with at&t. compared to the narrowband audio codec, the wideband codec extends both the upper and lower limits of the frequency bandwidth by doubling the upper limit from 3400 hz to 7000 hz and extending the lower …
Wideband Audio - The iPhone FAQ
https://www.iphonefaq.org/archives/wideband-audio
Wideband audio was showcased by Apple at the iPhone 5 keynote, however T-Mobile is the only US carrier to support the technology. This is all set to change later this week, when AT&T rolls out HD Voice on its Voice Over LTE (VoLTE) network starting Friday. HD Voice will be enabled on the Samsung Galaxy S 4 mini first, with more devices to follow.
AT&T says it will turn on HD Voice/wideband audio support ...
https://9to5mac.com/2013/04/01/att-says-it-will-turn-on-hd-voicewideband-audio-support-later-this-year/
- Apr. 1st 2013 4:48 pm PT @markgurman At the VentureBeat Mobile Summit today, AT&T Senior Vice President Kris Rinne said that the United States carrier will support HD voice (wideband audio) later...
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