Editorial: Will G.722 be the HD voice favorite for WiMAX?

Reviews of Sprint’s HTC EVO phone are good – with the exception of short battery life when WiMAX is turned on.  CPU-intensive codecs are only likely to compound the problem, leaving G.722 as an “oldie, but goody.”

Good news for the Sprint 4G EVO is that it’s fast. Really really fast. Like, up to 3-10 times faster than 3G; over 10 Mbps on the downlink. Not only broadband fast, but with faster response time on apps due to the Qualcomm Snapdragon processor.

But speed is nothing without the juice to keep the device alive and that’s where a slew of tech gurus have found EVO’s Achilles’ heel.  According to USA Today’s Edward C. Baig, Sprint “concedes” that searching for and using 4G is a drain and one would want to turn off 4G when you aren’t in 4G territory – an interesting paradox because 4G isn’t in all cities yet and coverage in WiMAX cities can be problematic.

At CES in January, D2 Technologies (www.d2tech.com) Doug Makishima said G.722 was a much nicer HD voice codec option than AMR-WB when it came to battery life. AMR-WB -– and presumably Skype’s SILK codec – consume more power because of all the data compression they do to neck-down into less bandwidth.  G.722 is pretty light-weight on its CPU usage but uses 64 Kbps for a voice call – something would seem to be acceptable when it comes to WiMAX or 3G usage.

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