How HD Voice Works to Make Your Calls Sound Drastically Better

How exactly does HD Voice work? And is it just marketing hype, or will our smartphones finally excel at actually making calls?

Source: http://www.wired.com/gadgetlab/2013/04/how-hd-voice-works-to-make-your-calls-clearer/

QUALCOMM QUANTA COMPUTER RESEARCH IN MOTION ROGERS COMMUNICATIONS SAIC