Orange UK today said it would be one of the first carriers to upgrade its call quality with plans to launch "high definition" calls. The HD Voice service will use a new speech transmission format known as Wideband Adaptive Multi-Rate (WB-AMR) that allocates multiple times more bandwidth to a call than normal 3G voice without increasing the amount of data used. Orange expects calls to sound as good as if the other caller was "actually in the same room" if both are using the same technology.
