Orange has launched what it claims to be the biggest advance in voice calls in 20 years. The so-called HD Voice uses noise cancellation technology to improve the clarity of mobile phone sound by filtering out background noise.
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HD Voice runs on the 3G network and uses the wideband adaptive multi-rate (WB-AMR) speech codec. This aims to improve audio quality by using a wider speech bandwidth of 50-7000Hz compared to the current narrowband speech codec of 300-3400Hz. The WB-AMR speech codec delivers significantly enhanced sound quality while utilising the same network resources, Orange said.
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