Power of silence

时间:2019-03-07 06:12:05166网络整理admin

By Barry Fox When people talk, they only make sound for 40 per cent of the time—a fact that has led IBM to an idea for making batteries last longer when digital cellphones communicate (GB 2 335 827). Switching the transmitter off during silences saves power, but the lost synchronisation between the receiver and transmitter means the message gets garbled. So IBM places the voice data in packages, which are transmitted at constant speed. The transmitter switches into a low power mode when an empty package arrives,