| 摘要 |
<p>A user input to a system is processed by transmitting one or more signals through air towards a moving input object (12). A first signal, comprising a reflection from the input object (12), is received during a first time period, and is used to determine a characteristic of the movement of the input object (12). A second signal, comprising a further reflection from the input object (12), is received during a second time period, starting after the first time period has ended. The second received signal and the movement characteristic are together used to determine an input, to which the system responds.</p> |
