| 摘要 |
In a digital video effects unit for applying special effects to an image signal, a control device comprises a control knob (1), a mounting arm arrangement (2, 3; 6) for the control knob (1), whereby the control knob (1) can be moved in three dimensions and preferably also rotated, sensors for sensing movement of the control knob (1) in three dimensions and preferably also rotation thereof, and a circuit to derive from the sensors separate output signals, three corresponding to movement of the control knob (1) in three dimensions respectively and preferably one corresponding to rotation of the control knob (1), the output signals being used to control the extent of three or four special effects respectively applied by the digital video effects unit to the image signal. If additionally the control knob (1) is provided with a tracker ball (5), two further output signals can be derived to control the extent of two further special effects. <IMAGE> |
