| 摘要 |
A user interface for a device such as a presentation player (110) includes a sensor (118) capable of sensing printed material. Commands for the device can thus be printed and sensed using the sensor (118), and the device does not require user interface hardware that is difficult to miniaturize. For a presentation player (110), the printed material (120) can be a companion book or other printed material containing images or other printed sections that correspond to specific recorded audio or video sections. Sensing a symbol in or the content of a printed section indicates a data section that the player (110) can select and play while the user views the corresponding printed section. The printed material (120) can further include control signals to which the user applies the sensor (118) to show authorization to use the system or to change the volume, tone, balance, time scale, brightness, contrast, color, or other operating parameter of the player. |
