| 摘要 |
A method and apparatus for sensing changes in digital video data includes a display control device which includes a video data interface, a detector and a controller. The video data interface receives digital video data. The detector determines whether image data is static by calculating the CRC of digital video data. The controller generates control signals in response to the detection of static digital video data. The controller may be coupled to one or more devices, including the backlight of a video display device. The backlight may be turned off when static data is detected. The backlight may be turned on again when non-static data is detected. Efficient power management is provided by controlling the state of a device based upon digital video data content.
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