Method and structure for data traffic reduction for display refresh

摘要

A method and structure for performing a screen refresh operation in a video processing system which includes a frame buffer memory and a display controller coupled to a system bus. A status bit memory is used to store status bits which represent the repetitive characteristics of pixel data stored in the frame buffer memory. The status bits are provided to the display controller. In response, the display controller determines whether to provide pixel data by regenerating pixel data previously retrieved from the frame buffer memory or by accessing the frame buffer memory.