| 摘要 |
An overlay video processing system provides an early start to pixel processing for the next overlay scan line. The overlay processor begins processing the next overlay scan line while still displaying the current scan line. A FIFO buffer is used to provide the overlay video data to the display. When it is determined that the buffer is capable of storing the next overlay scan line, a memory read burst is triggered, and the buffer begins to load the data for the next overlay scan line.
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