Overlay scan line processing

Details Overlay scan line processing Overlay scan line processing

2006-02-14

2006-02-14

Nguyen, Kimbinh T. (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics display memory system

Frame buffer

C345S545000, C345S547000, C345S558000, C345S560000

Reexamination Certificate

active

06999089

ABSTRACT:
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 the buffer provides a predetermined amount of data to the current overlay scan line, the buffer begins to load the data for the next overlay scan line. In one embodiment, the buffer may begin loading data for the next overlay scan line when approximately half the current overlay scan line is displayed.

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