Consider two raster systems with the resolutions of 640 x 480 and 1280 x 1024.

1 month ago

a. How many pixels could be accessed per second in each of these systems by a display controller that refreshes the screen at a rate of 60 frames per second?

Since 60 frames are refreshed per second.

Each frame consists of 640 x 480 pixels,

  • The access rate of such a system = (640 x 480) * 60 = 1.8432 x 107 pixels/second.

 For the 1280 x 1024 system,

  • The access rate is (1280 x 1024) * 60 = 86432 x 107 pixels/second.

b. What is the access time per pixel in each system?

The access time per pixel = 1/ access rate.

The access time is around 54 nanoseconds/pixel for the 640 x 480 system,

The access time is around 12.7 nanoseconds/pixel for the 1280×1024 system.

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Bijay Satyal
Oct 22, 2021
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