Double-buffering of video data

Details Double-buffering of video data Double-buffering of video data

2008-07-08

2011-11-22

Nguyen, Hau (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics display memory system

Plural storage devices

C345S531000, C345S534000, C345S540000

Reexamination Certificate

active

08063910

ABSTRACT:
Data is written to one of two frame buffers in write access cycles having write and non-write sub-periods. Data is read out to a display device from the other of the two frame buffers in read access cycles having read and non-read sub-periods. The writing of data and the reading of data are switched to a respective opposite frame buffer during a switching opportunity, a switching opportunity occurring when a read access cycle is in a non-read sub-period and a write access cycle is in a non-write sub-period. A count of the number of times a switching opportunity is not executed because a read access cycle is in a non-read sub-period while a write access cycle is in a write sub-period is incremented. If the count exceeds a particular threshold, a write access cycle subsequent to the count exceeding the threshold is masked. When a write access cycle is a masked data is not written into a buffer.

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