Computer graphics processing and selective visual display system – Plural display systems – Remotely located
Patent
1995-05-05
1997-01-14
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural display systems
Remotely located
345 1, 345169, 364514R, G09G 500
Patent
active
055944620
ABSTRACT:
The invention includes systems and methods for calibrating bit transmission rates in a computer system which uses selected raster lines of a frame-scanning display device for serial data transmission to an external receiving device. A system in accordance with the invention includes a data processor and a frame-scanning display device having a total number of available raster lines per display frame. The computer also has an internal timer which is set to generate timing signals at a predetermined frequency. The data processor is programmed to count the number of timing signals and the number of frame scans of the frame-scanning display device which occur during a selected measurement period. The selected measurement period is preferably defined by the occurrence of a predetermined number of frame scans. The data processor is further programmed to calculate a frame scan period of the frame-scanning display device based upon the predetermined frequency of the timing signals, the predetermined number of timing signals, and the number of frame scans counted while counting the predetermined number of timing signals. The frame scan frequency is used to determine the correct spacing of the data transmission raster lines relative to each other within the total number of available raster lines. This spacing establishes a desired serial transmission bit rate to the external receiving device.
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Brzezinski Philip
Dvorachek, III Thomas J.
Fishman Neil S.
Miller J. Mark
Chang Kent
Hjerpe Richard
Microsoft Corporation
Timex Corporation
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