Calibration and merging unit for video adapters

Details Calibration and merging unit for video adapters Calibration and merging unit for video adapters

1995-10-13

1998-11-10

Lee, Michael

Television

Monitoring, testing, or measuring

348552, 348511, 345435, H04N 1700, H04N 1702

Patent

active

058351345

ABSTRACT:
In a computer system, a system video adapter and an add-on video adapter generate video signals according to different dimensional characteristics. The dimensional characteristics of the system adapter are calibrated by a calibration unit so that the video signals can simply be merged. The calibration unit comprises a comparator for detecting pixel signals of calibration lines generated by the system adapter at predetermined horizontal and vertical positions of a display device. The comparator, in response to detecting the pixel signals exceeding a predetermined reference signal, cause a latch to store counts of a counter. The counts represent the horizontal and vertical positions of the detected signals. The counts are presented to the add-on video adapter as calibration parameters. The add-on video adapter can use the calibration parameters to generate video signals which can be directly merged with the video signals of the system video adapter.

REFERENCES:
patent: 4183045 (1980-01-01), Herrmann et al.
patent: 5155595 (1992-10-01), Robison
patent: 5327156 (1994-07-01), Masukane et al.
patent: 5345554 (1994-09-01), Lippincott et al.
patent: 5402147 (1995-03-01), Chen et al.
patent: 5404437 (1995-04-01), Nguyen
patent: 5438663 (1995-08-01), Matsumoto et al.
patent: 5611033 (1997-03-01), Pitteloud et al.
patent: 5621869 (1997-04-01), Drews

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