Video signal controller for use with a multi-sync monitor for displaying a plurality of different types of video signals
First Claim
1. A video signal controller for use with a digital computer generating a first video signal having a first sync rate, and a video display means for receiving an output video signal and for displaying said output video signal, said controller comprising:
- tuner means for producing a second video signal having a second sync rate, different from the first sync rate;
a first multiplexer means for receiving a first input video signal and a second input video signal and for outputting said output video signal to said display means, said output video signal is either said first or second input video signal, in response to a first control signal;
first means for supplying said first video signal having the first sync rate, to said first multiplexer means as said first input video signal thereof;
second means for supplying said second video signal having said second sync rate, to said first multiplexer means as said second input video signal thereof; and
control means for generating said first control signal supplied to said first multiplexer means.
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0 Petitions
Accused Products
Abstract
A video signal controller is used with a dual sync monitor of a digital computer. The video signal controller has a tuner to generate conventional television signals. The signals from the tuner and from the computer are supplied to a multiplexer which switches between them and supplies the output signal to a dual sync monitor. The controller has three modes of operation. In a first mode, conventional television signals are displayed on the dual sync monitor. In a second mode, conventional computer signals are displayed on the dual sync monitor. Finally, in a third mode, multi video signals may be displayed to achieve, for example, picture-in-picture for display on the monitor. Finally, a method of processing the television signals for picture-in-picture display which greatly reduces the overhead required by the CPU is also disclosed.
97 Citations
30 Claims
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1. A video signal controller for use with a digital computer generating a first video signal having a first sync rate, and a video display means for receiving an output video signal and for displaying said output video signal, said controller comprising:
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tuner means for producing a second video signal having a second sync rate, different from the first sync rate; a first multiplexer means for receiving a first input video signal and a second input video signal and for outputting said output video signal to said display means, said output video signal is either said first or second input video signal, in response to a first control signal; first means for supplying said first video signal having the first sync rate, to said first multiplexer means as said first input video signal thereof; second means for supplying said second video signal having said second sync rate, to said first multiplexer means as said second input video signal thereof; and control means for generating said first control signal supplied to said first multiplexer means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A display system for use with a digital computer generating a first video signal having a first sync rate, said system comprising:
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a display means for receiving a display video signal having one of a plurality of sync rates and adapted to display said display video signal; means for generating a second video signal having a second sync rate, different from the first sync rate; first multiplexer means having a first input and a second input and an output, said first multiplexer means responsive to a first control signal for connecting said first input or said second input to said output; means for connecting said output of said first multiplexer to said display means; first means for supplying said first video signal to said first input of said first multiplexer means; second means for supplying said second video signal to said second input of said first multiplexer means; and control means for generating said first control signal supplied to said first multiplexer means. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of displaying a plurality of video signals, each having a different sync rate, said method comprising:
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generating a first video signal having a first sync rate by a digital computer means; generating a broadcast signal having a second sync rate, different from said first sync rate, by a tuner means; converting said broadcast video signal into a second video signal; supplying said first and second video signals to a switch means; outputting the video signal of said switch means to a display means for display; and switching said switch means to provide either said first video signal or said second video signal to said display means for display. - View Dependent Claims (27)
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28. A video display apparatus for displaying a plurality of video signals, each having a different sync rate, said apparatus adapted to display a first video signal having a first sync rate generated by a digital computer means, said apparatus comprising:
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tuner means for generating a broadcast video signal having a second sync rate, different from the first sync rate; means for converting said broadcast video signal into a second video signal having said second sync rate; a switch means responsive to a control signal, for receiving said first and second video signals and for providing either said first or said second video signals as an output signal thereof; display means for receiving said output signal and for displaying said output signal; and means for generating said control signal supplied to said switch means. - View Dependent Claims (29, 30)
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Specification