Digital image exchange system
First Claim
1. A digital image exchange system comprising:
- a single bidirectional data transmission line for exchanging digital images;
video RAM means;
video signal generator means for accessing data from said video RAM means and for developing at least two video signals corresponding respectively to the accessed data;
a plurality of modulator means for modulating said video signals to form transmitted signals in at least two different frequency bands to be transmitted on said data transmission line;
a plurality of demodulator means coupled to said transmission line at a location remote from said modulator means for demodulating said transmitted signals in each of said at least two frequency bands to form at least two corresponding video signals; and
at least one video display device operatively coupled with said each of said demodulator means for displaying visual images corresponding to the respective video signals.
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Abstract
A digital image exchange system comprises a data transmission line, at least one video RAM, at least one video signal generator for accessing data from the video RAM and for developing at least two video signals corresponding respectively to the accessed data, and at least one modulator for modulating the video signals to form transmitted signals in at least two different frequency bands to be transmitted on the data transmission line. At least one demodulator is coupled to the transmission line at a location remote from the modulator for demodulating the transmitted signals in each of the at least two frequency bands to form at least two corresponding video signals; and at least one video display device is operatively coupled with the demodulator for displaying visual images corresponding to the respective video signals.
53 Citations
21 Claims
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1. A digital image exchange system comprising:
- a single bidirectional data transmission line for exchanging digital images;
video RAM means;
video signal generator means for accessing data from said video RAM means and for developing at least two video signals corresponding respectively to the accessed data;
a plurality of modulator means for modulating said video signals to form transmitted signals in at least two different frequency bands to be transmitted on said data transmission line;
a plurality of demodulator means coupled to said transmission line at a location remote from said modulator means for demodulating said transmitted signals in each of said at least two frequency bands to form at least two corresponding video signals; and
at least one video display device operatively coupled with said each of said demodulator means for displaying visual images corresponding to the respective video signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a single bidirectional data transmission line for exchanging digital images;
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10. A digital image exchange system comprising:
- a host computer system;
a plurality of work stations located remotely from said host computer system; and
a single data transmission line means bidirectional coupling said host computer system with said plurality of work stations;
said host computer system including video RAM means, video signal generator means for accessing data from said video RAM means and for developing at least two video signals corresponding respectively to the accessed data, and a plurality of modulator means for modulating said video signals to form transmitted signals in at least two different frequency bands to be transmitted on said data transmission line;
each of said work stations comprising demodulator means coupled to said transmission line for demodulating said signals in each of said at least two frequency bands to form at least two corresponding video signals, and video display means operatively coupled with said demodulator means for displaying visual images corresponding to the respective demodulated video signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
- a host computer system;
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20. A digital image exchange system comprising a host computer system;
- a plurality of work stations remote from said host computer system;
at least one display station located remotely from said host computer system and from said plurality of work stations, and a single bidirectional data transmission line means for exchanging digital images;
said host computer system and each of said work stations including video RAM means, video signal generating means for accessing data from said video RAM means and for developing video signals corresponding to the accessed data, and modulator means for modulating said video signals to form transmitted signals in a given frequency band to be transmitted on said data transmission line, each of said host computer and said plurality of work stations transmitting said transmitted signals in a different frequency band;
said display station including a plurality of demodulator means coupled to said data transmission line means for demodulating the transmitted signals in each of said frequency bands to form corresponding video signals, and video display means operatively coupled with said demodulator means for displaying visual images corresponding to the respective demodulated video signals. - View Dependent Claims (21)
- a plurality of work stations remote from said host computer system;
Specification