Two-way microwave television system
First Claim
1. A two-way television system, comprising:
- a master station, including, a video camera means for generating a first video signal, means for transmitting said first video signal, means for receiving a composite video signal, and a video display means for displaying said composite video signal;
a relay station including, a first receiver means for receiving said first video signal, a first transmitter means for transmitting said received first video signal, a second receiver means for receiving a second video signal, a video camera means for generating a third video signal, a special effects generator means for creating said composite video signal by combining said second and third video signals, a second transmitter means for transmitting said composite video signal, and a video display means for displaying said first video signal; and
a remote station, including means for receiving said first video signal transmitted by said first transmitter means, a video display means for displaying said first video signal, a video camera means for generating said second video signal, and means for transmitting said second video signal.
1 Assignment
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Accused Products
Abstract
A two-way microwave television system for linking a master or teaching station with a plurality of sub-station schools via a single microwave link is presented. The sub-station schools are located at dispersed school sites and function as relay stations to complete a network covering a geographical area of greater dimensions than could be achieved by the master station unassisted. A single duplex microwave channel is used to transmit a picture originating at the master station and special effects generators located at each of the sub-station school relay sites combine, through a special video switching network, responses from each sub-station school to form an integrated frame containing the response from each sub-station in a format which can be transmitted on a single channel carrier.
26 Citations
5 Claims
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1. A two-way television system, comprising:
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a master station, including, a video camera means for generating a first video signal, means for transmitting said first video signal, means for receiving a composite video signal, and a video display means for displaying said composite video signal; a relay station including, a first receiver means for receiving said first video signal, a first transmitter means for transmitting said received first video signal, a second receiver means for receiving a second video signal, a video camera means for generating a third video signal, a special effects generator means for creating said composite video signal by combining said second and third video signals, a second transmitter means for transmitting said composite video signal, and a video display means for displaying said first video signal; and a remote station, including means for receiving said first video signal transmitted by said first transmitter means, a video display means for displaying said first video signal, a video camera means for generating said second video signal, and means for transmitting said second video signal. - View Dependent Claims (2, 3)
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4. A video switching network, comprising:
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a first single-pole double-throw video switch for connecting a transmitter to a video distribution network in a first position or to a second single-pole double-throw video switch in a second position; said second single-pole double-throw video switch including first contact means connected to a special effects generator and second contact means coupled to a contact of a third single-pole double-throw switch having a contact arm connected to a second video distribution network and the second contact of which is connected to a contact of a fourth single-pole double-throw video switch whose other contact is connected to said special effects generator and whose movable contact is connected to a contact of a fifth single-pole double-throw video switch whose other contact is connected to said first video distribution network and whose movable contact is connected to a second transmitter means; and a sixth single-pole double-throw video switch having a movable contact connected to a first receiver means and one contact connected to said special effects generator and a second contact connected to a contact of a seventh single-pole double-throw video switch whose movable contact is connected to said second video distribution network and said other contact is connected to a contact of an eighth single-pole double-throw video switch whose other contact is connected to said special effects generator and whose movable contact arm is connected to a second transmitter means. - View Dependent Claims (5)
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Specification