| 摘要 |
A multiplexer interlaces first and second video signals to form a third video signal comprising fields from the first and second video signals in alternating sequence. A filter system enables a first person, when viewing the third video signal, to see the first video signal but not the second video signal and a second person, when viewing the third video signal simultaneously with the first person, to see the second video signal but not the first video signal.
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