___________________________  
           /    /                  \    \
           |   |                   |    |
         VOUT AOUT                VIN  AIN
           |   |                   |    |
  ________//___\\                _//____\\_____
|               |              |               |
|               |              |               |
|  Video Output |              |  Video Input  |
|               |              |               |
|_______________|              |_______________|