| 摘要 |
<p>PURPOSE:To obtain an effective matrix switcher by which a user can immediately determine, store, and switch a video arrangement pattern, by arranging input number keys, output number keys, and functional keys on a front panel and forming multiwindows. CONSTITUTION:Corresponding windows 13A-13D indicate '1' by the depression of an input key 11-1 and output keys 14-A-14-D. The pattern is registered in an input/output control circuit 2 by the depression of a key 12a, and a switching circuit 1 is connected in this state, and the pattern is erased by the next depression of the key 11. The pattern is collectively held and recorded in a storage control circuit 3 by a key 12g, and patterns preceding and following the current register pattern are called by keys 12f and 12e. When keys 11 and 12f and a LAC key 12d are depressed, the compensation input is stored in an LAC circuit 9, and the extinction of the video input is detected from the output of the switching circuit 1 to command an input selecting circuit 4, and a selected video signal is supplied to the extinction line to prevent a break of pictures. Various patterns are executed from a chip 7a by a key 12h. By this constitution, input and output lines are selectively and effectively connected.</p> |
