| 摘要 |
AN ANALOG COLOR VIDEO SIGNAL IS PREVENTED FROM BEING SATISFACTORILY COPIED BY INSERTING A PHASE-SHIFTED COLOR BURST SIGNAL (B, C) OF PREDETERMINED DURATION INTO A PREDETERMINED LOCATION OF THE USUAL BURST INTERVAL (A) OF THAT ANALOG COLOR VIDEO SIGNAL. THE PREDETERMINED LOCATION MAY PRECEDE THE NORMAL COLOR BURST SIGNAL, OR IT MAY FOLLOW THE NORMAL COLOR BURST SIGNAL OR IT MAY BE LOCATED IN THE MIDDLE OF THE BURST INTERVAL (A).
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