| 摘要 |
PURPOSE:To attain low cost and space saving by converting two color difference signals fed individually into a serial alternate signal so as to apply dropout compensation processing of a 2-system signal by one line delay circuit only. CONSTITUTION:A changeover switch 208 is switched at the production of dropout, its output is fed to a 1H delay circuit 207 and a 1H delay output is selected by the switch 208 at dropout to compensate the missing of signal. A dropout pulse S76 whose time base is doubled obtained from an output of a memory 214 is supplied to the switch 208 via a parallel/serial converter 215 and a latch 216. Thus, the output S69 of the switch 208 is replaced by an output of the circuit 207 in the dropout period synchronized with a reference clock and the missing part is compensated by the signal of the adjacent line.
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