| 摘要 |
<p>PURPOSE:To reproduce a binary signal without the disturbance in a character of a graph by using a pixel clock having the same frequency as that of the pixel clock used at the generation in applying resampling to an analog binary video signal. CONSTITUTION:An analog video signal including a binary signal is sampled at a video signal source 1 by using a pixel clock and the result is fed to a digital equipment 2. The digital signal is converted again into an analog signal, synthesized with a pixel clock by a composite processing circuit 6, and inputted to a succeeding analog input digital video equipment. A pixel clock recovery circuit 9 recovers a pixel clock inserted at the sending side. A variable delay circuit 12 is controlled by the output of phase difference detecting means 10-19 and the output phase of the pixel clock is aligned. The pixel clock in aligning with the frequency and phase is used as the sample clock of an A/D converter 21 and the inputted composite video signal is digitized and outputted to the equipment 22.</p> |
