| 摘要 |
<p>PURPOSE:To obtain a noiseless and satisfactory search screen using a simple constitution at a low cost. CONSTITUTION:A read-out signal SPB is fed into a detection circuit 8 and a processing circuit 12 from a head 2 via a amplifier 7. The detection signal SDET of the detection circuit 8 is supplied to a microcomputer 14 after being converted into data DDET by an A/D converter 13. The memory control signal MECT is supplied from the microcomputer 14 to a controller 23 in accordance with the number of multiplication of speed and is subjected to storing processing of the image data with a fixed timing. A tracking control signal CTRK is supplied to the control section 6 so that the data DDET is maximized in the almost middle of the storing processing operation period. The signal SPB is, for example, demodulated by the processing circuit 12 to form a video signal SV and supplied to an A/D converter 24 through a processing circuit 21. Based on the signal from a controller 23, the signal SV is converted into data and stored in a memory 25 and, at the same time, the read-out data is converted into a memory video signal SVM by means of a D/A converter 26. The signal SVM is supplied to a video output terminal 32 through a switching device 30 and amplifier 31.</p> |
