发明名称 SERVO CIRCUIT FOR VIDEO TAPE RECORDER
摘要 <p>PURPOSE:To prevent the appearance of noise on a connecting part between the start of recording and the end of recording at the time of assemble edition by reproducing a pilot signal to be the base of a tracking error signal by the 2nd magnetic heads. CONSTITUTION:The 2nd magnetic heads C, D for previously scanning tracks to be scanned by magnetic heads A, B for recording/reproducing video signals are fixed to a rotary cylinder 30 provided with the magnetic heads A, B and tracking control is executed by a tracking error signal obtained by the 2nd magnetic heads. Namely, the 2nd magnetic heads C, D reproduce a pilot signal recorded on recording tracks and a tracking error signal is obtained by finding out a difference DELTAfb between the frequency f4 of the obtained reproduced pilot signal and the frequency of a reference pilot signal f1 to use the tracking error signal for tracking control. Consequently, the appearance of noise on a reproduced image on the connecting part between the start of recording and the end of recording at the time of assemble edition of 8m/m VTR is prevented.</p>
申请公布号 JPH02235246(A) 申请公布日期 1990.09.18
申请号 JP19890056881 申请日期 1989.03.09
申请人 RICOH CO LTD 发明人 NISHIYAMA KIYOHARU
分类号 G11B5/588;G11B15/467 主分类号 G11B5/588
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