发明名称 DISK DUBBING DEVICE
摘要 PURPOSE:To directly perform the dubbing recording of an RF signal reproduced from a master disk side on a slave disk side and to suppress the lowering of an S/N and picture quality, by controlling a rotational phase on the slave side by using a reference signal fixed and delayed from the master disk side. CONSTITUTION:When the dubbing recording of information is performed from a master disk 17 to a slave disk 18, system controls 35 and 45 in a reproducing system and a recording system are connected via interface circuit 36, and bidirectional control is available. A dubbing connection signal (a) is inputted from the control 45 to a recording control circuit 32 and a reference signal control circuit 34, and the circuit 32 selects the RF signal inputted from a signal processing circuit 30, and outputs it to a laser driving circuit 33. Also, similarly, the circuit 34 selects a horizontal synchronizing signal inputted from a delay circuit 29, not the signal from a reference signal generation circuit 39, and outputs it to a motor control circuit 41. And a disk 18 is rotated fitting to a phase at the circuit 34 shifted by the delay time of the circuit 29 from the rotational phase of the disk 17.
申请公布号 JPS63129557(A) 申请公布日期 1988.06.01
申请号 JP19860274080 申请日期 1986.11.19
申请人 HITACHI LTD;HITACHI VIDEO ENG CO LTD 发明人 TAKAYAMA CHIHARU;NISHIZAWA MASAJI
分类号 G11B19/28;G11B7/28;G11B19/02 主分类号 G11B19/28
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