发明名称 |
RECORDING AND REPRODUCING METHOD OF SYNCHRONOUS SIGNAL |
摘要 |
PURPOSE:To realize a stable control for the number of rotations of a recording medium, by recording the digital signal comprising the synchronous and data signals with a modulating system of the synchronous signal part different from that of the data signal part and then demodulating the above-mentioned synchronous signal during the reproduction. CONSTITUTION:An audio signal I is converted into a digital signal through a PCM modulator 1. Both the digital signal received a PCM plus a synchronous signal are delivered to the side of output (c); while a signal showing the period of the synchronous signal is produced at the side of output (b). The signal of output (c) is supplied to a modulator 2 and an FM modulator 3. Then a pilot signal (d) delivered from an oscillator 5 is gated by the signal of output (b) via a gate circuit 4, and the output signal (c) receives an FM modulator by a burst signal (e). |
申请公布号 |
JPS5727413(A) |
申请公布日期 |
1982.02.13 |
申请号 |
JP19800100690 |
申请日期 |
1980.07.22 |
申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
IMANAKA RIYOUICHI;ABE TADASHI |
分类号 |
G11B20/14;G11B3/00;G11B7/00;G11B19/28;G11B20/10;G11B20/12;H04L7/04 |
主分类号 |
G11B20/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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