发明名称 |
Magnetic recording and reproducing apparatus. |
摘要 |
<p>A frequency-modulated luminance signal and a frequency-lowered color signal are combined into a frequency-division multiplexed signal through a frequency-division multiplexing process. The frequency-modulated luminance signal is derived from a luminance signal through a frequency modulation process. The frequency-lowered color signal is derived from a carrier chrominance signal through a frequency-down conversion process. The frequency-division multiplexed signal is recorded onto a magnetic recording medium. A band of the luminance signal extends toward a high frequency side beyond a color subcarrier frequency of the frequency-lowered color signal. A pilot signal is selectively added to the signal to be recorded in accordance with whether or not a quantity of a high-frequency luminance signal component contained in the color signal in the signal to be recorded is smaller than a reference quantity. During reproduction, a cutoff frequency of a high pass filter may be varied in accordance with whether the pilot signal is present in or absent from a signal reproduced from the magnetic recording medium, the high pass filter separating a reproduced luminance signal from a frequency-division multiplexed signal reproduced from the magnetic recording medium.</p> |
申请公布号 |
EP0289326(A1) |
申请公布日期 |
1988.11.02 |
申请号 |
EP19880303876 |
申请日期 |
1988.04.28 |
申请人 |
VICTOR COMPANY OF JAPAN, LIMITED |
发明人 |
TSURUTA, MASAHIKO;SHIBAYAMA, KENJI;KIDO, KOUICHI |
分类号 |
H04N9/79;H04N9/83;(IPC1-7):H04N9/80 |
主分类号 |
H04N9/79 |
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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