发明授权
US5982977A Apparatus and method for synthesizing information signal and reproduction control signal and information signal recording apparatus 失效
用于合成信息信号和再现控制信号和信息信号记录装置的装置和方法

Apparatus and method for synthesizing information signal and
reproduction control signal and information signal recording apparatus
摘要:
A synthesis signal which was reproduced from reproducing apparatus and converted into an analog signal includes an analog information signal and a copy control code. The copy control code is modulated by a spread spectrum. A code reading unit of the recording apparatus extracts the copy control code by an inverse spread spectrum. A code changing unit changes the copy control code by a spread spectrum as necessary. An output signal of the code changing unit is converted into a digital signal. The digital signal is subjected to processes necessary for recording and is recorded to a recording medium.
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