| 摘要 |
PURPOSE: A signal processing circuit is provided to obtain an exact synchronous signal by conducting a synchronous separation for a signal without executing a non linear emphasis process at a standard mode, and by conducting a synchronous separation after executing a non linear emphasis process at a high quality mode. CONSTITUTION: A first converting part(20) selective outputs a first signal and a second signal, obtained by a non linear emphasis process of the first signal, according to a mode. A second converting part(60) selectively outputs a third signal from the first converting part and a fourth signal, obtained by the non linear emphasis process and by a non linear deemphasis process, according to the mode. A synchronous separating part(15) separates a synchronous signal from an output signal of the second converting part. In a case of conducting a signal record at the standard mode, the first and second converting parts output the first signal and the third signal, respectively. In a case of conducting a signal record at the high quality mode, the first and second converting parts output the second signal and the fourth signal, respectively.
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