EMPHASIS OR DE-EMPHASIS CHARACTERISTIC CHANGEOVER CIRCUIT

摘要

PURPOSE:To improve the S/N of a recording and reproducing signal by applying emphasis or de-emphasis in response to the kind of a signal component in a horizontal synchronization period. CONSTITUTION:Plural emphasis circuits 11-13 are arranged to a recording circuit and a recording switching circuit 14 is used in response to the kind of the signal component within a horizontal synchronizing signal period to select the emphasis characteristic. Moreover, plural de-emphasis circuits 21-23 are arranged to a reproduction circuit and a reproduction side switching circuit 24 is used to select the de-emphasis characteristic in response to the kind of the signal component in the horizontal synchronizing signal period. Since the optimum emphasis and de-emphasis is implemented for each signal component in this way, the S/N in recording and reproduction is surely improved.