JPS5467410A - Recorded signal reproduczng system - Google Patents

Abstract

PURPOSE: To prevent generation of unnatural noises due to abrupt changes in levels by gradually decreasing and increasing the amplitudes of output signals at the trailing and leading ends of recorded signals.

CONSTITUTION: A synchronous separating circuit 1 generates clock pulses in synchronism with the control signals Cs from a track. When the signals CS cannot be detected, control signals AVS are impressed upon output amplitude control signals 10 and 11 so that outputs E₀ and E'₀ are gradually decreased in accordance with gain control characteristics AV. Since the time when the stop of the signals CS can be detected takes place at tE' about 1 sec later the trailing end tE of the data, the reproduction signals are delayed a time n.tE by a delay circuit 5 so that the output amplitude of the reproduction signals can be gradually decreased by the circuits 10 and 11 before the delayed reproduction signals EDD reach their trailing ends. Thus, it is possible to eliminate the uncomfortable noises due to the abrupt reduction in the signal levels at the trailing end of the recorded signals.

COPYRIGHT: (C)1979,JPO&Japio