Method and apparatus for reproduction of a signal subject to clock frequency fluctuations from a medium.

摘要

A signal reproducing apparatus for reading out signals recorded along with clock signals on a recording medium (11). The relative velocity between a magnetic tape and magnetic heads mounted (13A,13B) on a rotary drum (12) is sensed by a rotary drum rotational velocity sensor (16) and the center oscillation frequency of a VCO in a clock-reproducing PLL circuit (23) of signal reproducing circuitry is changed in accordance with the sensed relative velocity for controlling the center oscillation frequency to be equal to the frequency of the clock components of the reproduced RF signals. The clock signal components may be reproduced as normally even although the frequencies of the clock components of the playback RF signals are changed. Besides, fluctuations in the relative velocity between the magnetic tape (11) and the magnetic head (13A,13B) may be tolerated to diminish the load on the velocity servo control operation as well as to reduce power consumption and expedite the operation. <IMAGE>