| 摘要 |
PURPOSE:To not only obtain a good slow motion reproducing picture image without rolling but also delete an adjusting section by making a frequency of a horizontal synchronizing signal fixed. CONSTITUTION:A rolling correcting pulse generator is removed and the second frequency discriminator 2 separated from a signal processing circuit 5 is newly added. A reference frequency or the like of the first frequency discriminator 1 is converted by the output of the second frequency discriminator 2, a feedback to a cylinder servo system is carried out. At this time, from a signal obtained from a phase pulse generator 10, a head change-over signal is formed, and by the head change-over signal, an output of the third frequency discriminator 3 is held to a value before the head is changed over for a fixed time at the time of changing over the head.
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