| 摘要 |
PURPOSE: To prevent the color slurring or color nonuniformity of reproduced image by highly precisely controlling the rotation of optical disk and highly precisely controlling the phase of regenerative video signal to exactly correct the tangential error of regenerative video signal. CONSTITUTION: At an optical disk player 1, a read beam 4 is turned so as to be made incident on an information track 9, by using an optical device 2, reflected signals modulated by reflecting and non-reflecting regions 10 and 11 on the information track 9 are collected. Frequency modulated video signals are reproduced from these reflected optical modulated signals. Further, a rotating means is controlled, based on the difference between a real rotational frequency signal showing the rotation frequency of optical disk and a reference rotational frequency signal. The phase of regenerative video signal is controlled, based on the phase difference between a color burst signal extracted from the regenerative video signal and a color subcarrier frequency signal. Then, since a highest color subcarrier frequency in the reference signal is used, the phase of regenerative video signal is controlled highly precisely. |
