| 摘要 |
PURPOSE: To surely read out film information recorded in a recording part corresponding to each frame. CONSTITUTION: The film information recorded in the magnetic recording part of each frame is picked up by a magnetic head 6 and an Ix data read circuit 7 while feeding the film F by a feeding motor 3, and respective signals constituting data on film information are detected by a signal detection part 802. Furthermore, the frequency fIx of the signal is calculated by a frequency arithmetic part 807 from the period TM3 of the detected signal, and the pass band of a BPF 72 in the circuit 7 is adjusted to the frequency fIx by a filter constant setting part 808 based on the calculated result. By changing the filter characteristic of the BPF 72 in accordance with the frequency of the signal picked up, the film information is surely read in spite of the fluctuation in the feeding speed of the film F. |
