| 摘要 |
A time lapse video cassette recorder (VCR) includes a video head, a control head for selectively recording and reproducing a control pulse, a capstan motor moving a magnetic tape at a predetermined speed, a video signal processing circuit processing a video signal which is recorded or reproduced by the video head, a horizontal frequency corrector correcting a horizontal frequency in sync with the recording stop signal to prevent the change of the horizontal frequency which is caused by the deviation of a travel angle of the video head during 12H/24H recording, and a gain controller controlling a control gain of the capstan motor according to rotation speed of the capstan motor. The video head, in an exemplary case, is a dual-azimuth quad head. The time-lapse VCR recorder also includes and analog servo for generating a recording stop signal, a recording control pulse suitable for a time-lapse operation, a head switching pulse, a rotary switching pulse and a head amplifier switching pulse, for providing a control voltage to the capstan motor, and for controlling the phase of the capstan motor by reading the control pulse. The time-lapse VCR, thus, can be made compatible with a conventional VHS VCR. As a result, a stronger market can be created and product development time can be reduced, since the same accessories and established product lines used for the conventional VHS VCR are employed.
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