| 摘要 |
PURPOSE:To eliminate simply vertical vibration generated on the picture screen in the slow-motion reproducing time and so on of a VTR, by substituting the vertical synchronizing signal of the reproduced video with a false vertical synchronizing signal. CONSTITUTION:The phase fluctuation signal forming circuit consisting of waveform shaping circuit 45 and RSFF circuit 50 forms a signal indicating the phase fluctuation quantity on a basis of the rotation phase angle of a rotary magnetic head and reproducing control pulses from fixed head 20. This signal becomes a flase vertical synchronizing signal through phase adjustment equipment 51 which has a characteristic reverse to the vertical deflecting circuit of the TV receiver, phase modulator 52 and waveform shaping circuit 53 and is supplied to adder 55. Meanwhile, the reproduced video signal from demodulator 35 has the vertical synchronizing signal eliminated by vertical synchronizing signal eliminating circuit 54 and is applied to adder 55. Thus, the vertical synchronizing signal of the reproduced video signal is substituted with the false vertical synchronizing signal, and the false vertical synchronizing signal is supplied to the TV receiver, so that vertical vibration of the picture in the slow-motion reproducing time and so on can be eliminated. |
