| 摘要 |
PURPOSE:To obtain an excellent reproduced picture free of vertical synchronism disorder by substituting a reproduced video signal, vertical synchronizing signal, and several horizontal synchronizing signals preceeding them by false synchronizing signals during special reproduction. CONSTITUTION:Outputs of rotary magnetic heads 1a and 1b are demodulated by a demodulator 4, whose output is applied to a mixing circuit 5 and a horizontal synchronizing signal separating circuit 6. A continuous signal generated by a PLL circuit 9 is led to a gate circuit 11 through a delay circuit 10. Gate pulses from a pulse generator 12 are led to a gate circuit 11 and the demodulator 4 and also led to a pulse generator 13 to generate a false horizontal synchronizing signal and a flase vertical synchronizing signal. Those synchronizing signals are added to a demodulated video signal by the mixing circuit 5. |
