| 摘要 |
PURPOSE:To obtain an emphasized natural border line by separating a composite video signal into a chrominance signal and a luminance signal, which are free from a cross color and a dot disturbance, and also correcting the vertical border line of the luminance signal. CONSTITUTION:A signal M which has been delayed by 1 horizontal period, and a signal T delayed by 2H horizontal period are generated by the 1H delay lines 22, 23 from a composite video signal B of the input terminal 21, and the operation of M-(B+T)/2 and M+(B+T)/2 is executed by the compounding circuits 24, 25. The output of the circuit 24 is input to the BPF26, and it is separated and output as a chrominance signal from the terminal 27. Also, the output of the circuit 25 is a luminance signal, and it is input to the compounding circuit 32 through the delay 30 and the LPF31. Also, the output of the circuit 25 is pick up only an output of the vertical border line correcting signal by the LPF28, the amplitude is adjusted by the variable gain amplifying circuit 29, and it is compounded with the luminance signal component whose delay time from the LPF31 is made to coincide by the circuit 32, and the resultant is output from the terminal 33. |
