| 摘要 |
PURPOSE:To improve vertical resolution by drawing scanning lines twice the present scanning lines in the one field scanning period of a present television receiver. CONSTITUTION:A video signal (a) is supplied to a memory circuit 2 and also supplied to a one field period delay circuit 3 to be converted into a signal (b) delayed by one field period and the signal (b) is supplied to a memory circuit 4. The signal (b) is delayed by one field and 1/2H from the signal (a). Thus at the time a video signal of the 2nd field is supplied to the circuit 2 for example, the video signal of the 1st field is supplied to the circuit 4. A write signal W and a read signal R whose speed is twice that of the write signal W are supplied from a control circuit 5 to the circuits 2 and 4, reading out the written information twice repeatedly with the speed twice the writing speed. Thus, the signals (a) and (b) are read out with the speed twice the writing speed in the circuits 2, 4, and they are designated to signals a' and b' respectively. |
