| 摘要 |
PURPOSE:To obtain accurate position information of ghost by providing a control pulse memory circuit and by using signals which have a constant time relation, generated from the circuit. CONSTITUTION:When a ghost is detected by using a transversal filter, it is necessary to detect how far the ghost signal is from a synchronizing signal part and then store it as position information by a digital signal. Then, if the synchronizing signal itself is disordered when the distance between the synchronizing signal and the position of the ghost is measured, the position information of ghost becomes inaccurate. For this purpose, control pulse memory circuit 28 is provided and signals, havng a constant time relation, obtained from this circuit 28 and the vertical synchronizing pulses are used to obtain accurate position information of ghost. |
