| 摘要 |
PCT No. PCT/JP84/00532 Sec. 371 Date Jul. 5, 1985 Sec. 102(e) Date Jul. 5, 1985 PCT Filed Nov. 7, 1984 PCT Pub. No. WO85/02312 PCT Pub. Date May 23, 1985.In accordance with the present invention, a read clock frequency applied to field memories (16a) and (16b) comprising a converting circuit (16) which converts the field frequency of a video signal is changed at the unit of a vertical cycle whereby vertical cycles of video signals read out from the field memories (16a) and (16b) are made substantially equal to one another. Accordingly, a horizontal deflecting current waveform on which a parabolic wave current of, for example, the vertical cycle is superposed becomes equal during each vertical period so that it becomes possible to prevent a jitter from being produced at right and left ends of a picture screen. |
