| 摘要 |
PCT No. PCT/JP84/00553 Sec. 371 Date Jul. 18, 1985 Sec. 102(e) Date Jul. 18, 1985 PCT Filed Nov. 19, 1984 PCT Pub. No. WO85/02511 PCT Pub. Date Jun. 6, 1985.A television receiver in which a video signal of an interlaced system is received and converted in field frequency by using field memories (6a) and (6b) and then fed to a picture receiving tube (9). In this case, the picture receiving tube (9) is subjected to a vertical deflection scanning by a vertical synchronizing signal of a constant period and the video signal in each field of the video signal to be supplied to the picture receiving tube (9) is delayed by a predetermined time by controlling, for example, the read-out timings of the field memories (6a) and (6b) to thereby keep an interlace-ratio constant. Consequently, since the respective vertical cycles are equal to one another, even if the parabolic current wave of the vertical cycle for deflection correcting, for example, is superposed on the horizontal deflecting current, the horizontal deflection current waveform is equal in each vertical period so that the jitter can be prevented from being produced at the right and left ends of the picture screen. |
