| 摘要 |
<p>By providing in a field-frequency doubling circuit comprising a converter circuit (3) of an A, A, B, B, type, an interpolation circuit (31) which combines in an appropriate manner the information of two subjacent lines of the first field of a picture of the television signal to be converted and the second field of a picture of the television signal to be converted, line flicker can be prevented from occurring without it being necessary to provide a movement detector and a change-over switch for an A, B, A, B-type conversion.</p> |
