| 摘要 |
PURPOSE:To improve a picture quality by preferentially selecting a Y/C separating part separating and operating in a diagonal direction by a Y/C separating part selecting means when a detecting output having the contents of the presence of a correlation is applied from a diagonal correlation detecting circuit detecting the correlation on the same diagonal direction as the diagonal direction in which the Y/C separating part executes a separating operation is applied. CONSTITUTION:The data D3, D14, D25 of in-phase in a color difference signal component in the diagonal direction C have the mutual differences operated in a subtraction circuit, thereafter, the differences are made absolute values respectively through an absolute value circuit and when there is the correlation, they are converted to difference signals SC1, SC2, SC3 taking substantially 0 level and applied to a mean value circuit 54. A comparator 56 compares incoming difference signals SC with SG, and outputs a diagonal tendency instructing signal CG that takes a logic '0' indicating that the correlation of the diagonal direction C is stronger than the diagonal direction G when the difference signal SC is smaller, and on the contrary, takes a logic '1' indicating that the correlation of the diagonal direction G is stronger than the diagonal direction C when the difference signal SG is smaller to a decoder 46.
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