| 摘要 |
PURPOSE:To prevent the deterioration of details with respect to the pictures of primary color and pictures in which three primary color signals are mixed by adding signals in which amplitude change is large in the signals of specified first and second high frequency components to signals of low frequency components. CONSTITUTION:In an image-sending side, an oscillation change in the high frequency component VH in a luminance signal consisting of the red, green and blue (R, G and B) signals to which gamma-correction is executed, and the high frequency component YgammaCH in a signal in which the luminance signal consisting of linear R, G and B signals to which gamma-correction is not executed is gamma-corrected are compared and the signal having a large change quantity is added to the low frequency component YL in the luminance signal consisting of gamma-corrected R, G and B signals as the interpolation signal. Thus, interpolation of gamma correction without the deterioration of the details can be realized with respect to the picture with the optional mixing ratio of the three primary color signals and the picture quality of a television can be made improved and detailed.
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