| 摘要 |
PURPOSE:To facilitate the correction of a chroma signal depending on the correction amount of a luminance signal by converting a chroma signal into a base band signal. CONSTITUTION:Since a chroma signal is demodulated into color difference signals R-Y, B-Y, that is, base band signals, coefficients beta, gamma in coefficient integration circuits 21,22 are set suitably in response to the correlation of the signals R-Y,B-Y respectively to eliminate noise in the signals R-Y, B-Y. The noise component is eliminated from the chroma signal generated in a chroma signal modulation circuit 25 from the color difference signal whose noise component is eliminated and superimposed on a luminance signal whose noise is eliminated by a mixer 13 further, then an output composite video signal whose noise component is eliminated is obtained from the mixer 13.
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