A luminance signal processing circuit of a VCR functions as a non-correlation component enhancement circuit during recording, and as a line correlation noise reduction circuit during reproduction. The luminance signal processing circuit enhances the non-correlation components in the luminance signal utilizing a 1H delay circuit of the output side of a conventional 3 line logical comb filter which is used as a Y/C separting circuit, during recording. The luminance signal processing circuit removes the noise components in the reproduced luminance signal utilizing a 1H delay circuit of the input side of a conventional 3 line logical comb filter which is used as a noise reduction circuit for remaining color components, during reproduction.
An apparatus for carrying out the Y/C separation of a composite color video signal used in a television receiver, a video cassette recorder and other and for carrying out the Y/C separation of various signals superposed on the video signal in the vertical retrace interval thereof, without distorting the various signals is disclosed in which apparatus a switching operation is performed so that the composite color video signal itself is used as a luminance signal in the teletext period of the vertical retrace interval of the composite color video signal, and a Y/C separator of the non-correlation type is switched to operate in the remaining period of the vertical retrace interval.
