Luminance/chrominance separating apparatus having a spatial filtering effect

DETAILED DESCRIPTION According to one aspect of this invention, there is provided a luminance/chrominance separating apparatus in which a luminance signal and chrominance signal are extracted from a composite color television signal by a comb filter comprising delay means, adding means and subtracting means.
A low frequency signal component is extracted from the chrominance signal and then passed through a variable attenuator.
The low frequency signal component from the variable attenuator is added to the luminance signal to produce a compensated luminance signal.
According to another aspect of this invention, there is provided a picture compressing system comprising a luminance/chrominance separating apparatus in which the low frequency signal component of the chrominance signal is added to the luminance signal after the passage through the variable attenuator, the variable attenuator having a transmission factor controlled by the compression ratio for the vertical direction.
The features and advantages of this invention will be understood from the following detailed description of a preferred embodiment of this invention taken in conjunction with the accompanying drawings.