Video noise reduction system with signal emphasis preceding FM modulation upper-band luminance

Claim 1

A video noise reduction system for use in a recording apparatus adapted to record red, blue and green primary color component video signals on a plurality of separate tracks of a magnetic recording medium, comprising: means for frequency modulating the red and blue primary color component video signals and recording the frequency modulated signals on separate tracks of the magnetic recording medium; matrix circuit means for matrixing the red, blue and green primary color component video signals to provide a wide-band luminance signal; band splitter circuit means connected to the matrix circuit means for splitting the wide-band luminance signal into lower-band and upper-band luminance signals; means connected to the band splitter circuit means for emphasizing low level components of the upper-band luminance signal to produce a level emphasized upper-band luminance signal; adder circuit means for adding the lower-band luminance signal and the level emphasized upper-band luminance signal to produce an added luminance signal; means connected to the adder circuit means for time-base expanding the added luminance signal and for separating the time-base expanded luminance signal into a plurality of narrow-band luminance signals; and means for frequency modulating the narrow-band luminance signals and recording the frequency modulated narrow-band luminance signals on separate tracks of the magnetic recording medium.