| 摘要 |
<p>A video noise reduction circuit for use in a video signal recording apparatus records red, blue and green primary colour component video signals on a plurality of separate tracks of a magnetic recording medium. The component video signals are supplied to a matrix circuit (2) which produces a wide-band luminance signal. A band splitter circuit (10) splits the wide-band luminance signal into an upper-band luminance signal and a lower-band luminance signal, and an expansion circuit (14) expands the low level components of the upper-band luminance signal before the upper-band luminance signal is frequency modulated. Since the expansion circuit (14) follows the band splitter circuit (10) having a flat phase versus frequency characteristic, the video noise reduction circuit can reduce video noise without causing distortion of the frequency modulated video signal.</p> |
