| 摘要 |
<p>Apparatus for providing a signal that indicates whether the color represented by a luminance and color difference component video signal is validly reproducible using a color display device, comprises a matrix connected to receive the luminance and color difference components and provide primary color components therefrom, and a comparator for comparing the amplitude of each primary color component with predetermined minimum and maximum levels and providing an indication if the amplitude of one or more of the primary color components is outside the range established by the predetermined maximum and minimum values therefor.</p> |
