| 摘要 |
The color balance, hue, saturation, luminance, and other parameters of digital video signals are corrected entirely in the digital domain. Correction signals are combined with the digital video signals and new digital video signals are created to replace the original signals. Thus, color correction is performed without victorial addition or similar techniques. A digital "six-vector" color correction circuit, as well as an infinitely variable color selection correction circuit are provided. Also provided is a window for isolating the color corrections, with the capability of limiting the isolation provided by the window to a single selected hue so that one color can be corrected under the restrictions of the window, while others are corrected free of those restrictions. A separate window can be provided simultaneously for each of six colors and the infinitely variable correction circuit. Different corrections of the same color can be made inside and outside of the window. A digital computer is used to generate phase, amplitude and other signals to make corrections corresponding to the settings of adjustment knobs. Preferably, register files are provided for storing multiple different signal levels, with progressive selection being made among the signal levels while traversing the boundary of a window so as to provide a "soft" edge for the window.
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