| 摘要 |
A method of video signal processing that reduces computational and circuit costs. The method of processing a video signal of the present invention comprises the following steps: First, receiving a video input signal including an input luminance signal and input chrominance signals from a signal source. Next, correcting the input luminance signal of the video input signal to generate a corrected luminance signal. And finally outputting the corrected luminance signal and the input chrominance signals as the enhanced video signal to the subsequent video processor, such as a TV encoder, for converting the corrected signal from digital into analog. The correction of the luminance signal is accomplished by first normalizing the luminance signal by a predetermined value of a full-scale luminance. If the normalized luminance signal is greater than a first predetermined percentage, the corrected luminance signal is equal to the input luminance signal. If the normalized luminance signal is less than the first predetermined percentage and greater than a second predetermined percentage, the input luminance signal is corrected by non-linear correction to generate the corrected signal. If the normalized luminance signal is less than the second predetermined percentage, the input luminance signal is corrected by linear correction to generate the corrected luminance signal.
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