Video decoder for decreasing noise included in chrominance signal
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United States of America Patent
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Sep 6, 2011
Grant Date -
Aug 9, 2007
app pub date -
Jan 25, 2007
filing date -
Feb 3, 2006
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Abstract
A video decoder removes noise caused by a luminance signal component when separating a chrominance signal from a composite video baseband signal. The video decoder includes a first signal generator generating a first signal, a second signal generator generating a second signal, a third signal generator differentiating the first and second signals and performing a predetermined operation on the differentiated signals to generate a third signal, an operating unit performing a predetermined operation on the third signal to output the chrominance signal, a fourth signal generator performing a predetermined operation on the first and second signals to generate a fourth signal having a value corresponding to the amplitude of the chrominance signal, and a noise removal unit correcting the chrominance signal in response to the third and fourth signals to remove luminance component noise included in the chrominance signal.
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