H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/01 (2006.01) H04N 11/20 (2006.01)
Patent
CA 2164372
A converter comprising an input terminal 1 for receiving a chrominance signal of 4:2:2P format progressive scan signal, a low pass filter 2 for passing low frequency component contained in the chrominance signal input to the input terminal 1, high pass filter 3 for passing high frequency component contained in the chrominance signal input to the input terminal 1, a detection means 4 for detecting the high frequency component level of the chrominance signal filtered with the high pass filter 3, a sub-sampling means 6 for sub- sampling the chrominance signal and converting the sub- sampled signal into a chrominance signal of 4:2:0P format progressive scan signal and a switch 5 for connecting the low pass filter 2 and the sub-sampling means 6 to input the low pass filtered chrominance signal to the sub-sampling means 6 when the high frequency component level is detected to be a predetermined level or higher, and for connecting the input terminal 1 and the sub-sampling means 6 to input the chrominance signal input to the input terminal 1 to the sub-sampling means 6 when the high frequency component level is detected to be lower than the predetermined level.
Nippon Television Network Corporation
Smart & Biggar
LandOfFree
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