Method for converting progressive scan signals and converter the

Details Method for converting progressive scan signals and converter the Method for converting progressive scan signals and converter the

1995-12-04

1997-09-09

Kostak, Victor R.

Television

Format conversion

Specified chrominance processing

348441, H04N 701

Patent

active

056661665

ABSTRACT:
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 4:2:2P 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.

REFERENCES:
patent: 5333014 (1994-07-01), Drewery et al.
patent: 5457498 (1995-10-01), Hori et al.
patent: 5604540 (1997-02-01), Howe

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