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Old 08-02-2014, 01:10 AM
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ppppenguin ppppenguin is offline
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Since chroma bandwidth is much lower than luma the reduction in vertical resolution doesn't matter. PAL decoding just about equalises the H and V chroma resolutions.

PAL decoding also moves the chroma down by half a line wrt luma. Again this doesn't matter unless you cascade codecs. More modern comb filter decoders can keep the Y and C in vertical alignment.
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