[Suggestion] 2D Comb

[rgm89git]

I have an suggestion of what to add: an 2D adaptive comb (or a better luma-chroma separation).

After that, general composite captures are actually a bit sharper that ntscQT's, because of the use of an 2D adaptive comb filter.

Here some examples, just need to adapt to ntscQT's code: NTSC Decoding Basics (Part 4) - Adaptive Comb Filter Decoders ld-decode - ld-chroma-decoder - comb.cpp (for C++)