_,,,^..^,,,_ said:

AntcuFaalb said:

_,,,^..^,,,_ said:

Laserdisc effective chroma horizontal resolution will be (at best) around 120 lines, or about 160 pixel, when using the best SuperNTSC perfectly mastered disc, while others have less... that's at native sampling rate of 3.375MHz; when divided by four, we get 40 pixel at best... am I wrong?

You're confusing effective resolution with actual resolution.

You don't have 120 lines of chroma resolution in the file you capture. You have 360. THAT is what's getting divded by 4 here.

360 are the samples I get, not the effective chroma resolution... I mean, even at 360 pixel width, we will never get 180 pairs of yellow and red vertical lines, for example, just because... they are not there... we'll get 60 pairs of yellow and red lines three pixel wide each, more or less...

Yes, but that 180 is stretched* over the 360. It's not all in one place. It's not all squished to the left, for instance.

It's more like: [real1] [noise2] [real3] [noise4]... [real359] [noise 360]

(* It's not stretched. It's oversampled. The "holes" inbetween are filled with noise.)