Vertical low pass filter for telecining

[90sTV]

While looking at an old cartoon series I ordered on DVD that clearly was transferred from some sort of video tape (some noticeable dropouts and dimming/color change), I've been wondering about when a low-pass filter is applied. As I understand it, video cameras would have low-pass filters built in to prevent twitter on interlaced displays...but what happens with something that was telecined (as cartoons were)?

The thing is, despite the signs of aged tape that are impossible not to notice, the picture seems to have pretty good resolution to me, to where I'm wondering if the perceived resolution is actually somehow better on this DVD set than it was on broadcast back in the day on a CRT, despite the fact that it's clearly deinterlaced SD. But that doesn't seem likely to me as I would think the content was already blurred on the original source (tapes).

[jagabo]

Look closely at high contrast vertical edges. Do you see oversharpening halos?

[90sTV]

Not as far as I can tell.

The main thing I'm curious about is at what point they would add the filter/blur to the video so that twitter is prevented when the signal is sent to people's CRTs. Since it's obvious this DVD set for the cartoon series wasn't from a film transfer based on the obvious videotape artifacts, I'm wondering if it's possible that it could still be sharper than broadcast quality because it was from a videotape set that wasn't blurred yet.

[jagabo]

A good DVD is sharper than studio video tape. Studio tape is sharper than broadcast quality. Broadcast quality is sharper than VHS. Upload a sample. You can use a program like Mpg2Cut2 or DgIndex to trim out a small section (without reencoding it).

[Brad]

Eh, jagabo? For vertical resolution they should all be equivalent I thought.

[jagabo]

Yes, for vertical resolution they should all be the same.