VHS restoration, white scrolling noise

[artie_be]

for so far i have restored about 9 old vhs tapes successfully with the help of virtualdub and some great noise filters. Today I captured another tape and have a strange noise in it, anyone any idea what kind of noise this is and what filter I can use to make the best of it.

the noise are some sort of white lines scrolling verticaly, somtimes they stay at the same possition. The picture shows it clearly.

[lordsmurf]

I see lots of chroma noise. (That red/blue haze covering your image.)

This is the reason I suggest folks use LSI Logic chipset machines for converting VHS, as LSI chipsets remove chroma noise. No other hardware does as well as LSI does.

A better VCR would also help, and many of the more advanced ones (like the JVC 7000/9000/SR series machines) have a DNR system that will remove most of this too.

There are some VirtualDub chroma noise removal filters, but understand clearly that these are very inferior to analog processing methods (good VCR, LSI chipset recorder). The VirtualDub chroma removal filters will still leave some behind, and it is heavily temporal based, so you may get chroma ghosting. It's better than nothing, but understand it's not the best option for removing chroma noise.

I hate chroma noise. It's the bane of tape-based analog video.

Aside from chroma noise, I see nothing else. There is the overscan visible in that image, of course, but that's not an error, it's supposed to be there.

Good luck.

[davideck]

The scrolling white lines look like some type of AC hum interference. If other tapes play fine on the same setup, then this interference is most likely embedded into the recording. OTOH, if they continue to scroll while the VCR is in still frame, then it may be a bad cable or something else in your setup.

If they are embedded, then I doubt that a different VCR will make much difference. DNR processing might actually make these lines appear more pronounced.