Re: Video Stabiliser

My 27" Panasonic often fails on MV tapes. It's a full-feature set that's not that old. :>)

Thanks, - Win

Going over 100% white complies with NTSC specs?

But there's some newer versions of Macrovision that dork around with the color/colour burst reference. Elektor had an article on it two or three years ago, and it looked nasty.

Mark Zenier snipped-for-privacy@eskimo.com Washington State resident

If they patented every possible circuit, did that include using a PIC to decode the signal ?

:)

-A

How do you use a PIC to "decode" an analog video signal?

On Fri, 4 Jul 2003 07:35:06 +1000, "DON" put finger to keyboard and composed:

Hey, why single me out. :-(

If you want to build a macrovision killer kit, er I mean video stabiliser, then consider a kit based on the LM1881 sync stripper IC which was published by Silicon Chip magazine not too long ago. I believe Jaycar sells it.

- Franc Zabkar

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Please remove one 's' from my address when replying by email.

"Chris Mann" wrote...

Maybe if the ran 20-50x faster they could be used for video. What's the fastest PIC ADC? High quality video needs ~ 10-15MHz sampling rate

I notice that my posting listing all the patent numbers is no longer on Google's archive. The conspiracy theorist in me says this isn't coincidence.

Anyway, one or more of them described methods that involved digitizing the video signal. So, bad luck (even if a PIC could sample a usable video sigal...).

---------- You don't even NEED a damned PIC.

-Steve

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the

info

handle

Once again, a really USEFUL post by Steve. Why not use your great intellect to be more helpful to people, Steve?

Leonard Caillouet

------------------------------ Look:

-Steve

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With a decent S/H it shouldn't be a problem. I haven't looked at recent PIC devices to even get a good gut feeling whether or not they could do it, but in theory they have the speed and power.

You guys are so complicated... :-)

A pic12508 running on it's internal 4MHz clock + an lm1881 sync separator does the job just fine. There's no need to digitize the video information. You just have to clamp the undesired signals to black level, you do this by counting lines and syncing(sp?) to the vertical sync, this happens at most at

15625Hz for the pal people, slow enough for a pic. With a discrete sync separator and running the pic at 10MHz you could skip the lm1881.

Greetings

You could repost it.

Thanks, - Win

Or for the same price (~$AU60) you could buy Jaycar's Dr Video unit, which works fine for my 1984 Toshiba TV. No assembly needed, and comes with a "video enhancer" button :-). The RF modulator option can work too, but since the one in my Mitsubishi VCR didn't work to play DVDs on the Toshiba, I figured the possible hassle of trying it wasn't worth the saving.