"Cydrome Leader" wrote in message ...
William Sommerwerck wrote:
"Cydrome Leader" wrote in message ...

I've always wondered what that was. I seem to think I've seen that on
laserdiscs, and just checked mine, but none have it, not that I'd be able
to play it back correctly anyways.

The explanation given was almost completely incorrect.

The explanation for SQ was wrong?

Yes. Smarty's explanation is based on a misunderstanding of the Scheiber
patents (which I looked at last night). And while we're at it, neither SQ nor
QS is derived from nor dependent on the Scheiber patents.