Quote:
Originally Posted by Lew
OK. When a TV signal (such as standard SD video) is interlaced, only half the lines of the picture are included in each frame (technically a field, but that'll do for this explanation). On the first frame only the odd lines are scanned, and the second frame has only the even lines (or possibly vice-versa). De-interlacing combines these two images to create a progressive frame (one that contains both the odd and even lines). If it incorrectly detects which lines are which it will display the odd lines where the even lines should be, and the even lines where the odd lines should be. This can result in a problem such as the one shown in the second image in the linked post. As TiVo is providing the de-interlacing and upscaling then it's a software issue.
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Thanks, understand now. Means that if this is an example or one of the causes of PQ then it is fixable at least through software change. That is what I am hoping for, but my SD PQ is not as bad as others and while I still have a difference from what I had before with my SA V+ it is now at a level I can "live with" and hope to see improved over time.