Thread: TiVo TiVo Picture Quality
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Old 11-05-2011, 16:08   #260
Lew
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Re: TiVo Picture Quality

Quote:
Originally Posted by Perfect Choice View Post
Sorry too technical to me, is that a signal feed issue or a software in the box issue if that is the cause of course!
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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