It makes a difference on web videos.
3) So now the remaining curiosity is, even when I'm watching live TV on my new HDTV set, some HDTV stations' 16:9 programs appear fullscreen, and other stations' 16:9 programs are small windows within my screen. Ditto with some of the subchannels' 4:3 SDTV broadcasts: some are fullscreen top-to-bottom, others are small windows within my screen. Why is that? And does it have a similar bearing on why I can't get the largest-possible 16:9 window recorded onto my 4:3 Series 2?> What does widescreen (16:9) setting mean?
> Tivo (series 2) has an option to set TV aspect
> ratio to 4:3 (default) or 16:9. I have a 16:9 TV
> and I don't see any change.. Does anyone know what
> difference it makes?
Right, it won't do anything. This setting was provided back when Tivo thought that broadcasters might want to use "anamorphic compression" to provide 16:9 broadcasts, but nobody does it.
This is how I understand the issue.^ Yeah, I can see that. But what I don't understand is, they're just aspect ratios, not absolute dimensions. And actually, it's 16:9 mapped onto 4:3, on a 16:9 screen. The top & bottom black bars are narrower than the left & right black bars, so why can't the slack be taken up and display fullscreen top & bottom, with just a little bit of black bars left & right?