<br><br><div><span class="gmail_quote">On 14/01/07, <b class="gmail_sendername">Stroller</b> <<a href="mailto:linux.luser@myrealbox.com">linux.luser@myrealbox.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Although I understand the difference between interlaced & progressive<br>I don't really understand the implications of using each, and what<br>problems may be caused by them. I therefore post this reply in the<br>
hope that someone else can correct my understanding. My comments &<br>remarks should not be taken to be definitive.<br><br><br>On 13 Jan 2007, at 12:32, James Buckley wrote:<br>> ...<br>> My main problem was TV playback. I had my TV set on 'DVI (PC)', and
<br>> the EDID information passed let me get a picture with no overscan<br>> whatsoever. The drawback with this was that it was dropping frames<br>> (badly, don't know why, just TV is unwatchable). TV was jerky,
<br>> (especially the news tickers).<br><br>Is this not the "correct" way (or best way, perhaps?) to feed a TV<br>which accepts such a signal? It's my understanding that such an image<br>will be non-interlaced at full resolution, but that such an image
<br>will also require a lot of pixels–per-second. IE: you're effectively<br>displaying an HD image (good!) and the best way to resolve this is<br>throw more horse-power at the problem.</blockquote><div><br>I haven't change my output to the TV, I just switched the TV into a mode which was designed to be used with video. The consequences however, were that I needed a modeline which worked with my TV (which is what I have)
<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">> Working Modelines: 1280x720p, at 50Hz with a little overscan<br>> ... I've found that I just can't match the quality of TV from my
<br>> freeview STB. I've gone through all the deinterlacing methods, and<br>> the only one that has a decent framerate is BOB. However, I find<br>> that BOB causes some parts of the picture to flicker. Normal scenes
<br>> look fine, but when digital boxes are drawn on the screen (such as<br>> a news ticker), the horizontal edges between the box and the rest<br>> of the picture will flicker slightly. It's a bit hard to explain,
<br>> but is most noticeable when a static picture is displayed. The<br>> whole picture isn't jumping (like when there is a refresh rate<br>> mismatch), just objects which are perfectly horizontal flicker (and
<br>> is bit annoying). I also oversize the picture slightly to get rid<br>> of the top and bottom lines from flickering.<br><br>I think this is the nature of a progressive signal at 50hz.<br><br>I posted these links in another thread <
<a href="http://www.gossamer-">http://www.gossamer-</a><br><a href="http://threads.com/lists/mythtv/users/244889#244889">threads.com/lists/mythtv/users/244889#244889</a>> a week ago:<br> <<a href="http://www.mythtvtalk.com/forum/viewtopic.php">
http://www.mythtvtalk.com/forum/viewtopic.php</a>?<br>p=12424&highlight=#12424><br> <<a href="http://www.hifi-writer.com/he/progscan/progscan.htm">http://www.hifi-writer.com/he/progscan/progscan.htm</a>><br>
<br>Stroller.</blockquote><div><br>Do you mean about the flickering, cause SKY does a pretty good job of giving me a static image, (coupled with my TV's deinterlacing).<br><br>Anyway, thanks for the info so far...<br>
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