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Topic: LCD TV + Letterman = Background Lights Blink on Camera Move? (Read 1849 times)
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Sunbury
Terracotta Army
Posts: 216
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So I hooked up a 32-in 1080i LCD TV to my cable DVR via the component connections. The DVR outputs both standard def (4:3) on most channels, and HD (16:9) on 40 or so.
Watching a 'tape' of Letterman on standard def, in 4:3 mode (I have to manually switch the TV to 4:3 vs 16:9 since I hate 'stretchy' mode, and it does not auto-detect), during the monolog, whenever the camera moves slightly left or right, the tiny lights on the set behind him go dim, then after a moment, they go back to normal brightness.
I had this same set at my old house (haven't used it in 1.5 years after a move), but I don't recall seeing this effect.
Is it something to do with the LCD TV, or with the HD -> SD (at cable company) -> component?
I haven't looked at it yet on HD.
I've never notice this dimming effect before on other stations.
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Trippy
Administrator
Posts: 23657
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Can you transfer the video from your DVR to your computer and view it on there?
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Sunbury
Terracotta Army
Posts: 216
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I have the same model DVR connected to 3 other TV's (2 old rear projection big screens, old old, before HD was around) and a regular non HD TV and have never witnessed the point of light dimming effect. So I'm guessing it the LCD TV.
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Polysorbate80
Terracotta Army
Posts: 2044
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Scaling artifact, most likely.
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“Why the fuck would you ... ?” is like 80% of the conversation with Poly — Chimpy
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Broughden
Terracotta Army
Posts: 3232
I put the 'shill' in 'cockmonkey'.
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Uhm Im not an electronics component guru, so Im asking...but connecting components to a 1080i LCD TV via component connections (you mean the yellow, red and white connector?) means you arent actually getting any of the available picture quality are you? If you arent using HDMI or other digital connection? http://en.wikipedia.org/wiki/Component_video |
The wave of the Reagan coalition has shattered on the rocky shore of Bush's incompetence. - Abagadro
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Trippy
Administrator
Posts: 23657
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"Yellow, red, and white" is composite, not component.
Component can carry 1080i as the Wikipedia article you linked says.
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Sunbury
Terracotta Army
Posts: 216
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The DVR has HDMI out also, but the LCD TV only has DVI, which I read is signal compatable (without sound) but I'd need an adapter cable.
I searched around the internet, and 'people say' that the component connection (5 wire - 2 for sound, and 3 for video (Y, Pb, Pr)) carries HD just as well as HDMI, except you have 5 wires to 'look at and mess with' rather than one.
HD looks great, so I'm sure its working.
I still have to check out Letterman on HD to see if it has the same effect.
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Broughden
Terracotta Army
Posts: 3232
I put the 'shill' in 'cockmonkey'.
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"Yellow, red, and white" is composite, not component.
Component can carry 1080i as the Wikipedia article you linked says.
Like I said Im not an expert on that stuff. I feel lucky I hooked up all the stuff my wife bought me for Christmas with out electrocuting myself or causing the house to burn down. My biggest moment was routing the cables along the back of the entertainment center in order to hide all the speaker wires and such. |
The wave of the Reagan coalition has shattered on the rocky shore of Bush's incompetence. - Abagadro
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Sunbury
Terracotta Army
Posts: 216
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Update - so I looked at Letterman in HD / 1080i in 16:9 format.
It still has that same effect, but to a lesser extent.
The tiny lights in the set background seem to fade when the camera pans, and then brighten back when it stops.
The larger lights on the model bridge don't have this effect.
It must be related to how LCD TVs work, or at least this model.
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Trippy
Administrator
Posts: 23657
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If your TV is set to overscan try it with it off (e.g. set it to "Full pixel" mode). Could just be a poor deinterlacer, though.
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