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Posted by Lincoln Spector on 12/06/06 01:27
"Jukka Aho" <jukka.aho@iki.fi> wrote in message
news:%Gadh.95$aW5.76@reader1.news.saunalahti.fi...
> ~consul wrote:
>
>>>>> Okay, I'm shopping right now for HD tvs. I take it your set
>>>>> somehow senses the DVD anamorphic signal?
>
>>>> If everything is configured correctly (no guarantee of that, of
>>>> course), that's pretty standard.
>
>>> How is that done in NTSC/ATSC land? You don't have SCART connectors,
>>> so you can't use SCART pin 8 widescreen signaling. You also can't use
>
>> I get OTA digital HD to my Sharp Aquos, I don't want to pay for cable
>> or sat. Shows that are widescreen come in widescreen, those that come
>> in 4:3, come in regular. The tv changes everything on its own, as
>> broadcasted.
>
> That's understandable for OTA HDTV broadcasts. If the set has a built-in
> ATSC (HDTV) tuner/decoder it can read the aspect ratio flags straight off
> the digital stream.
>
> But what about playing back DVDs (which is what the original question was
> about)? How does the DVD player tell the tv set "this signal is
> full-screen 16:9" or "this signal is full-screen 4:3"?
Part of the DVD signal identifies the program as 4x3 or 16x9. Ever watch
DVDs on a computer in a window (as opposed to full-screen). The window
changes shape when it goes to 16x9.
Whether that information gets to the TV, I'd imagine, depends on what type
of connection you're using. I'm using component video, and it works fine. I
suspect it also works with HDMI and doesn't work with composite video. I
don't know about S-Video.
You also have to tell your DVD player that you have a widescreen TV (there's
a setting in there somewhere). Without telling it that, the player will
convert all 16x9 signals to 4x3, adding letterboxing and reducing the
vertical resolution by 25%.
You also have to tell your TV to handle this change automatically.
Lincoln
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