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Author Topic: New Lcd Tv With Ycbcr & Ypbpr Connections  (Read 88 times)

kayden1911

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New Lcd Tv With Ycbcr & Ypbpr Connections
« on: March 02, 2005, 03:00:00 PM »

I just picked up an LCD TV/Monitor ... Viewsonic 2750W ...

http://www.viewsonic.com/pdf/us_eng/products/LR_N2750w.pdf

The TV has both a YCbCr & YPbPr component input ... I bought a set of HD component cables off Ebay a while back and tried connecting to the TV.  The XBox works great on both (when booting to a DVD game), but I can't get evox to load on the YCbCr connection.  

Is there some setting I need to change?  The XBox title screen comes up, but as soon as it goes past the XBox logo, I get a blank screen.

Everything seems to work fine in the YPbPr component input.

To my limited understanding YCbCr (Digital) is better than YPbPr (Analog).

Any info would be appreciated.

Thanks!
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Mr Ed

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #1 on: March 02, 2005, 03:42:00 PM »

unsure.gif
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project722

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #2 on: March 03, 2005, 01:56:00 PM »

Y/Cr/Cb is not digital, it just uses a different color model.  Any NTSC 480i/p signal running over a component connection is most likely Y/Cr/CB, since Y/Cr/Cb is only used for SD component signals. The reason I say most likely is that Y/Pr/Pb can also carry 480i/p, but is mainly reserved for HD. So it may be something you need to change in the MS dash, or your tv.

QUOTE
Mr Ed     Posted Yesterday, 10:48 PM
     The XBOX doesn't output YCbCr . I don't know why you thought it did. unsure.gif

Are you sure about that? That would mean 480i/p from the xbox is in Y/Pr/Pb.

This post has been edited by project722: Mar 3 2005, 09:57 PM
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Mr Ed

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #3 on: March 03, 2005, 02:58:00 PM »

The XBOX outputs Y/Pb/Pr which is the most common format for a 3 connector component signal.  It's analog...and it supports HD modes.
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project722

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #4 on: March 03, 2005, 04:08:00 PM »

QUOTE
Mr Ed     Posted Today, 09:28 PM
     The XBOX outputs Y/Pb/Pr which is the most common format for a 3 connector component signal. It's analog...and it supports HD modes.


Most common? Y/Pr/Pb is not the most common format. It depends on the resolution being output. A 480 line component signal is normally Y/Cr/Cb and anything higher is usually output as Y/Pr/Pb, as color represention is different for the two. Do you have any solid documentation on the type component signals output by the xbox? Specifically
a 480 line res being sent over component as Y/Pr/Pb? I know it CAN be done, its not normally how it works though.
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Mr Ed

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #5 on: March 03, 2005, 04:35:00 PM »

QUOTE(project722 @ Mar 3 2005, 02:38 PM)
Most common? Y/Pr/Pb is not the most common format. It depends on the resolution being output. A 480 line component signal is normally Y/Cr/Cb and anything higher is usually output as Y/Pr/Pb, as color represention is different for the two. Do you have any solid documentation on the type component signals output by the xbox? Specifically
a 480 line res being sent over component as Y/Pr/Pb? I know it CAN be done, its not normally how it works though.
*



What do you define as common??

Go to Best Buy, or Circuit City.  Climb behind their HDTV displays.  See what the 3 component input connectors are identified as on the back of all the HDTVs.  They should all say Y/Pb/Pr.  I would argue that means it's more common.

Since the XBOX can send both 480i and 480p as well as 720p and 1080i over its component connectors, then it's a Y/Pb/Pr connection.

This post has been edited by Mr Ed: Mar 4 2005, 12:46 AM
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Mr Ed

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #6 on: March 03, 2005, 04:09:00 PM »

Since it's obvious you won't take my word for anything, even though it's obvious I have a lot more experience with HDTVs than you and am a LOT more familiar with the technology as you keep posting erroneous and misleading things, you can read for yourself here:

http://www.avsforum........ vs Y/Pb/Pr

And here

http://www.hometheat...deo-9-2000.html

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project722

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #7 on: March 03, 2005, 06:58:00 PM »

Well heaven forbid I disagree with a moderator. Being a "head moderator" with 4K plus posts does not make you a damn expert. The first link you posted proved absolutly nothing, except that more people seem to disagree over the two formats, and no one really knows. One poster seems to be quite knowledgable, but does not disprove what I am saying OR verify your staements. Your second link regarding mpeg 2 streams and how it relates to component signals is totally different than what I am talking about. But it actually backs up what I have been saying all along:

"BT.601 specifies how the signal is transcoded from R'G'B' to Y'Cb'Cr', the digital filters used, sampling rate, and the horizontal resolution.  While NTSC (SDTV) is based on BT.601, HDTV is based on BT.709."

However you can search and search all day online, in forums, whatever...and you will still find even the experts arguing over SD component and HD component.

What scares me is that you seem to be basing your "infinite wisdom" on what inputs a tv has at circuit city. Of course all HDTV's component jacks will say Y/Pr/Pb..because that is the component format required for HD. But that does not make it the most common form of component video. Maybe you think you know the all facts and have all these people believing you just because you have a high post count, or because your a moderator. I dont think you do. But heres some more food for thought:

http://www.dtvforum....x.php/t583.html

and

http://www.dtvforum.....php/t1985.html

Make of it what you will.



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Mr Ed

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New Lcd Tv With Ycbcr & Ypbpr Connections
« Reply #8 on: March 03, 2005, 11:24:00 PM »

First of all, yes I'm a mod.  I could delete your posts, edit your messages, etc.  Have I done anything to you that makes you feel I treated you differently because I'm a mod?  

I don't think that's an issue.  I do have a question...what country are you from?  Maybe that's why we see things differently.  In the US, while component video *did* exist in the consumer space before HDTV, it wasn't common at all.  Now, in broadcast that's diff, but that doesn't apply here.  Maybe in the UK and Europe component was more common.  If that's where you are from I'd understand then.  

My other question might be...are you on the broadcast side of things?  Obviously what's common in broadcast is different than consumer.  I'm only talking about consumer stuff, although I have some experience with broadcast.  Obvious diff between connections is professional equipment uses BNC connectors instead of RCA connectors for component video which consumer stuff tends to use.  I am aware that component video connections Y/Cr/Cb have been common for a while in the professional equipment.  Maybe that's where our discussion is not making sense.  I'm talking consumer, your talking pro/broadcast.  Anyway...

Component didn't start appearing a whole lot in consumer devices until HDTV. As you've already agreed with me, that's Y/Pb/Pr.

I don't even know what you are arguing about now, as it seems you are agreeing with me.

And for the record, my title on this site and my post count don't make me an expert.  If you asked me about softmodding an XBOX I would tell you to find someone who knows more.  However, I am an expert in HDTV as well as many other things XBOX related and non-XBOX related.  

And lastly as we are talking about consumer video, I don't know how else you would attempt to determine the most common connection type except by sampling a cross section of TVs at a common consumer outlet which you seem to feel is flawed logic. :blink:

This post has been edited by Mr Ed: Mar 4 2005, 07:31 AM
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