HD does not use full screen

Go to menu, options, TV Screen Resolution, and set it to 720p

You should set the aspect ratio/resolution setting to the native resolution of the TV, whatever that is (720p or 1080i).

But the important thing is to not leave it down at 480i when your TV supports better!

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@JefferMC wrote:

You should set the aspect ratio/resolution setting to the native resolution of the TV, whatever that is (720p or 1080i).

 

But the important thing is to not leave it down at 480i when your TV supports better!

 

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I have now been given two opposite pieces of advise for setting my 52 inch 1080p television. Should I keep the setting as is on 1080i as JefferMC recommended or move it to 720p as rdljr recommends?

If the setting needs to be changed, then why does U-verse have a setting for 1080i for 1080p receivers?

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Let's look at what happens with each setting for HD content.

Example 1:

Incoming Content is 720p

TV is 720p capable

Receiver is set for 720p.

The Receiver receives 720p content, sees that it needs to send 720p content and does no scaling.  The TV gets its native resolution and can display it without scaling.  Everyone is happy.

Example 2:

Incoming Content is 1080i

TV is 1080p capable

Receiver is set for 1080i.

The Receiver receives 1080i content, sees that it needs to send 1080i content and does no scaling.  The TV receives the interlaced 1080 content, and knows how to display it without scaling (though it does have do interpolation betwen the two interlaced frames).

Example 3:

Incoming Content is 720p

TV is 1080p capable

Reciever is set for 720p

The Receiver receives 720p content, sees that it needs to send 720p content and does no scaling.  The TV gets 720 resolution content and can scale it to 1080.

Example 4:

Incoming Content is 1080i

TV is 720p capable

Reciever is set for 720p

The Receiver receives 1080i content, sees that it needs to send 720p content and rescales it down to 720p. The TV gets its native resolution and can display it without scaling.

Example 5:

Incoming Content is 720p

TV is 1080p capable

Receiver is set for 1080i

The Receiver receives 720p content, sees that it needs to send 1080i content and rescales it up to 1080. The TV receives the interlaced 1080 content, and knows how to display it without scaling (though it does have do interpolation betwen the two interlaced frames).

Example 6:

Incoming Content is 1080i

TV is 1080p capable

Receiver is set for 720p

The Receiver receives 1080i content, sees that it needs to send 720p content and rescales it down to 720p. The TV gets 720p and now needs to scale it back up to 1080.

The scaler in the Set Top is pretty good, though modern TVs are likely as good or better.  But still, scaling down from 1080 to 720 will result in information loss that cannot be recovered when going back from 720 to 1080.

Yes, moving from 720p to 1080i will "throw out half the picture" each frame, but there's a lot more information to properly reconstruct the missing information.

If you have a 720p set, the answer is cut and dried.

If you have a 1080 set, then you will hear those who say that the tradeoff of having 1080i content be rescaled to 720p and back to 1080 is worth it to allow the TV to get 720p and have let the TV scale it.  I am not in that camp.

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@rdljr wrote:
I would change it to 720p because it creates a clearer picture because there is no interlacing. LCD tvs can't accept interlaced, so the tv scales the picture to 1080p or 720p anyway.

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What are you smoking?  Every TV for the last 10 years or so is a progressive scan and users should set it to1080i if they have a 1080p HD TV. 

If they set it to 720p, now the 1080p TV has to rescale the image to 1080p.  Might have already been rescaled by the Uverse unit from 1080i to 720p.   So 2 recalings could occur possible picture problems.

If their particular TV does not have a great rescaler, the image might look worse on 720p than 1080i.  Know on my Panasonic plasma, they look the same as it has a great rescaler,but leave it on 1080i.

Chris
__________________________________________________________

Please NO SD stretch-o-vision or 480 SD HD Channels
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I have always left my Sonys on 720p and they've been great.

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@rdljr wrote:

I have always left my Sonys on 720p and they've been great.

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Think @JefferMC showed why that's not the thing to do for 1080p TVs (did not 'see' his post b4 I wrote mine).  You're causing double rescaling most of the time, since 1080i channels are much more prevalent. 😉

Chris
__________________________________________________________

Please NO SD stretch-o-vision or 480 SD HD Channels
Need Help? PM ATT Uverse Care (all service problems)
ATT Customer Care(billing and all other problems)
Your Results May Vary, In My Humble Opinion
I Call It Like I See It, Simply a U-verse user, nothing more