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Discussion Starter · #1 ·
I just got my Bravo D1 DVD player and hooked it up to the DVI connection on my Samsung DLP HLN507W. The picture is as good as my HTPC was. I cannot tell any difference. I have noticed a problem though. When I switch the DVD player to 1080i, I can see the image, but its very distorted - like its alternating between two images.


Any suggestions?
 

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I have a Samsung HLN617W and I just got a Momitsu V880 (just like a Bravo D1). I am having the exact problem as Awilki01 when I switch to the DVI output and select 1080i - alternating between two images.


I'll have to check and see if I have a 1" border around the image.


Steve
 

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Discussion Starter · #4 ·
I don't have the 1" border. Go to your TV menu and go to PC(wide) or PC(normal) settings.....I believe that is the two DVI settings on the TV - not in front of the set at the moment and wife is watching it.


One of those setting should get rid of the 1" border.....
 

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Why are you trying to send a 1080i signal to a 720p DLP fixed panel TV?
 

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I have a Sammy 437 and Bravo D1 and 1080i doesn't work for me, either. But I don't care one bit. The TV is 720p native, so that is the signal that will give the best picture. There is no sense in having the Bravo scale to 1080i and then have the Sammy scale it to 720p.


I am not sure I understand the formats well enough to state this with absolute certainty, but I thought 720p was better (more information) than 1080i anyway. 1080i is equivalent to 540p, which isn't as good as 720p.


-Max
 

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Quote:
I have a Sammy 437 and Bravo D1 and 1080i doesn't work for me, either. But I don't care one bit. The TV is 720p native, so that is the signal that will give the best picture. There is no sense in having the Bravo scale to 1080i and then have the Sammy scale it to 720p.
Absolutely correct.
Quote:
I am not sure I understand the formats well enough to state this with absolute certainty, but I thought 720p was better (more information) than 1080i anyway. 1080i is equivalent to 540p, which isn't as good as 720p.
A progressive signal draws all the lines of resolution in a single pass. An interlaced signal draws all the odd lines then all the even lines in succession. A 1080i signal has more information (1080 lines) however it takes 2 passes. 720p draws all lines in succession. It is generally assumed that for relatively static pictures, 1080i will give a better picture whereas for fast moving pictures, the 720p will give a better picture. 1080i and 540p is not the same thing.

Do the pixel math for 16x9 displays:

1920x1080i = 2,073,600 pixels in 2 passes

1280x720p = 921,600 pixels in 1 pass

960x540p = 518,400 pixels in 1 pass

The confusion regarding 1080i comes because in a single pass, 540 lines are drawn.
 

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Originally posted by rbmcgee
Do the pixel math for 16x9 displays:

1920x1080i = 2,073,600 pixels in 2 passes

1280x720p = 921,600 pixels in 1 pass

960x540p = 518,400 pixels in 1 pass

The confusion regarding 1080i comes because in a single pass, 540 lines are drawn.
Unfortunatly in practice this is not the case. 1920x1080i is considered a "Bandwidth Hog" and the signal won't fit into a 6MHz channel without being compressed to the point where artifacts become obvious. For this reason, 1920x1080i is typically subsampled to 1440x1080i making the more accurate calculation:


1440x1080i = 1,555,200 pixels / frame

1280x720 = 1,843,200 pixels / frame
 

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Supertoys,


What you're referring to is the ability of the display/setup to resolve a full 1920x1080 signal. I agree, most can't, but some can.


Stevie, 1080i is NOT 540p, regardless of a given display's ability to resolve the full resolution.
 

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Originally posted by rbmcgee
Supertoys,


What you're referring to is the ability of the display/setup to resolve a full 1920x1080 signal. I agree, most can't, but some can.


Stevie, 1080i is NOT 540p, regardless of a given display's ability to resolve the full resolution.
No, I'm referring to the signal being transmitted........due to bandwidth limitations very few 1080i programs are actually sent at the full 1920x1080i resolution. They are typically subsampled and sent at 1440x1080i
 

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An HTPC can send a true 1920x1080i signal and a G90 can fully resolve it.
 

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Quote:
Originally posted by rbmcgee
An HTPC can send a true 1920x1080i signal and a G90 can fully resolve it.
True, but I thought we were talking about what most people watch most of the time.......so tell me what "programming" you can receive via cable, satellite or antenna that's broadcast at 1920x1080i
 

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Just got my new D1 and Sammy HLN437W. I'm sure this is a stupid question, but . . . I got rid of the 1" border on 720p, yet still have the 4" borders on the top and bottom while watching widescreen DVDs (like The Twin Towers). Is there any way to fill my 16:9 screen with these movies other than using the first zoom setting on the D1 which results in loss of some of the side picture?
 

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Darrel, the black bars are because the original aspect ratio of the two towers and other movies are made for a theater and not a 16x9 screen like in your living room. These theater screens are 1.85 instead of 1.77 that is why the black bars are there.
 

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Darrel, the black bars are because the original aspect ratio of the two towers and other movies are made for a theater and not a 16x9 screen like in your living room. These theater screens are 1.85 instead of 1.77 that is why the black bars are there.
Or 2.35:1, which is what Fellowship ... and The Two Towers are. 1.85:1 movies will show only very tiny black bars at the top and bottom, if at all (display overscan depending.)


Rick
 
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