1080 lines question - Blu-ray Forum

quexos · 12-04-2007, 11:58 PM

I was thinking since an HDTV has 1080 horizontal lines and since any film with, say a 2.40:1 ratio will appear with big black stripes at the top and bottom of the screen, how can the film be 1080 ? it's not using all the lines as the lines in the stripes are not used ? Therefore it you are not watching it in 1080 lines, right ?

Am I getting somewhere here ?

DavePS3 · 12-05-2007, 12:21 AM

One of the things anamorphic meant, was that all the lines needed were only in the picture itself and none fed to the black bars so you still are getting 1080p or i by not losing any in the bars. They're all in the picture frame itself. Your display is taking the entire frame black bars included and showing it to you at the same rate like 1080p but all the lines are in the picture itself. That's what I've always heard.

WickyWoo · 12-05-2007, 12:23 AM

When the film is scanned, the canvas is always 16:9

If the film has a wider aspect ratio than 16:9, it is matted against black (the black bars). The image contained on the disc is still 1920x1080

12-04-2007, 11:58 PM	#1
quexos Banned Member since:May 2007 Location:Brussels, Belgium	1080 lines question I was thinking since an HDTV has 1080 horizontal lines and since any film with, say a 2.40:1 ratio will appear with big black stripes at the top and bottom of the screen, how can the film be 1080 ? it's not using all the lines as the lines in the stripes are not used ? Therefore it you are not watching it in 1080 lines, right ? Am I getting somewhere here ?

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12-05-2007, 12:21 AM	#2
DavePS3 Blu-ray Guru Member since:Jan 2007 Location:Toronto Home Theater Gallery:56 Blu-ray reviews:1 Trading Score:1	One of the things anamorphic meant, was that all the lines needed were only in the picture itself and none fed to the black bars so you still are getting 1080p or i by not losing any in the bars. They're all in the picture frame itself. Your display is taking the entire frame black bars included and showing it to you at the same rate like 1080p but all the lines are in the picture itself. That's what I've always heard.

12-05-2007, 12:23 AM	#3
WickyWoo Blu-ray Champion Member since:May 2007 Trading Score:2	When the film is scanned, the canvas is always 16:9 If the film has a wider aspect ratio than 16:9, it is matted against black (the black bars). The image contained on the disc is still 1920x1080

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