Quantcast KDVD: Explain Overscan - digitalFAQ.com Forums [Archives]
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09-17-2005, 08:05 AM
supermule supermule is offline
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Can someone explain overscan in detail/point to a guide. Okay from what I know, its the left and right edges on the screen, analogue devices are effected, digital are not......thats all good, but I have few questions :

- When used, what does it do to the source picture, does it squeeze/expand the left/right edges.

- Is it recommended to use Overscan for playbacks on Digital devices (LCD, plasma).

- any examples with pictures ??? for understanding.
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  #2  
09-17-2005, 09:02 AM
rds_correia rds_correia is offline
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Hi supermule,
If you encode a movie with overscan enabled then you will see the whole encoded image on an analogue device but you will see black bar on the right/left edges of the screen if you play it on a digital device.
So if you plan on playing your encodes on a digital device I would advise you to encode without overscan.
Overscan can be done in one of two ways: resized overscan or overlaped overscan.
resized overscan - You never loose a single pixel of your movie but you will have taller black bars on top and on bottom plus the left/right 8/16/24 pixels. In such case, use your TV functions to zoom the image on screen so that it covers the left/right black bars.
overlaped overscan - You always loose 8/16/24 pixels of your movie on the left/right borders but you don't need to use your TV's zoom feature to get rid of the black borders.
Choose the one you like the most.
I hope I didn't forget of mentioning anything
Cheers
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09-17-2005, 10:00 AM
supermule supermule is offline
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Quote:
Originally Posted by rds_correia
Hi supermule,
If you encode a movie with overscan enabled then you will see the whole encoded image on an analogue device but you will see black bar on the right/left edges of the screen if you play it on a digital device.
So if you plan on playing your encodes on a digital device I would advise you to encode without overscan.
Overscan can be done in one of two ways: resized overscan or overlaped overscan.
resized overscan - You never loose a single pixel of your movie but you will have taller black bars on top and on bottom plus the left/right 8/16/24 pixels. In such case, use your TV functions to zoom the image on screen so that it covers the left/right black bars.
overlaped overscan - You always loose 8/16/24 pixels of your movie on the left/right borders but you don't need to use your TV's zoom feature to get rid of the black borders.
Choose the one you like the most.
I hope I didn't forget of mentioning anything
Cheers
Thanks,

Got it loud and clear rds.
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09-17-2005, 10:35 AM
incredible incredible is offline
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Send a message via ICQ to incredible
http://www.incredible.de.tf/aspectratios.html
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09-17-2005, 10:38 AM
rds_correia rds_correia is offline
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Damn!!
I completely forgot that Andrej has it clearly explained at his webpages.
Thanks Andrej
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12-23-2006, 03:42 PM
Gre1 Gre1 is offline
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thanxs for this cuz i am rusty on this stuff and i was wonderin why i was gettin the borders around the movie on the sides
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