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Does Overscan make a mockery of "Full HD 1080" ?

post #1 of 3
8/23/10 at 8:36am
Thread Starter 

Hi Folks,

 

I am very much into HD video... both commercial movies and HD video that I produce myself...

 

So far I have tested both Sony and Panasonic Blu-ray disc players and found them to have Overscan.... even when connected with HDMI cable....

 

I could understand reasons for overscan using analog interfaces..... but why would anyone want overscan in an end-to-end DIGITAL system ?????

 

Consumers are purchasing HDTV's with "Full" 1920 x 1080 native resolution.....  surely after pixels have been "lost" to Overscan.... and the remaining pixels "replicated" to fill the screen..... there is no longer a ONE-TO-ONE relationship between individual pixels in an HD frame and the pixels on your display.

 

Can the technical crew elaborate on this...  and offer some suggestions ???

 

Thanks,

Stephen Mendes

 

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post #2 of 3
8/30/10 at 11:23pm

Stephen-

Welcome to Home Theater Forum.  This is a question that is better suited for our video area, so I am going to move it there.

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post #3 of 3
8/31/10 at 12:57am

Overscan is generally a product of the display, not the player. Most displays should have some 1:1 pixel mode, but this is rarely the default.

 

That said, overscan isn't necessarily bad, and home video has just never existed in a state where 1:1 image mapping is often practical.

 

Not long ago the vast majority of HD displays sold were 720p, and soon our displays will commonly feature resolutions larger than 1920x1080-- while content will remain 1080p. The added display pixels make for a smoother image. This is exactly the relationship we have in digital theaters today, most of which now project at 4k, but they're projecting 1080p images. 

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