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Pixel Mapping / Scaler bypass
simonsse
16-12-2009
Displaying 1920x1080i on a full HD screen I should be qble to get a 1:1 pixel map from HDMI in to display panel surely? My new Sony seems to insist on adding (excessive) overscan, even in 1080i input.

Any idea on how to avoid this?
Nigel Goodwin
16-12-2009
Originally Posted by simonsse:
“Displaying 1920x1080i on a full HD screen I should be qble to get a 1:1 pixel map from HDMI in to display panel surely? My new Sony seems to insist on adding (excessive) overscan, even in 1080i input.

Any idea on how to avoid this?”

It's how it's supposed to be, the picture is transmitted intended for slight overscan - try looking at the BBC testcard when it's on the BBC HD Preview.

Some sets have a customer setting allowing direct pixel mapping, if your's doesn't then you can't do anything about it - but to be honest, it causes more complaints than not having it switched ON.
soulboy77
16-12-2009
Have you set the Display Area setting to 'Full Pixel'? It looks like you have it on the Sony default 'Normal' setting.
bobcar
16-12-2009
Unless the original source was progressive (eg film) and the TV can detect this then there is no way to have 1:1 pixel mapping on 1080i and even then there will often be image processing that will mean no 1:1 mapping. Genuine 1:1 mapping on an interlaced source would look horrendous when any sort of movement occurred.

Some TVs will let you eliminate overscan on 1080i but that is not the same thing as 1:1 mapping. (720p on a 1280x720 TV can of course use 1:1 mapping).
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