Quote:
Do HDTV signals generally assume there is overscan or, since it's a very specific digital resolution, should TVs be displaying all of the pixels as sent to them?


Overscan comes from the age of CRTs with less than straight edges when people were also sticking all sorts of junk in the VBI. Most broadcasters leave 5 or 10% as an 'unsafe area' around the edge of the screen to deal with various levels of overscan. With a digital picture you should assume all the active picture is visible.

My main LCD at home exhibits almost no overscan on DTT and none on the HDMI inputs.
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Cheers,

Andy M