how come you can always tell when something is interlaced on a computer but not on TV

D

dv416

Well-known member
seems most TV shows are broadcast 1080i, or 480i. when watching them on TV though, you can never tell theyre interlaced. bring that footage onto a computer and all of a sudden the interlacing is plain as day.

is it the result of playing interlaced footage on a progressive device?
 
All TVs are either interlaced by nature (CRT, ALiS plasma) or have built-in deinterlacers (plasma, LCD, OLED). Most software players blend fields and have no manual control of deinterlacing. Better players/codecs like CoreAVC have manual controls.
 
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The fields are alternated on the screen to give the perception of 60 Frames per second, and because of that constant movement the Eye doesn't focus on the tiny details.

If you look really closely on a Tube TV, you can see some of the interlace "comb" shape on moving objects.

But a Interlaced TV moves very quickly, and most people don't notice the details since they don't sit 3 inches away from a TV :)
 
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