Even though NTSC DVDs had a frame rate of 30fps (I know it's actually 29.97fps), film content could be encoded at 24 fps which was beneficial for displaying it in progressive scan and also improving picture quality by not including unnecessary repeated frames. Even though the NTSC television refresh rate was 60 hz the DVDs encoded at 24fps displayed on progressive scan television would be converted to 60p instead of 60i. Please correct me if any of that is wrong. But PAL content which is shot at 25fps could not be encoded on NTSC DVDs at 25fps and there for had to be converted before hand which meant that 25p would have been converted to 60i and therefore we could never play 25p video (converted to 60p). Again correct me if any of that is wrong.
My question is if this is still a barrier for Blu-ray. Does (for example) UK content - whether HD or SD - need to be converted to 60i before it can be encoded onto a disc meant to be played in the US? Or can something shot at 25p be encoded as 25p on US Blu-ray and be converted to the proper frame rate by and standard Blu-ray player. BTW, what is the Blu-ray equivalent for NTSC. Is it ATSC or does that refer only to the broadcast standard? I hope I didn't sound too ignorant.
