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My Toshiba HD-XA2 1080i vs. 1080p thread.

748 Views 2 Replies 2 Participants Last post by  PRO-630HD
My question is this. Why would the HD-XA2 at 1080p/60 not be a considerable improvement over 1080i?

Going back to DVD and doing a little research I discovered DVD never was 480p on the disc as I had thought. It has always been 480i with 3:2 pull down conversion done by the tv or dvd player translating the 24 fps for film to 60 fps for HDTV. All I know is this there is a massive difference going from my 16:9 analog pioneer set at 480i compared to 480p on my elite hdtv set with the pure cinema 3:2 pulldown being done in the dvd player or the tv. Either way it looks far superior as the dvd player converts the signal from 60i to 60p.

Since going from 1080i to 1080p is a similiar shift wouldn't the results be similiar? I know the argument has been 1080i 60fps compared to 1080p 24fps will show little difference. My question is what display will be running at 24p? The new Pioneer 1080p plasma set for example runs at 1080p 72fps. It has 3:3 pull down. Their BDP-HD1 outputs the signal at 24p or 60p, but it gets upconverted by the tv to 72p anyway. The Toshiba will be doing the same thing as it outputs at 60p from 60i.

Shouldn't the 60p source if progressively scanned well show a big difference in PQ as we saw with 480i to 480p?
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The answer is no.

"At this point we should address what can only be characterized as a hoax—the notion that Blu-ray must be technically superior to HD-DVD because the Samsung player outputs 1080p, whereas the Toshiba player is "only 1080i." One high-end home theater retailer told me last weekend that the reason you pay $1000 for the Blu-ray player is for the "higher resolution 1080p output." This is absolute baloney. If you encounter any retail sales rep feeding you this line, keep your wallet in your pocket and leave the store.

The truth is this: The Toshiba HD-DVD player outputs 1080i, and the Samsung Blu-ray player outputs both 1080i and 1080p. What they fail to mention is that it makes absolutely no difference which transmission format you use—feeding 1080i or 1080p into your projector or HDTV will give you the exact same picture. Why? Both disc formats encode film material in progressive scan 1080p at 24 frames per second. It does not matter whether you output this data in 1080i or 1080p since all 1080 lines of information on the disc are fed into your video display either way. The only difference is the order in which they are transmitted. If they are fed in progressive order (1080p), the video display will process them in that order. If they are fed in interlaced format (1080i), the video display simply reassembles them into their original progressive scan order. Either way all 1080 lines per frame that are on the disc make it into the projector or TV. The fact is, if you happen to have the Samsung Blu-ray player and a video display that takes both 1080i and 1080p, you can switch the player back and forth between 1080i and 1080p output and see absolutely no difference in the picture. So this notion that the Blu-ray player is worth more money due to 1080p output is nonsense."
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Good article, thanks Robert. It sounds as if the display device they are referring to is 1080p. If they are fed in interlaced format (1080i), the video display simply reassembles them into their original progressive scan order. So I guess this might evolve into a 1080p display versus 1080i display discussion.
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