List of 1080i and Lossy Australian Blu-Rays

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Originally Posted by Armchair NZ

n00b question. I know 1080i is worse than 1080p. Why? What's the difference between them? Is it noticeable while watching a movie?

If a film is filmed at 24 frames per second and then encoded at 25fps (on Blu-ray that's done by 1080/50i which is 50 frames per second displaying half the information at a time) the end result is that the film runs 4% faster and can (depending on whether or not the studio fixes the pitch) result in a pitch increase of 4%.

This goes into plenty of detail: http://www.michaeldvd.com.au/article...palspeedup.asp

Apart from not representing the film the way it's intended for those of us with quite picky ears it can be incredibly distracting because every bit of the soundtrack is wrong. With 12 notes in a scale that means each note is 8.33% apart so with a pitch increase of 4% everything is now not a "real" note. The end result is anyone with perfect pitch will pull their hair out as they're forced to listen to the soundtrack.

Between that and the jitter caused by the incompatible framerates I was a very early adopter of importing DVDs from NTSC countries etc for their correctly pitched audio and complementary frame rates.