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Originally Posted by FLEXKILL The only way that will occur is due to the fact that because of space limitations w/ current DVD format you can only get a maximum of 480p HI-Def. resolution for a full length movie (This is barely HI-Def!). If you were to compare that to the same pixel resolution on a HD-DVD or a Blu-ray disc, there would be no difference in picture quality strictly dependent on the type of disc. That is only determined by picture format (480i/480p/720p/1080i...) |
Reality is, you can store more on current generation DVD's if we wanted to. We can even store 720i/720p or higher. The reason for the limitation to 480i/p on current generation systems is becouse we still use mpeg2. With a codec like h.264 thats going to be use on the next generation dvd's, if you apply it to current generation DVD-9's, it has no problem storing the movie.
Lots of space is in reality wasted on DVD-9. Movies are maybe 7GB of the 8.5GB limit. The rest is junk in most cases. Now, if you take h.264 or divx or xvid. They have about a 1/4 a 1/5 improved compression ratio vs mpeg2. Now, 480 -> 720 is a 4 fold increase in resolution. So you can widout any problem get those 720 movies on there.
Why dont the movie companys do it. Easy. Becouse of the mass availability of DVD writer, and the lack of copy protection. If you move to a new dvd format, one where there are almost no writer available, people cant copy them. Combine that with increased security by hardware security systems, plop sais the weasel
MS showed a year or 2 ago, that it was already possible to show 720i/p movies using WMV on current generation DVD-9's. And h.264 is a more advanced codec then the WMV from when they did the tests.
I know its a bit offtopic, but i liked to point this out becouse people mistakenly think that you need 15 or 25GB for 720i/p movies. You dont. You need it for 1080i/p. But, 720i/p has already hit a sweet spot. The difference in image quality is not so easy to spot between 720i/p & 1080i/p, even more when your a few feet away from your TV.
Here is some old date from the h.264 beta 3 discussion how much h.264 kan hold:
H264/WMV9 720p ~ 5 MBps
DVD5: 120 min
DVD9: 220 min
H264/WMV9 1080p ~ 9 MBps
DVD5: 70 min
DVD9: 130 min
Hope people find it intresting. Most games can also be shipped on 1 dvd. Seen several games if they stripped out the demo and other advertisment what is not gamerelated, that the game can fit on 1 dvd. Dvd's are cheap these days, so they dont bother to much anymore with getting it on one dvd.
The same apply's to the xbox360 games.