How can the 360 produce HD on a DVD?

this is not sarcasm or anything and im new to HD

so im asking is that how can the 360 produce hd visuals for games like 720p on a dvd? if dvd can have HD then why the HD-dvd and Blu-ray war? just for size?

this is not sarcasm or anything and im new to HD

so im asking is that how can the 360 produce hd visuals for games like 720p on a dvd? if dvd can have HD then why the HD-dvd and Blu-ray war? just for size?

kirk4ever

remember, the 360 uses DVD9, not regular DVDs, a DVD has about 4.7 gigs of ispace while a DVD9 has about 8.5 gigs of space

[QUOTE="st1ka"][QUOTE="kirk4ever"]

this is not sarcasm or anything and im new to HD

so im asking is that how can the 360 produce hd visuals for games like 720p on a dvd? if dvd can have HD then why the HD-dvd and Blu-ray war? just for size?

AmyMizuno

remember, the 360 uses DVD9, not regular DVDs, a DVD has about 4.7 gigs of ispace while a DVD9 has about 8.5 gigs of space

huh... i had no idea, thanks for the info

The difference is that video is pre-recorded pictures, and 3D graphics are built by the computer as the game is played.

In a video, all it is is premade pictures displayed one after the other. The more pixels in each picture, the more space they take up. Therefore, HD video takes up far more space than SD video.

In 3D graphics, all that is stored on the disc is the 3D objects and the instructions for their use. The computer builds the picture itself and displays it on-screen. The number of pixels in the displayed image depends on how the computer builds said image, rather than anything premade. If you had a 3D object that took 2 KB on a disc, and told the computer to render it at Ultra-HD Quailty, it would still be 2 KB on the disc, even if the dispalyed image was UHD.

A bit of an oversimplification, but I hope it was clear.

this is not sarcasm or anything and im new to HD

so im asking is that how can the 360 produce hd visuals for games like 720p on a dvd? if dvd can have HD then why the HD-dvd and Blu-ray war? just for size?

kirk4ever

Disc format and HD resolution are in no way related. Obviously HD movies take up more space because there are more "Dots" per frame, and thus HDdvd and bluray are good for storing large movie files. But if you have something like a game, the information is all stored on a DVD or CD or floppy, as they are able to fit on there, it's not a movie, the cpu then generates and rasterizes the images to an HD resolution displayed on the TV.

HD is the resolution of something, like 1024x768 or 800x600 for a computer, it has no connection with the media it is stored on.

The difference is that video is pre-recorded pictures, and 3D graphics are built by the computer as the game is played.

In a video, all it is is premade pictures displayed one after the other. The more pixels in each picture, the more space they take up. Therefore, HD video takes up far more space than SD video.

In 3D graphics, all that is stored on the disc is the 3D objects and the instructions for their use. The computer builds the picture itself and displays it on-screen. The number of pixels in the displayed image depends on how the computer builds said image, rather than anything premade. If you had a 3D object that took 2 KB on a disc, and told the computer to render it at Ultra-HD Quailty, it would still be 2 KB on the disc, even if the dispalyed image was UHD.

A bit of an oversimplification, but I hope it was clear.

mutenpika

Its called procedural synthesis, but you are absolutely right, which is why the 360 doesnt need all the space that is being talked about on SW. the 360 does this with extreme efficiency, and streaming. It does become a problem with pre-rendered video as you mentioned.

Briefly: rendered resolution has absolutely no bearing on game size. Game resources determine the size of the game.Velocitas8

The numbe of people who don't seem to understand this is suprising.

remember, the 360 uses DVD9, not regular DVDs, a DVD has about 4.7 gigs of ispace while a DVD9 has about 8.5 gigs of space

st1ka