HD-DVD / Blu-ray for movies. is it needed

D

death734

New Member
one use for hd-dvd and blu-ray is to have high definition video on it.
but my question is do they really need a 25gb discs and like 30,000k bitrate to get HDTV

if you had a 7.92gb dvd
set the bit rate around 7-8mb (7000k - 8000k)
and if you use the codec H.264

under those conditions, couldn't you easily get stunning 1920x1080 True HD picture?
 
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Is H.264 the codec blu-ray is using or something? I don't know much about blu-ray or anything, but I do know DVD's basically max out around 12Mbps. I assume that's basically XP on my recorder which allows for 1 hour on a single layer disk... A regular DVD runs at 720x480, which I beleive(my calculations might be wrong, I don't have my usual calc handy) is about 6 times less than HDTV... So basically, you could get about 10 minutes on a single layer, or 20 minutes on a duel layer using the max DVD compression. Of course, this is MPEG2, and I have no clue how the compression compares to whatever Blu-Ray or anything else will use...
 
Using what little information has been released on the two formats as of yet, the formats are a better option for HDTV viewing. As previously stated, standard DVD's and even DL won't have much space for recording movies. HD-DVD's are a higher compression rate (not sure what) based on the current DVD technology, in contrast to Blu-Ray which uses a completely different format, which makes HD-DVDs a little cheaper to manufacture. If memory serves, the HD-DVDs are only 15GB, whereas the Blu-Ray are pushing 50GB making it a truly viable option for HDTV viewing.
 
I don't think it's about needing the room, but having it available on he same size disc.

just to let you know, the HD-DVD has been made capable of holding 45GB on a dual layer disc, and around BD-DVD's also utilize layers that are 25GBs each. Early in development, they were to experiment with putting even more layers in, but I don't think they've worried too much about that.

What makes the BD-DVD capable of handling more space is the fact that it's using a blue laser, as the name may suggest, which is more dense and there for the pits in the disk can be closer together.
 
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