bdbdbd said:
windbane said:
bdbdbd said:
About clever data usage. Anyone remember Resident Evil 2 on N64? DL discs lower the read speed, but if the speed is half, compared to SL discs, 360 still reads the discs as fast as PS3. Who was it that said, that they compressed data 2:1, because PS3 decompresses faster than it reads. So, if you want data to read fast, then you have to compress it. I don't know, that how much you can compress the data with 360 and PS3, but the point still is, that you have to compress it. Otherwise you lose the speed. 360 and PS3 are very powerful, and can decompress data fast. |
Uh, no. Max read speed for 12x DVD is about 16MB/s compared to 2x blu-ray at 9MB/s. Except, the max speeds for DVD are only available at the edge of the disc, whereas blu-ray has the same read speed throughout the disc. So, the 360's drive averages about 10-12MB/s compared to 9MB/s. Of course, the advantage would be with the 360 here since critical files can be located at the faster portion of the disc. Except, speeds are slower on DL discs than blu-ray (especially if you go by half speed like you're saying). Then, you can always install critical files on the hard drive to load even faster. Only PS3 can count on that with every system. I'm not sure what the read speed is for the PS3 hard drive but I assure you it's average read speed is at least 3 times faster than the max read speed of 12x DVD with a SL disc. |
Every DVD drive i have had, have the "speed times X" being based on the average. Of course i don't know what rate M$ has told. 4.5 Mbps for the 1xspeed for BD? Isn't that 4.5 the tranfer rate used for HD movies? Which is 1.5 times the standard. |
Well I said the average is around 12x (actually slightly lower like I said). That means part is slower than blu-ray and part is faster. Blu-ray is constant. http://en.wikipedia.org/wiki/Blu-ray shows the speeds, and 2x is 72Mb/s which is 9MB/s (bits versus bytes, 8 bits per byte). That's read speeds. The bit rates for various things are on that wikipedia link and show blu-ray being faster than hd-dvd and of course dvd for audio, video, and transfer. Again, dual-layer reads are slower and hard drives are much faster than either anyway.
