So eNCHANT aRM will come out with 2 DVDs?

[scooby_dooby]

You're probably right, and I've gotten way off tangent anyways.

My OP was mis-interpreted as trying to compare the 2 systems, so the PS3 defenders had to step in.

Really I was talking about the X360 and stating that MS had no viable options and even if they had gone with HD-DVD/BR it would've probably increased load times since they wouldn't be able to afford a 3x or 4x drive.

It will be interesting to see what Sony can do by the time they need to launch this spring.

 

[Shifty Geezer]

Shifty I wonder what that minimum spec speed is?

Um...1x BRD, or the minimum required to play movies

 

[akira888]

Um...1x BRD, or the minimum required to play movies

Um, no. On Blu-ray the multiplier (i.e. 1X or 36mbps) is defined relative to the minimum write speed, not the minimum read speed. 1.5X, or 54mpbs, is the sustained data rate required to play BR video.

http://www.blu-ray.com/faq/ (see section 2.3)

 

[robofunk]

Um, no. On Blu-ray the multiplier (i.e. 1X or 36mbps) is defined relative to the minimum write speed, not the minimum read speed. 1.5X, or 54mpbs, is the sustained data rate required to play BR video.

http://www.blu-ray.com/faq/ (see section 2.3)

It clearly says the data transfer rate is 36Mbps. Movies are different because they are using less error correction data.

 

[London Geezer]

It clearly says the data transfer rate is 36Mbps. Movies are different because they are using less error correction data.

I seem to remember the 1.5X figure too (1.5X being 54Mbps).
Not sure why they just didn't make it so that 54mbps is 1X and is the minimum speed for playing movies but hey it doesn't really matter in the end.

 

[Shifty Geezer]

Um, no. On Blu-ray the multiplier (i.e. 1X or 36mbps) is defined relative to the minimum write speed, not the minimum read speed. 1.5X, or 54mpbs, is the sustained data rate required to play BR video.

http://www.blu-ray.com/faq/ (see section 2.3)

Hence why I said 1x BRD speed, OR whatever the minimum spec is needed to play movies. I assumed the minimum 1x spec was fast enough for movies (thinking it'd be stupid to specifiy a specification for a movie playback format where the default speed wasn't capable of movie playback) but if 1x isn't enough, then the minimum speed needed for PS3 would be whatever speed was suitable for movies.

And obviously they were stupid enough to specifiy a 1x speed that's useless for movies, so their minimum base specification isn't capable of doing the job

 

[therealskywolf]

I actuallly think that Sony will have a 4x BR Drive in the Ps3. If you think about it, it really doesn't make sense to have other than that.

I really don't See Sony getting cheap on this end, they did said to everybody that the PS3 would be more expensive than usual.

 

[Mefisutoferesu]

I'm guessing that te 1.5x spec came as a result that Blu-ray was initially not intended as a movie playback format. Originally it was used as a storage device in commercial sectors, but as time went on and the format became for viable for consumers the obvious move would be towards movies, which required a higher speed, thus it's 1.5x instead of 1x.

 

[Shifty Geezer]

Did Sony not originally intend BRD for HD movies then? Is that just a sort of side-effect where they suddenly saw BRD could be used instead of HDDVD and make them more money, so they turned it into a video format?

 

[robofunk]

1.5x is a special movie-mode described in the BD-ROM white paper. http://www.blu-raydisc.com/assets/d...physicalformatspecifications_jan05b-12909.pdf
I assume this is the minimum required for a standalone player. Data is still only 1X on these drives. The 1.5x comes from the fact the drive actually spins 1.5 times faster but only for movies. 2x and up drives probably keep the 1.5x speed to reduce noise in movies.

 

[Mefisutoferesu]

No, I think at some point they always planned to use BRDs for movies, it just wasn't feasible (sp) back then so they just put to the side till the tech matured enough for the consumer market. However, when things finally were mature enough HD movies were in need of more bandwidth than a 1x design would provide. Remember, you build your specification on what you can presently do what you believe will be necesary... BRDs are what 2-3 year old? They probably didn't have an accurate grasp of what was needed and underestimated. I'm probably not making much sense, but... err... you do what you can now and plan for the rest later... that's what I'm trying to say.

 

[randycat99]

My guess is that 1x corresponds to a standard disc rpm for typical optical drive design. You get what you get as far as data rate. 1x just turned out to be not quite enough for HD movies, for the quality they are shooting for at 1080p. The bitrate standards for HD were probably quite a ways along by time BR came along, so the outcome was that the BR would need to "grow" to accomodate the HD spec, rather than the HD spec be shoehorned into the BR spec. It's not really an "issue" per se, rather a sign of good flexibility, imo.