[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: off topic: dvd question



You all got me wrong !

the question is not if a nic can support the b.w.
assum i have an pentium II with 1Ghz clock speed and
1 terra bytes of ram. this is not the point !

the question is if there is a possibility to decode the mpeg
film on one computer while the DVD drive is on another.

I ask this because I was told that there is some encription
or simmiliar in the DVD to disable pepole copying the Movie 
from  the DVD, so one ca not read the data from the disc and 
send it as an mpegII stream on the net, unless one have the
knoledge of how to decript the movie

regards
Erez.

btw: I do have 13Mbps nics, they are DSL nics.



Doron Shikmoni wrote:
> 
> >Hetz Ben Hamo wrote:
> >>
> >> Simple answer. Not possible...
> >>
> >> Not simple answer, even if u pass the decoding issue, there are so much data
> >> moving to show the pics (and we're talking something that 100Base T won't
> >> even handle it) so you can't...
> >
> >AFAIK mpegII is 6-12 Mbits/Sec (which may pass via 10BaseT)
> >my nics are 13Mbits/s so it should be enough
> 
> The theoretical limit of Ethernet is 10Mb/s. No NIC can ever reach
> that limit (it is the nominal bit rate value). As Ariel correctly
> noted, 2 station 10BaseT network (or a two-station coax setup) can
> sometimes get as high as 8 or 8.5Mb/s.
> 
> Moral: You don't have 13Mb/s NICs :-)
> 
> Of course, with 100Mb/s, it's a different story. Anyway, do not expect
> to reach 80Mb/s with two Fast Ethernet NICs, since you may hit the PC
> speed limit... (bus, disk access, whatever).
> 
> Back to the original issue, I'm not too sure the assertion Hetz made
> above. 100Mb/s is quite a lot. A DVD gets enough juice out of an IDE
> connection. This may translate to 3-4 MBytes/s, which are 24-32Mb/s.
> Still within the scope of Fast Ethernet. Obviously this assumes that
> the decoder is on the local (display) machine, and only the DVD is
> remote.
> 
> You *should* think about things like sustained information rate and
> suchlike; if this is applied in a real (even small) network, you will
> undoubtedly see unstable picture, due to the burstiness of Ethernet.
> 
> All that does not mean that there *are* such solutions (I have no idea
> - I would assume not); just discussing the "potential".
> 
> Doron Shikmoni