Quote:
Originally Posted by
MovieSwede 
Wait a second, yes at 30mbs you cant fit a 2h30minute movie, but thats why they use VBR and not CBR. So no it aint a space issue.
Audio is studio descision and not bandwith problem.
Not entirely correct. A HD-DVD studio exec can say he wants IME on top of the video, TrueHD at native sampling rate (24-bit, 48kHz) as well as other subtitling and language options.
The job of the encoding engineer (on either format) is to make sure that the video first and foremost can be presented in the best quality given the limitation of the format before all the other extras are added in. While both audio and video are variable bitrate encodes, there is a ceiling to which they cannot do the impossible which is exceed the bandwidth.
Audio encodes are pretty small in comparison to video but if lossless audio (for example) causes the bandwidth limit to be breached at any time, the engineer will have to decide whether the video needs to be re-encoded or the list of features needs to be reduced.
That is why bandwidth is pretty important regardless of capacity. TL51 fixes capacity but not bandwidth.Quote:
Originally Posted by
Lee Stewart
The only thing BS here is this post. The TL51 is going through a process. It is not finished in the testing phase. Toshiba is playing it very smart. Don't say anything until you are 100% sure of the results.
I agree. TL51 is not yet finished. Even Toshiba spokesperson said so.
That is why I vote to have the MODS change the topic of this thread.From DVD Times, emphasis mine:Quote:
Originally Posted by
DVD Times
DVDTimes: So, if that does come out, do you know if the current drives would be able to read it with a firmware update? Is there any likelihood that we'll ever see triple-layer film discs?
Jim Armour, Toshiba: Any likelihood... well, if we're actually creating the format, I think there's a likelihood. There is a likelihood - a 45gb capacity could be very useful. Whether drives can read it, I don't know - because, basically the specification hasn't been set. It's like when the first Dual Layer DVD-Rs came out, really old drives couldn't read it. [...] It could well be the same situation. Until the standard has been specified and ratified, you can't really say whether it'll be able to read it.
I would go as far, in fact, to say probably not. You're having to focus through two primary layers. The amount of reflected energy that you're going to get back will be quite low. Now in my opinion, in order to read this kind of media, you're going to need something like - do you know your way around the term PRML?
DVDTimes: I actually don't, no - could you explain that?
Jim Armour, Toshiba:
It's Partial Response Maximum Likelihood - PRML. It's in hard discs. It's like a digital filter where you take the signal, which is quite weak and has a lot of noise in it, and you clean up the noise. The signal you get out is still looking like noise, but you know that in certain points, the data is going to have a slightly stronger signal at these points. So, you put it through a digital filter, and you compare it to non-data. And then, you pick out the data from this noisy signal with it.
It's a very interesting technology, but it's not actually built into current HD DVD readers.
The signal that you're going to get back off triple layer is going to be something in the region of only 15-20% of the current reflected information that you get off a single layer.
DVDTimes: Basically, not good enough to get anything out of, then?
Jim Armour, Toshiba:
Not good enough to get information out of, WITHOUT this PRML circuitry, and the first drives don't have PRML circuitry built in. I don't think that even with a firmware upgrade, you'd be able to do it.
Basically Armour is saying if the HD-DVD players out there do not have PRML circuitry, then no firmware upgrade can make those players read TL51. Circuitry, not software/firmware.
Don't have a beef with me, I'm just the messenger. He said it.
fuad
) but in general... Do we really need it?
