Blu-Ray kann leichter mehrschichtige Medien bewerkstelligen. Sie lagen letztens bei 8-schichtige 200 GB. HD-DVd dümpelt immer noch bei 3-schichtig (51GB).
Leider ist die Yield Rate schon bei BD25/50 sauschlecht und wahrscheinlich einer der Gründe warum Paramount/Dreamworks umgeschwenkt sind.
Ist schon eine 200 GB BR auf dem Markt bzw. welchen Nutzen soll sie haben?
http://forum.cinefacts.de/showthread.php?t=180137
ZITAT:
Aktuelle Yield Raten für BD25/BD50 katastrophal
Die Entscheidung Para/DW scheint tatsächlich eine ganze Menge mit den derzeitigen yield-Raten beider Formate zu tun zu haben.
Nach aktueller Situation sind es bei der HD-DVD konstant über 95% (HD15 und HD30), während in den relevanten 4 Replikations-Einheiten der BDA die yields katastrophal niedrig liegen für BD50 (3 Werke mit unter 10 %, eines mit um die 50%) als auch bei der BD25 (60-70%)
Ein massiver Punkt bei der Überlegung eines Studios den Massenmarkt für ein neues Format zu gewinnen.
Offenbar gibt es massive Probleme bei der Replikation von BD's, daß unter anderem dazu führt, daß unabhängige Replikatoren derzeit die Finger von Investitionen in diese Technik lassen.
Im Gegensatz zu HD-DVD's, die auf jeder aktuellen DVD-Replikationseinheit innerhalb einer Umstellzueit von wenigen Minuten produziert werden können, sind BD-Replikationseinheiten ausschlieeslich für die Produktion von BD's geeignet.
Es liegt auf der Hand, daß eine Investition in BD-Replikationslinien derzeit sehr unbeliebt sind.
Die Daten stammen von David Vaughn, der unbestritten seit seiner Mitgliedschaft bei AVS den Status eines ECHTEN neutralen Insiders geniesst.
Link Post:
http://www.avsforum.com/avs-vb/showt...9#post11516639
Link Thread:
http://www.avsforum.com/avs-vb/showt...3#post11518343
Zitat:
OK
Ive heard back from a couple of sources, and also was able to hear from a new one as well. Here is where we are:
Sonys yields have improved a bit this summer and are up to around 50% depending on how much data is on the disc. The more data, the lower the yields, the lower the data, the higher the yield number goes, but 50% is just about max right now (give or take a percentage point or two).
As for independent replicators, there are four majors that are capable of doing BD50s according to my sources. They are Cinram, Deluxe, Panasonic, & Infodisc. Of these four, one of them (unnamed by the request of my source at that company) is getting yields on BD50s up there with Sony in the 50% range. The other three cant get above 10%, but Sony is lending a hand to them to increase their yields. I am assuming they will get things in line based upon the one independent that I referenced above who has been able to increase yields.
An interesting side note to this though is the yields on BD25s, that are much lower than I thought they would be. Right now, the are hovering in the 60-70% range and are in the same scenario as the BD50s when it comes to the amount of data on the disc. The lower the amount of data, the higher the yields are. At this point in the game, I would have expected the single layer discs to be much higher than they currently are.
Another thing that should be noted is that Paramount/Dreamworks was using one of the three replicators that couldnt get the yields up above 10% on BD50s. Could this have been one of the things that precipitated their move to HD DVD?
So, where does it leave us? For the most part, nothing has changed from what I reported last week, other than there is one major replicator of BD50 discs that have improved yields, but the other three majors cant get them to work as of yet. These other companies are sending the work to either Sony or the other independent to do their BD50 work, which Im sure raises their costs (outsourcing while their equipment sits idle
never a good thing in manufacturing). The good news is that the BDA is able to keep up with demand at this time, even with the lower yields and less manufacturing capacity, mainly due to the fact that sales are pretty pathetic on both formats compared to DVD. But with player adoption growing, disc sales growing, and the holiday buying season just around the corner, yield rates could become a much bigger issue the next 6 months.
Now, on to HD DVD: As Amir has stated before, there are literally hundreds of HD DVD production lines that are available in the marketplace. Since it is essentially the same process to make a HD DVD vs. a DVD, the manufacturing process is much easier to implement and yields are a lot higher. Jeff stated some numbers earlier that HD15s and HD30s are above 95%, and I can confirm those numbers as well from a couple of well-placed sources. But, Ive hit a stone wall when it comes to the combo discs, which no one can seem to get the yield numbers on these. My assumption is that they arent as high as the HD30 and HD15 numbers since there is the extra process that needs to take place (which Amir has spoken about). Could this be one of the reasons why Combos have been limited to new releases only and not on catalog titles? Or, was it that the studios (Universal especially) didnt see the need to use combos anymore on the catalog titles because it wasnt helping sales?
Comparing the two camps on this, HD DVD is in a much better position (from a manufacturing perspective). First, due to the disc thickness, the drying time of the disc making process is 50% shorter. When you throw in that the yields are about twice as high, that means you essentially have a 4-1 advantage in actually making the discs in favor of HD DVD. Again, right now that isnt a big deal since there arent that many discs being pressed, but with wide adoption of both formats, HD DVD will have a manufacturing edge unless yields increase for BD50s. Even if they can get the yields up to above 95%, they still take longer to make than an HD DVD, so in order to output the same amount of discs they will need to work twice as long or spend extra money on another fabrication line, which just adds to the overall cost.
Ich bin mir nun endgültig sicher, daß die Aussagen von dem angeblichen Sony-Insider "PaidGeek" die yield Raten für BD50 wären weit über 80% auf allen Linien - der schon auf mehreren Forenseiten wegen unlauterem Vorgehen und FUD gebannt wurde (u.a. HighDefDigest) - nichts weiter als reine Lügen sind, wahrscheinlich wieder der Versuch der BDA FUD zu verbreiten, ist ja nichts heues!?
Jedenfalls scheinen die Studios demnächst bei weiter steigendem Bedarf für BD's in eine ernsthafte Problematik zu geraten, denn es ist keine Ausweitung der existierenden Kapazitäten in Sicht aufgrund der o.g. Situation.
Ich glaube mittlerweile wirklich, daß dies DER Grund für PAra/DW war sich von der BD abzuwenden.
Mal sehen ob diese Problematik weitere Folgen lässt...
ZITAT Ende