More than 2 layers on commercial BDs? - Blu-ray Forum

Polyh3dron · 12-13-2006, 03:32 AM

I know that TDK made experimental 100 and 200GB Blu-Ray discs. I also read in Wikipedia that the 200GB will never be able to be used in a BD movie player because the specs were already finalized for a certain amount of layers and I was just wondering, Are commercial BD Movie players able to read BDs with 3 or more layers on them such as 75 or 100GB discs?

Dave · 12-13-2006, 03:39 AM

Yes current player may not read 100GB media. I dont know if firmware update can fix this.

Panasonic is almost ready with 100GB too. We should see them soon.
They claim 100 year lifespan of those media!

Blue · 12-13-2006, 07:24 AM

I think unless firmware can easily upgrade existing players (and I think that maybe a long shot) you certainly won't see it while HD-DVD is around and probably not for a long time to come. This is NOT part of the blu ray specifications, so until it is in the specifications, it's a novelty R&D project stuck in a lab/s. The specifications are only for 1 & 2 layers. Members of the BDA have been quite vocal about the standard being around for at least 10 years.

Polyh3dron · 12-13-2006, 07:45 AM

Thanks for clearing that up for me.

dobyblue · 12-13-2006, 11:13 AM

I don't see why a firmware upgrade wouldn't be able to adjust the layer problem. I certainly think it would having a problem reading TDK's disc as they went with a 33.5GB layer instead of 25GB.

Blue · 12-13-2006, 02:53 PM

Quote:

Originally Posted by dobyblue

I don't see why a firmware upgrade wouldn't be able to adjust the layer problem. I certainly think it would having a problem reading TDK's disc as they went with a 33.5GB layer instead of 25GB.

Firmware is "embedded" software, nothing more, nothing less. I can't comment for fact on the layering in blu ray as I don't know how it has been implemented. I however know how at least one model has implemented it in DVD (PC drive) and it is impossible to add another layer to that DVD drive and I suspect the same is true for all 2 layer DVD drives. I have little knowledge of the physical implementation of Blu Ray especially around the optical areas, however I would love to know more.

12-13-2006, 03:32 AM	#1
Polyh3dron Senior Member Member since:Dec 2006	More than 2 layers on commercial BDs? I know that TDK made experimental 100 and 200GB Blu-Ray discs. I also read in Wikipedia that the 200GB will never be able to be used in a BD movie player because the specs were already finalized for a certain amount of layers and I was just wondering, Are commercial BD Movie players able to read BDs with 3 or more layers on them such as 75 or 100GB discs?

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12-13-2006, 03:39 AM	#2
Dave Expert Member Member since:Jun 2006 Location:Somewhere	Yes current player may not read 100GB media. I dont know if firmware update can fix this. Panasonic is almost ready with 100GB too. We should see them soon. They claim 100 year lifespan of those media!

12-13-2006, 07:24 AM	#3
Blue Super Moderator Top contributor Member since:Jan 2005 Location:Melbourne Australia Blu-ray collection:206	I think unless firmware can easily upgrade existing players (and I think that maybe a long shot) you certainly won't see it while HD-DVD is around and probably not for a long time to come. This is NOT part of the blu ray specifications, so until it is in the specifications, it's a novelty R&D project stuck in a lab/s. The specifications are only for 1 & 2 layers. Members of the BDA have been quite vocal about the standard being around for at least 10 years.

12-13-2006, 07:45 AM	#4
Polyh3dron Senior Member Member since:Dec 2006	Thanks for clearing that up for me.

12-13-2006, 11:13 AM	#5
dobyblue Super Moderator Top contributor Member since:Jul 2006 Location:Ontario, Canada Home Theater Gallery:71 4K collection:55 Blu-ray collection:655 Blu-ray reviews: 15	I don't see why a firmware upgrade wouldn't be able to adjust the layer problem. I certainly think it would having a problem reading TDK's disc as they went with a 33.5GB layer instead of 25GB.

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