someone explain to me the difference between DVD+R -R and Dual Layer

Discussion in 'OT Technology' started by ThinkTANK, Jan 4, 2005.

  1. ThinkTANK

    ThinkTANK New Member

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    so whats the difference between them?

    i want to purchase a dvd burner, but im confused with all the + - R and DL stuff.

    can i get a nec 3520a and burn on regualr dvd discs?
     
  2. Leb_CRX

    Leb_CRX OT's resident terrorist

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    ok

    the +/- are single layer disc
    they are diff

    basically they couldn't agree on a medium (sony/pansonic I THINK) and one made + and one made -

    now they both work fine, some DVD players can read both, some + some -...buy a 5 pack of + and a 5 pack of - and burn and test, see which one your dvd player(s) work with

    dual layer means it's 8.x G of data on a disc...the +/- are single layer and 4gig each...

    dual layer is MUCH more $ (1 blank for like 5$), whereas single layer is very cheap ([email protected] for 10$)

    I HOPE that makes sense...it may not all be right but thats what I've gathered from it all...

    doesn't make a diff, like I said stick with single layer, buy 1 + and 1 - and test
     
  3. skinjob

    skinjob Active Member

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    The NEC 3520a is a good choice since it can write -R, +R and DL. As Leb_CRX already stated, there really isn't much of a difference between + and -. The choice of which one to use depends on which one is compatible with the device that's going to read the disc.
     
  4. P07r0457

    P07r0457 New Member

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    Dual layer is NOT Double layer.

    Most burners under $100 are *DOUBLE* layer. A *DUAL* layer drive would cost $1000+
     
  5. 5Gen_Prelude

    5Gen_Prelude There might not be an "I" in the word "Team", but

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    What's the difference then?
     
  6. P07r0457

    P07r0457 New Member

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    different formats. Probably to keep it a little different from a commercial dvd.

    a dual-layer disc is often called a DVD9, and has roughly 9.4GB of usable space. A double-layer disc is often called DL, and has roughly 8.5GB of usable space.
     
  7. johnson

    johnson New Member

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  8. Mikey D

    Mikey D New Member

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    Do you mean double sided?
     
  9. ThinkTANK

    ThinkTANK New Member

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    so no diferences between the - +R's

    DL discs are expensive.

    and the majority of newer DVD players have no issues with playing DVDr's

    cool. thx guys, i will pick up the nec 3520 and start rippin away!
     
  10. Leb_CRX

    Leb_CRX OT's resident terrorist

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    I have the nec 3500a and I love it :love:

    hasen't failed me yet
     
  11. P07r0457

    P07r0457 New Member

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    *NO*.

    A double-sided disc can have either two DVD5 or two DVD9 layers (also known as DVD18)

    Double Layer and Dual Layer both have 2 data-containing layers on ONE side. But they are not the same.
     
  12. Mikey D

    Mikey D New Member

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    Link me to some reference describing the difference between the two please.
     
  13. 5Gen_Prelude

    5Gen_Prelude There might not be an "I" in the word "Team", but

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    So it's still possible (assuming this was legal) that you couldn't do an exact duplicate of a commercial DVD without shrinking it?
     
  14. P07r0457

    P07r0457 New Member

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    assuming the disc was not encrypted -- then it is legal to make an archival copy. The legal concern with copying dvd's isn't that you're making a backup -- but that it is not legal to crack the encryption... and most commercial dvd movies are encrypted.

    But, yes, if the disc contained more than 8.5GB of data, but still was within the 9.4GB available on a DVD9, even if the disc as unencrypted, it would not be possible to do a bit-for-bit copy. You would either have to compress the data further (loss in quality), or remove some data (loss of special features).
     
  15. Mikey D

    Mikey D New Member

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  16. P07r0457

    P07r0457 New Member

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    here is a somewhat technical article that outlines differences between the DVD+DL and commercial DVD Video formats.

    http://www.mediachance.com/dvdlab/Helppro/layerbreak.htm

    I have not read the entire article, but a quick search on google returned it, and it seems to be what you are asking for.

    But finding reputable information on it is becoming hard, since soooo many people freely exchange the terms "double" and "dual" layer.
     
  17. P07r0457

    P07r0457 New Member

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    you're very pushy... I was in the middle of responding to you when you posted AGAIN. :mamoru:

     
  18. Mikey D

    Mikey D New Member

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    Ok that explains a little bit but i'm still wondering where you read that the DVD Video discs are 9.4GB, I know DL recordable media is 8.5GB.

    Or is it just because one disc is formated already and the other isn't, therefore really being equal.
     
  19. Mikey D

    Mikey D New Member

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    Agressive is the word I would use.
     
  20. P07r0457

    P07r0457 New Member

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    a DVD+/-R is 4.7GB
    a DVD+DL is 8.5GB
    a DVD5 is 4.7GB
    a DVD9 is 9.4GB

    Hypothetically, a DVD9 is a disc with two DVD5 layers, one being transparent/translucent so that the laser can also track the layer beneath. I recall reading 9.4GB was the size of a DVD9 a long time ago when DVD burners were just becoming available. It also makes sense considering that 4.7*2=9.4; although that is not how I arrived at the figure. If you sort through your DVD collection, you'll probably find a disc larger than 8.5GB. However, I have yet to hear of a disc larger than 9.4GB (excluding DVD18, which is a disc with a DVD9 on each side for a total of 4 layers -- but it requires you to flip the disc)
     
  21. Mikey D

    Mikey D New Member

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    See the only time i've heard 9.4GB thrown around is when talking about the double sided disc, 4.7GB on each side.

    While the dual layer dvd media that's just started to come out is only 8.5GB on one side.
     
  22. P07r0457

    P07r0457 New Member

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    A disc that has 4.7GB on each side is called a DVD10.
     
  23. Mikey D

    Mikey D New Member

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    Yup aka double sided on meritline.com
     
  24. skinjob

    skinjob Active Member

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    Are you sure that "double" and "dual" are the specific terms used to distinguish between the two formats? I thought "dual layer" was just a general term refering to the fact that there are 2 layers. The article you posted seems to use the term that way, and refers to the formats individually as DVD-Video and DVD+R DL.
     
  25. P07r0457

    P07r0457 New Member

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    When I spoke with a rep from Pioneer, it was specifically explained that "Dual" was the commercial format, and that "Double" was the consumer format.

    So whether or not that is, or continues to be, true is up for debate. To elaborate on that, this would not be the first thing to have it's naming convention changed due to wide-spread misinformation by the consumer. Afterall, it's easier for a marketing team to adjust to what the consumer already knows, as opposed to change the consumers view. Hence we have a Xerox copy, even though it may be from a non-Xerox-brand copier. Cannon is a classic example of failed marketing with their "It's a cannon copy" campaign.

    What I can say for sure is that the DVD+DL format is definitely not the same as the commercial DVD-Video format that many people assume -- and that "Dual Layer" burners are produced at the cost range of $1000+, and DVD+DL burners are produced at the range of $60+.
     

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