Posted by BR549 on 12/02/06 22:05

<aniramca@yahoo.com> wrote in message
news:1165096215.295727.171560@j44g2000cwa.googlegroups.com...
> Do you think that the video format war for the DVD will be over soon?
> I still do not see that one format is overpowering the other. I have a
> few questions about these formats
> - Which one was the one first to come out?
> - When you buy a DVD movie from a store. Is it a DVD-R? It has the
> same symbol as DVD-R (The DVD+R symbol just a box with RW written on
> it). The DVD movie, as well as DVD-R has the disk picture logo on it.
> - Is dual layer DVD applicable for both the DVD-R and DVD+R?
> - In the past, some movie's DVDs were written on both sides (sometimes
> one language on one side and another on the other side). Could you buy
> such a DVD in the market?. Do you have to have a special device to
> record or to play?
> - Technically, which one is more superior? DVD-R or DVD+R ? If DVD+R
> came up later than DVD-R, did it means better and newer technology?
> - Is it technically more complicated to produce a DVD recorder which is
> capable to handle both DVDs? Or, it is just a simple switch technology
> inside the box. If this is the case, then those DVD producer must have
> vested interest with one type of DVD over the other. My LiteOn brand
> DVD recorder is cheap (now under $100), and has the convenient to to
> both? Why not other manufacturers follow suit (except for those who
> invested one format over the other).
> I seem to notice that DVD writers for computers appear to be accepting
> both formats more readily than those stand alone DVD recorders/players
> to record from TV.
> - When people invented CD-R or DVD disk years ago, they indicated that
> using the CD or DVD technology is different from a music/video tape, or
> LPs. Unlike those other old cassette, LPs, there is NO contact when you
> play a Cd or DVD. However, I notice that CD and DVD have lots of
> scratches after a while. How do these scratches created?
> - Final question - where do you find a DVD disks that guarantee that
> the recorded data will last a long time. Is there a special DVD (DVD
> gold or something) that can guarantee the data will not disappear
> (permanent) after it is recorded. I seem to only notice one type or
> grade for DVD disks, but I may be wrong.
>
> I know that these DVDs may be replaced with either Sony's Blu-ray or
> the HD-DVD. However, I still do not see that DVD-R or DVD+R comes as a
> winner, unlike the battle between Sony Betamax and VHS format. It is
> more convenient when you look at CD-R, there is only one type available.
>

I didn't think there ever was a war going on. To answer some of your
questions, here is a copy and paste from vcdhelp.com:

DVD-R and DVD-RW
DVD-R was the first DVD recording format released that was compatible with
standalone DVD Players.
DVD-R is a non-rewriteable format and it is compatible with about 93% of all
DVD Players and most DVD-ROMs.
DVD-RW is a rewriteable format and it is compatible with about 80% of all
DVD Players and most DVD-ROMs.
DVD-R and DVD-RW supports single side 4.37 computer GB* DVDs(called DVD-5)
and double sided 8.75 computer GB* DVDs(called DVD-10).
These formats are supported by DVDForum.

DVD+R and DVD+RW
DVD+R is a non-rewritable format and it is compatible with about 89% of all
DVD Players and most DVD-ROMs.
DVD+RW is a rewritable format and is compatible with about 79% of all DVD
Players and most DVD-ROMs.
DVD+R and DVD+RW supports single side 4.37 computer GB* DVDs(called DVD-5)
and double side 8.75 computer GB* DVDs(called DVD-10).
These formats are supported by the DVD+RW Alliance.

DVD+R DL
DVD+R DL or called DVD+R9 is a Dual Layer writeable DVD+R. The dual layered
discs can hold 7.95 computer GB* (called DVD-9) and dual layered double
sides 15.9* computer GB (called dvd-18).

DVD-R DL
DVD-R DL or called DVD-R9 is a Dual Layer writeable DVD-R. The dual layered
discs can hold 7.95 computer GB* (called DVD-9) and dual layered double
sides 15.9* computer GB (called dvd-18).

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