Sony RDR-GX7 - Manual (Page 5)

DVD-RW has the backing of Sony, Pioneer, Hitachi, Samsung, and Apple, among others
in the DVD Forum. It can burn CD-R and CD-RW discs as well as DVD-RW and DVD-R
and boasts a high level of compatibility with existing DVD players and drives.
DVD-RW advantages include:
n
It was the first combination DVD and CD recorder on the market and was released
over a year before DVD+RW.
n More DVD-RW drives in use than DVD+RW at this time.
n The most inexpensive DVD writable media in the market today (DVD-R).
n An impressive level of compatibility with existing DVD drives and players via its
write-once format, DVD-R. This format currently has the edge on compatibility.
n DVD-RW is a rewritable format capable of being reused up to 1,000 times and
claims compatibility with DVD-Video and DVD-ROM standards.
DVD-R provides a 4.7 GB* single-write solution at 2x speed (2.8 MB/s), roughly 18x
CD speed, and a rewrite solution at 1x speed (1.4 MB/s). With Sony’s DRU-500 series,
you can record a DVD-R at 4x speed (5.6 MB/s) and DVD-RW at 2x speed, effectively
doubling previous speeds. It has great compatibility with existing drives and players and
has enjoyed an earlier release and adoption rate. This format must use 2x-rated and
4x-rated media to support the 2x- and 4x- write speeds.
Backed by Sony, Philips, Hewlett-Packard, Dell, Microsoft, and others companies of the
DVD+RW Alliance, the DVD+RW format is based upon existing CD-R/RW technology
and records DVD+RW and DVD+R as well as CD-R and CD-RW discs. Its goal is to
provide consumer electronic and PC compatibility, and is a rewritable format providing
full compatibility with existing DVD players and DVD-ROM drives.
DVD+RW advantages include:
n
Writes and rewrites at the same 2.4x speed. This makes it possible to burn an
hour’s worth of video in under half an hour at a throughput of 3.3 MB/s (equiva-
lent to 20-22x CD recorder).
n Quicker background formatting within seconds, with faster lead-in and finish times
than DVD-RW. This happens invisibly in the background and allows for instant
recording.
n DVD+RW discs can be used for data and video files regardless of speed rating.
n “Lossless linking,” which means that the drive can stop recording at any time and
then resume later without error by editing directly on the disc. You can replace
parts of a DVD+RW recording without having to erase the disc and start over.
DVD+R is a single-write, dye-based medium based on DVD+RW that offers great
compatibility. It is capable of storing 4.7 GB* of information and can use any DVD+R
disc without needing the media to qualify for a particular write speed.
DVD
-RW
DVD
+RW