Release Issued by PLDS:
PLDS Shows the Constant Speed of Lite-On with the Blu-Ray DH-4B1S
PLDS (Philips & Lite-On Digital Solutions) released one of the first Blu-ray
drives on the market, and this month they are rolling out it’s successor, the
DH-4B1S - which offers twice the speed at a more consistent rate.
The internal Lite-On DHX-4B1S burns data to Blu-ray media at 4X using the
inbuilt technology ‘Constant Linear Velocity’ (CLV) which allows data to be
transferred at a consistent 4X rate throughout the burning process. This is a
reassuring and speedy alternative to some other drives on the market that
may claim 6X burning but use ‘Constant Angular Velocity’ (CAV) – a strategy
that starts data transfer at a slower rate and gradually builds to it’s top
speed only at the end of the session (thus in reality the average speed is
much lower than 6X).
Many users don’t use the full capacity of a disc when they make a back up.
“If you use only 75-80% of the disc capacity, a 4X CLV writing strategy will
be a quicker solution then a 6X CAV strategy,” says Marketing Manager
Jelmer Veldman. “We see a growing market acceptance for Blu-ray as the
format of choice for High Definition content playback and for high volume
archiving. With this 4X BD writer Lite-On delivers a faster solution for burning
data to Blu-ray Discs.”
The DH-4B1S will be available across Europe from the end of May however a
recommended price has not yet been confirmed.
A summary of reading and writing speeds for the DH-4B1S can be seen in
the following table:
| Write | Re-Write | Read |
BD-R | 4x | | |
BD-RE | | 2x | |
BD-ROM | | | 4x |
DVD+R | 12x | 8x | 12x |
DVD-R | 12x | 6x | 12x |
DVD+/-R DL | 8x | | 12x |
DVD+/- RW | | | 12x |
CD-R | 40x | | 40x |
CD-RW | | 24x | 40x |
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