Region Codes - LG BH100 Training Manual

the physical structure of a Blu-ray Disc that
make the capacity possible. The positioning of
the data layer is much closer to the laser
(0.1mm from bottom of disc) compared to that
of a CD (1.2mm), DVD (0.6mm), or HD-DVD
(0.6mm) disc. This helps prevent birefringence,
or double refraction, where the substrate layer
refracts the laser light into two separate beams.
If the beam is split too widely, the data is not
read.
Another hurdle that Blu-ray Disc technologies
had to overcome was disc wobble. If a disc's
surface is not exactly flat, and therefore not
perfectly perpendicular to the laser, the laser
beam becomes distorted. With the data layer
being placed so close to the cdm, the problem
of disc wobble is eliminated on BD.
NOTE: During the early stages of BD
development, there was a concern that
since the data layer was so close to
the disc surface, it would be more
susceptible
unrecoverable errors from scratches
than typical DVDs. This fear caused
the early prototypes of BD discs and
players to incorporate a caddy around
the disc to provided extended
protection of the disc surface. However,
by the time that Blu-ray Disc
Technology was released to the public,
a special hard coating had been developed and placed over the data layer of the BD disc.
This hard coating resists scratches and fingerprints sufficiently enough to eliminate the
need for a caddy.
Once the smaller laser beam and disc structure were established, the disc read speeds could be
increased for the BD Technology. Blu-ray Disc movies are read at a rate of over 6.7MBps, or almost 5
times faster than DVDs.

REGION CODES

REGIONAL PLAYBACK CONTROL (RPC) FOR DVD
Region Codes were established into the DVD Standard, mainly in order to protect the copyright
interests associated with movies, as well as to respect and adhere to each country's respective laws
and policies governing ratings, censorship, release windows, and rights for home video product. The
global market was divided into multiple regions. Each region is assigned a number. This Region Code
is coded into both DVD discs and DVD Players. Before a DVD movie will display, the Region Code in
both the Disc and the Player must match.
BH100 Blu-ray Player
to damage and
Laser spot on wobble
Features BD-ROM
Type of Disc Rerecorded
Data layer type Molded
Rewrite cycles N/A
Disc diameter 12cm, 8cm
Data layers 1 or 2
User capacity 23.3, 25, 27GB (12cm SL)
46.6, 50, 54GB (12cm DL)
7.8GB (8cm SL)
15.6GB (8cm DL)
Cartridge Optional
Disc Layers
Playback Side
Cover Layer 0.6mm
Substrate 0.6mm
15
OVERVIEW
BD-R BD-RE
Write Once Rewritable
Inorganic dye Phase-change
N/A 1000 min
12cm, 8cm 12cm, 8cm
1 or 2 1 or 2
23.3, 25, 27GB (12cm SL) 23.3, 25, 27GB (12cm SL)
46.6, 50, 54GB (12cm DL) 46.6, 50, 54GB (12cm DL)
7.8GB (8cm SL) 7.8GB (8cm SL)
15.6GB (8cm DL) 15.6GB (8cm DL)
Optional Optional
Playback Side
Hard-Coat 0.02mm
Cover Layer 0.98mm
Substrate 1.1mm
Overview