| ASV
(Audio Still Video) |
A
still picture on a DVD-Audio disc |
| Authoring |
For
DVD Video it refers to the creating, collecting, formatting
and encoding of material. For DVD-ROM authoring usually
refers to using a specialised programme to produce multimedia
software |
| BDA |
The
Blu-ray Disc Association. Aim to promote, develop and
provide information for those interested in the Blu-ray
disc formats. |
| Blue
Book |
Document
that defines the CD Extra (enhanced music CD) |
| Blu-ray |
Developed
by the BDA, it is a next generation optical disc format
which uses blue lasers with shorter wavelengths and can
therefore store much more data. It is competing with HD-DVD
as the standard for high-definition DVD. |
| CD |
Short
for compact disc, an optical disc storage format developed
by Philips and Sony |
| CD-R |
CD
format that allows data to be recorded only once on the
disc |
| CD-ROM |
Compact
disc read only memory. Data cannot be erased and re-recorded |
| CD-ROM
XA |
CD-ROM
extended architecture. Hybrid CD-ROM permitting interleaved
audio and video data |
| CD-RW |
CD-ReWritable.
Disc that data can be written on thousands of times |
| cDVD |
Type
of CD which has DVD Video content written onto it |
| Compression |
Reduction
of the size of a digital data file by removing redundant
information |
| DAT |
Digital
audio tape. Magnetic tape used to store digital audio
data |
| Dolby
Digital |
Audio
coding system developed by Dolby Laboratories, used to
encode audio for DVD Video creating mono, stereo and surround
sound |
| Duplication |
The
exact reproduction of original media - normally referring
to the production of discs in smaller quantities |
| DVD |
Digital
video disc or digital versatile disc. Have much higher
capacities than CDs and can be dual layer or double sided |
| Green
Book |
Document
developed in 1987 by Sony and Philips, that describes
the CD-i (CD-interactive) disc |
| HD-DVD |
High
density digital versatile disc which uses blue lasers
similar to that of Blu-ray discs. Being proposed as the
standard for high-definition DVD and is promoted by Toshiba,
NEC and Sanyo |
| IDTV |
Improved
definition television. Improvements in the encoding, scanning
and digital filtering are made to television transmitters
and receivers |
| Injection
moulding |
Molten
plastic is injected into the mould containing the stamper
under high pressure and then cooled to take the shape
of the mirror image of the mould |
| Laserdisc |
First
commercial optical disc storage medium which holds analog
video as well as analog and digital audio, now been replaced
by DVD |
| Master |
Metal
disc containing information ready to stamp a replica of
an optical disc |
| Mastering |
Process
of creating a stamper to be used in the injection moulding
stage of replication |
| Mini
DVD |
Small
size DVDs (8cm instead of standard 12cm). Term is also
used for cDVD which is a type of CD that had DVD Video
content written onto it |
| MO |
Magneto-optical
rewritable discs. They use laser light and an external
magentic field to record data in the directions of magnetic
regions on the disc |
| MPEG |
Motion
Pictures Expert Group. Established and develops the digital
video and digital audio compression standards |
| Multimedia |
Application
that uses media in multiple forms, such as text, graphics,
audio and video |
| NAB |
National
Association of Broadcasters |
| OEM |
Original
Equipment Manufacturer. Company that manufactures computer
equipment, which is then marketed by another vendor |
| Optical
disc |
Direct
access storage format which is written and read by laser
light |
| Orange
Book |
Document
that defines the CD-Recordable disc format |
| PAL |
Phase
alternate line. Colour encoding used in broadcast television
systems, whereby the phase of the colour carrier is alternated
from line to line |
| PCM |
Pulse
code modulation. Method of encoding an audio signal in
digital format |
| Pre-mastering |
Process
of formatting data into the final image that will appear
on the disc |
| RAM |
Random
access memory. When refering to optical disc, the term
is used to indicate the ability to read and write at any
point on the disc |
| Red
Book |
Document
that specifies properties of the CD and encoding digital
audio data |
| Replication |
The
manufacture of optical discs by stamping |
| ROM |
Read
only memory. Data can be accessed and read, but not altered |
| Sputtering |
Process
whereby moulded CDs are coated in aluminium |
| Stamper |
A
nickel disc electroformed from the mother which is used
to mould discs |
| Stamping |
Process
of replicating discs by injecting liquid plastic into
a mould containing a stamper (injection moulding) |
| UDF |
Universal
disc format. A system standard to replace the ISO 9660
used on CD-ROMs, but is mostly used on DVD (required for
DVD-ROMs) |
| VSDA |
Video
Software Dealers Association |
| White
Book |
Document
that defines the specification of the Video CD format |
| Yellow
Book |
Document
that defines the extension of compact disc to store computer
data, ie CD-ROM |
