Glossary
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MPEG:
Abbreviation for Motion Pictures Experts Group. Video-compression
standard. There are different formats for different types of compression, such as
MPEG 1, MPEG 2, etc.
MPEG 4 AVI:
Video format with extremely high compression.
N
NTSC:
Abbreviation for "National Television Standards Committee". A
television standard with 525 lines and 60 fields per second that is used in North
and Central America. (see also "PAL", "SECAM", "Field")
P
PAL:
Abbreviation for "Phase Alternation Line". Television standard developed
in Germany that uses 625 lines and 50 fields per second. This is the main TV
standard in Europe. (see also "NTSC", "SECAM", "Field")
PCMCIA:
Abbreviation for "Personal Computer Memory Card International
Association". A PCMCIA card is a lightweight, removable module about the
size of a credit card that provides additional functionality to a portable
computer. The module may expand existing RAM or hard-drive space or
provide network functionality.
Peer-to-peer (P2P):
Peer-to-peer filesharing sites are Internet forums that offer
freely available media files. There are more than 70 such forums online.
PHP:
The abbreviation PHP officially stands for "Hypertext Preprocessor". PHP
is a widely used scripting language designed for general use. It can be embedded
in HTML and is ideal for Web applications. PHP is easy to learn, offers
excellent database and Internet-Protocol interfaces and supports many additional
function libraries. PHP is the ideal development tool for creating dynamic Web
content.
PIN:
Abbreviation for "Personal Identification Number". A PIN is a secret code
comprising several digits that identifies a given user.
PiP:
Abbreviation for "Picture in Picture."
Pixel:
Also known as a "picture element" or "pel". In a video-recording device
(such as a camera) or a playback device (such as a monitor), a pixel is a light-
sensitive or light-emitting surface with a specified height and width. When
stored electronically, pixels contain brightness and color information for a given
image element. The aspect ratio, which also plays a key role in video playback,
is stored separately in the files for some data formats. (see also "Aspect ratio")
PNG:
Abbreviation for Portable Network Graphics. Graphics format for bit-
mapped images that supports interlacing and offers 24-bit color depth and
lossless compression. (see also "Interlace")
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