Selenio
TM
BNP User Guide, Release 3.7.1
272
-
L
LED
Light Emitting Diode. A semiconductor diode that emits light when current passes
through it. LEDs are used as indicators.
M
MGT
Master Guide Table, part of 9 tables in the ATCS PSIP. MGT provides program-
identification (PID) locations so a receiver can find the other tables, and informs the
receiver of changes or table updates.
MIB
Management Information Base. MIB defines the variables needed by the SNMP
protocol to monitor and control elements in a network.
MID
Mid-plane.
MPEG
Moving Pictures Experts Group. The standards group and the standard for
compression and storage of motion video.
MPTS
Multi-Program Transport Stream. A combined multiplex of video streams.
MUX
Multiplexer. A device that both combines multiple data sources into a single data
stream for transmission, and demultiplexes the single data stream into its composite
forms.
N
NTP
Network Time Protocol. A TCP protocol that assures accurate local time-keeping with
reference to radio and atomic clocks, and can synchronize distributed clocks within
milliseconds.
NTSC
National Television System Committee. Committee that defined the current standard
for analog color television in North America, as well as the name for the standard. The
format is 525 lines in 4MHx of video bandwidth.
O
OOB
Out-Of-Band.
P
PAT
Program Association Table. A table ID that indicates the MPEG-2 SI packet type.
PCR
Program Clock Reference.
PMT
Program Map Table. A table ID that indicates the MPEG-2 SI packet type.
PNG
Portable Network Graphics. PNG format is used for lossless compression and for
display of images on the web. Unlike GIF, PNG supports 24-bit images and produces
background transparency without jagged edges. PNG format supports RGB, Indexed
Color, Grayscale, and Bitmap mode images without alpha channels. PNG preserves
transparency in grayscale and RGB images.
