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Appendixes
IP-900 Series
124
STN and DSTN, and active matrix LCD such as
TFT.
LED (Light-Emitting Diode)
The IP-9500/IP-900 series has power LED and
alarm LED lamps. The power LED lamp lights in
green to indicate that the power is on. The alarm
LED lamp lights in red to indicate that an alarm
has occurred.
Letter Box
One of the methods to downconvert video
sourse of screen size ratio (aspect ratio) from
16:9 to 4:3 screen size. The resulting image has
black bars at both upper/down parts of the
video.
MLD v1 (Multicast Listener Discovery
version 1)
A protocol that has been defined by RFC2710.
It is used to detect a multicast listener that
receives a multicast datagram.
MLD v2 (Multicast Listener Discovery
version 2)
A protocol that has been defined by RFC3810.
In addition to the MLD v1 supporting function, it
has an information source filtering function,
which enables the specification for receiving
only the packets sent from specific origination
addresses (or addresses that are not specific
origination addresses).
MPEG-4
Video data compression method that is a part
of the MPEG standard. MPEG-4 was designed
to distribute video images of low picture quality
(due to a high compression ratio) over slow
communication lines (e.g., cellular phone and
telephone lines.) MPEG-4 was also designed to
transmit video together with audio at about 64
kilobits per second.
NTSC (National Television Standards
Committee)
The standard for analog television systems
established by a US standardization body.
NTSC images are made of 29.97 interlaced
frames per second, each of which is composed
of 525 scan lines in total.
Original network ID
ID for identifying a transport stream. Each
transport stream is identified by the combination
of an original network ID and a transport stream
ID.
PAL (Phase Alternating Line)
The standard for analog color television
broadcasting developed in Germany. PAL
images are made of 25 interlaced frames per
second, each of which is composed of 625 scan
lines in total.
PAT (Program Association Table)
Table included TS (Transport Stream) and the
list in PMT PID. The PID of PMT is 0.
PES (Packetized Elementary Stream)
A packetized method provided by MPEG2
System. Encoded video or audio bit streams are
called “Elementary Stream.” These streams are
packetized by standard and are called “PES.”
PID
A packet identifier which has the 13 bits
information, included in TS packet.
Pilot Mode
A mode adopted in the DVB-S2 standard to
improve synchronization characteristics at a low
C/N ratio. This device has a setting for
specifying whether to insert the pilot signal for
synchronized playback into physical layer
frames.
Ping
A command supported by operating systems
such as UNIX and Windows that are used in a
TCP/IP network to determine whether IP
packets can reach or have reached a
communication destination.