Glossary
598 Electra VS
- Version 05.10
User Manual
- Rev. A
LC-AAC
Low Complexity-Advanced Audio Coding.
LCD
Liquid Crystal Display.
LED
Light Emitting Diode.
LFE
Low Frequency Effects
LOAS
Low-overhead Audio Stream
LOAS is part of the method to encapsulate HE-AAC audio into a transport
stream.
LUFS
Loudness Unit relative to Full Scale
M
In a GOP (Group Of Picture), M is the distance between successive
P-Frames.
Macroblock
A area of the TV picture. Macroblocks are usually composed of two or
more blocks of pixels. The size of a block depends on the codec and is
usually a multiple of 4. In MPEG-2 the size is fixed at blocks of 8x8 pixels.
In H264 the overarching macroblock size is fixed at 16x16 pixels, but this is
broken down into smaller blocks or partitions which are either 4, 8, 12 or
16 pixels by 4, 8, 12 or 16 pixels.
MBAFF
MacroBlock Adaptive Frame Field coding. Use a macroblock pair structure
for pictures coded as frames.
MIB
Management Information Base.
SNMP collects management information from devices on the network and
records the information in a management information base. The MIB
information includes device features, data throughput statistics, traffic
overloads, and errors.
MPTS
Multiple Programs Transport Stream
MTU
Maximum Transmission Unit: The size of the largest packet that a network
protocol can transmit.
Multicast
Process where a single stream is served from one source to multiple
receivers. The multicast address range is: 224.0.0.0 - 239.255.255.255.
NMS
Network Management System.
NTP
Network Time Protocol.
Packet
- In networks, a unit of data transmitted over a packet-switching network.
A packet consists of a header followed by a number of contiguous bytes
from an elementary data stream.
- In transport streams, a packet is a small, fixed-size data quantum.
PAFF
Picture Adaptive Frame Field coding. Allows a freely selected mixture of
pictures coded either as complete frames where both fields are combined
together for encoding or as individual single fields.
PCM
Pulse Code Modulation
PCM is a modulation technique. It is a digital representation of an analog
signal where the magnitude of the signal is sampled regularly at uniform
intervals. Every sample is quantized to a series of symbols in a digital
code, which is usually a binary code.
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