Triple-Play Service Deployment

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Glossary
MGT Master Guide Table. An ATSC PSIP table that defines sizes, types, PIDs, and version
numbers for all of the relevant tables within the transport stream.The PID value for
this table is 0x1FFB.
MIB Management Information Base
Micro Bend Small distortion of a fiber caused by external factors such as cabling.
MIP Megaframe Initialization Packet. This packet is used by DVB-T to synchronize the
transmitters in a multi-frequency network.
MOS Score Mean Opinion Score. A numerical indication of the perceived quality of received
voice or video service. MOS is expressed on a scale of 1 to5, with 5 representing the
highest perceived quality. The estimation is based upon algorithms for a specific
service, such as analog voice, packet-based voice (VoIP), and video that analyze
signals, and associated impairments which estimate what humans would score the
same experience. In video services, both video and audio scoring is made.
MP@HL Main Profile at High Level. MPEG-2 specifies different degrees of compression vs.
quality. Of these, Main Profile at High Level is the most commonly used for HDTV
MP@ML Main Profile at Main Level. MPEG-2 specifies different degrees of compression vs.
quality. Of these, Main Profile at Main Level is the most commonly used
MPEG Moving Picture Experts Group. A working group of the International Organization
for Standardization (ISO). MPEG standards focus upon interoperability and
generally are rules about interaction between systems and media files. The
standards define a set of tools that can be used to conduct the compression and
decoding functions. Defining only the interfaces and behavior of the system
facilitates innovation in implementation. For example, as MPEG1 technology has
evolved, the encoders and decoders have improved and offer greater efficiency and
compression, offer faster performance, and deliver better-looking video, and
better-sounding audio.
MPEG-1 An official standard for encoding audio and video adopted in 1992.The simplest of
the MPEG standards, it describes a way to encode audio and video data streams,
along with a way to decode them. While MPEG1 may seem outdated. The default
size for an MPEG1 video is 352x240 at 30fps for NTSC (352x288 at 25fps for PAL
sources). These were designed to give the correct 4:3 aspect ratio when displayed
on the pixels of rectangular TV screens. For a computer-based viewing audience,
320x240 square pixels gives the same aspect ratio.
MPEG-2 ISO/IEC 13818 standard that defines MPEG-2 motion video and audio compression.
It applies to all layers of transmission (video, audio and system).
The MPEG2 standard builds upon MPEG1 to extend it to handle the highest-quality
video applications. MPEG2 is a common standard for digital video transmission at
all parts of the distribution chain. Broadcast distribution equipment, digital cable
headends, video DVDs, and satellite television all employ MPEG2; as do point-topoint
streaming devices.
MPEG2 requires approximately 6 Mbps to provide the quality viewers are
accustomed to seeing on DVDs, although data rates up to 19 Mbps are supported.
720X480 is the typical 4:3 default resolution, while 1920x1080 provides support for
16:9 high-definition television.