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Glossary
296 Amethyst III DTV Smart Switch
User Manual
CrCb Digital Color difference signals. These signals, in combination with the
luminance signal (Y), define the color and brightness of each picture
element (pixel) on a TV line.
See: Chrominance.
CVCT Cable Virtual Channel Table (ATSC).
Decoder The device containing the electronic circuitry necessary to decode
encrypted signals. Some Decoders features a receiver.
DTS Decoding Time Stamp
DVB Digital Video Broadcasting
The Digital Video Broadcasting Project (DVB) is an industry-led consortium
of around 250 broadcasters, manufacturers, network operators, software
developers, regulatory bodies and others in over 35 countries committed
to designing open technical standards for the global delivery of digital
television and data services. Services using DVB standards are available
on every continent with more than 500 million DVB receivers deployed.
DVB-T Digital Video Broadcasting baseline system for digital terrestrial television
(first generation)
DVB-T2 Digital Video Broadcasting baseline system for digital terrestrial television
(second generation)
ECM Entitlement Control Message.
Private Conditional Access information that specifies control words and
possibly other stream-specific, scrambling, and/or control parameters.
EDH Error Detection and Handling.
EDH protocol allows an SD-SDI receiver to verify that each field of video is
received correctly. EDH is used primarily to assist in identifying faulty
equipment in a video chain so that it can be quickly replaced or repaired.
The SD-SDI EDH protocol is defined by SMPTE RP 165-1994 and the
equivalent ITU standard ITU-R BT.1304
EIT Event Information Table
A mandatory Digital Video Broadcast (DVB) SI table that transmits
information relating to the events in the MPEG transport stream.
EMC Electromagnetic Compatibility.
EMM Entitlement Management Message.
Private Conditional Access information that specifies the authorization
level or services of specific decoders.
Ethernet The most widely used local area network (LAN) defined by the IEEE as the
802.3 standard.
FEC Forward Error Correction.
It is a system of error control for data transmission, whereby the sender
adds systematically generated redundant data to its messages. The
carefully designed redundancy allows the receiver to detect and correct a
limited number of errors occurring anywhere in the message without the
need to ask the sender for additional data. FEC gives the receiver an ability
to correct errors without needing a reverse channel to request
retransmission of data, but this advantage is at the cost of a fixed higher
forward channel bandwidth.