TANDBERG TT1220 Instruction Manual page 66

Glossary
EBU
ECM
EDI
EIA
EIT
Elementary Stream
EMC
EMM
Encryption
EPG
Ethernet
ETS
ETSI
FCC
FDM
FEC
FFT
FIFO
Footprint
FTP
G.703
GOP
GUI
HDTV
HPA
HSYNC
Hub
ICAM
IEC
IF
Page A-4
European Broadcast Union.
Entitlement Control Message.
Ethernet Data Input
Electronics Industries Association (USA).
Event Information Table: Equipment: A component of the DVB-Service Information (SI) stream generated within
an Encoder, containing information about events or programmes such as event name, start time, duration, etc.
System: EIT (Present/Following) contains the name of the current and next event. It may include an optional
descriptor (synopsis) giving brief details of content. EIT (Schedule) is used to produce a full EPG. The EIT is the
only DVB-SI table, which can be encrypted.
A generic term for a coded bit-stream, be it video, audio or other.
Electromagnetic Compatibility.
Entitlement Management Message.
Encoding of a transmission to prevent access without the appropriate decryption equipment and authorisation.
Electronic Programme Guide: On-screen programme listing using thumbnail pictures and/or text.
The most widely used local area network (LAN) defined by the IEEE as the 802.3 standard. Transmission speeds
vary according to the configuration. Ethernet uses copper or fibre-optic cables.
European Telecommunications Standard.
European Telecommunications Standards Institute.
Federal Communications Commission.
Frequency Division Multiplex: A common communication channel for a number of signals, each with its own
allotted frequency.
Forward Error Correction: A method of catching errors in a transmission. The data is processed through an
algorithm that adds extra bits and sends these with the transmitted data. The extra bits are then used at the
receiving end to check the accuracy of the transmission and correct any errors.
Fast Fourier Transformation: A fast algorithm for performing a discrete Fourier transform.
First In, First Out: A data structure or hardware buffer from which items are taken out in the same order they
were put in. Also known as a shelf from the analogy with pushing items onto one end of a shelf so that they fall off
the other. A FIFO is useful for buffering a stream of data between a sender and receiver that are not synchronised
- i.e. they not sending and receiving at exactly the same rate.
The area of the Earth's surface covered by a satellite's downlink transmission. Also (generally) the area from
which the satellite can receive uplink transmissions.
File Transfer Protocol: A protocol used to transfer files over a TCP/IP network (Internet, UNIX, etc.). For
example, after developing the HTML pages for a Web site on a local machine, they are typically uploaded to the
Web server, using FTP. Unlike e-mail programs in which graphics and program files have to be attached, FTP is
designed to handle binary files directly and does not add the overhead of encoding and decoding the data.
The ITU-T standard which defines the physical and electrical characteristics of hierarchical digital interfaces.
Group of Pictures: MPEG video compression works more effectively by processing a number of video frames as
a block. The TANDBERG Television Encoder normally uses a 12 frame GOP; every twelfth frame is an I frame.
Graphical User Interface: The use of pictures rather than just words to represent the input and output of a
program. A program with a GUI runs under a windowing system and has a screen interface capable of displaying
graphics in the form of icons, drop-down menus and a movable pointer. The on-screen information is usually
controlled / manipulated by a mouse or keyboard.
High Definition Television.
High Power Amplifier: Used in the signal path to amplify the modulated and up-converted broadcast signal for
feeding to the uplink antenna.
Horizontal (line) SYNCs.
A device in a multipoint network at which branch nodes interconnect.
Integrated Conditional Access Module: Embedded in the IRD and responsible for descrambling, plus packet
filtering and reception. It also contains the physical interface to the subscriber's viewing card.
International Electrotechnical Committee.
Intermediate Frequency: Usually refers to the 70 MHz or 140 MHz output of the Modulator in cable, satellite and
terrestrial transmission applications.
Instruction Manual: TT1220 Professional Receivers and Decoders
ST.TM.TT1220.4