
Glossary
Reference Guide: RX1290 H.264 Contribution Receiver Page A-5
ST.RE.E10228.1
Earth Technical Earth: Ensures that all equipment chassis within a rack are at the same potential,
usually by connecting a wire between the Technical earth terminal and a suitable point on the
rack. This is sometimes known as a Functional earth.
Protective Earth: Used for electric shock protection. This is sometimes known as a safety
earth.
EBU European Broadcast Union.
ECM Entitlement Control Message.
EDI Ethernet Data Input
EIA Electronics Industries Association (USA).
EIT 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.
Elementary Stream A generic term for a coded bit-stream, be it video, audio or other.
EMC Electromagnetic Compatibility.
EMM Entitlement Management Message.
Encryption Encoding of a transmission to prevent access without the appropriate decryption equipment
and authorisation.
EPG Electronic Programme Guide: On-screen programme listing using thumbnail pictures and/or
text.
Ethernet 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.
ETS European Telecommunications Standard.
ETSI European Telecommunications Standards Institute.
FBAS German for CVBS
FCC Federal Communications Commission.
FDM Frequency Division Multiplex: A common communication channel for a number of signals,
each with its own allotted frequency.
FEC 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.
FFT Fast Fourier Transformation: A fast algorithm for performing a discrete Fourier transform.
FIFO 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.
FM Frequency Modulation: Analogue modulation procedure
Footprint 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.
Kommentare zu diesen Handbüchern