10 Technical Terms
Antenna cable:
Connecting cable between the modulator of the satellite recei-
ver and the antenna input of the television set. Used as an
alternative where no SCART socket is availabe
AV: see SCART
Data compression/MPEG1/MPEG2:
The current television standard (625 lines and 50 Hz picture
repeat frequency) provides a digital data volume of 216 MBit/s.
This would require bandwidths simply not available either ter-
restrially or via satellite. The data volume is thus reduced by
means of a data reduction system. For Europe, the internatio-
nally determined standard for data compression is MPEG-2.
MPEG-2 is an expanded version of MPEG-1
DVB:
Digital Video Broadcasting: A universal digital transmission
technology used to transmit pictures, graphics, sound and
text, as well as for data in every conceivable form and in
every possible, appropriate quality.
DVB-T receiver:
The signals received from the antenna cannot be processed
by the television set. They are processed in the DVB-T recei-
ver so that audio and video signals (AV) are made available
at the receiver outputs which are passed on to the television
set in a form the TV set can use.
Frequency:
A physical unit of measurement, indicates the number of oscil-
lations per second, the unit of measurement is Hertz (Hz)
Channel:
Part of a frequency band, which is allocated according to a
specific allocation protocol. A TV channel consists of two fre-
quencies, one for the visual and one for the audio content.
Each channel is designated by a numeric identifier (with the
exception of European television channels broadcast on the
frequency band 40 – 230 MHz, which are designated by let-
ters).
Co-axial cable:
Connection cable between LNC and satellite receiver, used to
transmit the signals received and to supply power to the
LNC.
Modulator:
Switch in the satellite receiver or video recorder used to con-
nect the television set via antenna cable
OSD
O
n
S
creen
D
isplay (information displayed on TV screen).
PID
P
acket
Id
entifier, or Packet ID, specific numeric values used
to identify programmes.
Receiver:
The signals received from the antenna cannot be processed
50
Summary of Contents for DigiCorder T1
Page 57: ...57...
Page 61: ...61 DigiCorder T1...
