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4 GLOSSARY
APPENDIX
* Aspect Ratio:
It is the ratio of the width of the screen to the height. The two relevant digital TV formats
are 16:9 (wide-screen) or 4:3 (the traditional screen ratio). 16:9 is more ergonomically suitable for the
human eye.
* Bandwidth:
It is the frequency range that allows for carrying a certain radio signal.
* Coaxial Cable:
A type of cable used to transmit high frequency signals e.g. from the VHF/UHF
antenna to the terrestrial Digital TV receiver.
* Composite Video:
There are three elements of the video system: First - the "active video" which
means the picture to be displayed on the screen and its associated colors; second - the "sync" decides
where to place each pixel on the screen; third - the "blanking” tells the display when to turn off the
electron beam so no retrace across the screen. These three elements combined together is called
"composite video" when connecting to a display through connectors.
* Crop:
A wide-screen 16:9 picture that is cut on both left and right to fit a 4:3 TV screen.
* Dolby® Digital:
Dolby® Digital is a method of transmitting and storing multi-channel soundtracks via
newer digital media such as DVD, digital cable, digital TV (DTV), and satellite transmissions.
* DVB
5
: Abbreviation for "Digital Video Broadcasting". An international organization created in October
1993, whose primary objective is to achieve a common framework for all technical platforms of digital
broadcasting systems including DVB-C (cable), DVB-S (satellite) and DVB-T (terrestrial), etc
.
* EPG:
Stands for "Electronic Program Guide". It is an application that allows viewers to navigate
through the large number of channels offered by digital TV broadcaster and selects the desired
services.
* Frequency: The property of a signal measured in cycles per second (=Hertz).
* Letterbox: The picture with aspect ratio 16:9 in a 4:3 TV screen with blank lines on top and bottom. It
is the means to watch a wide screen TV program on a 4:3 TV screen.
* Megahertz (MHz): Millions of cycles per second, which describes frequencies of radio wave or electric
current.
* Mini D-Sub 15-pin Cable: A type of video cable used to carry analogue RGB video signals.
* OSD
: Stands for "On Screen Display". It provides clearer menu functions by using the TV or monitor to
display the menu while the controls are on the remote control.
* PAL: Stands for "Phase Alternating Line", the European video standard that has the image format of 4
by 3, 625 horizontal lines, 50Hz field frequency and a total 8 MHz of video channel width.
* Pillarbox: The picture with aspect ratio 4:3 in a 16:9 TV screen with black masking bars on the left and
right. It is a way to watch a standard 4:3 picture on a wide-screen TV.
* RF Channel:
Radio Frequency Channel, for instance channel 28 for SBS Network in analogue TV
transmission. However, in digital TV, one RF channel may carry 4 to 6 sub-channels like SBS HD and
SBS Digital.
* RGB:
Stands for Red, Green and Blue. RGB video is the highest quality video currently used in the AV
industry.
* S-Video (also called Y/C):
The standard for the way a video signal is carried on the cable. Y
5
Trade Mark of the DVB Digital Video Broadcasting Project (1991 to 1996)
Product registration identification reference number: 3025.
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