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4 GLOSSARY
* 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 recorder.
* 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.
* 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:
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 broadcasters.
* Frequency:
The property of a signal measured in cycles per second (=Hertz).
* HDCP:
HDCP is a specification developed by Intel Corporation to protect digital entertainment content across
the HDMI interface.
* HDMI:
Abbreviation for High-Definition Multimedia Interface. HDMI combines high-definition video and multi-
channel audio in a single digital interface to provide crystal-clear digital quality over a single cable.
* 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.
* PVR:
Abbreviation for Personal Video Recorder. Provides settings for recording purposes.
* 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 represents
brightness and C represents color. S-Video cables have separate wires for the color and brightness so it offers
a better picture quality than the composite video.
* VHF:
Stands for "Very High Frequency", starts from 30 to 300MHz corresponding to channels 2-12, including
Bands I, II and III.
* Video format:
It is the picture resolution of the video defined as number of pixels per line x number of
horizontal lines, interlaced/progressive.
For Standard Definition (SD), the picture resolution is 720 pixels
×
576 lines, interlaced (576i).
APPENDIX
APPENDICES