Appendix 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-Sub15-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).

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