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 (widescreen) or 4:3 (the traditional screen ratio). 16:9 is more ergonomically suitable for the human eye.
*Bandwidth : Frequency range allows for carrying a certain radio signal. The speed of data transmission depends on the available bandwidth of the transmission channel.
*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 colours. 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.
*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
*EPG : Abbreviation for "Electronic Program Guide". Software that enable viewers to navigate through the large number of channels offered by digitalTV broadcaster and select the desired services.
*Frequency :The property of a signal which is measured in cycles per second(=Hertz).
*HDCP : HDCP is a specification developed by Intel Corporation to protect digital entertainment content access the HDMI interface.
*HDMI : Abbreviation for
*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.
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