Digital+radio+and+TV+-+Romeo

=tjeripo tjiramba= =**__Digital radio and TV__**=

====DIGITAL RADIO Digital radio describes radio technologies which carry information as a digital signal, by means of a digital modulation method. The most common meaning is digital audio broadcasting technologies, but the topic may also cover TV broadcasting, two-way digital wireless communication technologies, and radio delivered via the Internet.==== **What is digital radio?**

There are several different ways in which digital radio signals can be transmitted, but currently, the leading technology is DAB (Digital Audio Broadcasting).DAB digital Radio allows a number of different radio services to be broadcast on just one frequency, by ‘bundling’ them together on what is known as a ‘multiplex’ (although you need a DAB-compatible radio set in order to receive them, since analogue sets are unable to decode the digital signal).
 * Radio and television services in the UK are going digital.
 * ====Digital technology enables the pictures and sounds to be converted into computerised bits of information that take up much less space in the airwaves than traditional (analogue) radio and television signals – which in turn means that there is room for more TV channels or radio stations, and space for additional features, like electronic programme listings.====

====Digital television (DTV) is the transmission of audio and video by discrete (digital) signals, in contrast to the analog signals used by analog TV. It is gradually replacing analog TV, and has done so in several industrialized nations.DTV has several advantages over analog TV, the most significant being that digital channels take up less bandwidth, and the bandwidth needs are continuously variable, at a corresponding reduction in image quality depending on the level of compression as well as the resolution of the transmitted image.==== ====The adoption of a broadcast standard incompatible with existing analog receivers has created the problem of large numbers of analog receivers being discarded during digital television transition. An estimated 99 million unused analog TV receivers are currently in storage in the US alone and, while some obsolete receivers are being retrofitted with converters, many more are simply dumped in landfills where they represent a source of toxic metals such as lead as well as lesser amounts of materials such as barium, cadmium and chromium.====
 * DIGITAL TV**