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Media Control and the Influence of Public Discourse |
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As citizens rely on information to make political choices, media are an important element in the process of public opinion formation. They decide which topics and issues are on the agenda or not; which individuals or societal groups are given broadcasting time or publishing space and which aspects and facts are presented or suppressed. Media therefore have the ability to influence public opinion and those controlling the media are to a certain extent capable of altering the nature of discourse in their desired direction.
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Bandwidth
The bandwidth of a transmitted communications signal is a measure of the range of frequencies the signal occupies. The term is also used in reference to the frequency-response characteristics of a communications receiving system. All transmitted signals, whether analog or digital, have a certain bandwidth. The same is true of receiving systems.
Generally speaking, bandwidth is directly proportional to the amount of data transmitted or received per unit time. In a qualitative sense, bandwidth is proportional to the complexity of the data for a given level of system performance. For example, it takes more bandwidth to download a photograph in one second than it takes to download a page of text in one second. Large sound files, computer programs, and animated videos require still more bandwidth for acceptable system performance. Virtual reality (VR) and full-length three-dimensional audio/visual presentations require the most bandwidth of all.
In digital systems, bandwidth is data speed in bits per second (bps).
Source: Whatis.com
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