The SAGE Key Concepts series provide students with accessible and authoritative knowledge of the essential topics in a variety of disciplines. Cross-referenced throughout, the format encourages critical evaluation through understanding. Written by experienced and respected academics, the books are indispensable study aids and guides to comprehension. Key Concepts in Journalism offers a systematic and accessible introduction to the terms, processes, and effects of journalism;a combination of practical considerations with theoretical issues; and further reading suggestions. The authors bring an enormous range of experience in newspaper and broadcast journalism, at national and regional level, as well as their teaching expertise. This book will be essential reading for students in journalism, and an invaluable reference tool for their professional careers.



In electronic communication terms, bandwidth is the difference in the range of frequencies used on a particular transmission channel. Signal frequency is measured in hertz, which is the number of cycles of change per second (, 2004).

Bandwidth is also used in computer terminology as the amount of digital data, measured in bits (short for binary digits) per second (J. Hall, 2001: 247), that can be transmitted along a network. It ranges from narrowband (the conventional dial-up method on a computer) to highspeed delivery known as broadband which allows users to view pages on the world wide web faster, send and receive emails without delay, download files quicker and always-on access to the Internet (BBCi, 2003).

Feldman and De Wolk both use the common analogy of a ...

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