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Chapter 2 Introduction to Digital Communications - Pg. 51

2 Introduction to Digital Communications 2.1 Introduction Digital communications refer to the exchange of digital information (electronically) from one location (source) to another (destination). It requires an electronic system at the source to convert the information from its natural form in analogue ­ such as a human voice ­ video picture or music to digits ­ such as binary-coded numbers, graphic symbols, microproces- sor codes or data-base information. These digits are then processed (compressed, filtered, pulse shaped) to a form most suitable for sending (transmitting) over the media (channel).