In general, the channel will distort the message and add noise to it. In order to avoid the distortion, and to reduce the effect of the noise to any desired degree, an encoder is placed between the source and the channel, and a decoder is placed between the channel and the destination. Now, the source sends the transmitted message, which is encoded as the transmitted signal; this is sent through the channel. It emerges as the received signal, which is decoded to give the received message; this arrives at the destination.
The channel is considered to have a noise source that inputs “information” in addition to that in the transmitted signal. The aim of the encoder and decoder is to make the received message resemble, as closely as required, the transmitted message, in spite of the “information” from the noise source.
See also source coding theorem, channel coding theorem.
"Shannons model." A Dictionary of Computing. . Encyclopedia.com. (October 15, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/shannons-model
"Shannons model." A Dictionary of Computing. . Retrieved October 15, 2018 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/shannons-model
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.