Encoder: Difference between revisions

Revision as of 07:45, 27 March 2006

Revision as of 10:52, 30 March 2006

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[[Image:Encoder_Example.svg|thumb|right|Example: A Single Bit 4-to-2 Line Encoder]]

An '''encoder''' is a [[device]] used to change a [[Signalling (telecommunication)|signal]] (such as a [[bitstream]]) or [[data]] into a [[code]]. The code may serve any of a number of purposes such as compressing information for [[transmission (telecommunications)|transmission]] or [[Computer storage|storage]], [[encrypting]] or adding [[Redundancy_Redundancy (information_theoryinformation theory)|redundancies]] to the input code. translating from one code to another. This is usually done by means of a programmed [[algorithm]], especially if any part is [[digital]], while most [[analog (signal)|analog]]ue encoding is done with [[analog circuit|analog circuitry]].

Examples:

* a [[rotary encoder]] is a sensor or transducer for converting rotary motion or position to a code of electronic pulses.

* a [[multiplexer]] combines multiple inputs into one output.

* a [[Data_compressionData compression|Compressor]] is used to encode data into a smaller form.

==See also==

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*[[line code]]

*[[modulation]]

*[[Database_normalizationDatabase normalization|Redundancy in databases]]

==External links==

*[http://www.asic-world.com/digital/combo3.html asic-world's Digital Combinational Logic (part III)] - a very good overview of encoders.

[[Category:Electronics]]