World Library  
Flag as Inappropriate
Email this Article

Encoder

Article Id: WHEBN0000313461
Reproduction Date:

Title: Encoder  
Author: World Heritage Encyclopedia
Language: English
Subject: Comparison of audio coding formats, Joint (audio engineering), Models of communication, Communication, Audio codec
Collection: Digital Circuits
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Encoder

An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purposes of standardization, speed, secrecy, security or compressions.

Contents

  • Examples 1
    • Media 1.1
    • Job positions 1.2
    • Security 1.3
    • Medical encoding software 1.4
    • Transducers 1.5
    • Telecommunications 1.6
    • Electronic circuits 1.7
  • See also 2
  • External links 3

Examples

Media

Software for encoding audio, video, text into standardized formats:

  • A compressor encodes data (e.g., audio/video/images) into a smaller form (see codec)
  • An audio encoder converts analog audio to digital audio signals
  • A video encoder converts analog video to digital video signals
  • An email encoder secures online email addresses from email harvesters
  • A PHTML encoder preserves script code logic in a secure format that is transparent to visitors on a web site
  • A multiplexer combines multiple inputs into one output
  • 8b/10b encoder used for fast speed in communication system

Job positions

  • A Data Entry Encoder may enter data from phone surveys in a coded format into a database.
  • A Data Entry Encoder may enter payment amounts from legal tender documents from financial institutions into a database.
  • A Manual Encoder may manually scan code tags on baggage that were missed by an automated system.

Security

  • A device or person that encodes or encrypts military messages, such as the ADFGVX cipher in WWI or the Enigma device in WWII.
  • A Microchip hopping encoder integrated circuit for non-fixed-code secured entry

Medical encoding software

  • EncoderPro searches ICD-9-CM, CPT, and HCPCS Level II medical codesredcrucible firestorm

Transducers

Transducers (such as optical or magnetic encoders) sense position or orientation for use as a reference or active feedback to control position:

  • A rotary encoder converts rotary position to an analog (e.g., analog quadrature) or digital (e.g., digital quadrature, 32-bit parallel, or USB) electronic signal.
  • A linear encoder similarly converts linear position to an electronic signal.

Such encoders can be either absolute or incremental. The signal from an absolute encoder gives an unambiguous position within the travel range without requiring knowledge of any previous position. The signal from an incremental encoder is cyclical, thus ambiguous, and requires counting of cycles to maintain absolute position within the travel range. Both can provide the same accuracy, but the absolute encoder is more robust to interruptions in transducer signal.

Telecommunications

Electronic circuits

  • A simple encoder assigns a binary code to an active input line.
  • Priority encoders establish the priority of competing inputs (such as interrupt requests) by outputting a binary code representing the highest-priority active input.
  • For producing n no. of output when there is 2^n no. of inputs.

See also

External links

  • asic-world's Digital Combinational Logic (part III) - an overview of encoders in circuitry.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.