AIDC Fundamentals

1
AIDC Fundamentals

• some basic background information

2
AIDC Technologies

• bar coding
• optical character recognition
• magnetic stripe
• voice data entry
• radio frequency identification
• smart cards
• biometrics
• etc.

3
5 Major Activities

• Encode data
• Produce data carrier
• Capture and decode data
• Transmit data
• Apply and use data

4
AIDC Fundamentals

• A Conceptual Framework
• for common understanding

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AIDC Conceptual Framework
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AIDC
7
AIDC
8
AIDC
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Bars, Spaces, Dots, Dashes, Blips and other
things used to ENCODE andDECODE data
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Recognize this?
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Bar Codes

• As an example of encoding and decoding algorithms

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Code 39

• standardized, public domain, free use
• common uses
• industrial
• military
• health
• etc.

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Code 39

• alphanumeric
• 5 bars 4 spaces
• discrete, two width
• start/stop
• self checking

14
GTIN (formerly UCC/EAN)

• standardized, free use,
• numbers administered by EPC. ()
• Common uses
• retail, grocery
• retail, hard goods
• retail, fashion
• retail, anything

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GTIN

• numeric only
• several versions
• 7 modules, 2 bars and 2 spaces
• continuous
• self checking
• parity
• check digit

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PostNet

• standardized, public domain, free use
• common use
• US Postal Service
• speedier service
• discounts for use

Blitzy 1234 W 24 ST MIAMI FL 33020
JAMES F FALES 125 STOCKER CENTER ATHENS OH
45701-2979
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PDF417
James F. Fales, Director Center for Automatic
Identification Ohio University, Russ College of
Engineering and Technology 128 Stocker Center
Athens, OH 45701-2979 [phone], Fax (740)
593-9382
Actual size 1 wide by 1/2 high
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Data Matrix

• standardized, free use
• Common uses
• component marking
• hazardous materials
• medical instruments
• electronics

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Basic Types of Codes

• Bar Codes
• based on bars and/or space widths
• based on bar height
• based on bar position
• based on distances of adjacent bars
• Matrix Codes
• based on dot location within a matrix
• all are binary

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Basic Types of Codes

• Bar Codes
• based on bars and/or space widths

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Basic Types of Codes

• Bar Codes
• based on bar height

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Basic Types of Codes

• Bar Codes
• based on bar position

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Basic Types of Codes

• Bar Codes
• based on distances of adjacent bars

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Basic Types of Codes

• Matrix Codes
• based on dot location within a matrix

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Bar Code Symbology

• a set of RULES governing
• encodation
• symbolic representation
• decodation
• of DATA characters

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Symbology

• specific code
• analogous to language
• many available
• only a few in common use

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Common Symbologies

• GTIN (U.P.C., EAN)
• Code 39
• Interleaved 2 of 5
• Code 128
• PDF417
• Datamatrix
• Maxicode

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Symbology Characteristics

• character set
• character type
• element widths
• length - density
• self checking or error correcting

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Code 39

A
4

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U.P.C. (Version A)
two halves
EAN 13 same basic structure
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What about other forms of AIDC?

• How is data encoded and decoded?

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Magnetic Stripe

• magnetic representation of encoded characters
• F2F encoding scheme

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Yes, something is there
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If you understand bar code symbology

• You can understand the other forms of encoding
  and decoding.