Foreword
Introduction
Scope
Normative references
Terms, definitions, symbols and functions
Terms and definitions
Symbols and functions
Mathematical symbols
Mathematical functions and operations
Symbology characteristics
Basic characteristics
Summary of additional features
Symbol description
Basic Aztec Code properties
Symbol structure
Aztec code layout
Core Symbol
Core Symbol position and content
Finder pattern
Orientation patterns
Mode message
Data fields
Reference grid
Data layers
Symbol character structure and sequence
Symbol size and capacity
General encodation procedures
Symbol structure
Fixed pattern structures
Fixed pattern types
Finder
Orientation bits
Reference grid
Mode message encoding and structure
Mode message
Symbol size designator
Message length designator
Error encodation for the mode message
Module placement for the mode message
Data message encoding and structure
Data message
Source message encoding
Sequence of data characters
Translation into a binary stream
Formation of data codewords
Error encodation for the data message
Module placement for the data message
Structured Append
Reader initialization symbols
Extended Channel Interpretation (ECI)
ECI basic information and references
Encoding ECIs in Aztec Code
Code sets and ECIs
ECIs and Structured Append
Post-decode protocol
User considerations
Choice of data and error correction level
User selection of encoded message
User selection of minimum error correction level
User selection of Structured Append
User selection of optional symbol formats
Dimensions
User guidelines
Human readable interpretation
Autodiscrimination capability
User-defined application parameters
Reference decode algorithm
General
Finding candidate symbols
Processing the bullseye image
Decoding the Core Symbol
Bullseye mapping of module centres
Mapping and sampling module centres
Determining video sign and symbol format
Determining symbol orientation and mirror image reversal
Decoding the mode message
Decoding the data message
General
Mapping the data layers
Assembling the codewords
Checking the codewords
Translating the datawords
Bit stream conversion and interpretation
Creating the data bit stream
Interpreting the bit stream
Symbol quality
Quality assessment method
Symbol quality parameters
Fixed pattern damage (FPD)
Axial non-uniformity (AN)
Unused error correction
“Print” growth
Grid non-uniformity
Symbol print quality grading
Symbol grade
Additional print process control measurements
Transmitted data
Basic interpretation
Protocol for FNC1
Protocol for ECIs
Symbology identifier
Transmitted data example
Aztec Runes (normative)
Symbol description
Data message encoding
Data message decoding
Transmitted data
Error detection and correction (normative)
General
Generating the error correction codewords
Error correction capacity
Error correction method
Topological bullseye search algorithm (normative)
Linear crystal growing algorithm (normative)
Fixed pattern damage (FPD) grading (normative)
Features to be assessed
Grading criteria and assignments
Symbology identifiers (normative)
Aztec Code symbol encoding example (informative)
General
Creating the message bit stream
Selecting symbol format and size
Creating the data codeword stream
Adding the Reed-Solomon checkwords
Assembling the mode message
Graphically assembling the symbol
Achieving minimum symbol size (informative)
Useful process control techniques (informative)
General
Symbol contrast
Special reference symbols
Assessing axial non-uniformity (AN)
Visual inspection for defects
Bibliography