ISO/IEC 24728:2006

Information technology — Automatic identification and data capture techniques — MicroPDF417 bar code symbology specification

ISO/IEC 24728:2006 specifies the requirements for the bar code symbology known as MicroPDF417. It specifies the MicroPDF417 symbology characteristics, data character encodation, symbol formats, dimensions, error correction rules, decoding algorithm, and a number of application parameters. MicroPDF417 is a multi-row symbology, derived from and closely based on PDF417. MicroPDF417 is designed for applications with a need for improved area efficiency but without the requirement for PDF417's maximum data capacity. A limited set of symbol sizes is available, together with a fixed level of error correction for each symbol size. Module dimensions are user-specified to enable symbol production and reading by a wide variety of techniques. Since MicroPDF417's data character encodation, its error correction method, and many of its other symbol characteristics are, and are intended to remain, identical to those of PDF417, descriptions of these characteristics are quoted verbatim from the PDF417 symbology specification (ISO/IEC 15438) wherever appropriate, or with the appropriate modifications. For ease of cross-reference, ISO/IEC 24728:2006 follows a similar document structure, with minor differences in clause/subclause numbering, to the PDF417 symbology specification.

Technologies de l'information — Techniques automatiques d'identification et de capture des données — Spécifications pour la symbologie de code à barres MicroPDF417

General Information

• Status: Published
• Publication Date: 23-May-2006
• ICS: 35.040 - Information coding
• ICS: 35.040.50 - Automatic identification and data capture techniques
• Technical Committee: ISO/IEC JTC 1/SC 31 - Automatic identification and data capture techniques
• Drafting Committee: ISO/IEC JTC 1/SC 31/WG 1 - Data carrier
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Apr-2025
• Completion Date: 15-Apr-2025

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 24728
First edition
2006-06-01
Information technology — Automatic
identification and data capture
techniques — MicroPDF417 bar code
symbology specification
Technologies de l'information — Techniques d'identification
automatique et de capture des données — Spécifications pour la
symbologie de code à barres MicroPDF417

Reference number
©
ISO/IEC 2006
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ii © ISO/IEC 2006 – All rights reserved

Contents Page
Foreword. vi
Introduction . vii
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Symbols, operations and abbreviated terms.4
4.1 Symbols .4
4.2 Mathematical operations.5
4.3 Abbreviated terms .5
5 Requirements.5
5.1 Symbology characteristics .5
5.1.1 Basic characteristics.5
5.1.2 Summary of additional features.6
5.2 Symbol structure .7
5.2.1 MicroPDF417 symbol parameters.7
5.2.2 Row and column combinations.9
5.2.3 Row parameters.10
5.2.4 Codeword sequence.10
5.2.5 MicroPDF417 Row Address Patterns.12
5.3 Basic encodation .14
5.3.1 Symbol character structure .14
5.3.2 Start and Stop Patterns.15
5.4 High level (data) encodation.15
5.4.1 Function codewords.15
5.4.2 Text Compaction mode .21
5.4.3 Byte Compaction mode.25
5.4.4 Numeric Compaction mode .27
5.4.5 Advice to select the appropriate compaction mode .28
5.4.6 Treatment of MicroPDF417 reserved codewords.29
5.5 Extended Channel Interpretation .29
5.5.1 Encoding the ECI assignment number.30
5.5.2 Pre-assigned and default Extended Channel Interpretations .31
5.5.3 Encoding ECI sequences within compaction modes .31
5.5.4 Post-decode protocol.33
5.6 Determining the codeword sequence.33
5.7 Error detection and correction.34
5.7.1 Number of error correction codewords.34
5.7.2 Error correction capacity .34
5.7.3 Defining the error correction codewords.35
5.8 Dimensions.35
5.8.1 Minimum width of a module (X).35
5.8.2 Row height (Y).35
5.8.3 Quiet zones.35
5.9 Defining the symbol format .35
5.9.1 Defining the aspect ratio of the module .36
5.9.2 Defining the symbol matrix of rows and columns .36
5.10 Generating the error correction codewords .37
5.11 Low level encodation .39
5.11.1 Clusters.40
© ISO/IEC 2006 – All rights reserved iii

5.11.2 Determining the symbol matrix . 40
5.11.3 Determining the values of the Row Address Patterns . 40
5.11.4 Row encoding. 46
5.12 Printing Row Address Patterns . 46
5.13 Structured Append. 47
5.13.1 Compaction modes and Structured Append. 47
5.13.2 ECIs and Structured Append . 47
5.14 User guidelines . 47
5.14.1 Human readable interpretation. 47
5.14.2 Autodiscrimination capability. 47
5.14.3 User-defined application parameters. 48
5.14.4 MicroPDF417 symbol quality . 48
5.14.5 Separation of multiple symbols. 49
5.15 Reference decode algorithm. 49
5.16 Error detection and error correction procedure . 49
5.17 Transmitted data . 49
5.17.1 Transmitted data in the basic (default) interpretation. 49
5.17.2 Transmission protocol for Extended Channel Interpretation (ECI) . 49
5.17.3 Transmitted data for Structured Append.51
5.17.4 Transmission of reserved codewords using the ECI protocol. 51
5.17.5 Symbology identifier. 51
5.17.6 Transmission using older protocols. 51
Annex A (normative) Encoding/decoding table of PDF417 symbol character bar-space sequences. 52
Annex B (normative) The default character set for Byte Compaction mode . 67
Annex C (normative) Byte Compaction mode encoding algorithm . 68
Annex D (normative) Numeric Compaction mode encoding algorithm. 70
Annex E (normative) Error correction . 72
Annex F (normative) Tables of coefficients for calculating MicroPDF417 error correction
codewords . 73
Annex G (normative) Text Compaction mode encoding algorithm. 77
Annex H (normative) Structured Append MicroPDF417 symbols . 78
H.1 Structured Append overview . 78
H.2 Structured Append syntax . 78
H.3 High level encoding considerations . 81
H.4 Encodation example . 81
H.5 Structured Append and the Extended Channel Interpretation protocol . 82
H.6 Structured Append data transmission. 83
Annex I (normative) Testing MicroPDF417 symbol quality. 86
I.1 Overview of methodology . 86
I.2 Test scans for scan reflectance profile . 86
Annex J (normative) Referen
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