1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22032-7 SANS 15438:2008Edition 1 ISO/IEC 15438:2006Edition 2SOUTH AFRICAN NATIONAL STANDARD Information technology Automatic identificatio
4、n and data capture techniques PDF417 bar code symbology specification Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This national standard is the identical implementation of ISO/IEC 15438:
5、2006 and is adopted with the permission of the International Organization for Standardization and the International Electrotechnical Commission. SANS 15438:2008 Edition 1 ISO/IEC 15438:2006 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by
6、 National Committee SABS SC 71K, Information technology Automatic identification and data capture techniques, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2008. Reference numberISO/IEC
7、 15438:2006(E)ISO/IEC 2006INTERNATIONAL STANDARD ISO/IEC15438Second edition2006-06-01Information technology Automatic identification and data capture techniques PDF417 bar code symbology specification Technologies de linformation Techniques didentification automatique et de capture des donnes Spcifi
8、cations pour la symbologie de code barres PDF417 SANS 15438:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 15438:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, thi
9、s file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secreta
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11、e that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or uti
12、lized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax
13、 + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2006 All rights reservedSANS 15438:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 15438:2006(E) ISO/IEC 2006 All rights reserved iiiCo
14、ntents Page Foreword vi Introduction vii 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Symbols, operations and abbreviated terms. 3 4.1 Symbols . 3 4.2 Mathematical operations 4 4.3 Abbreviated terms 4 5 Requirements 5 5.1 Symbology characteristics 5 5.1.1 Basic characteristics
15、 5 5.1.2 Summary of additional features 6 5.2 Symbol structure 7 5.2.1 PDF417 symbol parameters. 7 5.2.2 Row parameters 7 5.2.3 Codeword sequence. 7 5.3 Basic encodation 8 5.3.1 Symbol character structure . 8 5.3.2 Start and stop characters 9 5.4 High level (data) encodation 10 5.4.1 Function codewo
16、rds. 10 5.4.2 Text Compaction mode 13 5.4.3 Byte Compaction mode 17 5.4.4 Numeric Compaction mode . 19 5.4.5 Advice to select the appropriate compaction mode . 21 5.4.6 Treatment of PDF417 reserved codewords 21 5.5 Extended Channel Interpretation 21 5.5.1 Encoding the ECI assignment number. 22 5.5.2
17、 Pre-assigned and default Extended Channel Interpretations 23 5.5.3 Encoding ECI sequences within compaction modes . 23 5.5.4 Post-decode protocol. 25 5.6 Determining the codeword sequence.25 5.7 Error detection and correction 26 5.7.1 Error correction level 26 5.7.2 Error correction capacity . 26 5
18、.7.3 Defining the error correction codewords.27 5.8 Dimensions 27 5.8.1 Minimum width of a module (X). 27 5.8.2 Row height (Y) 28 5.8.3 Quiet zones 28 5.9 Defining the symbol format . 28 5.9.1 Defining the aspect ratio of the module . 28 5.9.2 Defining the symbol matrix of rows and columns 28 5.10 G
19、enerating the error correction codewords 30 5.11 Low level encodation 31 5.11.1 Clusters 32 5.11.2 Determining the symbol matrix . 32 5.11.3 Determining the values of the left and right row indicators. 32 SANS 15438:2008This s tandard may only be used and printed by approved subscription and freemai
20、ling clients of the SABS .ISO/IEC 15438:2006(E) iv ISO/IEC 2006 All rights reserved5.11.4 Row encoding 33 5.12 Compact PDF417. 33 5.13 Macro PDF417 33 5.13.1 Compaction modes and Macro PDF417 . 34 5.13.2 ECIs and Macro PDF417 . 34 5.14 User guidelines . 34 5.14.1 Human readable interpretation 34 5.1
21、4.2 Autodiscrimination capability 34 5.14.3 User-defined application parameters 34 5.14.4 PDF417 symbol quality. 35 5.15 Reference decode algorithm 35 5.16 Error detection and error correction procedure 35 5.17 Transmitted data . 35 5.17.1 Transmitted data in the basic (default) interpretation. 35 5
22、.17.2 Transmission protocol for Extended Channel Interpretation (ECI) . 36 5.17.3 Transmitted data for Macro PDF417 . 37 5.17.4 Transmission of reserved codewords using the ECI protocol. 37 5.17.5 Symbology identifier. 37 5.17.6 Transmission using older protocols. 37 Annex A (normative) Encoding/dec
23、oding table of PDF417 symbol character bar-space sequences. 39 Annex B (normative) The default character set for Byte Compaction mode . 55 Annex C (normative) Byte Compaction mode encoding algorithm 56 Annex D (normative) Numeric Compaction mode encoding algorithm 58 Annex E (normative) User selecti
24、on of error correction level . 60 E.1 Recommended minimum error correction level 60 E.2 Other user consideration of the error correction level . 60 Annex F (normative) Tables of coefficients for calculating PDF417 error correction codewords 61 Annex G (normative) Compact PDF417 . 66 G.1 Description.
25、 66 G.2 Print quality 66 Annex H (normative) Macro PDF417. 67 H.1 Macro PDF417 overview . 67 H.2 Macro PDF417 syntax . 67 H.3 High level encoding considerations . 70 H.4 Encodation example . 70 H.5 Macro PDF417 and the Extended Channel Interpretation protocol . 71 H.6 Macro PDF417 data transmission
26、. 72 Annex I (normative) Testing PDF417 symbol quality 75 Annex J (normative) Reference decode algorithm for PDF417 . 76 J.1 Initialisation . 76 J.2 Reference decode algorithm for line decoding 76 J.3 Filling the matrix . 78 J.4 Interpretation . 79 Annex K (normative) Error correction procedures . 8
27、0 Annex L (normative) Symbology identifier 82 Annex M (normative) Transmission protocol for decoders conforming with original PDF417 standards . 83 M.1 Basic Channel mode. 83 M.2 GLI encoded symbols. 83 M.3 Macro PDF417 symbols 85 M.4 Transmission of reserved codewords using the original PDF417 prot
28、ocol . 86 M.5 Achieving compatibility between old and new PDF417 equipment. 86 Annex N (informative) Algorithm to minimise the number of codewords 89 SANS 15438:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 15438:2006(E) ISO/IEC
29、 2006 All rights reserved vAnnex O (informative) Guidelines to determine the symbol matrix 91 O.1 Parameters affecting the determination of the matrix 91 O.2 Guidelines should any parameters not be achieved. 94 Annex P (informative) Calculating the coefficients for generating the error correction co
30、dewords worked example. 95 Annex Q (informative) Generating the error correction codewords - worked example 96 Annex R (informative) Division circuit procedure for generating error correction codewords. 99 Annex S (informative) Additional guidelines for the use of PDF417. 100 S.1 Autodiscrimination
31、compatibility 100 S.2 Pixel-based printing 100 Bibliography . 102 SANS 15438:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 15438:2006(E) vi ISO/IEC 2006 All rights reservedForeword ISO (the International Organization for Standar
32、dization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organizatio
33、n to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, IS
34、O and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted
35、 by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of pa
36、tent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 15438 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Automatic identification and data capture techniques. This second edition cancels a
37、nd replaces the first edition (ISO/IEC 15438:2001), which has been technically revised. SANS 15438:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 15438:2006(E) ISO/IEC 2006 All rights reserved viiIntroduction The technology of ba
38、r coding is based on the recognition of patterns of bars and spaces of defined dimensions. There are various methods of encoding information in bar code form, known as symbologies, and the rules defining the translation of characters into bars and space patterns and other essential features are know
39、n as the symbology specification. Manufacturers of bar code equipment and users of bar code technology require publicly available standard symbology specifications to which they can refer when developing equipment and application standards. It is the intent and understanding of ISO/IEC that the symb
40、ology presented in this International Standard is entirely in the public domain and free of all user restrictions, licences and fees. SANS 15438:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .This page is intentionally left blankSANS 154
41、38:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO/IEC 15438:2006(E) ISO/IEC 2006 All rights reserved 1Information technology Automatic identification and data capture techniques PDF417 bar code symbology specif
42、ication 1 Scope This International Standard specifies the requirements for the bar code symbology known as PDF417. It specifies PDF417 symbology characteristics, data character encodation, symbol formats, dimensions, error correction rules, reference decoding algorithm, and a number of application p
43、arameters. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 646:199
44、1, Information technology ISO 7-bit coded character set for information interchange ISO/IEC 8859-1, Information technology 8-bit single-byte coded graphic character sets Part 1: Latin alphabet No. 1 ISO/IEC 15415, Information technology Automatic identification and data capture techniques Bar code p
45、rint quality test specification Two-dimensional symbols ISO/IEC 15424, Information technology Automatic identification and data capture techniques Data Carrier Identifiers (including Symbology Identifiers) ISO/IEC 19762-1, Information technology Automatic identification and data capture (AIDC) techn
46、iques Harmonized vocabulary Part 1: General terms relating to AIDC ISO/IEC 19762-2, Information technology Automatic identification and data capture (AIDC) techniques Part 2: Optically readable media (ORM) ISO/IEC 24723, Information technology Automatic identification and data capture techniques EAN
47、.UCC Composite bar code symbology specification AIM Inc. International Technical Standard: ITS/04-001, Extended Channel Interpretations - Part 1: Identification Schemes and Protocols 11Published by AIM Global, 125 Warrendale-Bayne Road, Suite 100, Warrendale, PA 15086, USA. SANS 15438:2008This s tan
48、dard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 15438:2006(E) 2 ISO/IEC 2006 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 19762-1, ISO/IEC 19762-2 and the following app
49、ly. 3.1 basic channel model standard system for encoding and transmitting bar code data where data message bytes are output from the decoder but no control information about the message is transmitted NOTE A decoder complying with this model operates in Basic Channel Mode. 3.2 bar-space sequence sequence which represents the module widths of the elements of a symbol character 3.3 cluster any of three mutually exclusive subsets of PDF417 symbol characters; the symbol characters in a given cluster
