1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58identification and data capture techniques MicroPDF417 bar code symbology specificationICS 35.040In
2、formation technology Automatic BRITISH STANDARDBS ISO/IEC 24728:2006BS ISO/IEC 24728:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48693 1Cross-referencesThe British Standards which implement internationa
3、l publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all t
4、he necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO/IEC title page, pages ii to vii
5、, a blank page, pages 1 to 115 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this committee can be obtained on request to its secretary.
6、present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard reproduces verbatim I
7、SO/IEC 24728:2006 and implements it as the UK national standard.The UK participation in its preparation was entrusted to Technical Committee IST/34, Automatic identification and data capture techniques, which has the responsibility to: aid enquirers to understand the text;Reference numberISO/IEC 247
8、28:2006(E)INTERNATIONAL STANDARD ISO/IEC24728First edition2006-06-01Information technology Automatic identification and data capture techniques MicroPDF417 bar code symbology specification BS ISO/IEC 24728:2006ii iiiContents Page Foreword vi Introduction vii 1 Scope 1 2 Normative references 1 3 Term
9、s and definitions .2 4 Symbols, operations and abbreviated terms4 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 symb
10、ol parameters7 5.2.2 Row and column combinations9 5.2.3 Row parameters.10 5.2.4 Codeword sequence10 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 codewords15 5
11、.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 number30 5.5.2 Pre-ass
12、igned and default Extended Channel Interpretations .31 5.5.3 Encoding ECI sequences within compaction modes 31 5.5.4 Post-decode protocol33 5.6 Determining the codeword sequence33 5.7 Error detection and correction.34 5.7.1 Number of error correction codewords.34 5.7.2 Error correction capacity 34 5
13、.7.3 Defining the error correction codewords35 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 Generati
14、ng the error correction codewords .37 5.11 Low level encodation 39 5.11.1 Clusters.40 BS ISO/IEC 24728:2006iv 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 4
15、7 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 o
16、f 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
17、 data for Structured Append51 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 defa
18、ult 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 correc
19、tion 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 Structu
20、red 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) Reference decode algorithm for Micro
21、PDF417 88 J.1 Phase 1: Initialization 88 J.2 Phase 2: Filling the matrix 89 J.3 Phase 3: Interpretation . 90 J.4 Reference line-decode algorithm 91 Annex K (normative) Error correction procedures . 95 Annex L (normative) Symbology identifier 97 Annex M (normative) Transmission protocol for decoders
22、conforming with original PDF417 standards. 98 M.1 Basic Channel Mode . 98 M.2 GLI encoded symbols. 98 M.3 Structured Append symbols 100 M.4 Transmission of reserved codewords using the original PDF417 protocol . 101 BS ISO/IEC 24728:2006vM.5 Achieving compatibility between old and new PDF417 equipme
23、nt .101 Annex N (informative) Algorithm to minimise the number of codewords.104 Annex O (informative) Guidelines to determine the symbol matrix.106 Annex P (informative) Calculating the coefficients for generating the error correction codewords worked example 107 Annex Q (informative) Generating the
24、 error correction codewords worked example 109 Annex R (informative) Division circuit procedure for generating error correction codewords112 Annex S (informative) Additional guidelines for the use of MicroPDF417113 S.1 Autodiscrimination compatibility.113 S.2 Pixel-based printing 113 Bibliography 11
25、5 BS ISO/IEC 24728:2006vi Foreword ISO (the International Organization for Standardization) 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 Internationa
26、l Standards through technical committees established by the respective organization 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 I
27、SO and IEC, also take part in the work. In the field of information technology, ISO 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 comm
28、ittee is to prepare International Standards. Draft International Standards adopted 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 t
29、he possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 24728 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, A
30、utomatic Identification and data capture techniques. This International Standard contains many provisions which are identical with those of ISO/IEC 15438. BS ISO/IEC 24728:2006viiIntroduction MicroPDF417 is a multi-row symbology, derived from and closely based on PDF417. MicroPDF417 is designed for
31、applications with a need for improved area efficiency but without the requirement for PDF417s 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
32、reading by a wide variety of techniques. Since MicroPDF417s 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 sy
33、mbology specification (ISO/IEC 15438) wherever appropriate, or with the appropriate modifications. For ease of cross-reference, this International Standard follows a similar document structure, with minor differences in clause/subclause numbering, to ISO/IEC 15438. BS ISO/IEC 24728:2006blank1Informa
34、tion technology Automatic identification and data capture techniques MicroPDF417 bar code symbology specification 1 Scope This International Standard specifies the requirements for the bar code symbology known as MicroPDF417. It specifies the MicroPDF417 symbology characteristics, data character enc
35、odation, symbol formats, dimensions, error correction rules, decoding algorithm, and a number of application parameters. 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
36、 references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 646:1991, 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 alphab
37、et No. 1 ISO/IEC 15415, Information technology Automatic identification and data capture techniques Bar code print quality test specification Two-dimensional symbols ISO/IEC 15417, Information technology Automatic identification and data capture techniques Bar code symbology specification Code 128 I
38、SO/IEC 15418, Information technology EAN/UCC Application Identifiers and Fact Data Identifiers and Maintenance ISO/IEC 15424, Information technology Automatic identification and data capture techniques Data Carrier Identifiers (including Symbology Identifiers) ISO/IEC 24723, Information technology A
39、utomatic identification and data capture techniques EAN.UCC Composite bar code symbology specification ISO/IEC 19762-1, Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 1: General terms relating to AIDC ISO/IEC 19762-2, Information technol
40、ogy Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 2: Optically readable media (ORM) AIM Inc. International Technical Standard: ITS/04-001, Extended Channel Interpretations Part 1: Identification Schemes and Protocols 1GS1 General Specification 21Published by
41、AIM Global, 125 Warrendale-Bayne Road, Suite 100, Warrendale, PA 15086, USA. 2Published by GS1, Blue Tower, Avenue Louise 326, bte 10, B-1050 Brussels, Belgium. BS ISO/IEC 24728:20062 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 19762-1, ISO/I
42、EC 19762-2 and the following apply. 3.1 application identifier sequence of 2 to 4 digits, used to define the nature or use of the subsequent data characters, in accordance with ISO/IEC 15418 and the GS1 General Specification 3.2 bar-space sequence sequence which represents the module widths of the e
43、lements of a symbol character 3.3 basic channel mode 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 3.4 cluster any of three mutually exclusive subsets of PDF417 symbol chara
44、cters, also used in MicroPDF417; the symbol characters in a given cluster conform with particular structural rules which are used in decoding the symbology 3.5 compaction mode any of three data compaction algorithms in PDF417 (Text, Numeric and Byte Compaction modes), also used in MicroPDF417, which
45、 are used to map 8-bit data bytes efficiently to PDF417 codewords 3.6 e-distance measurement from the leading edge of one element to the leading edge of the next element, or from the trailing edge of an element to the trailing edge of the next element, in a symbol character or Row Address Pattern 3.
46、7 error correction codeword codeword which encodes a value derived from the error correction codeword algorithm to enable decode errors to be detected and, depending on the number of error correction codewords, to be corrected 3.8 Extended Channel Interpretation ECI procedure within some symbologies
47、, including MicroPDF417, to replace the default interpretation with another interpretation in a reliable manner NOTE The interpretation intended prior to producing the symbol can be retrieved after decoding the scanned symbol to recreate the data message in its original format. 3.9 extended channel
48、model system for encoding and transmitting both data message bytes and control information about the message, the control information being communicated using Extended Channel Interpretation (ECI) escape sequences 3.10 family set of MicroPDF417 symbol versions sharing the same number of columns and
49、the same RAP rotation BS ISO/IEC 24728:200633.11 function codeword codeword which initiates a particular operation within a symbology, for example to switch between data encoding sets, to invoke a compaction scheme, to program the reader, or to invoke Extended Channel Interpretations 3.12 Global Label Identifier GLI procedure in the PDF417 symbology which behaves in a similar manner to Extended Channel Interpretation NOTE The GLI system was the symbology-dependent precursor to the symbology-
