National foreword

This British Standard is the UK implementation of ISO/IEC 20830:2021.

The UK participation in its preparation was entrusted to Technical Committee IST/34, Automatic identification and data capture techniques.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2021.

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 International 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 ISO and IEC, also take part in the work.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).

Attention is drawn to the 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) or the IEC list of patent declarations received (see patents.iec.ch).

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.

This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Automatic identification and data capture techniques.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-committees.

Introduction

Han Xin Code is a two-dimensional matrix symbology which is made up of an array of nominally square modules arranged in an overall square pattern, including a Finder Pattern located at four corners of the symbol that are intended to assist in easy locating of its position, size and inclination. Alignment Patterns and Assistant Alignment Patterns are also used in Versions 4 to 84 symbols. A wide range of size of symbols is provided together with four error correction levels. Module dimension is user-specified to produce symbols by a wide variety of techniques.

Manufacturers of bar code equipment and users of the technology require publicly available standard symbology specifications to which they can refer when developing equipment and application standards. This document is published to meet this request.

1 Scope

This document defines the requirements for the symbology known as Han Xin Code. It specifies the Han Xin Code symbology characteristics, data encoding process, symbol structure, dimensions and print quality requirements, error correction rules, reference decoding algorithm, and user-selectable application parameters.

2 Normative references

3 Terms, definitions, and symbols

3.1 Terms and definitions

3.2 Mathematical and logical symbols

4 Symbology description

4.1 Symbology characteristics

4.2 Symbol structure

5 Requirements

5.1 Encode procedure overview

5.2 Data analysis

5.3 Mode

5.4 Data encoding

5.5 Error detection and correction

5.6 User considerations for encoding data in a Han Xin Code symbol

5.7 Construction of final data bit stream

5.8 Symbol construction

6 Symbol dimensions

6.1 Dimensions

6.2 Quiet zone

7 User guidelines

7.1 Human readable interpretation

7.2 Autodiscrimination capability

7.3 Principle of Han Xin Code symbol printing and scanning

8 Symbol quality

8.1 General

8.2 Symbol quality parameters

8.3 Process control measurements

9 Decoding procedure overview

10 Reference decode algorithm for Han Xin Code

10.1 General

10.2 Image preprocessing

10.3 Locate Finder Pattern and determine the orientation

10.4 Structural Information decoding

10.5 Establish the sampling grid

10.6 Sampling

10.7 Masking releasing

10.8 Restore data codewords

10.9 Error correction decoding

10.10 Data codeword decoding

11 Transmitted data

11.1 General

11.2 Basic interpretation

11.3 Protocol for Extended Channel Interpretation

11.4 Protocol for GS1 data transmission

Bibliography

BS ISO/IEC 20830:2021

Information technology. Automatic identification and data capture techniques. Han Xin Code bar code symbology specification

Current

Published:

30 Sep 2021