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1、 Reference number ISO/IEC 7811-7:2004(E) ISO/IEC 2004 INTERNATIONAL STANDARD ISO/IEC 7811-7 First edition 2004-07-15 Identification cards Recording technique Part 7: Magnetic stripe High coercivity, high density Cartes didentification Technique denregistrement Partie 7: Bandeau magntique Haute coerc
2、itivit, haute densit ISO/IEC 7811-7:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this 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 perfor
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5、cretariat at the address given below. ISO/IEC 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at
6、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 + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2004 All rights reserved ISO/IEC 7811-7:2004(E) ISO/I
7、EC 2004 All rights reserved iii Contents Page Forewordiv Introduction v 1 Scope 1 2 Conformance. 1 3 Normative references . 2 4 Terms and definitions. 2 5 Physical characteristics of the identification card 4 5.1 Magnetic stripe area warpage 5 5.2 Surface distortions . 5 6 Physical characteristics o
8、f the magnetic stripe. 6 6.1 Height and surface profile of the magnetic stripe area. 6 6.2 Surface roughness 8 6.3 Adhesion of stripe to card 8 6.4 Wear of magnetic stripe from read/write head.8 6.5 Resistance to chemicals 8 7 Performance characteristics for the magnetic material 8 7.1 General. 8 7.
9、2 Testing and operating environment 8 7.3 Signal amplitude requirements for magnetic media . 9 8 Encoding technique 11 9 Encoding specification. 12 9.1 Angle of recording 12 9.2 Nominal bit density. 12 9.3 Flux transition spacing variation. 12 9.4 Signal amplitude requirements 13 9.5 Bit configurati
10、on . 13 9.6 Direction of recording. 13 9.7 Leading and trailing clock bits 13 10 Data structure 13 10.1 Track format 14 10.2 Coding for error detection and correction 15 11 Decoding 18 12 Location of encoded tracks . 18 Annex A (informative) Read compatibility of magnetic stripes (ISO/IEC 7811-6 and
11、 ISO/IEC 7811-7). 20 Annex B (normative) Signal amplitude measurements 21 Annex C (informative) Magnetic stripe abrasivity . 22 Annex D (informative) Static magnetic characteristics. 23 Annex E (informative) Reed-Solomon code references 25 ISO/IEC 7811-7:2004(E) iv ISO/IEC 2004 All rights reserved F
12、oreword 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 technic
13、al 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
14、 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 committee is to prepare Intern
15、ational 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 the possibility that some o
16、f 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 7811-7 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 17, Cards and personal identif
17、ication. ISO/IEC 7811 consists of the following parts, under the general title Identification cards Recording technique: Part 1: Embossing Part 2: Magnetic stripe Low coercivity Part 6: Magnetic stripe High coercivity Part 7: Magnetic stripe High coercivity, high density -,-,- ISO/IEC 7811-7:2004(E)
18、 ISO/IEC 2004 All rights reserved v Introduction This edition is new and was prepared by JTC 1/SC 17/WG1 Physical characteristics and test methods for ID cards. Portions of this International Standard are identical to ISO/IEC 7811-2 and ISO/IEC 7811-6, however the user is encouraged to review the en
19、tire International Standard. The major differences between this International Standard and ISO/IEC 7811-2 and ISO/IEC 7811-6 are listed below. 1. The bit density has increased from 8,27 bits/mm (track 1,3) and 2,95 bits/mm (track 2) to 40 bits/mm for all tracks which results in 234 bytes of user dat
20、a per track for an ID-1 size card. 2. The encoding technique referred to as MFM is used in place of F2F. This change doubles the data storage density for the same minimum transition spacing with only a small reduction in the self-clocking ability. 3. The 3 tracks have been replaced by 6 tracks that
21、are approximately half the width so that they occupy the same space on the card. These are located so that readers designed to read the high density tracks will also be able to read cards conforming to ISO/IEC 7811-2 and ISO/IEC 7811-6. 4. Data is distributed in frames with synchronisation character
22、s to aid in error recovery, and there is a CRC for each frame and a track CRC. Data recorded on each track is independent from other tracks (error detection and correction for each track is on the same track), even though it may be only part of the message on the card. 5. Error detection and correct
23、ion is included using a shortened Reed-Solomon code. The amount of error correction is fixed for all card sizes. 6. The magnetic stripe area extends completely to the left and right edge of the card. 7. In Table 1, test density values have changed, the resolution requirement has changed from 0,7 to
24、0,8, the test for Waveform has been deleted, and Overwrite has been added to the requirements. 8. The maximum coercivity in Table D.1 of informative Annex D has been changed from 335 kA/m (4200 Oe) to 250 kA/m (3125 Oe). Notes in this International Standard are only used for giving additional inform
25、ation intended to assist in the understanding or use of the standard and do not contain provisions or requirements to which it is necessary to conform in order to be able to claim compliance with this standard. -,-,- INTERNATIONAL STANDARD ISO/IEC 7811-7:2004(E) ISO/IEC 2004 All rights reserved 1 Id
26、entification cards Recording technique Part 7: Magnetic stripe High coercivity, high density 1 Scope This part of ISO/IEC 7811 is one of a series of standards describing the characteristics for identification cards as defined in the definitions clause and the use of such cards for international inte
27、rchange. This part of ISO/IEC 7811 specifies requirements for a high coercivity magnetic stripe (including any protective overlay) on an identification card, the encoding technique and coded character sets. It takes into consideration both human and machine aspects and states minimum requirements. C
28、oercivity influences many of the quantities specified in this part of ISO/IEC 7811 but is not itself specified. The main characteristic of the high coercivity magnetic stripe is its improved resistance to erasure. This is achieved with minimal probability of damage to other magnetic stripes by conta
29、ct while retaining read compatibility with magnetic stripes as defined in ISO/IEC 7811-2. This standard provides for a card capacity of approximately 10 times that of a card conforming to ISO/IEC 7811-6. The number of tracks has been increased to 6, each track being approximately half the width of t
30、racks conforming to ISO/IEC 7811-6, located so that readers designed to read these high density tracks will also be able to read cards conforming to ISO/IEC 7811-2 and ISO/IEC 7811-6. Data is encoded in 8 bit bytes using the MFM encoding technique. Data framing is used to limit error propagation and
31、 error correction techniques further improve reliability of reading. It is the purpose of this series of standards to provide criteria to which cards shall perform. No consideration is given within these standards to the amount of use, if any, experienced by the card prior to test. Failure to confor
32、m to specified criteria should be negotiated between the involved parties. ISO/IEC 10373-2 specifies the test procedures used to check cards against the parameters specified in this part of ISO/IEC 7811. NOTE Numeric values in the SI and/or Imperial measurement system in this part of ISO/IEC 7811 ma
33、y have been rounded off and therefore are consistent with, but not exactly equal to, each other. Either system may be used, but the two should not be intermixed or reconverted. The original design was made using the Imperial measurement system. 2 Conformance A prerequisite for conformance with this
34、part of ISO/IEC 7811 is conformance with ISO/IEC 7810. An identification card is in conformance with this part of ISO/IEC 7811 if it meets all mandatory requirements specified herein. Default values apply if no others are specified. -,-,- ISO/IEC 7811-7:2004(E) 2 ISO/IEC 2004 All rights reserved 3 N
35、ormative 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 4287-1, Surface rough
36、ness Terminology Part 1: Surface and its parameters ISO/IEC 7810, Identification cards Physical characteristics ISO/IEC 10373-1, Identification cards Test methods Part 1: General characteristics tests ISO/IEC 10373-2, Identification cards Test methods Part 2: Cards with magnetic stripes 4 Terms and
37、definitions For the purposes of this part of ISO/IEC 7811, the terms and definitions given in ISO/IEC 7810 and the following apply. 4.1 primary standard set of reference cards established and maintained by Physikalisch-Technische Bundesanstalt (PTB) that represent the values of UR and IR designated
38、RM7811-7 4.2 secondary standard reference card designated RM7811-7 that is related to the primary standard as stated in the calibration certificate supplied with each card NOTE Secondary standards can be ordered from Physikalisch-Technische Bundesanstalt (PTB), AG. 2.52 - Bundesallee 100, D-38116 Br
39、aunschweig, Germany. The source of secondary standards will be maintained at least until 2005. 4.3 unused un-encoded card card possessing all the components required for its intended purpose, which has not been subjected to any personalization or testing operation, and which has been stored in a cle
40、an environment with no more than 48 hour exposure to day-light at temperatures between 5 C to 30 C and humidity between 10 % to 90 % without experiencing thermal shock 4.4 unused encoded card card according to 4.3 that has only been encoded with all the data required for its intended purpose (e.g. m
41、agnetic encoding, embossing, electronic encoding) 4.5 returned card card according to 4.4 after it has been issued to the card holder and returned for the purpose of testing 4.6 flux transition location of the greatest rate of change with distance of the magnetization -,-,- ISO/IEC 7811-7:2004(E) IS
42、O/IEC 2004 All rights reserved 3 4.7 reference current IR minimum recorded current amplitude under the given test conditions that causes, on the reference card, a readback signal amplitude equal to 80 % of the reference signal amplitude UR, at a density of 20 flux transitions per millimetre (508 flu
43、x transitions per inch) as shown in Figure 6 4.8 reference flux level FR flux level in the test head that corresponds to the reference current I R 4.9 test recording currents two recording currents defined by: I min = Recording current corresponding to 2,2 FR I max = Recording current corresponding
44、to 2,5 FR 4.10 individual signal amplitude Ui base-to-peak amplitude of a single readback voltage signal 4.11 average signal amplitude UA sum of the absolute values of the amplitude of each signal peak (Ui) divided by the number of signal peaks (n) for a given track over the length of the magnetic s
45、tripe area 4.12 reference signal amplitude UR maximum value of the average signal amplitude of a reference card corrected to the primary standard 4.13 physical recording density number of flux transitions per unit length recorded on a track 4.14 bit density number of data bits stored per unit of len
46、gth (bits/mm or bpi) 4.15 bit cell distance for a data bit nominally the reciprocal of the bit density (see Figure 8) 4.16 average bit cell Ba product of bit cell length and sum of the actual distances for all flux transition intervals on a track divided by the sum of the nominal distances for all f
47、lux transition intervals on the track ISO/IEC 7811-7:2004(E) 4 ISO/IEC 2004 All rights reserved 4.17 local average bit cell Ba6 comparison reference for a given flux transition interval equal to the nominal L1 distance multiplied by the sum of the actual distances for the previous six flux transitio
48、n intervals divided by the sum of the nominal distances for the previous six flux transition intervals (L1 * ( actual)/( nominal) 4.18 demagnetization current Id D C current value that reduces the average signal amplitude to 80 % of the reference signal amplitude (UR) on a secondary reference card t
49、hat has been encoded at a density of 40 ft/mm (1016 ftpi) at a current of Imin 4.19 L1 short distance between adjacent flux transitions nominally equal to 1 times the bit cell 4.20 L2 medium distance between adjacent flux transitions nominally equal to 1,5 times the bit cell 4.21 L3 long distance between adjacent flu