ANSI INCITS ISO IEC 7811-7-2004 Identification cards Recording technique Part 7 Magnetic stripe High coercivity high density.pdf

1、INCITS/ISO/IEC 7811-7-2004 (ISO/IEC 7811-7:2004, IDT) Identification cards Recordingtechnique Part 7: Magnetic stripe High coercivity, high densityINCITS/ISO/IEC 7811-7-2004(ISO/IEC 7811-7:2004, IDT)INCITS/ISO/IEC 7811-7-2004 ii ITIC 2005 All rights reserved PDF disclaimer This PDF file may contain

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4、ers were optimized for printing. Every care has been taken to ensure 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. Adopted by INCITS (InterNational Committee for

5、Information Technology Standards) as an American National Standard. Date of ANSI Approval: 11/16/2005Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2005 by Information Technology Industry Council (ITI). All rights reserved. These materials

6、 are subject to copyright claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any

7、 form, including an electronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America INCITS/ISO/IEC 7811-7-2004 ITIC 2005 All rights reserve

8、d iii Contents Page Foreword .v Introduction .vi 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 warpage5 5.2 Surface distortions.5 6 Physical characteristics of the magnetic stripe .6 6.1

9、 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 7.2 Testing and operating e

10、nvironment 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 configuration 13 9.6 Direction of r

11、ecording 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 16 11 Decoding 18 12 Location of encoded tracks . 19 Annex A (informative) Read compatibility of magnetic stripes (ISO/IEC 7811-6 and ISO/IEC 7811-7) . 21 A

12、nnex B (normative) Signal amplitude measurements . 22 Annex C (informative) Magnetic stripe abrasivity 23 Annex D (informative) Static magnetic characteristics . 24 Annex E (informative) Reed-Solomon code references 27 INCITS/ISO/IEC 7811-7-2004 iv ITIC 2005 All rights reserved INCITS/ISO/IEC 7811-7

13、-2004 ITIC 2005 All rights reserved v 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

14、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 li

15、aison with ISO 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 te

16、chnical committee 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 i

17、s 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. ISO/IEC 7811-7 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommi

18、ttee SC 17, Cards and personal identification. 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, hig

19、h density INCITS/ISO/IEC 7811-7-2004 vi ITIC 2005 All rights reserved 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 u

20、ser is encouraged to review the entire 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 whic

21、h results in 234 bytes of user data 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 ha

22、ve been replaced by 6 tracks that 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 fra

23、mes with synchronisation characters 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 ca

24、rd. 5. Error detection and correction 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 re

25、quirement has changed from 0,7 to 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

26、 used for giving additional information 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. AMERICAN NATIONAL STANDARD INCITS/ISO/IEC 7811-7-2004 I

27、TIC 2005 All rights reserved 1 Identification 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

28、such cards for international interchange. 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 a

29、nd states minimum requirements. Coercivity 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 t

30、o other magnetic stripes by contact 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

31、approximately half the width of tracks 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 us

32、ed to limit error propagation and 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

33、 prior to test. Failure to conform 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 syste

34、m in this part of ISO/IEC 7811 may 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 prereq

35、uisite for conformance with this 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. INCITS/ISO/IEC 7811-7-2004 2 ITIC

36、2005 All rights reserved 3 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. I

37、SO/IEC 4287-1, Surface roughness 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 m

38、agnetic stripes 4 Terms and 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 val

39、ues of UR and IR designated 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 -

40、 Bundesallee 100, D-38116 Braunschweig, 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 wh

41、ich has been stored in a clean 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

42、its intended purpose (e.g. magnetic 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 INC

43、ITS/ISO/IEC 7811-7-2004 ITIC 2005 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

44、per millimetre (508 flux 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

45、 current corresponding 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 l

46、ength of the magnetic stripe 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

47、 stored per unit of length (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 nomi

48、nal distances for all flux transition intervals on the track INCITS/ISO/IEC 7811-7-2004 4 ITIC 2005 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 pre

49、vious six flux transition 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 that 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 mediu