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ISO/IEC 7811-7 2nd Edition, September 1, 2014 Identification cards - Recording technique - Part 7: Magnetic stripe - High coercivity, high density
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO/IEC 7811 is one of a series of International
Standards describing the characteristics for identification cards
as defined in the definitions clause and the use of 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 and encoding technique. It takes into
consideration both human and machine aspects and 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 to 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 six, each track being 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 used to limit error propagation and
error correction techniques further improve reliability of
reading.
It is the purpose of this series of International Standards to
provide criteria to which cards shall perform. No consideration is
given within these International Standards to the amount of use, if
any, experienced by the card 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 system
in this part of ISO/IEC 7811 might have been rounded off and
therefore are consistent with, but not exactly equal to, each
other. Either system can be used, but the two should not be
intermixed or reconverted. The original design was made using the
Imperial measurement system.