ISO/IEC 7811-7:20 18本文件是描述定义条款中定义的身份证特征以及此类卡在国际交换中的使用的一系列标准之一。 本文件规定了识别卡和编码技术上的高矫顽力磁条（包括任何保护性覆盖层）的要求。它考虑了人和机器两个方面，并规定了最低要求。 矫顽力影响本文中指定的许多量，但其本身没有指定。高矫顽力磁条的主要特征是其改进的抗擦除性。这是在保持与ISO/IEC 7811中定义的磁条的读取兼容性的同时以最小的接触损坏其他磁条的概率实现的。2. 本文件规定的卡容量约为符合ISO/IEC 7811-6的卡容量的10倍。磁道的数量已经增加到6个，每个磁道大约是符合ISO/IEC 7811-6的磁道宽度的一半，其位置使得设计用于读取这些高密度磁道的读取器也能够读取符合ISO/IEC 7811-2和ISO/IEC 7811-6的卡。使用MFM编码技术以8位字节对数据进行编码。数据成帧用于限制错误传播，纠错技术进一步提高了读取的可靠性。 ISO/IEC 7811系列标准的目的是提供卡的性能标准。这些标准中没有考虑卡在测试之前经历的使用量（如果有的话）。不符合规定标准的情况由相关各方协商。 ISO/IEC 10373-2规定了用于根据本文档中规定的参数检查卡的测试程序。 注:本文档中SI和/或英制测量系统中的数值可能已四舍五入，并且彼此一致，但不完全相等。使用任何一种系统都是正确的，但是混合或重新转换值可能会导致错误。最初的设计是使用英制测量系统进行的。

ISO/IEC 7811-7:2018 This document 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 interchange.
This document 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 document 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 document 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 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 the ISO/IEC 7811 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 conform to specified criteria is negotiated between the involved parties.
ISO/IEC 10373-2 specifies the test procedures used to check cards against the parameters specified in this document.
NOTE Numeric values in the SI and/or Imperial measurement system in this document may have been rounded off and are consistent with, but not exactly equal to each other. Using either system is correct but intermixing or reconverting values can result in errors. The original design was made using the Imperial measurement system.