识别卡.记录技术.第7部分:磁条.高矫顽力、高密度

[中文适用范围]： ISO/IEC 7811 的这一部分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。 ISO/IEC 7811 的这一部分规定了身份证上高矫顽力磁条（包括任何保护性覆盖层）、编码技术和编码字符集的要求。 它考虑了人和机器方面并规定了最低要求。 矫顽力影响 ISO/IEC 7811 本部分中指定的许多量，但其本身并未指定。 高矫顽力磁条的主要特点是提高了耐擦除性。 这是通过最小化接触损坏其他磁条的可能性来实现的，同时保持与 ISO/IEC 7811-2 中定义的磁条的读取兼容性。 该标准规定的卡容量约为符合 ISO/IEC 7811-6 的卡容量的 10 倍。 磁道数量已增加至 6 个，每个磁道的宽度约为符合 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卡器也能够读取符合 ISO/IEC 7811-6 标准的卡。 IEC 7811-2 和 ISO/IEC 7811-6。 使用 MFM 编码技术将数据编码为 8 位字节。 数据分帧用于限制错误传播，纠错技术进一步提高读取的可靠性。 本系列标准的目的是提供卡的执行标准。 这些标准没有考虑卡在测试之前的使用量（如果有的话）。 不符合规定标准的，有关各方应进行协商。 ISO/IEC 10373-2 规定了用于根据 ISO/IEC 7811 本部分中规定的参数检查卡的测试程序。 注：ISO/IEC 7811 本部分中的 SI 和/或英制测量系统中的数值可能已被四舍五入后，因此彼此一致，但不完全相等。 可以使用任一系统，但两者不应混合或重新转换。 最初的设计是使用英制测量系统进行的。 [外文原描述]： ISO/IEC 7811-7(2004) is one of a series of International Standards describing the characteristics of identification cards. It is the purpose of ISO/IEC 7811-7 to provide criteria to which cards shall perform and to specify the requirements for such cards used for international interchange. It takes into consideration both human and machine aspects and states minimum requirements. ISO/IEC 7811-7 specifies requirements for a high coercivity magnetic stripe (including any protective overlay) on an identification card, the encoding technique and coded character sets. This encoding technique 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 eight-bit bytes using the MFM encoding technique. Data framing is used to limit error propagation, and error correction techniques further improve reliability of reading. ISO/IEC 7811-7 specifies: the conditions for conformance,physical characteristics for the card (warpage and surface distortions) and the magnetic stripe area (location, height and surface profile, roughness, adhesion, wear and resistance to chemicals),the signal amplitude performance characteristics of the magnetic stripe,the encoding specification including technique (MFM), angle of recording, bit density, flux transition spacing variation and signal amplitude,the data structure including track format, use of error correction techniques, user data capacity for ID-1, ID-2 and ID-3 size cards, and decoding techniques, andthe location of encoded tracks. ISO/IEC 7811-7, together with a standard for test methods, provides for interchange between various types of identification card processing devices and systems.