IEC 61938:2018 RLV包含国际标准及其红线版本。红线版本只有英文版本。Redline版本为您提供了一种快速简单的方法来比较该标准与其前一版本之间的所有变化。红线版本不是IEC官方标准，只有标准的当前版本才被视为官方文件。 IEC 61938:2018为多媒体模拟接口特性的当前实践提供了指导，以实现不同制造商设备之间的互操作性。它不是一个性能标准。没有给出用于车辆中的设备的接口以及用于广播和类似设备的模拟视频接口的建议。有关数字信号的互连，请参阅IEC 60958。这第三版取消并取代了2013年出版的第二版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: a)电气公差标准化； b)调整输出源阻抗的推荐值； c)对于阻抗定义的扬声器系统，另外推荐6欧姆的值； d)每个表中的值是根据现有技术选择的，并且代表工业中的最佳实践。

IEC 61938:2018 RLV contains the International Standard and its Redline version. The Redline version is available in English only. The Redline version provides you with a quick and easy way to compare all the changes between this standard and its previous edition. The Redline version is not an official IEC Standard, only the current version of the standard is to be considered the official document.

IEC 61938:2018 gives guidance on current practice for the characteristics of multimedia analogue interfaces to achieve interoperability between equipment from different manufacturers. It is not a performance standard. Recommendations for interfaces for equipment used in vehicles, and for analogue video interfaces for broadcast and similar equipment, are not given. Refer to IEC 60958 for the interconnection of digital signals. This third edition cancels and replaces the second edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) electric tolerance is standardized;
b) recommended value of output source impedance is adjusted;
c) value of 6 Ohms is additionally recommended to impedance-defined loudspeaker systems;
d) values in each table are chosen with respect to the state of the art and representative of best practice in industry.