IEC 61937-3:20 17描述了用于传送根据AC-3和增强型AC-3格式编码的非线性PCM比特流的方法。IEC 61937-3的第三版取消并取代了2007年发布的第二版。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)移除对采样频率为32kHz的增强型AC-3比特流的支持； b)更新规范性和信息性参考资料； c)澄清增强AC-3比特流的暂停数据突发使用。 该合并版本由第三版（2017年）及其修正案1（2020年）组成。因此，除本出版物外，无需下令修订。

IEC 61937-3:2017 describes the method used to convey non-linear PCM bitstreams encoded according to the AC-3 and enhanced AC-3 formats. This third edition of IEC 61937-3 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) removal of support for enhanced AC-3 bitstreams with a sampling frequency of 32 kHz;
b) updates to normative and informative references;
c) clarification of pause data-burst usage for enhanced AC-3 bitstreams.
This consolidated version consists of the third edition (2017) and its amendment 1 (2020). Therefore, no need to order amendment in addition to this publication.