IEC 61937-1:20 21作为IEC 61937-1:20 21 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 61937-1:20 21适用于使用IEC 60958系列传输非线性PCM编码音频比特流的数字音频接口。 它描述了这种数字接口在消费者应用中的使用方式。专业模式不在本文档范围内考虑。 IEC 61937-1:20 21取消并取代了2007年发布的第二版和2011年发布的修正案1。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)Pe场的激活； b)信道状态比特的增强使用。 c)增加附件B。

IEC 61937-1:2021 is available as IEC 61937-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61937-1:2021 applies to the digital audio interface using the IEC 60958 series for the conveying of non-linear PCM encoded audio bitstreams.
It describes the way in which this digital interface can be used in consumer applications. The professional mode is not considered within the scope of this document.
IEC 61937-1:2021 cancels and replaces the second edition published in 2007, and amendment 1 published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Activation of Pe field;
b) Enhanced usage of channel status bits.
c) Addition of Annex B.