本文件描述了MPEG-2传输系统中的MPEG-4 AAC、HE AAC、HE AAC v2和扩展HE-AAC（在本文件中统称为“AAC系列”）配置文件音频的传输。本文还讨论了与MPEG-4 AAC配置文件音频密切相关的MPEG-2 AAC LC配置文件音频。 本文档中定义了向AAC系列音频发送信号所需的描述符，以及在接收机中向主服务和相关服务的混合发送信号所需的信息。SCTE 54[10]中定义了使用MPEG-2系统的电缆复用和传输。AAC系列音频基本流的编码约束在SCTE 193-1[1]中定义。

This document describes the carriage of MPEG-4 AAC, HE AAC, HE AAC v2, and Extended HE-AAC (referred to collectively in this document as the "AAC family") profile audio in MPEG-2 transport systems. It also discusses MPEG-2 AAC LC profile audio, which is closely related to MPEG-4 AAC profile audio. The descriptor necessary to signal AAC family audio and information for signaling mixing of main and associated services in the receiver are defined in this document. Multiplexing and transport for cable using MPEG-2 systems are defined in SCTE 54 [10]. Coding constraints for AAC family audio elementary streams are defined in SCTE 193-1 [1].