ISO/IEC 13818包括系统，视频，音频，性能测试等11个部分，该文档属于第部分，主要介绍了AAC中的关键技术-ISO/IEC 138 consists of 11 parts, such as Systems, Video, Audio, Conformance testing, Software simulation, and so on. This document is the 7th part of 13818, it describes the key technologies