本国际标准定义了多媒体内容描述接口，规定了一系列接口 从系统到应用程序级别，允许不同的系统交换有关多媒体内容的信息。信息技术 描述系统的体系结构、用于扩展和特定应用程序的语言，以及中的描述工具 音频和视频域，以及非特定于音频和视频域的工具。 ISO/IEC 15938的本部分规定了多媒体内容通信的系统级功能 描述。ISO/IEC 15938-1提供了一个规范，该规范将: ？能够开发ISO/IEC 15938接收子系统，称为ISO/IEC 15938终端，或 简而言之，用于接收和汇编可能已分区和压缩的多媒体内容描述 ？提供由第3部分规定的工具组成的多媒体内容描述的准备规则， ISO/IEC 15938的第4和第5部分，用于高效运输和储存。 ISO/IEC 15938终端内的解码过程是规范性的。上述规则为 多媒体内容描述的准备和编码，而不会产生唯一的编码结果 这种描述的表示。 MPEG-7标准的这一部分旨在与该标准的其他部分一起实施。在里面 具体而言，MPEG-7第1部分:系统假定了解第2部分: 中的描述定义语言（DDL） 它对描述符和描述模式的规范性语法定义，以及对模式的处理 和描述。本部分中的编码技术所指的获取描述的方法如下 定义见ISO/IEC 15938第3、4和5部分。 MPEG-7是一种可扩展的标准。将标准扩展到描述之外的标准方法 标准中提供的方案是在DDL中定义新的方案，并使这些DSs与 实例化的描述。更多细节见第2部分。

This International Standard defines a Multimedia Content Description Interface, specifying a series of interfaces from system to application level to allow disparate systems to interchange information about multimedia content. It describes the architecture for systems, a language for extensions and specific applications, description tools in the audio and visual domains, as well as tools that are not specific to audio-visual domains. This part of ISO/IEC 15938 specifies system level functionalities for the communication of multimedia content descriptions. ISO/IEC 15938-1 provides a specification which will: ？ enable development of ISO/IEC 15938 receiving sub-systems, called ISO/IEC 15938 Terminal, or Terminal in short, to receive and assemble possibly partitioned and compressed multimedia content descriptions ？ provide rules for the preparation of multimedia content descriptions consisting of the tools specified in Parts 3, 4 and 5 of ISO/IEC 15938 for efficient transport and storage. The decoding process within the ISO/IEC 15938 Terminal is normative. The rules mentioned provide guidance for the preparation and encoding of multimedia content descriptions without leading to a unique encoded representation of such descriptions. This part of the MPEG-7 Standard is intended to be implemented in conjunction with other parts of the standard. In particular, MPEG-7 Part 1: Systems assumes some knowledge of Part 2: Description Definition Language (DDL) in its normative syntactic definitions of Descriptors and Description Schemes, as well as in the processing of schema and descriptions. The methods for obtaining the descriptions to which the encoding techniques in this part refer are defined in Parts 3, 4, and 5 of ISO/IEC 15938. MPEG-7 is an extensible standard. The standard method of extending the standard beyond the Description Schemes provided in the standard is to define new ones in the DDL, and to make those DSs as accessible as the instantiated descriptions. Further details are available in Part 2.