伴随着多媒体采集和处理设备成本的不断降低，以及处理目标的不断复杂化，多媒体信息系统正朝着大规模数据分析和管理系统靠拢，因此如何有效支持实时分布式多媒体信息所需的实时采集、压缩、传输、处理、描述、反馈与存档，以及后期的浏览与检索，已经成为多媒体计算研究的重要问题。为了有效支持实时分布式多媒体信息的实时采集、传输、处理、描述、存档等的需要，在分析动态上下文环境下实时分布式多媒体系统对底层采集、压缩和传输以及信息的表达和存储的普遍需求的基础上，提出并实现了一个通用的实时分布式媒体信息处理框架，以便为实时分布多媒体系统提供基础服务支持。该框架包括软件平台和信息系统两部分。前者用于将逻辑功能与物理设备隔离开来，完成实时采集、压缩、传输和解压等功能；后者通过统一信息表达格式，将数据与特定的采集处理模块隔离开来，同时还提供了信息管理的功能，以便于用户后期检索。这两部分共同将多媒体系统所需要的实时采集、处理、压缩、描述、反馈与存档以及离线浏览与检索等服务融入一致、统一的框架中。基于该框架的会议系统的相关实验表明，该框架具有良好的开放性、可配置性和可扩展性。

With the decreasing price of multimedia capturing and processing devices, as well as the capability to capture more complex, and sophisticated objectives, multimedia systems are facine the challenge of large data analysis and management. How to handle real time capturing, compressing, transferring, decompressing as well as information representation and management in a multimedia system has become an important research topic. We propose a real time distributed multimedia system framework for dynamic context environment based on a survey of the requirements of multimedia systems under dynamic context environment. It can be divided into two parts, the software infrastructure and the information system, fusing all needed functions in a real time distributed multimedia system into a unique framework. The former is used to encapsulate the function of capturing, compressing, and decompressing and so on, isolating logical functions from physical devices. The latter is used for information representation, isolating information from special capturing or processing devices, and it also provides the capacity of information management, which means users can search for specified information later. The experiments of the meeting system based on this frame show the openness, configurability and extensibility of our framework.