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数字音频广播(DAB)是一种多媒体广播系统,它除了可以传送声音广播节目外,还可以传送数据业务、静止图像甚至活动图像。本文介绍在DAB中使用的多媒体对象传输协议(欧洲标准—NE 301 234 V1.2.1 1999-02)。 概述 1、多媒体服务的条件 多媒体通常是指以多种多样的可听可视的格式或形式(文本、图像、声音等)来表现的信息。素材通常被组织或打包成一些文件。这些文件在展现前或者完全得到或者根据用户的要求交付。 多媒体服务需要控制这些展现(例如在屏幕上安排可视信息)。因此,最重要的部分就是服务器/终端的硬件和软件资源的直接利用。为了展现,合适的时间是
Digital Audio Broadcasting (DAB) is a multimedia broadcasting system that can transmit data services, still images, and even live images in addition to voice broadcast programs. This article describes the multimedia object transport protocol used in DAB (European Standard - NE 301 234 V1.2.1 1999-02). Overview 1, the conditions of multimedia services Multimedia usually refers to a variety of audible and visual format or form (text, images, sounds, etc.) to show the information. The material is usually organized or packaged into some files. These documents are delivered either before they are presented or at the request of the user. Multimedia services need to control these presentations (for example, arrange visual information on the screen). Therefore, the most important part is the direct use of server / terminal hardware and software resources. In order to show, the right time is