ISO/IEC TR 21000-12:2005 信息技术 多媒体框架(MPEG-21) 第12部分: MPEG-21资源传递用试验基础

标准编号:ISO/IEC TR 21000-12:2005

中文名称:信息技术 多媒体框架(MPEG-21) 第12部分: MPEG-21资源传递用试验基础

英文名称:Information technology — Multimedia framework (MPEG-21) — Part 12: Test Bed for MPEG-21 Resource Delivery

发布日期:2005-04

标准范围

ISO/IEC TR 21000-12:20 05规定了一种测试平台,该测试平台被设计用于辅助MPEG-21、用于流应用的可缩放视频编解码器(SVC)的性能评估,以及用于评估不可靠分组交换网络上的资源递送技术。测试床中使用的流协议基于RTSP和RTP。MPEG-21数字项适配(DIA)的网络适配QoS机制用于带宽可伸缩的流。MPEG-4 IPMP的子集也被包括在测试床中,以便可以针对不同的SVC设计测试DRM系统的加密流和分层访问功能。测试平台包括一个网络仿真器GUI,它与基于Linux的网络仿真器NistNet接口,用于实时仿真各种网络的信道特性。因此:可以评估各种可缩放编解码器(音频、视频、场景合成)技术。可以评估各种分组化方法和文件格式。各种多媒体流速率控制和差错控制机制可以插入测试台并进行评估。总之,测试床演示了以下MPEG技术:MPEG可扩展音频和视频编解码器;IP上的MPEG-4;MPEG-4 IPMP(一个小的子集);和MPEG-21 DIA网络自适应QoS。架构和API不绑定到任何特定的媒体编解码器。然而,目前该软件仅正式支持MPEG-4 FGS视频和MPEG-4 BSAC音频。当国际标准准备就绪时,将包括对ISO/IEC 21000-13(MPEG-21 part 13)SVC的支持。

ISO/IEC TR 21000-12:2005 specifies a test bed that is designed to assist in performance assessment of MPEG-21, Scalable Video Codec (SVC) for streaming applications, and for the evaluation of resource delivery technologies over unreliable packet-switched networks. The streaming protocols used in the test bed are based on RTSP and RTP. The Network Adaptation QoS mechanism of MPEG-21 Digital Item Adaptation (DIA) is used for bandwidth-scalable streaming. A subset of MPEG-4 IPMP is also included in the test bed so that encrypted streaming and layered access functionality of a DRM system can be tested for different SVC designs.

The test bed includes a network emulator GUI that interfaces with a Linux-based network emulator, NistNet, for real-time emulation of channel characteristics of various networks. Therefore:

  • Various scalable codec (audio, video, scene composition) technologies can be evaluated.
  • Various packetization methods and file formats can be evaluated.
  • Various multimedia streaming rate control and error control mechanisms can be plugged into the test bed and evaluated.


In summary, the following MPEG technologies are demonstrated by the test bed:
  • MPEG scalable audio and video codecs;
  • MPEG-4 on IP;
  • MPEG-4 IPMP (a small subset); and
  • MPEG-21 DIA Network Adaptation QoS.


The architecture and the API are not tied to any particular media codecs. However, currently only the MPEG-4 FGS video and MPEG-4 BSAC audio are officially supported by the software. The support for ISO/IEC 21000-13 (MPEG-21 part 13) SVC will be included when that International Standard is ready.

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