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.