负责R&S音视频测试仪器、汽车电子测试仪器和系统的售前和售后技术支持；
Pre- and Post-sales technical support on R&S audio & video test instruments, automotive electronics test instruments and systems;
第二类是广播电视，广泛应用于音视频设备的测试。
通过对系统的整体测试，视频电话的效果良好，网络传输延时低、无明显抖动，实现了利用IP视频电话进行语音视频通话的功能。
The result of the test shows that the whole system works well; the transmission is low delay and no significant jitter and achieves the function that IP video Phone is used for voice and video calls.
最后，本建议说明了音频、视频和音视频质量的关系，因为它们是从不同实验室各自所做测试的结果导出的。
Finally it provides indications about relation between audio, video and audiovisual quality, as they were derived from results of tests carried out independently in different laboratories.
测试结果表明，本系统达到了MPEG - 4网络点播与组播的基本要求，能实时传输图像和声音，并在一定范围内达到音视频同步。
The test result shows that the system can transport MPEG-4 video and audio Unicast or Multicast and playback the video and audio sync.
测试结果表明，本系统达到了MPEG - 4网络点播与组播的基本要求，能实时传输图像和声音，并在一定范围内达到音视频同步。
The test result shows that the system can transport MPEG-4 video and audio Unicast or Multicast and playback the video and audio sync.
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