继而从芯片选型到电路设计详细论述了系统CPU模块、音视频、总线网络等主要功能部分的硬件设计。
Following the hardware design the main function of the system including CPU module, audio and video, the bus network, was discussed in detail from the chip selection to the circuit design.
本文以安防监控系统为例，提出一个建立在以太网上的安防系统，用综合布线网络传输安防系统中的音视频信息。
By monitoring system as example, Ann based on Ethernet defend the system, Ann defends the audio frequency and video information in the system to transmit the comprehensive wiring network.
经分析，要构建一个网络数字电视系统，其关键技术主要集中在音视频信号数字化编码、音视频信号在IP网络有质量的传输、数字版权管理系统等方面。
The key technology of a IPTV system includes audio and video encode, QoS of audio and video transfers over IP network and digital right management system.
该网络教学系统也适用于电视会议、现场直播等音视频系统。
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.
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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