嵌入式网络音视频应用已经成为当今嵌入式应用的一个热门研究课题。
At present, the embedded network audio and video applications have become a hot research issue.
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.
首先，本文依次介绍音视频处理的基本知识，基于IP模块的FPGA设计方法和网络数据通信知识。
First of all, this paper in turn introduces the basic theories of audio and video processing, FPGA-based IP module design and network communications knowledge.
内容包括本地媒体文件解析、多媒体数据网络接收过程、音视频同步播放等流程。
The content includes analyzing the file format, process of receiving streaming media data, synchronization of video and audio playing and so on.
多播能节省网络带宽，广泛运用于在音视频传输中。
As it has advantage of saving network bandwidth which is in scare state, multicasting is widely applied on audio and video delivery.
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.
音视频压缩技术、实时数据传输及数据网络技术的成熟，使得在IP网络上实现多媒体通信成为可能。
The technical maturity of audio and video compression, real-time data transfer and network makes it possible to realize the multi-media correspondence on the IP network.
IPTV机顶盒具备网页浏览、流媒体播放、互动网络游戏、音视频电话等功能。
IPTV STB should have functions including Web page browsing, streaming media playing, interactive online game playing, making audio or video calls and so on.
远距离音视频网络交互式教学等多种新型网络教学方式应运而生。
New types of teaching using the long-distance audio and video signals, which are transmitted by network have emerged as The Times require.
分析了音视频联合建模的层级结构，利用动态贝叶斯网络对不同层级的音视频关联关系建立模型，并基于该模型进行音视频说话人识别的实验。
According to the hierarchical structure of audio-visual bimodal modeling, a new DBN is constructed to describe the natural audio and visual state asynchrony as well as their conditional .
华凌电子元件厂是专业生产各种电子接插件，音视频连接线，网络通讯电缆，电脑线，光纤电缆的厂家。
Hualing Electronic Components Factory is a leading enterprise specialized in producing variety of connectors, electrical connection wire, audio & video cable, computer cable, fiber optic cable.
由于视频服务器的CPU、内存、网络带宽的资源有限性，当用户数目增多时，音视频的质量急骤下降。
Because of the limitation of CPU, memory and bandwidth resource of the server, the quality of video and voice in conferencing gets worse quickly when the number of clients increases.
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.
NVD播放机除了播放光盘上的音视频资源外，还能够播放网络上的媒体资源，也能够通过USB接口播放移动存储设备上的音视频资源。
Besides playing the audio and video resource from CDROM, NVD also could play the audio and video resource from network or from mobile storage device across the USB interface.
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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