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The related technology of video conferencing is explored and analyzed by this article; the development and present situation of the video conferencing system at home and abroad are also described in this article; the system's communication technology as well as the enabling technology of audio and video synchronization are analyzed and discussed, as well as the architecture of research and development of video conferencing system is also put forward and summarized.

本文分析和探讨了视频会议的相关技术，介绍了视频会议系统在国内外的发展和现状，并对该系统中的通信技术进行了分析。在对系统中的音频和视频同步的实现技术上，做了分析和讨论，对视频会议系统的研发做了架构和总结。

On the base of studying application methods and relative information of the relative chips, the paper designed the system hardware ,including LCD interface designing、video gathering chip and its peripheral circuit designing、FPGA chip and other module interface designing; 3、The LCD controller module、video in controller module、configuration initialized module of the video image decode chip、FPGA and program of module interface were all compiled and debugged in the paper. 4、The whole system debugging was carried through, and the video image data storage and displaying on LCD screen was carried out in the paper. The paper first designed the system frame, then designed hardware platform according to the system frame and then analyzed it、debugged it, finally,compiled the module code and debugged the whole system to achieve system requirements.

本文具体研究工作主要体现在以下几个方面： 1分析了的嵌入式视频图像采集、处理与LCD显示系统的总体需求，设计了基于NIOSⅡ的嵌入式系统总体架构； 2在学习相关芯片的具体应用方法和相关知识的基础上，设计了系统的硬件，包括LCD接口设计、视频采集芯片及外围电路设计、FPGA芯片和其他模块接口主板设计； 3编写并调试了LCD控制器模块、视频输入控制器模块、视频解码芯片初始化配置模块、FPGA和各个模块接口程序； 4进行了整个系统的联调，完成了视频图像数据存储并通过LCD显示；本文首先建立了系统架构，然后根据系统架构进行硬件平台的设计并对硬件平台进行分析和调试，最后编写个模块代码并完成系统联合调试实现系统要求。

To pause your video in a one-on-one video chat, or in a video chat room click on your webcam icon in your local video window.

若要暂停视频您的视频在一对单视频聊天，或在聊天室视频窗口点击您的摄像头图标，在你的本地人员。

Compared with 2D video,the depth information of scene has been added to 3D video,and the reality of visuality has also been enhanced,which can provide the feeling of immension in all domains.3D video technology can be widely used in digital television,mobile device systems,3D video-conferencing systems,virtual reality systems,and so on.

随着多媒体技术的不断发展，视频技术也需要从二维向三维转变，和普通的二维视频相比，三维视频增加了场景的深度信息，增强了视觉的现实感和逼真感，可以给用户提供全方位沉浸式的感受。

What transition relies on is powerful technology is propped up, get together force medium developed high check the amount of movie and TV to sow platform, video to search a series of products such as accelerator of engine, video in succession, among them key word of video search engine hits the target rate prep above is congener website 50% above, the newer rate of content library is industry the fastest; Video accelerator quickens speed to be in industry is congener the be among the best of candidates in the product, applicably at much home country it is Youtube even website of such international mainstream portal.

转型依靠的是强大的技术支撑，聚力传媒相继开发了影视高清点播平台、视频搜索引擎、视频加速器等一系列产品，其中视频搜索引擎关键字命中率高于同类网站50%以上，内容库的更新速度为业界最快；视频加速器加速速度在业界同类产品中名列前茅，可适用于多家国内甚至是Youtube这样的国际主流门户网站。

When we designed the system, we considered some key factors such as the system must deal with and store a great deal video and audio data, the capability of the hard disk in the server and client, hi the part of video compression, we choose the currently MPEG-4 video constringent card to complete the collecting and compression of the video and audio signals .

在论文研究与实用系统设计中，充分关注到大量视音频数据的处理、存储以及服务器和远程客户端的硬盘容量等关键因素，视音频压缩采用了最新的MPEG-4视音频压缩卡进行视音频信息的采集和压缩。

BACE algorithm has the desired property that does not reduce the encoding efficiency of the CABAC entropy encoder compared to the CIME algorithm for CAVLC entropy encoder. Both CIME and BACE algorithms can adapt to the content security level by choose the amount and different key parts of the video stream to be encrypted, the theoretical and experimental results show that both these algorithms can effectively encrypt the video content. Due to the ability of encrypting the video content without violating the syntax, the BIME and BACE algorithms can be employed used for many advanced H.264/AVC coding options without first decrypting the video stream, like Data Partition and UnEqualized Protection for the enhancement of transmission robustness, and the scalable coding in order to match the different channel capacity.

上述两种结合了H.264/AVC熵编码器特征的内容选择性加密算法，由于其加密后的视频码流的句法结构完全符合H.264/AVC视频编码标准，与传统的基于块数据的块加密算法相比较，本文提出的两种内容加密算法可以使得加密后码流在无需解密的情况下，实现H.264/AVC视频编码标准为移动视频应用而设计的诸多特性，如：增强传输鲁棒性的数据分割技术和非均衡保护技术，以及直接做匹配信道带宽的分级编码操作等，具有更高的灵活性和计算效率，从而可以灵活运用于各种应用场合。

In video processing, good at research design as follows: the freezing of the video signal processing, video signal storage deal, LCD driver board design, TV signal processing, video signal and appears somewhat like a mirror, picture-in-picture deal with such .

在视频处理方面，擅长于如下方式的研发设计：视频信号的冻结处理，视频信号的存储处理，LCD驱动板的开发设计，TV信号的处理，视频信号的倒像和镜像，画中画处理等。

Video is video, see video of the process of butter surprise, happiness, when we know that the thieves will no longer cream video, the kind of mood is depressed.

视频就是视频，看奶油视频的过程是惊喜的，快乐的，当我们知道奶油不会再出盗贼视频时，那种心情是沮丧的。

L A A/V video input port has been designed for FO-24U2, which may easily capture the video images from camera, DVD/VCD players and others; when you have installed the software with the machine, the professional video capture software will be able to re-record the TV programs and the images in household video and audio apparatus into DVD/VCD, which allows you to share the material benefit and happiness brought by this product.

l 1个A/V视频输入端口设计用于FO-24U2，FO-24U2可容易地从照相机、DVD/VCD播放器及其他设备采集视频图像。只要你的机器安装了软件，专业的视频采集软件就可以重录下家用音频视频设备中的电视节目和图像，存至DVD/VCD中。你可以享受到本产品所带来的实实在在的利益和愉悦。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。