请帮忙翻译！
本文从网通宽带城域网现状着手，对利用网通宽带城域网承载IPTV业务进行了探讨。首先，开展IPTV业务的关键技术就是如何在城域网中部署IP组播，文中对IP组播原理、DSLAM中IP组播的实现方式和目前还存在的问题进行了分析。其次，本文分析了国内流行的几种视频编解码标准和用户接入认证方式，通过比较分析选出了适合网通IPTV运营的编解码标准和用户接入方式。最后，分析了网通宽带城域网，提出了IPTV承载网的改造和建设方案。
This article is started from the current situation of urban area network of China Netcom, and talk about carrying IPTV services by utilizing the network。
Firtly, the key technology in IPTV services is how to deploy IP group broadcast in urban area network。 In the article, it analyses the principle of group broadcast,realization methords of group broadcast in DSLAM and the remaining problems till now。
Secondly, the article analyses several video coding/decoding standards which are popular in the county and the authentication methords for subscriber access, and selects which is the best to fit the operation for China Netcom。
Finally, analysing the urban area network of China Netcom, and presenting reformation and construction scenario of IPTV carrier network。
有没有搞错,翻成什么?题目根本就不明确呀!没办法说!
This article passes the wide band metropolitan area network present situation from the net to begin, to used the net to pass the wide band metropolitan area network load bearing IPTV service to carry on the discussion。
First, how develops the IPTV service the key technologies is in the metropolitan area network deployed the IP multicast, in the article the question which to in the IP multicast principle, DSLAM the IP multicast realization way and at present also existed has carried on the analysis。
Next, this article analyzed the domestic popular several kind of video frequencies to arrange the decoding standard and the user turning on authentication way, selected through the comparative analysis has suited the net to pass the IPTV operation to arrange the decoding standard and the user turning on way。
Finally, analyzed the net to pass the wide band metropolitan area network, proposed the IPTV load bearing network transformation and the construction plan。
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答：不知道你的问题是否已经解决,楼上的方法我试过,但都不行,可能与我安装的系统有关.后来找到天堂2的五笔输入法补丁,安装后就OK了.现在把下载地址附上,希望能帮到你...详情>>
答：Whatever busy he is ,he will read the News of Sports every evening.详情>>
