内置3G发射模块的车载DVR
基于3G技术的车载嵌入式，内置3G发射模块提升了整体稳定性和功能的多样性，不但可以在本地通过硬盘存储记录了车辆运营的全过程，还可以通过3G网络将视频实时的发送Internet网络中。3G网络传输的无线监控系统采用无线网络进行音视频的传输，3G网络在室内、室外和行车的环境中能够分别支持至少2M/秒、384K/秒以及144K/秒三种不同的传输速度。这样就为用户可以流畅、清晰的看到监控画面提供了技术保障，避免了有线网络带来的众多限制：目前的车载嵌入式生产厂商中，大多采用H.264压缩算法，其压缩比低，可以更好的再3G网络状态下进行视频传输。
在远程公交应急指挥中心中，指挥人员可以通过Internet对车辆进行监控、管理，可以有效预防处置突发事件、保障工作人员及乘客的安全，车辆管理单位构建成为了一个客户应急指挥系统。而行政管理部门也可达到对车辆更为高效的管理，提升政府及公交营运行业管理部门的管理能力和服务能力。
Vehicle
DVR with built-in 3G launch module
In vehicle embedded system based on 3G technology, the built-in 3G launch module improves the overall stability and diversity of functions. It can not only store the whole process of vehicle operation in the local hard disk, but also send video real-time to the Internet network through the 3G network. The wireless monitoring system transmitted by 3G network uses wireless network for audio and video transmission. The 3G network can support three different transmission speeds of at least 2M/ seconds, 384K/ seconds and 144K/ seconds in the environment of indoor, outdoor and driving. This provides a technical guarantee for the user to see the monitoring picture fluently and clearly, and avoids many restrictions caused by the cable network. Most of the current vehicle embedded manufacturers use H.264 compression algorithm, whose compression ratio is low, and can better carry on video transmission under the state of 3G network.
In the long-distance bus emergency command center, the commanders can monitor and manage the vehicles through the Internet. It can effectively prevent and dispose of the emergency and ensure the safety of the staff and passengers. The construction of the vehicle management unit has become a customer emergency command system. And the administrative departments can also achieve more efficient management of vehicles, and enhance the management and service capabilities of the government and public transport industry management departments.
通过3G手机的网络监控
手机视频监控一直是视频监控行业的用户非常希望达到的目标。理想中的手机视频监控可以无论使用者身在全球任何地方，任何时间，只要拿出手中的手机就可以看到想要看到的监控现场。
现在3G技术的开展使得之前的网络瓶颈逐渐得到解决。比如之前2G网络100k以下的带宽根本无法传输清晰、流畅的视频，基本只能用于抓拍图像，而现在的3G网络带宽者完全满足普通监控需求。另外，像中国电信的CDMAEVDO采用了按时长计费的模式，避免了视频监控大流量带宽导致的超高费用。
其实3G手机访问DVR浏览视频与普通ADSL访问DVR的原理是一样的，都是通过域名解析服务来访问DVR.唯一的区别手机的操作系统不同于我们常用的操作系统，相对应的软件、插件都需要重新设计。例如，天地伟业提供给客户手机服务器软件和jad或jar格式手机插件，将手机插件安装到客户的手机上，这样便可以使用手机，通过将手机服务器软件高效、快速的访问到前端DVR主机。
Network monitoring through 3G mobile phone
Mobile video surveillance has always been the goal that users of video surveillance industry hope to achieve. The ideal video surveillance of mobile phones can be seen anywhere in the world, at any time in the world, and at any time, as long as it takes out the mobile phone to see the monitoring site you want to see.
With the development of 3G technology, the bottleneck of network has been gradually solved. For example, the bandwidth below the 2G network before 100k can not transmit clear, smooth video, which can only be used to capture images, and now the 3G network bandwidth is fully satisfied with the common monitoring requirements. In addition, CDMAEVDO like China Telecom adopted a long time charging mode to avoid the high cost of video surveillance.
In fact, 3G mobile phone access to DVR browsing video and the common ADSL access to DVR is the same principle, it is through domain name parsing services to access the only difference between the operating system of the DVR. phone is different from our common operating system, and the corresponding software and plug-in need to be redesigned. For example, heaven and earth offer client phone server software and JAD or jar format cell phone plug-ins to install cell phone plug-ins on a customer's phone so that they can use a mobile phone to access the front DVR host by using the mobile server software efficiently and quickly.
