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网络摄像机是架设在传统摄像机构架之上,利用视频压缩和网络传输技术将前端的模拟光电信号转换成数宇信号,除了具备传统摄像机的画面捕捉功能外,还可以通过网络进行异地管理和远程监控,成为近两年颇受市场欢迎的网络化产品。随着我国网络质量的不断改善和网络视频技术的逐步提升,网络摄像机也日渐放下了昔日尊贵的身架,已走出“炒概念”阶段,成为网络监控不可或缺的中坚力量。时至今日,监控行业普遍认为视频监控系统已经发展到第三代——网络视频监控。其系统主要由前端的IP Camera,或者模拟Camera与DVS;后端的网络传输设备:控制室的服务器、存储设备构成。它对比原来的第一代视频监控系统指定是以VCR(Video Cassette Recorders)为代表的传统CCTV系统,以及第二代以DVR为代表的数字监控系统具备了实时监控、集中存储、智能化管理等优点,另外还有性价比高、网上访问/升级便捷等诸多优点。对于网络监控的应用,人们最关心的是网络带宽对图像传输效果的影响和网上信息安全保密问题。这些问题成为制约网络视频监控发展的瓶颈。另外,在视频监控方面一直有DSP与ASIC之争,DSP适用于各种的视频格式开发,也造成了目前众多的视频监控产品格式不统一,出现了较多的企业自有视频标准:不同公司提供DSP的视频软压缩技术,差异性较大,用户难以辨别,这也是限制网络视频监控发展的瓶颈之一。让我们来看看海思GOAL~(TM) Hi3510是如何来解决前面提到的两个瓶颈难题的——在编解码质量上,Hi3510采用ARM9+DSP+硬件引擎方式,在384kbps带宽下就能够达到VCD的图像效果,在1Mbps带宽下能够达到接近DVD的效果。这比其他压缩格式如MPEG2/4,有不可比拟的优势。在网络、安全保密上,Hi3510集成了3端口交换,2个以太网接口;内置了AES、DES、3DES等数据加密引擎。在监控应用上面,该芯片还集成了单片的多码流处理,百万像素的Jpeg图片抓拍,数字水印,运动监测,帧率、分辨率可动态调节等技术。
Network camera is erected on the traditional camera architecture, the use of video compression and network transmission technology to front-end analog optical signals into digital signals, in addition to the traditional camera with the screen capture capabilities, but also through the network for remote management and remote monitoring , Nearly two years as the market popular network products. With the continuous improvement of network quality and the gradual improvement of network video technology in our country, network cameras are gradually putting down their former noble frame and have stepped out of the concept of “speculation” and become indispensable backbone for network monitoring. Today, the monitoring industry generally believes that video surveillance systems have evolved to the third generation - network video surveillance. The system mainly by the front of the IP Camera, or analog Camera and DVS; back-end network transmission equipment: control room server, storage devices. Compared with the original first-generation video surveillance system, it is specified as a traditional CCTV system represented by VCR (Video Cassette Recorders) and the second generation digital surveillance system represented by DVR has real-time monitoring, centralized storage and intelligent management Advantages, in addition to cost-effective, online access / upgrade and many other advantages. For network monitoring applications, people are most concerned about the impact of network bandwidth on the image transmission effect and online information security and confidentiality issues. These problems have become the bottleneck restricting the development of network video surveillance. In addition, the video surveillance has been the DSP and ASIC dispute, DSP is suitable for a variety of video format development, but also resulted in the current number of video surveillance product formats are not uniform, there are more companies own video standards: different companies Provide DSP soft video compression technology, the difference is larger, the user is difficult to distinguish, which is one of the bottlenecks to limit the development of network video surveillance. Let’s take a look at how the Hi3510 Hi3510 solves the two bottleneck problems mentioned above - the Hi3510 uses an ARM9 + DSP + hardware engine in terms of codec quality to achieve at 384kbps bandwidth VCD image effects, at 1Mbps bandwidth to achieve the effect of close to the DVD. This is an unparalleled advantage over other compression formats such as MPEG2 / 4. In the network, security, Hi3510 integrated 3-port switching, two Ethernet interfaces; built-in AES, DES, 3DES and other data encryption engine. In the monitoring application above, the chip also integrates a single multi-stream processing, megapixel Jpeg picture capture, digital watermarking, motion monitoring, frame rate, resolution can be dynamically adjusted and other technologies.