Home Database Mysql Tutorial 网络摄像机VS传统模拟摄像机

网络摄像机VS传统模拟摄像机

Jun 07, 2016 pm 03:29 PM
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模拟摄像机和网络摄像机似乎是监控中的一对冤家,往往是有你没我、有我没你。正因为如此,许多用户在安装监控系统时,不知道是选择模拟摄像机还是选择网络摄像机。 在监控市场,网络监控一直是一个具有争议性的话题,从发展的需求来讲,网络监控的优势是模拟

模拟摄像机和网络摄像机似乎是监控中的一对冤家,往往是有你没我、有我没你。正因为如此,许多用户在安装监控系统时,不知道是选择模拟摄像机还是选择网络摄像机。

在监控市场,网络监控一直是一个具有争议性的话题,从发展的需求来讲,网络监控的优势是模拟监控无法比拟的。但是模拟监控迟迟不肯下市也引起了大家更多的反思,而对于用户来说,模拟摄像机价格便宜,网络摄像机价格较贵,两相权衡,很多用户冲着价格优势做了决定,而这往往也是模拟摄像机的突围空间所在。

模拟摄像机和网络摄像机的区别在哪儿呢?相信大家从字面上可以得出一个大概的定义,也就是网络摄像机可以联网,模拟摄像机不能,而具体区别又是如何?

首先,概念要弄清:

模拟摄像机前端采用隔行扫描CMOS/CCD感光器将光信号转换成模拟电信号,然后输出到DSP,由DSP进行A/D转换与色彩调整等处理再做D/A转换调制成PAL/NTSC制式电视信号输出。

网络摄像机则是结合模拟摄像机与网络技术产生的新一代摄像机,其内置一个嵌入式芯片,采用嵌入式实时操纵系统。摄像机传送来的视频信号数字化后由高效压缩芯片压缩,通过网络总线传送到Web服务器,授权用户能够通过尺度的基于IP的网络基础构架在本地或者远程地点实现观看、存储和管理视频数据。

其次,性能大不同:

第一、清晰度。看得更清是每个用户追求的目标,也是安防行业的终极使命。网络摄像机与模拟摄像机目前的清楚度却不能相提并论。目前来说,网络摄像机已经可以达到百万、200万、500万甚至一千万像素图像输出,而模拟摄像机只能有CIF、D1的图像输出。

第二、整合性。网络摄像机内置操纵系统,使用任一台PC上的尺度WEB浏览器,就能够管理和查看图像,并且可以和多画面的管理软件共用,实现多路的监控,路数不受限制,不增加硬件的本钱;而模拟摄像机则要与DVR相连,DVR的路数有一定的限制,DVR接满后,在增加摄像头还要增加硬件的本钱。

第三、管理差异。网络摄像机内置WEB,使用一台PC上的尺度WEB浏览器,就能够管理和查看图像。同时,网络摄像机还能够实现远程管理和图像查看,并将图像资料存在远程的硬盘上,易于搜寻,易于存储,不会被破坏;而模拟摄像机相对来说是个封锁的系统,只能在内部监看,不可以远程监看,录像资料只能本地存储,也不能远程查看,很容易被不法分子破坏。

第四、摄像机的安装。网络摄像机只需将其连接到最近的网络,并分配一个IP地址就可以。它可以利用现有的网络作为传输平台,不用去布线;而模拟摄像机需要将同轴电缆连接到每一台摄像机,并连接到控制平台、录像设备、显示设备上,每增加一路都要重新布线,并且没有现成的网络可以利用。

第五、资金耗费。网络摄像机用于高质量的网络电缆的花费通常比同尺度的同轴电缆要少30%到40%,一根网线能够同时支持上百台网络摄像机和其他设备;而每个模拟摄像机都需要一根电缆相连,假如有多台摄像机,就必需购买许多电缆,并专门为这些电缆的安装和部署花钱,总体来说人力和维护成本较高。

第六、远程监控的实现。网络摄像机可以进行远程管理,如录像设置、云台控制、报警设置、双向对讲、进级治理等功能;模拟摄像机只能在本地观看图像进行管理。

通过上面几个方面的比较可以看出,网络摄像机在很多方面都优于模拟摄像机,但这也并不是绝对的,网络摄像机对外部环境的要求较高,需要一个非常严格的网络环境,而中国很多地方的网络应用环境还存在着一些延时、断线、拥堵的问题,在这种情况下,模拟摄像机的优势便凸显出来,因此对于用户来说除了考虑自身需求外,也要合理评估自己所处的环境,避免造成不必要的损失。

随着经济和科技的发展,高清网络摄像机的价格也愈发趋向平民化的趋势。正在逐步取代传统模拟摄像机的高清网络摄像机由其独天得厚的优势,必将成为引领高清安防监控摄像机的平民王者。

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