Teach you to do a smart network camera buyers

Teach you to do a smart network camera buyers
Network Camera is a high-tech new products, due to security across the network and the two little before the stakeholders in the industry , Gehangrugeshan , engage in surveillance networks do not understand , do not understand the monitoring network , which gives the already blurry webcams cast a veil of mystery . For now, the dealer camp, most of the sales staff know it is only at the level of the water Flower in the Mirror of hazy . Let alone a buyer . The vast majority of buyers or to one thinks , or to speak by the price . Result is that buyers can not buy the right products , soon put the product into the Recycle Bin. Money is spent , not accomplishing things .
This article will teach you to know about network cameras, make a smart buyer.
First, recognize network camera :
We need first to understand the network cameras. Network camera called IP CAMERA ( abbreviated IPC) by the network coding module and analog camera combination. Network coding module analog cameras capture analog video signal into a digital signal compression coding , which can directly access the network switching and routing equipment ( switches, routers, these two products for the network users are not familiar with it ) , and then access the Internet. IPC own IP address , some brands of IPC also comes with a domain name. LAN users can log in to view the IP address of the IPC and control surveillance video management and recording. Remote users can log in through the IPC IPC domain name to watch , control, management, and video. Both LAN users or remote users to log IPC available through a web browser (IE) and the corresponding video centralized management software.
Relative to analog cameras , IPC network camera can be easier to achieve control especially remote monitoring, construction and maintenance easier , better support for audio , better support alarm linkage , more flexible video storage , richer product selection , more high-definition video effects and more perfect monitoring and management. In addition , IPC supports WIFI wireless access , 3G access , POE power supply ( network-powered ) and fiber access . IPC for the emergence of network and security industry landmark historical significance.
Most of the IPC shape and analog cameras almost, because IPC is often used in homes and offices , taking into account aesthetics , IPC has richer and more beautiful shape . If VStarcam of T7892WIP, T7838WIP.
IPC 's great value . To install it at home , you can see the home anywhere in real time : to understand the child 's learning , caring for the elderly , to see pets ; install it in the shop , you can visit a shop without leaving home : Understanding the work of the staff , traffic analysis, display cases and other goods ; install it in the product exhibition room, you can feel free to let customers see samples of distant ; install it in the hospital , the patient can get distant doctors' consultation is no exaggeration to say that , IPC can be installed in any one place , IP Camera eventually into millions of households , into the various sectors of society in various fields so as to make a significant contribution to the harmonious development .
Second, the network camera several key parameters
1 ) Lens
Lens is a video capture first off , the lens will naturally affect the quality of the video effects, although there are many lenses , a great effect on the video , shot in price from tens of dollars to several thousand dollars. However, surveillance is still not a few million to buy the lens , lenses are available in the market and therefore are basically similar. However, the focal length of the lens effect of the video is worth noting , which means that you should consider when selecting products whether you choose a model with interchangeable lenses , or to consider whether to select the zoom lens. Here have to mention , zoom refers to the focal length of the lens can be changed . Some IPC functionality with digital zoom , digital zoom means that you can view the video image to enlarge , did not change the sharpness of the image , the application of the IPC little value . Beware some are not particularly professional sales staff or JS one concept .
2 ) Image Sensor
This is the impact of the key factors of video effects . There are currently two kinds of CMOS and CCD , CCD dynamic range and clarity is good, technology is very mature , both picture quality and anti- noise capability , but its weakness is the power consumption , high production costs ; while COMS development today , of the various indicators was close CCD, and low power consumption , low cost advantage, so now there are many manufacturers will choose as a photosensitive core components using CMOS .
3 ) video compression algorithm ( also known as video compression format ) .
This is the IP network camera the most important key factor , because it directly determines the video resolution , video fluency and video storage space. And through my years of understanding, this was always the most important factor is the seller intentionally or unintentionally avoided , because it may be in itself can not tell where Cn , or shoddy motives. But as a savvy buyer you must understand clearly. IPC currently on the market are mainly H.264, MPEG4 two video compression algorithms. Stronger H.264 compression , video loss is less, so clearer and more fluid. The former can support the 25 frames / second frame rate , which is generally not more than 10 frames / sec . This means that the latter's video is not coherent, not real ; since MPEG4 compression ratio is not big enough , if you do the whole real-time , stream is too large, it is difficult to see the remote .
4 ) image format
Image format of the video image is to determine the actual number of pixels , of the DVD format , and VGA (640 * 480) format, and CIF (352 * 288) form two kinds , DVD image format family contains D1 (720 * 576 interlaced scanning ), D2 ( 1048 * 720), D3 (1920 * 1080 interlaced ), D4 (1280 * 720 progressive scan ) and D5 (1920 * 1080 progressive scan ) five kinds of image formats , the current mainstream market for D1. supports D3 and D4 of megapixels is also listed, but due to its large bandwidth , is not widely applied .
Different pixels with different image format , video file sizes are not the same . If it is not the same image format, we can not alone recording hard disk size required to determine the merits of the IPC . An IPC image formats can often be adjusted, which means that if your hard disk space is not big enough, but require a longer recording time , it can be achieved by reducing the image format .
5 ) Frame Rate
As we all know , any video files are composed by a continuous picture , a picture we call it a , like a second of video images from the 25 contiguous composition , when the frame rate is 25 frames / sec. In the PAL standard , 25 frames / sec video performance can be very realistic action . If less than 25 , the video of the action will not consistent , the lower the more incoherent even be jumping movements artifacts . Therefore, the frame rate is very important in video surveillance . This parameter is the interface between the video monitor will show it. This parameter , also was a lot of not very professional salesperson avoided. We buy products must pay attention to this , because if can support 25 frames / sec IPC cost difference as well.
6 ) dual-stream
Some IPC is designed to support two video signal, i.e. a so-called dual-stream . Benefits of dual-stream stream is watching all the way , all the way to stream memory and storage are used than watch stream all the way to more effectively prevent network congestion , so that it can better protect the video in effective network bandwidth fluency.
7 ) front-end storage
Some of the IPC with an SD card slot or USB removable storage interface, we called the front end of its storage tube . Front-end storage is often used to monitor bandwidth is not very adequate environment . Some environmental inconvenience Zhuangkuan Dai , the use of front-end storage capabilities , thus saving play a video surveillance monitoring results, to say that is an option.
8 ) Product Line
Most of the larger surveillance systems, often applied to various types of products, due to the current all -party video management software and is compatible with other brands of IPC is difficult . Therefore, in order to monitor the system choose the brand , it is necessary to consider whether the brand has a rich product line to be able to meet the needs of a variety of environments , as well as system solutions capabilities. Such as support for infrared , support WIFI wireless , support POE, supports fiber access, support PTZ , support zoom, so if there is video server with some special combination of analog cameras and whether the video decoder can access the TV wall and so on.
9 ) Software Features
Most monitoring systems require centralized management, so the video management software features are powerful , the interface is friendly and also in product selection must be taken into account. Management software modules more, so the identification of the merits of video management software requires comprehensive consideration , can not be overstated certain function , a function can not ignore the need to take the actual demand .
In addition to these nine outside , infrared night vision capability , ultra- low-light , wide dynamic range , light suppression and other functions are also some important parameters of IPC . In summary , IPC selection needs to have a certain expertise and to be more patient . Do not choose expensive just choose right , I hope you choose to own a suitable IP network camera.
From:http://www.vstarcam.com/channel/Teach-you-to-do-a-smart-network-camera-buyers-332.html