[
Huaqiang Security Network News ] The role of surveillance video recorders in surveillance engineering should not be underestimated. It can display the monitoring images in real time. The development of surveillance video recorders in recent years is also quite huge. So what is its principle?
The surveillance video recorders are based on the core chips used, some are based on digital signal processors (DSPs), from the system structure, there are PC card type or embedded integrated models; and some are based on application specific integrated circuits (ASIC), which are based on The structure of DSP is divided into different series, which are different depending on the DSP of different manufacturers; while the technology for processing video from video recorder (video compression format) is based on Wavelet, M-JPEG, MPEG-1, MPEG. - 2, MPEG-4, H.263, H.264 and other video compression formats of many different models. In addition, whether it is a PC card type or an all-in-one model, even if the chips used are the same, the interface and functions of the application software are not the same. The PC-based single-card multi-channel DVR with different implementation principles needs to use time-division rotation to collect multiple video signals and record in M-JPEG compression format. The video compression algorithm based on interframe prediction loses its meaning, and only the intraframe compression algorithm can be used. Therefore, the DVR of this type independently performs JPEG compression processing on each frame of the captured image, and then forms an independent M-JPEG file corresponding to each frame of each input. In this way, it is obviously convenient to implement multi-channel acquisition. For example, it is convenient to accommodate up to 16 channels of video input without considering the continuity requirement of the video picture, but for the video only at a rate of 25 frames/s. For a video processing chip that collects signals, no matter how many video signals are switched to their inputs in turn, the "total resources" of 25 frames/s cannot be changed. Therefore, for this type of hard disk recorder, The maximum average frame rate of the road picture is only 25/16 = 1.56 frames/s (ideal value). Shortly after the introduction of single-card single-channel DVRs, manufacturers introduced multi-channel AV cards that integrate two or even four video processing chips (DSP or ASIC) on one card, so that two signals can be simultaneously implemented. Real-time acquisition and compression processing of 4-channel signals.
The improved surveillance video opportunities are more in line with people's needs, understand the implementation principle, and have a clear outline for the development of surveillance video recorders.
Glass Sliding Door
Products characters
1.All the products produced by good quality building material factory need get through three strict inspections before packing: Raw material cutting test, Production process inspection, The finished debugging.
2.Providing customized service to apply each customer requirements, we will try our best to achieve 100% customer satisfaction.
Profile
1.High quality aluminum alloy profiles, thickness 1.2-2.0mm
2.Excellent quality thermal break aluminum profiles, thickness 1.4-3.0mm
3.PVC/UPVC material (need to be ordered)
Color
White/ Sliver / Grey / Champagne / Black / Wood grain / special color can be ordered
Glass Type
1.Single toughened glazing:6mm/8mm/10mm/12mm...
2.Double toughened glazing:5+12A+5mm/6+12A+6mm...
3.Laminated glazing:5+0.38PVB+5mm/6+0.76PVB+6mm...
4.Low-E glazing:Green/Blue/Brown/Golden...
5.Other glazing:frosted glass/crystal glass/art glass...
Mesh
1.Aluminum security mesh
2.Stainless steel security mesh
3.Solid iron security mesh
4.Mosquito net(Nylon,Stainless steel,Diamond)
Hardware
1.Germany brand
2.Japanese brand
3.Chinese top brand
Surface treatment
1.Anodizing
2.Powder coating
3.Electrophoresis
4.Fluorocarbon paint
Glass Sliding Door,Tempered Glass Sliding Door,Double Glass Sliding Door,Automatic Glass Sliding Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfhighspeeddoor.com
