What affects the cost of video surveillance systems
What is needed for a video surveillance system, how it works, what equipment is needed and what affects the price.
We will explain the difference between an analog AHD and an IP camera, choose digital recording devices, connect with cables, as well as the most important concepts that everyone encounters when shopping.
Most importantly, it will help you choose the right video viewing system for your house, apartment or business premises.
We will try to explain it gradually.
A brief introduction to the concept of video surveillance
In the age of information technology and video surveillance technology, it has become an integral part of life and a normal occurrence on every corner. We see cameras all around us.
Traffic is monitored on busy streets, workers are monitored by workers and what happens at work, goods are in warehouses, private property is in a house or apartment.
A video surveillance system is a technical protection of people and property that records everything that “tomorrow” can be very important if something happens.
The purpose and application system are protection against theft, employee control, security reasons, etc.
Which consists of a video surveillance system
The entire system consists of cameras, storage equipment and video and video cables, all connected.
In practice, there are many variations on the theme because the system can be connected to an alarm system or have microphones to record sound.
You can also connect cameras with the recorder wirelessly, in which case we do not need data cables.
All of these are additional features that you choose when designing a video surveillance system according to your capabilities and needs.
When choosing the right video surveillance equipment, you need to be well informed and know exactly what your needs are.
To be informed, at least a detailed insight into the technical capabilities and specifications of the equipment and to know something about the characteristics and purposes.
Before buying video surveillance equipment, the needs must be clearly defined so that there is no conversion and at the end of an unexpected result.
And when you eventually decide on a particular video surveillance and all its components, it is best to re-read all the details, and if you are not sure, consult with us about installing the system.
As we promised step by step ...
Use video surveillance
The most basic use of video surveillance is to increase the safety and security of people and property at risk. Police video surveillance is used to increase the safety of citizens or to detect criminal activities. Traffic police use the same to track traffic and punish unimportant drivers. Retail store owners use video surveillance to prevent theft or to monitor workers. Factories are set up to monitor and monitor certain processes and machines. Large retail chains use video surveillance to monitor consumer behavior and create a “heat map” of movement. Based on all the above, we can conclude that the use of video surveillance is wide.
Video surveillance cameras or short surveillance cameras
Cameras are divided according to different criteria: what is the resolution of the video that the camera can record, or has a night mode (recording in the dark), which includes water resistance or impact resistance, of which the material is composed.
These are all characteristics that need to be considered and, of course, those that are relevant to their needs to be identified.
For example, if you want to capture the space inside a house or apartment then the camera does not have to be waterproof and durable, but it will probably be necessary to have a night mode.
On the other hand, if you want to capture some space in the yard of course, the camera must be waterproof. It is important to install in an enviable or hanging on the ceiling or vertical wall way.
And so on to aesthetics, where you can choose camera shapes and colors for the environment in which it will be set.
When the cameras in question should also pay attention to the various camera options such as night mode, the ability to remotely control focus and zoom, whether it has a memory card slot, etc .. All these options should be considered, but only after defining what they are the needs of a video surveillance system you are planning.
To learn more, visit our " Surveillance Cameras " and special page " IP Video Surveillance Cameras ."
DVR and NVR digital video recorders
When choosing the right video recorder - DVR or NVR, you need to take care of several things. The first is the number of camera inputs, this is the maximum number of cameras that can be connected to the recorder. We should always consider future capacity expansion.
The next thing is the memory, that is the HDD (hard drive) of the recorder, as it depends on how many videos you can record and save back.
In principle, it is better to have as much space as possible, but more space with it also leads to a higher cost of the entire system, so it is recommended to adjust the storage space to the real needs.
Attention should also be paid to the maximum read / write speed, as well as additional features such as PoE power, alarm outputs, and outputs for playing back recorded material.
For more information on digital video recorders, read " DVR recorders for video surveillance ".
Video surveillance cables
In order for the video surveillance system to use the radio, it must be properly connected. When it comes to cable, there are a few important things. The first is the distance of the camera from the DVR or NVR. Cables are available for attenuation over certain distances and these specifications must have otherwise you would achieve poor quality videos or inability to signal to the desired destination.
Another thing is the technical capabilities of the cable. If you use a coaxial cable, you will need an additional camera power cable (if you do not use a RG-59 coaxial cable that has a power pair) and if you use a UTP cable you can use one pair to power the camera when the DVR or NRV has a power output Power over Ethernet).
For more information on cable, features and capabilities, see the " UTP cable and coaxial cable " page.
This question seems to be of most interest ...
What affects the cost of video surveillance
This excuse can be used when choosing equipment. Of course, this is not always the case, but in most cases it is. There are low-cost manufacturers of video surveillance equipment up to these premium variants. This does not necessarily mean that the most expensive is always the best, it depends on the needs. There are cases where the need for high-quality equipment is unavoidable and there are those that do not have a high-resolution image.
The point is that the needs are optimally adjusted and in this way the best solution is chosen. In addition, the video surveillance equipment must be compatible with each other, otherwise it will not work, or the end result will be poor quality video material.
Video surveillance should not be seen as a cost but as an investment. Investing in CCTV is an investment in our security, greater security and it is unlikely, you know you have all the records and so you will be able to prove certain events.
Is it worth investing in video surveillance?
As we wrote in the subheading, this is an investment and it is profitable. In most cases, video surveillance pays off in several ways, simply because it is built-in.
So if you have an online auto parts store, for example, and you've noticed a shortage in the market for the past month, and you don't know how money has disappeared from video surveillance sites, and once that happens, you can from the comfort of your office or home into the trap of events in action and where the problem is.
Then video surveillance itself is one of the deterrents to potential thieves violations that are set to be achieved. It’s not the same when there are cameras on or in the facility and when everything is left to employees or passers-by, but if someone accidentally sees something.
This fact will affect the likelihood that some places will decline sharply.
The answer is short and clear - Yes, it's worth it.
Video surveillance - basic sharing
Video surveillance, like all other techniques and technologies, has advanced over time and is becoming more powerful. Today, with the help of the most advanced equipment, we see from a great distance, all the details of the face do not raise the question of what more video surveillance can do than what it costs.
Video surveillance is divided into:
- Analog video surveillance
- IP video surveillance
Analog and analog HD video surveillance
Analog video surveillance in the domestic market is still the most surprising due to its affordable price. In more advanced countries, it is largely replaced by more modern IP video surveillance.
Analog video surveillance can be divided into two types:
- Analog CCTV (closed circuit TV)
- AHD (analog high definition)
Analog CCTV video surveillance
Standard video surveillance, which has the longest presence on the market and is still the most commonly installed in the domestic market due to its affordable price. CCTV video surveillance consists of analog cameras connected to a RG59 coaxial cable recorder. You need the power cord to power the camera.
With this system, a limited number of people can access video materials from a single location at a time.
The highest resolution video that CCTV can provide is 720p (HD).
So, the conclusion is that AHD technology has many advantages over CCTV. Better results (video quality) for the same money invested. Greater universality and more opportunities for future changes and upgrades.
IP video surveillance is a more modern type of video surveillance than analog CCTV. Communication or data transfer takes place via UTP cable. There are many advantages over CCTV, but the main one is the quality of the video material or images. There is also the option of powering the camera via a network cable, various benefits of recording and storing video, about this and more about what sets IP video surveillance apart in the text below.
Resolucija IP kamer je HD (High Definition), oziroma 720p in Full HD oziroma 1080p. Ta funkcija odpre veliko več priložnosti za nekoga, ki uporablja videonadzor te performanse. Večje razdalje je mogoče prebrati iz avtomobila z uporabo progresivnega skeniranja, glej več bankovce na bankovcih, jasno vidimo obraze ljudi in lažje štetje ljudi v mase. Vse to je mogoče zaradi boljših kamer.
HDSDI (video posnetek visoke ločljivosti serijskega digitalnega vmesnika)
HDSDI video nadzor uporablja koaksialni kabel za prenos digitalnega signala. Tehnične značilnosti pravijo, da je največja možna ločljivost 1080p (Full HD), kar je odličen rezultat. Cena te vrste sistema je povsem konkurenčna z novimi sistemi IP. In za tiste, ki že imajo star sistem CCTV in želijo to izboljšati, ni treba spreminjati namestitve, ampak samo stare kamere nadomestijo nov HDSDI.
Za sistem HDSDI bodite pozorni na razdaljo kamer z diktafona , zlasti na dolžino kabla, ki ne sme preseči 50 metrov. V nasprotnem primeru lahko pride do motenj ali nezmožnosti prenosa signala. Pri izbiri koaksialnega kabla morate izbrati bolj kakovosten koaksialni kabel RG59.
HDCVI (visokozmogljivi kompozitni video vmesnik) video nadzor
Video nadzor te vrste je zelo podoben sistemu HDSDI. Vendar ima eno zelo pomembno prednost, kar je največja dolžina kabla, v katerem signal ne bo šibkejši in je 100 metrov , v nasprotju s HDSDI na 50 metrov.
Ta tehnologija je bila med prvimi, ki jih je Dahua uporabljala na svoji opremi za video nadzor.
Druge tehnične lastnosti so skoraj enake. Največja možna ločljivost je tudi 1080p (Full HD) , prenos je preko koaksialnega kabla . HDCVI video nadzor je kompromis med zastarelim CCTV sistemom in novimi sistemi IP, ki so veliko dražji, zato se ljudje večinoma odločijo za ta video nadzor .
Video nadzor - Enciklopedija pogojev
Pod besedilom bomo dali nekaj pomembnih izrazov in pojasnil za vsakega posebej. Ko gre za video nadzor in kadar je sistem načrtovan ali načrtovan, se vedno sklicuje na nekatere podobne značilnosti ali ukrepe za različne funkcije opreme za video nadzor. Poskušali vam bomo razložiti, kaj pomenijo, ko vidijo njihov pomen pri izbiri opreme.
Each screen consists of a large number of pixels on itself or pixels. Each pixel has three better ones - red, green and blue. By combining these three, each color is better. The resolution, in a literal interpretation, represents the number of pixels on the screen. They are an ordered matrix and when we express resolution, for example Full HD says that the resolution is 1920 × 1080 pixels (1920 in the horizontal and 1080 in the vertical direction). The higher the resolution, the better the image (cleaner and clearer).
Maximum video resolution:
- 976 × 496 - CCTV system with standard 700TVL - standard resolution
- 1280 × 960 - resolution CCTV, IP, HDSDI and HDCVI - HD 720p
- 1920 × 1080 - IP, HDSDI and HDCVI - FullHD 1080p resolution
- 2048 × 1536 - IP resolution FullHD 4: 3
IP (Ingress Protection) - the degree of resistance of the camera
0 - without special protection
1 - protection against solid objects over 50 mm
2 - protection against hard objects over 12.5 mm
3 - protection of steel objects larger than 2.5 mm
4 - Armor items larger than 1 mm
5 - Protection against dust penetration into the equipment
6 - complete protection against dust penetration
0 - without special protection
1 - protection against vertical dripping
2 - protection against drops
3 - spray protection
4 - Protection against polishing
5 - water jet protection
6 - High pressure water jet protection
A frame represents a single frame or basic component of an image. In analog devices it consists of two hemispheres and in digital form is expressed in the number of dots horizontally and vertically. The minimum number of frames or frames registered by the human eye as a continuous image, i.e. video, is 25.
FPS (number of frames per second ) is the number of frames per second and represents the speed of the video signal. The higher the FPS number, the better the video, ie smoother and more natural. In a video conferencing camera, this term is used in the specifications.
M-JPEG (Join Photographic Group Compression Expert) represents the compression of each frame in the image separately. This type of compression uses a static image algorithm in JPEG format.
MPEG-4 (Compression Standard Standard) is an intelligent compression that monitors changes in a single frame and stores static parts in the same memory. This saves a lot of hard disk space and transfers less data over the network. But on a computer where decompression is performed, a larger processor is needed.
H.264 is the standard for video compression and is much more efficient than the ones mentioned above. One of its main advantages is that it significantly reduces the space required to store video material. In comparison, it saves 50% of space compared to MPEG-4 and 80% of space compared to M-JPEG. H.264 also offers higher resolution and higher FPS. This standard is already largely integrated into the world of IT and is one of the most effective ways to compress video.