Compact video recorder in digital video surveillance systems.
What control methods are most often used in crowded places?
If you think about it, then in most cases the answer will be video surveillance.
Digital video surveillance has become so integral to everyday life that no one pays attention to video surveillance cameras.
Very often, it is impossible to see the cameras at all, since the size of modern mini-cameras allows you to create full-fledged hidden video surveillance systems.
In the vast majority of cases, hidden digital video surveillance makes it possible to quickly expose fraudsters, offenders, dishonest employees and clients.
In addition, digital video surveillance is used in cars to protect the owner from car scams on the roads and car thefts.
For this, special car video recorders are used. Constant video surveillance is carried out in offices for remote monitoring of employees, in parking lots, in stores, banks, in private houses and apartments.
For those who have decided to build a hidden video surveillance system on their own, here is how to do it with minimal time and money.
After all, with the introduction of new digital technologies, equipment has become smaller in size and easier to configure.
The traditional scheme for building a hidden video surveillance system includes purchasing one or more video cameras, a computer or VCR, laying power cables and video signal transmission cables.
But, as we said, now everything has become much simpler.
To create a hidden video surveillance system, you can use a miniature digital video camera with a recording function — a video recorder.
A video recorder is a miniature device smaller than a matchbox.
With the help of video recorders, you can create miniature, but at the same time fully functional video recording systems.
The video recorder has its own microprocessor that processes video and audio information coming into the cameras and stores it on a portable flash card.
The video recorder uses an autonomous power source (battery) to operate.
The video recorder can operate with various external devices; if necessary, one or more video cameras and an external microphone can be connected to it.
Thus, the video recorder provides high-quality security and control, despite its small size.
The principle of operation of the video recorder.
The miniature digital video recorder can operate continuously for more than six hours in continuous recording mode and more than one year in standby mode.
Such operating periods are provided by a capacious lithium-polymer battery.
The microprocessor, which the video recorder is equipped with, allows you to use any type of camera to build a full-fledged digital video surveillance network.
The video recorder supports the following video signal standards: PAL, NTSC, black and white video.
The video recorder is equipped with built-in sensors and is capable of responding to voice or movement.
As soon as a signal is received from any of the sensors, the video recorder activates the recording of everything that happens in the coverage area, this allows you to save memory and battery charge.
The video recorder is enclosed in a sealed case, it is not afraid of moisture and dust.
Using a modern flash card allows you to record in vibration conditions without worrying about the quality of the recorded signal. The recording is saved on the flash card in *.avi format.
This format can be played on any multimedia device.
Autonomy and independence from a computer and video server allow you to use the video recorder to quickly build an effective video surveillance system.
The advantage of the video recorder is its size and weight, which does not exceed 50 grams.
Such a device is very easy to place in inconspicuous places, thanks to which digital video surveillance becomes truly hidden.
The video recorder has its own protection system. For this purpose, a so-called watermark is applied to all the footage.
If necessary, the digital video recorder can operate from a car cigarette lighter.
A short list of the functional capabilities of the video recorder:
-various degrees of video signal recording compression;
— operation from a remote control;
— built-in calendar and clock;
— ring or linear recording function. (Ring recording — when the flash card is full, newer records erase old ones. Linear recording continues until the memory is full and stops.)
Using the built-in clock and calendar is very convenient when you need to find a particular section of the recording.
Thanks to digital technology, finding the desired section of the recording on the computer takes no more than one minute.
Car DVR.
It has already been said that the video recorder can operate in conditions of shaking and increased dustiness. Thus, it becomes possible to use the video recorder in a car.
Motorists will find the use of a video recorder on the roads very useful. At the beginning of the article, we mentioned car scams on the roads.
The essence of the fraud is that the driver is forced to hit a car next to him and under the pretext of paying for the repair of an expensive foreign car, money is extorted.
Sometimes, scammers stage a blow without even touching your car. It is for such situations on the road that a video recorder is needed.
Bribes extorted by traffic police officers have become a common practice. However, if an inspector sees a video recorder, it immediately changes beyond recognition.
And a polite traffic cop is a very rare sight.
A video recorder in a car can have several additional video cameras for wider coverage of the space around the car.
Most often, car owners choose special car DVRs.
The DVR has a built-in video camera with high video resolution and a night shooting function. Thus, the image will be of high quality even in the dark.
Such a DVR can be installed on the windshield of your car without additional costs.
When driving around the city, the DVR saves all the information on a flash card.
On average, 1 Gb can hold about two hours of video recorder recording if you use high-quality color recording.
If you choose medium or low recording quality, the memory will be enough for more than 100 hours of recording.
However, as practice shows, it is better to set the maximum quality and turn on the ring recording mode.
In this case, in the end, there will only be the most recent high-quality video recording.
Properly organized digital video surveillance will always help protect yourself and your car.
The video recorder is very easy to set up and install in any room or car.
It will show how employees work in the absence of the manager, how attentive the visiting nanny is to the child.
In addition, if you inform people that they are being watched, this leads to increased labor discipline and an improvement in the quality of the work performed.
In turn, hidden video surveillance will allow you to independently bring fraudsters and unscrupulous workers to light.