Many users are wondering how to upgrade an existing CCTV system to the latest standards. Currently, AHD cameras are enough to get high-quality images.
Let's look at one of the relatively "young" standards, which has already managed to find its own niche in the implementation of effective video surveillance systems.
What is technology?
AHD cameras - what is it? The innovative format facilitates the transmission of image and sound over standard cables over a distance of more than 500 meters without delay and loss of picture quality. In fact, the technology is nothing more than a successful symbiosis of analog and digital signals.
AHD cameras are a real boon in the first place for those users who need to establish the ultimate control over the object, tracking what is happening on the site thanks to a high-quality picture. Consumers who resort to installing such equipment get rid of the need for fundamental changes in the cable route system.
Modern AHD cameras - what is it? First of all, reliablea solution that allows you to save money on the organization of effective video surveillance. Despite the budget cost, the technology works perfectly when connected to ordinary network devices without the need for complex settings.
Features of operation
AHD cameras are capable of operating in several modes: as standard analog systems, in high definition or as IP technology. This allows you to combine visual control tools already installed at the facility with devices operating in an innovative format into a single system.
The technology supports CMS systems and cloud services. Therefore, setting up an AHD camera is not difficult for those users who are familiar with organizing video surveillance using long-established tools.
During the operation of cameras of the new standard, it is possible to connect alarm inputs and outputs, activate the information backup system.
Structure
The technology is based on the following elements:
- An image processor connected to a signal transmission unit in high definition.
- Special audio and video codecs that form an available signal for the digital processor.
- Megapixel matrices that convert the light flux into electrical signals.
- Innovative lenses that dramatically improve clarity and overall picture quality.
ConnectionAHD cameras
Most relevant for those who are seriously thinking about the application of technology, there is a question about how to connect this miracle of engineering. Let's take a look at how to integrate AHD cameras into your CCTV system.
For starters, it is extremely important to form a general idea of the structure of the future scheme. Therefore, it is worth finally deciding what kind of observation is required at the current moment: external or internal.
When purchasing AHD cameras, you need to take into account the area of the room or the object as a whole. Features of individual areas require the use of a different number of cameras, adjusting their work in accordance with specific conditions.
If we talk about storage for information, then as such, you should select hard drives, the volume of which is sufficient to save video files of a rather impressive size, since we are talking about a high-resolution picture.
Special attention deserves the type of system being designed. If you need to use IP technology, it is recommended to use wireless connection of cameras. Implementing other schemes, you will have to stock up on a two-wire KVK cable and special DC connectors.
How to connect an AHD camera? The device can be powered both from the mains adapter and from the built-in battery. You can also resort to connecting the surveillance device with an Ethernet cable, which, if necessary, can act as an effective source of energy.
Advantages of Technology
The outdoor AHD camera differs from the widely demanded HD, IP and SDI systems in the following ways:
- Relatively low cost.
- Transmission of a high-quality signal without the installation of auxiliary equipment.
- No need to train personnel to operate the surveillance system.
- Easy upgrade of existing analog circuitry.
- Slight signal delay.
- Highest picture quality for live broadcasts.
- AHD-cameras are distinguished by the presence of a durable, sealed housing, which allows the equipment to function without problems in domestic climatic realities.
- The presence of infrared illumination allows surveillance cameras to function at night as effectively as during the day.
- You can control the system remotely from anywhere with a high-speed Internet connection.
Flaws
First of all, organizing a video surveillance system using AHD cameras will be an order of magnitude more expensive compared to the same IP recorders. Investments will become especially tangible in the implementation of large-scale projects.
Two cables are required to power one AHD camera. At least, such a connection method is currently the only one possible for the implementation of the technology. At the same time, to organize an IP surveillance system, it is enough to use one cable, which will satisfy the need forenergy for more than a dozen cameras.
But the main drawback is the lack of the ability to view data without a special device that is responsible for changing the video format. Because the signal transmission is not compressed, the camera cannot be connected to the monitor directly.
In conclusion
As you can see, AHD technology has all the advantages that are characteristic of the analog and digital format for transmitting visual data. In addition, the standard is practically devoid of shortcomings. Therefore, we can safely consider the innovative format as a good prospect for the future.
The decision to organize a surveillance system based on AHD cameras looks justified in cases where it is necessary to obtain an easy-to-use, extremely effective budget tool. When modifying the old scheme, this option allows you to avoid unnecessary expenses for the organization of a new cable structure and staff training.
All of the above features make replacing an old CCTV system with AHD standard cameras a completely justified solution.
