Video recorders for the home belong to the category of devices that record and process signals that come from security systems. They are necessary for broadcasting the image on the monitor, archiving records and transferring them to the local network. Such a device is the main element of video surveillance and directly affects the functioning of the entire system.
Purpose
Outdoor hidden video recorders for the home notify owners of the intrusion into the territory due to the ability to capture any movement. In addition, they help prevent home robbery.
So, you can track the employment of workers on the site, regardless of your location. The surveillance system allows you to solve many controversial situations, for example, to identify a person who has committed a crime, or to record the process of building various objects on the territory.
Views
Hidden DVRsfor the home are divided into several varieties:
- Mixed are multifunctional devices capable of recording, saving, broadcasting and processing files from various cameras. They can be installed in any convenient place, the only drawback is the rather high cost.
- Network stores the video that is transmitted to them from digital devices. They are intended for installation inside a building and have limited functionality.
- Digital video recorder of a private home provides recording, viewing and saving files in video format. It is used in analog devices, has an extended list of features, excellent recording quality, and its purchase is affordable for everyone.
- Vehicle recorders are for recording and viewing video images only. They are fixed inside the car on the windshield.
Each type of device, as the name implies, provides monitoring of the surrounding area and recording everything that happens. As security systems, wireless equipment kits have become most widespread.
Benefits
What else do you need a DVR for? Cameras for the home are also used when it is necessary to monitor the parking lot, garage cooperative, warehouses and private property. Devices equipped with motion sensors and used outdoors have many functions that are not inherent in the equipment,installed in cars:
- Record any movements. The design includes an infrared receiver that responds to every sound and movement within coverage.
- The presence of a memory card ensures long-term storage of files. At the same time, it is possible to purchase cards with a large recording capacity.
- Self-delete files. If there is no free space on the card, shooting will continue after the first recording is automatically deleted.
- Protection from the negative effects of the environment. The presence of a special case prevents moisture and dust from entering the internal elements.
- Recording is not affected by lighting and other factors. The quality of shooting remains high and clear at any time of the day.
- Connect to a computer or TV.
- Ability to view a file recorded at a specific time.
- Equipment with a remote control allows you to adjust the operation mode from a distance.
Features
Any motion-sensing home DVR has the following specifications:
- Frame size.
- Triggered by movement.
- Choose the compression method.
- Multiple connectors for different kinds of cameras.
The device can connect to multiple cameras at the same time, so that the entire surrounding area is under control, and there is no need to purchase additional equipment.
Formats
There are several basic compression formats today. Among theminclude the following: H.264, MPEG4 and MJPEG. The latter option has become less common after the advent of more modern methods. A characteristic feature is the rapid use of free disk space due to the fact that files are saved by encoding. The most popular format is MPEG4, which skips identical frames, making the recording space-saving and saving space for later files. H.264 is a state-of-the-art compression method that delivers high-definition images with rich hues. In addition, recorded files require even less free space.
DVR for 4 cameras for home, equipped with a motion detection function, turns on at the slightest movement in the coverage area, while changing the shooting time is possible. The optimal resolution is 720 by 526 pixels. Files in this format are displayed in full and are of high definition.
Working principle
After installing and turning on the recorder, recording of what is happening begins. All types of equipment have a common principle of operation, with the exception of some features inherent in some of them.
The device turns on for a few seconds when motion is detected. However, it does not work on animals weighing less than 20 kg. The signal is transmitted from the camera to the DVR. Recording is performed for a set period of time and stored in memory untildemand or immediately broadcast on the monitor. After identifying the source of motion, signals can go to one or more screens. This determines the set mode and the number of connections. Files can be viewed not only during operation, but also after shutdown.
The principle of operation of automotive equipment is somewhat different. Such devices start recording immediately after being turned on and continue recording until they are turned off.
View files
The network device can be accessed via:
- Mobile phone applications. As a rule, these are programs for Android and iOS, there is also software for Windows Phone and Blackberry.
- Network clients for a computer. Linux has almost gone out of use, Windows has taken its place, MAC is also found.
- Browser on both mobile and desktop systems.
Hybrid devices
Hybrid DVRs for the home are becoming more and more common today. They can simultaneously combine analog equipment and IP cameras (or HD-SDI). Such systems have many positive aspects, among which the main ones are the following:
- High quality video transfer that does not depend on the distance between devices.
- Economy achieved by using analog devices in the absence of the need for high detail.
- Improve the efficiency of the current system byadding several IP cameras, for example, to capture faces or areas of the territory for which good detail is needed.
Home DVRs
Modern systems can be supplemented with a different number of video inputs, the number of surveillance cameras determines this parameter. That is, a device with 16 channels is designed to record and store data transmitted from 16 cameras. Fixed home DVR can have 64, 32, 16, 8 and 4 inputs.
Other key features are also worth noting:
- The resolution of cameras in modern devices can be different, for example, megapixel or standard.
- One system can be equipped with multiple recording devices with different operating principles (AHD + HD-TVI or IP+SD+AHD).
- Viewable from anywhere via cloud storage. This feature is especially useful if you don't have a static IP and if you need to view files remotely.
- Backup depth. A modern 2-camera home DVR saves recordings on the built-in disk, so the files can be stored for a long time.
Choosing between budget and expensive equipment
When choosing a device, you should pay attention to its key parameters:
- Number of audio channels. If the recorder has only one channel, there is a possibility that it is tied to a specific camera.
- Hard drives. to budgetsystems, as a rule, can connect one hard drive, and there is also the possibility of restrictions on the size of the HDD. 3 TB drives may not work properly on some devices.
- Convenient archive usage and interface. Many DVRs for home are not the most convenient search for the necessary files and the standard menu.
- Alarm inputs. They are designed to start recording after the operation of external sensors. Despite the fact that the majority of equipment is equipped with a software built-in detector, false alarms may occur due to various interferences. The best option is to install additional security detectors. Due to the presence of several alarm inputs, it is possible to connect a GSM alarm, siren and other add-ons.
- The presence of a special interface for controlling a PTZ camera and using an additional remote control.
- Using a DVD-RW or CD-RW drive. Currently, the need for this function is becoming less and less due to the fact that many DVRs for home can transfer the archive to flash cards.
- Support for 3G modems. Most often there is no need to connect them today, as new types of modems are constantly appearing, and the former ones are becoming irrelevant. The best option would be to purchase a device with a built-in GSM module if you need to gain access to the system through mobile communication channels.
AHD technology
The main advantage of thistechnology is to transfer files over long distances. It is carried out through a coaxial cable and retains the same quality even at a distance of 500 meters. At the same time, IP systems can also transmit data over long distances, but only if an optical fiber network is formed or supplemented with special equipment.
Since the quality of the equipment used does not affect the signal, it is transmitted without delay, is not compressed and forms an informative image on the monitor. At the same time, control signals and audio files can be transmitted.
This home surveillance DVR is free from interference, which is a common problem in file transfer, due to the presence of low frequency technology. The installation scheme is similar to the installation of analog devices. Coaxial and combined cables are used for transmission. If you have experience in using analog equipment, there is no need to acquire special skills, which is especially important if you are supplementing an existing system.
