DVRs for the home belong to the category of devices that record and process signals that come from security systems. They are necessary for broadcasting images on a monitor, archiving records and transferring them to a local network. Such a device is the main element of video surveillance and directly affects the functioning of the entire system.
Destination
Hidden street video recorders for home notify owners of an invasion of the territory due to the possibility of recording any movement. In addition, they prevent the robbery of the house.
So, you can track the employment of workers on the site, regardless of their location. The surveillance system allows you to solve many controversial situations, for example, to identify the person who committed the crime, or to record the construction process of various objects in the territory.
Kinds
Hidden DVRs for the home are divided into several varieties:
- Mixed are multi-functional devices that can record, save, broadcast and process files from various cameras. They can be installed in any convenient place, the only drawback is the rather high cost.
- Network stores video that is transmitted to them from digital devices. They are designed for installation inside the building and have limited functionality.
- The private home digital video recorder provides recording, viewing and saving video files. It is used in analog devices, has an expanded list of features, excellent recording quality, and everyone can afford it.
- Registrars for vehicles are intended only for recording and viewing video images. They are fixed inside the car on the windshield.
Each type of device, as the name implies, provides surveillance of the surrounding area and a record of everything that happens. As security systems, the most widespread are wireless sets of equipment.
Benefits
What else do you need a dvr for? Cameras for the home are also used when necessary to monitor the parking lot, garage cooperative, storage facilities and private estates. Devices equipped with motion sensors and used on the street have many functions that are not inherent in the equipment installed in cars:
- Record any movements. The design has an infrared receiver that is triggered for every sound and movement within the scope.
- A memory card provides long-term file storage. It is possible to purchase cards with a large recording volume.
- Self deletion of files. If there is no free space on the card, shooting will continue further after the first recording is automatically deleted.
- Protection against negative environmental effects. The presence of a special housing prevents moisture and dust from entering the internal elements.
- Recording is independent of 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.
- Equipped with a remote control allows you to adjust the operating mode at a distance.
Specifications
Any home video recorder with a motion sensor has the following technical parameters:
- Frame size.
- Motion triggered.
- The ability to choose a compression method.
- Several connectors for cameras of various kinds.
The device can simultaneously be connected to several cameras, due to which the entire adjacent territory is controlled, and there is no need to purchase additional equipment.
Formats
Today, there are several basic compression formats. These include the following: H.264, MPEG4, and MJPEG. The latter option became 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 the files are saved by encoding. The most popular format is MPEG4, it skips identical frames, so the recording takes up minimal space and provides space saving for the following files. H.264 is a state-of-the-art compression method that delivers high definition and rich image reproduction. In addition, recorded files require even less free space.
The DVR for 4 cameras for the home, equipped with a motion response function, turns on at the slightest movement in the coverage area, and it is possible to change the time of the shooting. The optimal resolution is 720 by 526 pixels. Files in this format are displayed in full and are high definition.
Principle of operation
After installing and turning on the recorder, recording of what is happening begins. All types of equipment have a general 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 whose weight is less than 20 kg. The signal is transmitted to the DVR from the camera. Recording is carried out for a specified period of time and is stored in memory on demand or immediately broadcast on the monitor. After identifying the source of movement, the signals can go on one or several screens. This determines the installed 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 slightly different. Such devices begin recording immediately after switching on and produce until they are turned off.
Browse Files
Access to the network device is possible through:
- Mobile phone apps. As a rule, these are programs for Android and iOS, there is also software for WindowsPhone and Blackberry.
- Network clients for the computer. Linux has almost gone out of use, Windows has taken its place, and MAC is also found.
- The browser on both mobile and stationary systems.
Hybrid devices
Today, hybrid home dashcams are becoming more common. 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 transfer of video files, which does not depend on the distance between devices.
- Profitability achieved by the use of analog devices in the absence of the need for high detail.
- Improving the efficiency of the existing system by adding several IP cameras, for example, to capture faces or areas that require good detail.
Home DVR
Modern systems can be supplemented by a different number of video inputs, the number of surveillance cameras determines this parameter. That is, a device for 16 channels is designed to record and store data transmitted from 16 cameras. The stationary video recorder for the house can have 64, 32, 16, 8 and 4 inputs.
It is also worth noting other key features:
- The resolution of cameras in modern devices can be different, for example, megapixel or standard.
- One system can be equipped with several recording devices with different operating principles (AHD + HD-TVI or IP + SD + AHD).
- Ability to view from anywhere through cloud storage. Such a function is especially convenient in the absence of a static IP and if you need to remotely view files.
- Depth of archiving. A modern DVR for 2 cameras for the home stores recordings on the built-in disk, so that files can be stored for a long time.
The choice between budget and expensive equipment
When choosing a device, you should pay attention to its key parameters:
- The number of audio channels. If the recorder has only one channel, it is likely that it is tied to a specific camera.
- Hard disks. As a rule, one hard drive can be connected to budget systems, there is also the possibility of restrictions on the volume of HDD. Some devices may not work correctly with 3 TB drives.
- Convenient use of the archive and interface. Many home video recorders are not the most convenient search for the necessary files and the standard menu.
- Alarm inputs. They are designed to enable recording after triggering external sensors. Despite the fact that the bulk of the equipment is equipped with a software built-in detector, false alarms due to various disturbances are possible. The best option is to install additional security detectors. Thanks to the presence of several alarm inputs, it is possible to connect a GSM-alarm, siren and other add-ons.
- Existence of the special interface for control of the PTZ type camera and application of the additional panel.
- Using a DVD-RW or CD-RW drive. Currently, the need for this function arises less and less due to the fact that many DVRs for home can transfer the archive to flash cards.
- Support for 3G modems. In their connection today most often there is no need, since new types of modems are constantly appearing, and the former become irrelevant. The best option would be to purchase a device with a built-in GSM module if you need to access the system through mobile channels.
AHD technology
The main advantage of this technology is the transfer of files over long distances. It is carried out through a coaxial cable and maintains its previous quality even at a distance of 500 meters. At the same time, IP systems can also transmit data over long distances, but only if the formation of a fiber optic network or the addition of special equipment.
Since the signal is not affected by the quality of the equipment used, it is transmitted without delays, is not compressed, and forms an informative image on the monitor. At the same time, transmission of control signals and audio files is possible.
Such a video surveillance video recorder at home is not affected by interference, which is a common problem when transferring files, due to the presence of low-frequency technology. The installation diagram is similar to the installation of analog devices. For transmission, coaxial and combination cables are used. If you have experience using analog equipment, there is no need for special skills, which is especially important if the existing system is supplemented.