VCR is a device that enters the signal captured by security cameras. Without such a device or a video surveillance system can not fulfill its purpose as the cameras themselves can not provide you with an image of the protected object. They only accept signals, then sent to the device, making it formatted and converted into picture, but also in sound when the system is suitable for audio recording.
VCRs are devices that receive, record and store footage from surveillance cameras. These devices vary by variety and working principle, depending on how CCTV use. Here we will introduce you to the types of recorders and differences between different systems.
DVR (Digital Video Recorder) VCR controls and record analog cameras. They have from 1 to 4 audio microphone input and from 4 to 32 video channels, which means that one device can drive cams 32 and also to retain records the captured by them. Every DVR recorder has a certain memory capacity, which determines how much of the video footage will be stored for later review.
DVR recorders may not work with IP digital cameras for surveillance. They are only compatible with analog models, which means that the system change from analogue to digital must be replaced and recorder. Wiring any change must also be completely changed, so that it matches the new system.
NVR (Network Video Recorder) are network devices connected to digital IP cameras for surveillance. These devices take the entire volume of information that high-end digital cameras have imaged in internet connection. In some models NVR VCRs may also provide power to the chambers, which avoids the need to provide a separate power supply unit. This facilitates the construction of the system and makes it significantly less as an expense.
VCR-type devices are Tribrid new generation that allow for several different recording modes-continuous, in detecting motion or after triggering an alarm. This allows you to store much of the memory of the recording device and facilitates the establishment of violations as they capture only suspicious events.
Hybrid Video Recorders
VCR-type Hybrid allows recording of HD – CVI and IP cameras. They also have constant at detecting motion or after activation of the alarm recording mode and enable the management and record both analog and digital CCTV cameras, making them much more comfortable when using the combined systems, also in upgrading the entire system – ordinary when switching from analogue to digital videonalblyudenie.
Hard Disks for Storing Records
Ready digital video surveillance systems utilizing hard disk drives replace VCRs, tape-based recording a very fast pace and this is perfectly logical, given the wide range of possibilities that digital devices provide. Pointing out their advantages can not but mention the most clear standout:
- Higher image quality;
- Ability to add more cameras;
- Larger capacity backup;
- Faster recording and access;
- Better management of the database;
- Enhanced intelligent face recognition;