How to choose the right NVR? (2024 Guide)
What is a Network Video Recorder (NVR)?
Hard disc video recorder is a set of computer systems for image storage and processing, with a long time video/voice image/voice recording, audio recording, remote monitoring and control functions. It uses digital recording technology, image processing, image storage, retrieval, backup and network transmission, remote control, etc. is better than the traditional analogue video recorder, represents the development direction of the TV monitoring system, is the first choice of the TV monitoring system products on the market.
What are the types of NVRs?
PC-style NVR:
the traditional PC as the basic hardware, equipped with image capture or image capture compression card, the preparation of software to become a complete system.
Embedded DVR: generally refers to non-PC systems, computer functions but not known as computer equipment or devices. It is application-centred, hardware and software can be cut down on the function, reliability, cost, volume, power consumption and other stringent requirements of the miniature special-purpose computer systems.
1.Home card machine:
compact size, using MicroSD card to store data, Wi-Fi networking, easy to deploy.
2.Home PTZ and dome surveillance:
360° dead-angle rotation of the camera according to demand, wide shooting range, and humanoid tracking.
3.Visual doorbell and smart cat eye:
used to monitor the situation outside the door, stranger life visits to know in advance.
What are the features of NVR?
1.Recording:
The video processor is instructed by the application and operating system of the DVR to notify the video analogue-to-digital converter to intercept the image signals and send them to the PC for storage after compression.
2.Playback:
the compressed file saved on the disc will be decompressed on the PC through the application, without the support of the video card.
3.Monitor:
Give commands to the video processor through the application and operating system of the DVR to notify the video analogue-to-digital converter to intercept the image signals, which are not compressed and directly sent to the PC by the video processor.
4.Alarm:
When the alarm function is activated, the application programme detects a section of the incoming image data that is selected by the frame, and if there is any movement, the operating system will tell the sound card to play an alarm sound.
5.Recording:
The system controls the audio post-compression card to record the sound through the software and connects it with the video file, and the application will process the video and sound files at the same time and play them out together when playing.
DVR has a variety of types and functions to meet the monitoring needs of different scenarios, from home to commercial applications are widely used.
How to choose the right NVR?
Choosing the right NVR (Network Video Recorder) requires consideration of several key factors to ensure the stability, reliability and efficiency of your video surveillance system. Here are some of the key considerations:
1.Processor and operating system:
Choose an NVR with a high-performance processor to ensure that it can handle high-resolution video streaming and multitasking operations. Check that the operating system used by the NVR is stable and supports the latest software updates and security patches.
2.Network Interface:
Make sure the NVR has dual network ports and supports load balancing or network redundancy to improve network stability and data transmission efficiency. Ensure that each network port supports at least Gigabit (1000Mbps) network connection to meet the high bandwidth requirements.
3.Video input and decoding capability:
Confirm the number of camera channels supported by the NVR to ensure that it can access and manage all surveillance cameras. Check the maximum decoding resolution and frame rate supported by the NVR to ensure it can smoothly decode high-resolution video streams.
4.Storage capacity and expandability:
Choose an NVR that supports multiple hard drive slots to increase storage capacity. Confirm the maximum hard drive capacity supported by the NVR to meet the demand for long-time video storage. Select an NVR that supports RAID configuration to improve data security and storage efficiency.
5.Video compression technology:
Choose an NVR that supports advanced video compression technology (e.g. H.265, H.264) to save storage space and improve video transmission efficiency.
You can also compare the following NVR parameters and configurations:
6.Video output and display:
Check the display output interface (e.g. HDMI, VGA) provided by the NVR to make sure it can be connected to a monitor or surveillance wall. Confirm the maximum video output resolution supported by the NVR to provide a clear surveillance picture.
7.Intelligent features:
Choose NVRs with intelligent video analysis features (e.g. face recognition, number plate recognition, behavioural analysis) to improve the intelligence of the surveillance system. Check whether the NVR supports multiple alarm linkage functions (e.g. sound alarm, light alarm) to improve the security protection capability.
8.Network protocols and compatibility:
Make sure the NVR supports common network protocols (e.g. ONVIF) to improve compatibility with different brands of cameras. Choose an NVR that supports remote access features (e.g., via mobile app or web browser) for easy viewing of surveillance images anytime, anywhere.
9.Power supply and environmental adaptability:
Confirm the power input requirements of the NVR to ensure that it matches the on-site power supply conditions. Check the operating temperature and humidity range of the NVR to ensure it can operate stably in the installation environment.
10.Brand and after-sales service:
Choose NVRs of well-known brands to ensure their reliable quality and performance. Pay attention to the after-sales service and technical support provided by the manufacturer to ensure that timely help is available when the device has problems.
By focusing on these key parameters, you can select the right NVR to ensure the stability, reliability and efficiency of your video surveillance system.
