How DVR and NVR works?
Tags: cctv
Published: 2023-09-04 12:59:33

[Brand I Innovation](https://brandiinnovation.com/) : Digital Video Recorders (DVRs) and Network Video Recorders (NVRs) are both used for video recording and surveillance purposes, but they work differently due to the types of cameras they are designed to support. Here's an overview of how DVRs and NVRs work:

Digital Video Recorder (DVR):

Analog Camera Compatibility: DVRs are primarily designed to work with analog security cameras. Analog cameras capture video in analog format, which is then transmitted as electrical signals over coaxial cables to the DVR.

Signal Conversion: The DVR receives the analog video signals from the cameras and converts them into digital format for processing and storage. This conversion may involve encoding the analog signals into a digital video format, such as H.264 or MPEG.

Video Storage: The DVR stores the digitized video footage on an internal hard drive or external storage device. The video is saved in a format that allows for easy retrieval and playback.

Recording and Playback: DVRs can be set to continuously record video or trigger recording based on motion detection or specific events. Users can review recorded footage using the DVR's user interface or remotely via a connected monitor, computer, or mobile device.

Remote Access: Some modern DVRs offer limited remote access capabilities, allowing users to view live or recorded footage over the internet. However, this feature is generally less advanced than what NVRs offer.

Network Video Recorder (NVR):

IP Camera Compatibility: NVRs are designed to work with IP (Internet Protocol) cameras. IP cameras capture and transmit digital video over a network, such as Ethernet or Wi-Fi, using internet protocols.

Network Connectivity: IP cameras are connected to the same network as the NVR. They communicate with the NVR using standard network protocols, such as TCP/IP.

Recording and Storage: When an IP camera captures video, it sends the digital video stream directly to the NVR. The NVR processes and records this video in real-time. The recorded footage is typically stored on the NVR's internal hard drives or network-attached storage (NAS) devices.

Remote Access: NVRs offer advanced remote access capabilities. Users can view live or recorded video remotely using a web browser, dedicated software, or mobile apps. This remote access is a key advantage of NVRs, as it allows users to monitor their surveillance system from anywhere with an internet connection.

Scalability: NVR systems are highly scalable. Users can easily add more IP cameras to the network as needed, making them a flexible choice for expanding surveillance coverage.

In summary, DVRs and NVRs differ in their compatibility with camera types and how they handle video signals. DVRs are best suited for analog cameras and convert analog signals to digital for storage and playback. In contrast, NVRs work with IP cameras, which capture and transmit digital video directly over a network, offering more flexibility, scalability, and advanced remote access capabilities. Choosing between the two depends on the type of cameras you intend to use and your surveillance system requirements.