Analog Camera

Cameras on an modern analog CCTV system send their video in the traditional base band format over coax or UTP cabling back to a digital video recorder (DVR). Here, video is digitized and stored on hard drives. Most modern DVRs are a network device, and as such can be accessed remotely from the LAN, or with the proper configuration, from across a WAN or the internet. There are no tapes to change. Video is kept on hard drives, typically on a FIFO basis so there is always a rolling video archive of the past X days. So, despite the fact that video is being transmitted from the cameras in an analog format, live and recorded video is still available over the network.


IP Camera

IP video cameras broadcast their video as a digital stream over an IP network. Like an analog system, video is recorded on hard drives, but since the video is an IP stream straight from the camera, there is more flexibility as to how and where that video is recorded. The DVR is replaced with an NVR (network video recorder), which in some cases is just software since it doesn't need to convert analog to digital. Video footage can then be stored on new or existing network RAID drives as directed by the NVR software.


Standalone Digital Video Recorder

As the name suggests, a stand-alone DVR, also known as Non-PC-based Digital Video Recorder refers to a Recorder that includes multiple components and facilities into a single box. This box can include different boards, power supply sources, central processing unit (CPU) and other DVR-related services. In general a standalone DVR is a hardware solution designed to record video in a digital format to a disk drive (similar to those used in personal computers), SD memory cards, USB flash drives or other local or networked mass storage devices. In common words, your DVR is a hard drive put inside a fancy, pretty box with several buttons and capable to provide you with two main tasks: record and replay video from your television set. Modern standalone DVRs are easy-to-use, high reliable devices. As in any simple and easy-to-operate device all settings and control are provided by buttons or remote control unit (like for your TV-set).
The main advantage of the Standalone or Non-PC based DVRs is – such recorders use embedded hardware for compression and operation. If the DVR’s hard drive should fail, the worst that could happen would be the loss of stored video. The DVR’s operating system is stored in the hardware, not on the hard drives (embedded within the IC chip) - it is a permanent feature that can’t be tampered or modified in any way, besides, as the standalone DVRs cannot be windows based – they are far less vulnerable to viruses and hackers attacks. Standalone DVRs is less expensive.


Network Video Recorder

A network video recorder (NVR) is a software program that records video in a digital format to a disk drive, USB flash drive, SD memory card or other mass storage device. An NVR contains no dedicated video capture hardware. However, the software is typically run on a dedicated device, usually with an embedded operating system. Alternatively, to help support increased functionality and serviceability, standard Linux and Windows operating systems are used with standard Intel processors and video management software. An NVR is typically deployed in an IP video surveillance system.

Network video recorders are distinct from digital video recorders (DVR) as their input is from a network rather than a direct connection to a video capture card or tuner. Video on a DVR is encoded and processed at the DVR, while video on an NVR is encoded and processed at the camera, then streamed to the NVR for storage or remote viewing.

Hybrid NVR/DVR security systems exist which incorporate functions of both NVR and DVR; these are considered a form of NVR

NVR home security systems are wireless (there are also wired systems), tend to be easy to set up, can be accessed through a web browser, and allow the user to be notified by email if an alarm is triggered.


Access Control Systems with Hooter

The Hooter Security Alarm System, offered by us, is suitable for wide distance installation. Our Security Alarm System features high sensitivity and does not miss to ring when needed. We offer Security Alarm System with loud ringing noise that can be heard till long distance. Also our Security Alarm System comes with DSP chip and dynamic noise suppressing technology.

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