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Video Surveillance System Devices

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Video Cassette Recording (VCR) Today, security camera system may consist of a variety of products and technologies. Many suppliers build pieces of the system, whether it is part of a hybrid analog / digital or implementation of end-to-end IP networking solutions. The following section describes the development of the CCTV system, starting with a fully analog system and adding components until it reaches the network capacity. A traditional analog surveillance system consists of analog cameras, time-lapse VCRs and monitors. A coaxial cable runs from each camera a multiplex device, which allows multiple cameras recording to a VCR, a monitor for display. Time-lapse VCR allows the operator to adjust the time so that the two-hour video recorder accommodate standard VHS tapes he can use much longer. Trade-off produces low-quality images with the advantage of less frequent tape changing or overwriting pictures. Analog CCTV systems have been the start of the monitoring and control during the last twenty years. This technique is very old and outdated and quickly by digital technology, which currently replaces more than 80% of all new installations. Digital Video Recording (DVR) DVR is a computer with a dedicated graphics card, analog video port on the camera via 75 ohm coaxial cable. This card also can change the analog signal into a digital signal and compress the image generated saved on the internal hard drive, displayed or transported in the network. DVRs typically uses a computer operating system like Windows or Linux along with the Video Management System (VMS) software. DVRs are controlled and stored, access via a keyboard, mouse and external monitor to setup, run the monitoring software and playback of video files. DVR usually has an internal Ethernet port for LAN or WAN system. Network-Attached Digital Video Recorder (NDVR) A network connected digital video recorder is part of the PC and the “Network Appliance” NDVR is very similar to the DVR and is sometimes called the “Network Appliance”, because it requires no keyboard or mouse connected Monitor. This unit will go directly to an Ethernet switch, and the only way to turn the device on the network. The device has an operating system, but live in the firmware on a single chip, burned on the motherboard. Depends largely on exhibit increased Video Management Software (VMS) on your PC network client loaded installed, but some have “embedded” in other motherboard chip, where it can be accessed from any PC via Internet browser. Most of these products locally have an internal hard drive for storing video files, but they can inter-arrays with Direct Attached Storage (DAS connected), Network Attached Storage (NAS) devices and Storage Area Networks (SAN) over a LAN or WAN . Network Video Recorder (NVR) “Pure” Network Video Recorder (NVR) is not the “turn-key” or a network device, but made with a combination of network devices. An NVR is a standard network server with internal storage or fastened together with recording software, video surveillance systems or communications software, and perhaps even intelligent analysis of video software. Digitization of analog video signals from a separate “done video encoder or video server,” which is also connected to the Ethernet / IP network. Using the Configuration NVR, IP cameras really could act directly as a server input video and pictures on the NVR NVR and video directly from the software. Video Encoder & Decoder encoder used to retrieve the video signal in analog or digital form and make it suitable for the transfer, where bandwidth or storage capacity to a problem. Encoding video surveillance system for many applications where digital recording device used or desired to see the whole network. The first analog signal into a digital format to be converted, but then, any source into a compressed video file smaller or “river” There are different standards for encoding / decoding and compression.; Each has advantages and disadvantages. Usually a compromise quality to reduce file size. Decoder is a device to do the opposite of an encoder, extract the code so that the original information can be retrieved. The same method is used to encode is usually just the reverse to decode. These are relatively simple device that can be a software program that runs on PCs, DVD players or even mobile phones. You can also take hardware, the digital video format and convert it back into an analog signal, which can be displayed on TV monitors. This video allows the network to be activated on the output device. Typically, decoding and encoding functions are on the same machine and is often referred to as a codec “, stands for Code decode /. Digital Network Migration to SolutionBecause gives it a significant financial investment in analog CCTV, Security Manager, many choose a gradual transition to IP analog, mixed and digital security technologies as possible during the migration. Integrate existing analog equipment with products that offer the functionality of the digital systems are several: Remote-effectivenessFlexibilityScalabilityIn accessibilityCost simple illustration below, the analog cameras connected to the analog video switcher, analog monitors, video recorders and video servers. This setup offers traditional sequential monitoring and recording of multiple analog cameras. By connecting a video server for converting analog data into digital video, photos can be sent over the network / IP Ethernet (through a router / switch) that an Ethernet port for IP network cameras provides . With this configuration, the security official at the local or remote location of analog and digital video view IPcameras network. In the transition from analog to digital surveillance systems, no system is too small or too closely associated with analogue technology, not by multiple sizes of digital technology is an advantage. Closing the Digital Network Migration Solution for your existing systems can be made accordingly, and still add the ability to create new software and hardware. Some of the latest security software in the monitoring system is a dual sensor as shown below in detail. New camera system will combanation network cameras and high-end camera analogy.

The author of this is the managing director of sse installations Sydney Australia. Please visit us at sse installations for more details.

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