security camera box video surveillance system devices -

by:Hanway     2019-08-16
Nowadays, the security camera system may consist of many different products and technologies.Whether it's part of a hybrid simulation/digital implementation or part of a final implementation, many vendors have built the systemto-End-to-end networking IP solutions.The following sections explain the development of CCTV systems, starting with a full simulation system, adding components until networking capabilities are achieved.The traditional analog monitoring system consists of analog cameras,VCRs and display fail.The coaxial cable extends from each camera to a multiplexing device that allows multiple cameras to be recorded on one VCR with a monitor for viewing.The time-The delay video recorder allows the operator to record the video recorder when adjusting, such a standardHe can use the VHS tape for an hour.The trade-In the lower resultsHigh quality images in return for less frequent tape changes or image coverage.Over the past 20 years, analog CCTV recording systems have been the basis for monitoring and monitoring.This technology is very old and outdated and is rapidly being replaced by digital recording technology, which now accounts for more than 80% of all new installations.Digital video recording (DVR) DVR is a computer with a special video graphics card, via 75-Ohm coaxial cable.The card also converts the analog signal to a digital signal and compresses the resulting image in order to store it on an internal hard drive and view or transmit it over the network.DVRs typically use computer operating systems such as Windows or Linux, as well as video management system (VMS) software.Control and access the dvr through the keyboard, mouse and external display in order to set up, run the monitoring software and replay the stored video.DVRs typically have an internal Ethernet connection for LAN or WAN attachments.Network-Network A with digital video recorder (NDVR-The additional digital video recorder is part of the PC and the "network device. The NDVR is very similar to the DVR and is sometimes called a "network device" because it does not require-The keyboard, mouse, or video monitor that is connected.The device is plugged directly into the Ethernet Switch and the only way to access the device is through the network.The device still has an operating system, but it resides in the firmware where the chip is burned on the motherboard.Most of these NDVRs depend on video management software (VMS) loaded on the network)However, some connected client PC "embed" it in another motherboard chip where it can be accessed from any PC via an internet browser.Most of these products have internal hard drives for local video file storage, but they can be connected to each otherConnect via LAN or WAN to a directly connected storage array (DAS), a network-connected storage (NAS) device, or a storage area network (san.Network video recorder (NVR) "pure" network video recorder (NVR) is not "turning"Key box \ "or network device, but created using a combination of network devices.NVR can be a standard network server with internal or additional storage capabilities, recording software, video surveillance systems or communication software, or even intelligent video analysis software.The digitization of analog video is done by a separate "Video Encoder" or "video server" that is also connected to an Ethernet/IP network.With the NVR configuration, a real IP camera can act as a video server, input images directly to the NVR, and be managed directly by the NVR video software.Video encoders and decoders are used to receive video signals in analog or digital form and make them suitable for transmission with problematic bandwidth or storage capacity.Coding is suitable for many video surveillance system applications where digital recording devices are required or viewed over the network.The analog signal must first be converted into a digital format, and then each source must be compressed into a smaller file or video stream.\ "There are several criteria for encoding/decoding and compression;Have advantages and disadvantages.Typical tradeFor Reduced file size, closing is quality.A decoder is a device that is the opposite of an encoder and uncodes in order to retrieve the original information.The same method used for encoding is usually reversed just for decoding.These are still relatively simple devices, which can be software programs running on PC, DVD player and even mobile phones.They may also be hardware devices that take digital video format and convert it back to analog signals that can be displayed on TV monitors.This allows network video to be switched on any output device.Usually the decoding and coding functions are located in the same device, often referred to as the "codec", which is the initial acronym word for code/decoding.Migration to digital network solutions due to the large amount of financial investment in analog CCTV, many security managers choose to transition to IP in stages and integrate simulation and digital security technologies as much as possible during migration.

In the simple illustration below, the analog camera is connected to the analog video switcher, analog monitor, VCR, and video server.This traditional setup provides sequential monitoring and recording of multiple analog cameras.By connecting a video server to convert analog video to digital data, images can be sent over an Ethernet/IP Network (via a router/switch) that provides an Ethernet connection for networked IP cameras.With this configuration, authorized security personnel at local or remote locations can view videos from analog and digital networked IPcameras.
In the transition from a analog monitoring system to a digital monitoring system, no system is too small or too tightly connected to analog technology to benefit from some kind of digital technology.In summary, digital network solutions can be migrated to existing analog systems, and the latest software and hardware can still be added.
Some of the latest dual sensors in the security monitoring system software are listed in more detail below.The latest camera system will be a combination of a network camera and a high-end analog camera.
Custom message