Consumers should pay attention to IP-based now, if:
- You do not have the possibility to lay additional cables or you want to use existing cable networks (SCS);
- you want to legally without permission on the frequency wireless communication for the organization of the system;
- Your system is geographically distributed over a large area and you want to reduce the amount of cabling;
- In the building complex situation and there is no interference with the ability to pass on the signal cable from analog cameras;
- you need to remotely monitor with video recording at a considerable distance from the
- you need to reduce the probability of intercepting signals from surveillance cameras.
Despite the fact that the list of positive arguments IP-based selection was long, they have their disadvantages.In particular, you can not get uncompressed image and to view will have to decode it on your computer.In addition, you will be limited in their ability motion detection abilities of IP-video devices or detection of image compression.
What is the difference between IP-based cameras from analog?
IP-camera consists of a camera, a video converter, and a network client that transmits the digitized images to the network.To work with the IP-chambers, in the simplest case, using a simple computer located in the same network to view images from the camera.
to work with analog cameras or the DVR needs or a computer with installed system TSSVN (ADC board + special software).
The quality is superior to analog cameras IP, but this difference is less pronounced.For ease of installation and maintenance of IP-cameras, of course, come as to create a system you just need to connect the camera to an existing network (in the case of a wireless network is even easier).For analog cameras need to pull the cables (usually - a coaxial cable or twisted pair cables with video transmission equipment (SRRA)).
now generates more video data than ever before.As the amount of data effectively used?Like all these saved petabytes (thousands of terabytes) to classify and filter, and how to maintain a high level of video monitoring?Video analytics, also known as videointellekt, will play a leading role in answering these questions.
videointellekta primary goal is to provide better information and make it faster.It includes an analysis of scenarios in accordance with a set of rules for the identification and tracking of actions, objects or events.Such rules may cause the camera to observe the fall of man, detect suspicious baggage measured traffic control for perimeter intrusion detection, and even identify behavior that is different from normal.
Videointellekt can be applied at different levels of the system in real time, and to the registered data.
Traditionally, videointellektualnye system deployed centrally on servers, analyzing incoming or pre-recorded video.This approach, however, is poorly adapted to larger systems, since the capacity of the industrial server rarely exceeds eight video channels.Since the analytical algorithms become more complex - requires more CPU cycles - and the video resolution and frame rate increased more, the system requirements will outstrip current capacity servers.This limits the profitability and scalability of today's centralized videointellektualnyh systems.
The trend is clear: the network cameras can now directly decide the majority of video analysis tasks.And with a powerful videointellektom who invested in each network camera, the problem of scalability is now smaller and considerably cheaper processing.Such cameras also have the ability to directly analyze the accurate digital sensor data in the source, before they are distorted line interface and system delays.
concept intelligent network camera also reduces the bandwidth requirements, since the video data is not transmitted until such time as not required.Most of the time analytic application tells the camera to send only text metadata, such as counters, serial numbers, etc.With these developments will increase demand for open standardized system, because users need complete, integrated and effective network video solutions.In addition to the more advanced analytics, innovative and flexible digital formats allow videobrabatyvayuschey ability to accommodate more network cameras.
The most interesting scenes is usually the movement or other changes.Unlike traditional CCTV, intelligent network cameras can answer an increase in frame rate, shift registration to the local mode, the increase in resolution, etc.
Examples of products and their application
company Axis Communications (http://www.axis.com) produces video servers, DVR, network cameras and IP.In her project for the company Baylor Health Care System The system is configured so that the recording inside the room network management started by the signal sensor registered the doors to open.The notification e-mail message with the video (24 frames per second) is automatically sent to the director of network and network operations manager.
In another project, deployed in 70 offices, one of the largest French banks Caisse d'Epargne, involved 150 network cameras Axis 2100. Product 2100 combines network access device, e-mail client and the camcorder also includes a motion detector, FTP-and Web-based servers.Axis 2191 audio module adds to the picture sound (via Web-browser).The video image can be transmitted at up to 10 frames per second at a resolution of 320 * 240 pixels and a speed of 600 kbit / s.The recording subsystem Axis 2460 produces local recording video for remote playback.
good example of a hybrid, analog-to-digital solutions for video surveillance is a product of RemoteVU Guardian Vanguard MS, which are based on the Web camera controls like pan, tilt and zoom (Pan, Tilt, Zoom - PTZ), as well as access tomemory devices on hard disks.The product is not only a built-in Web-server and FTP-server that allows you to upload videos to authenticated users.
80 GB hard disk can be RemoteVU within two months to record the image QCIF (quarter-sized) with a single camera, transmitted with a frequency of 20-30 frames per second at a speed of 128 kbit / s.Increasing the image to full-screen size, you will again be able to two months to record images at 12-15 frames per second.With channel Ethernet, you can simultaneously transmit video images of him with eight cameras.
Tools SNMP-capable management to notify users RemoteVU Guardian on disconnecting the camera, or network interference.Controls software alarm and control outputs, which are accessed through a browser, allows you to close the gates and doors, turn on / off alarms.In addition, the API allows developers to embed the video output individually customizable Web-pages.
company Vanguard MS not only sells IP-surveillance equipment, but also evaluates, design and remote support networks for a number of vertical markets.For example, at airports, it uses the 5-GHz 802.11a wireless links to connect to a variety of products Guardian.In addition, the commitment to the idea of keeping the convergence of voice and data, Vanguard manufactures multiservice access devices.
good examples of companies whose products are used in the work of video analysis tools are Loronix (a division of Verint) and NICE.Attention developers
product line Loronix CCTVware was directed primarily at the intellectual ability to record video monitoring and alerting system - all sorts of triggers recording means of index search and output, data analysis.Loronix not let the end nodes cameras, but the device produces DVR, based on the operating system Windows NT, and software, video recorders confer passive "intelligence vigilance", which enables them to adequately respond to suspicious objects video.Its system digitizes, compresses, records and stores the video data received via the multiplexed video channels (up to 32 channels per recorder).It can simultaneously display live video, arriving at the 16 video inputs, and scan the specified area of the video live or recorded video to identify them in some kind of activity.The system is also able to check whether there was a change of the recorded data.In addition to the server write and read video, one of the system components Loronix CCTVware are based on PC workstations and tape libraries.
By integrating products Loronix with third-party security software, they can, for example, start recording whenever employees with special access tokens pass through the door.Large courier service uses the system Loronix visual tracking consignments with special bar codes when they pass through the sorting machine.POS terminals are also connected to the system CCTVware: retail organizations use the accumulated video data, which are derived in accordance with the time-stamped logs of exceptional events related to opening the cash drawer (it allows to identify and prosecute not clean the hands of employees).The system can even warn Loronix cashiers about the dangers threatening it, by any chance, "says" suspicious behavior, such as their movement in the wrong direction at a certain speed.To determine the nature of the movement, videointellekt products Loronix compares frames.This allows you to give the motion detection capabilities of all existing analog cameras, eliminating the need for additional infrared sensor modules.
most famous application products Loronix, became "nail" Web-conference of Cisco, dedicated IP-Surveillance systems have been deployed in the police station, the Seal Beach, California.The system provides video Loronix local banks with the police department (using wireless access points and bridges such as "point-point" of Cisco).The same system is planned to cover schools, hospitals and shops.In case of alarm the live video "pushed" to a processing center 911 telephone calls and answer calls the police, who are in police cars equipped with specialized PCs with touch screens and radio receivers / transmitters.When viewing the crime scene through the Web-browser in real-time use camera controls such as pan, tilt and zoom.Video information can be used even on foot cops, if they have a pocket PC.
company NICE Systems competes with Loronix in the field of management and video analysis and generation of warning messages on the results of such an analysis.Devices companies receive signals from the input and control interfaces of analog cameras via traditional analog switching matrix.According to the manager of Aaron Chesler, it's not just the fact that security officers are accustomed to these tools, but also in the fact that the vast majority of this current-day video surveillance products are analog.In addition, during 2003, the company had planned to release their systems for IP-cameras.
Normally, Chesler said before to send guards to the scene, the administrator pays attention to any suspicious movement or event which is fixed on the monitors.Through the use of systems of NICE, he could not get up from the table, to conduct a preliminary investigation, using the browser and its own controls PTZ.Means of image analysis systems allow NICE to see the presence of moving objects video recorded on a CD with specific cameras and at certain times.The algorithms of the system can even detect objects left unattended for a long time.
product NICEVision Pro - is DVR-device / server of NICE.It is equipped with a maximum of 96 inputs for connecting video cameras and have additional capabilities of recording / monitoring audio.Smaller product NICE - Harmony, can operate either independently, or as part of NICEVision Pro.It is capable of recording video information that comes to 64 inputs for connecting cameras at 4 fps.