In the rapidly evolving information age, the degree of building intelligence has gradually increased with the development of science and technology. Today's video surveillance systems with ever-increasing levels of networking are more powerful for building smart buildings. It not only facilitates the docking of various subsystems of intelligent buildings, but also provides remote real-time monitoring of buildings in multiple locations, which greatly reduces the personnel redundancy in the previous building management. At the same time, the use of high-definition network video surveillance systems for intelligent building monitoring systems is becoming more and more popular. The HD network video surveillance system is characterized by high image quality, accuracy, real-time, and rich information content. As an integrated system with strong prevention capabilities, it provides both the management of building environment security and the integration of intelligent building systems. Technical Support.
How intelligent building HD network system is set up in actual projects, and what functions are provided, the following analysis will be based on the Hua Antai HD network overall solution adopted by IWC Shanghai Data Center as an example:
I. Project requirements and system composition
IWC's data center in Shanghai is different from the ordinary building community. It requires efficient infrastructure management, lower operating costs, and improved data center availability. Therefore, the project has a total of two sets of monitoring systems, one for security monitoring, and a 24-hour full-scale blind spot monitoring of buildings, stairways, elevator halls, elevator cars, and perimeters; Monitoring, mainly for 24-hour all-round monitoring of key infrastructure such as transformers, UPS, battery packs, generators, precision air conditioners, temperature and humidity, water leakage, and new air units. The front ends of the two systems use HD 720P/1.3 million pixel HD network cameras. The back end uses the advanced and flexible Hua Antai E-NVR embedded network monitoring and management platform to manage the storage and forwarding, and then through the way of high-definition video decoding server on the TV wall display. . In order to facilitate later management, the system software sets the system to a large-scale network video surveillance system consisting of general control and sub-control. Both systems can operate independently and can be managed together. The following is the overall system architecture diagram:
In the system design of the monitoring center, it has set up a set of high-definition video walls composed of 69 46-inch ultra-narrow side splicing screens and 19 high-definition decoding servers to achieve the functions of browsing, roving, and combining arbitrary screens. Among them, Hua Antai HAT-DID4600HD LCD splicing screen, using the original dynamic super resolution technology, can make low-pixel images in the full HD display clear reproduction, high-definition images are more clear; the splicing screen ultra-narrow splicing seam is less than 6.7mm With a single-screen multi-channel signal, the entire screen signal and any combination of display. In cooperation with Hua Antai HD decoding server, it can perform VGA signal output, and achieve up to 9 screen HD image decoding and split output (in single VGA output), and can also realize two VGA port outputs and 5 screens per VGA port. HD image decoding split output. At the same time, with the cooperation of the front-end acquisition sensing layer, the entire monitoring center can truly achieve high-definition monitoring images. The front-end acquisition sensing layer consists of 720P, 1080P Huaantai million HD network high-speed dome cameras, Huaan Tai million HD infrared network cameras, and Huaan Tai million HD network gun cameras. They are all encoded using standard H.264 compression and support dual stream. Users can select different video streams for transmission, storage and browsing as needed. In addition, Huaan Tai million network HD cameras can provide SDK development kits for secondary development and achieve more features. And all the front-end million HD network cameras can adapt to a variety of network environments to transmit high-quality images, such as LAN, WIFI, 3G and so on. In the alarm function, front-end million HD network cameras can support a variety of alarm linkage, including sound and light alarms, information prompts, automatic video capture, Email sending functions.
Second, the system platform features
Hua Antai embedded center service platform contains three functional modules: access service module, forwarding service module and video service module. The access service is responsible for the registration access and signaling control of users and devices in the entire domain system. The forwarding service is responsible for handling the distribution of streaming media load. The video recording service is responsible for the central network storage and on-demand service of the front-end video. Hua Antai video surveillance system with its unique design, has the following features.
Dual stream function
Dual-stream is used to solve the problem that the bit rate can only be set according to the minimum requirement when the network bandwidth is different due to different storage and different users accessing the network video. Hua Antai's digital products support dual-streaming of front-end equipment and dual-streaming at the center platform. Can adapt to the needs of different network environments for video browsing and storage. Users can select high-definition picture quality or low bit rate in real-time browsing or storage according to their own needs. Both methods can be used at the same time. Which method is selected depends on the network bandwidth and storage capacity, and users can be more flexible. System management.
Disk Management
Hua Antai embedded platform server can use RAID to do hard disk management (16-bit), a single machine can support up to 16 SATA hard drives, and has a hot spare function, while damage to two hard drives, data will not be lost.
Client functionality
Hua Antai embedded platform client mainly has two types: management client, enterprise client.
The management client is the central configuration management module of the entire embedded platform system, which is used by the system administrator and is responsible for operations such as organization division of the entire system platform, device configuration, forwarding load, center recording, user authority, and virtual alarm zone management. The enterprise client software is the ultimate operating software for the system to deliver users, and is the main platform for the display of the entire system function. It is the software most frequently used by users. The entire software includes several major modules such as real-time monitoring, video playback, video wall switching, alarm and electronic map management. The real-time monitoring includes: system login, video browsing, cloud mirror control, parameter management, voice call, I/O control Wait for a number of business functions. Through the management of user rights, the platform will authorize the functions of each user. According to different requirements, the platform will give customers different levels of function authorization (such as PTZ control, video query, device management, etc.).
Hua Antai embedded video system client browsing software can achieve unified monitoring and management of front-end equipment, including basic business configuration, equipment management, audio and video live browsing, on-demand playback, round-robin switching, cloud mirror control and alarm display. The E-NVR can provide video-on-demand for WEB client access. The E-NVR can convert the video files stored in the E-NVR into a stream format to facilitate on-demand access for local and remote public network users. The E-NVR is mapped to the public network through a router and is authorized for remote management or image viewing.
Digital Matrix Function
E-NVR system high-definition decoding server can realize E-NVR system decoding output control via client and professional keyboard, mouse or WEB. The host supports single-channel 9-picture 720P decoding or two-channel 4-picture 720P decoding. The control methods include point-to-point switching, group switching, group switching, and plan switching so as to realize the functions of the digital matrix.
TV wall management function
The traditional analog surveillance system can only realize the function of the video wall in a small range, and cannot be monitored remotely, and the number of video walls is limited by the capacity of the matrix.
The E-NVR decodes the video stream through the decoder and displays it on the wall. It can implement video wall functions such as single-channel video switching, tour switching, group switching, and dome control. An E-NVR system can remotely manage multiple video walls. The number of video walls can be expanded without limitation by extending the network bandwidth and the decoding server, and remote remote control can be easily realized.
Ball machine 3D positioning function
When an emergency occurs, if the network has a delay, and the dome is rotated and the lens is zoomed for positioning, it becomes extremely difficult. In order to avoid the control and positioning problem caused by network delay, by combining the characteristics of Huaan Tai million HD network high-speed ball, it can realize the fast positioning function of 3D virtual frame zooming through the mouse to ensure accurate and rapid lens control of the PTZ camera;
digital map
The alarm electronic map as a function module of the enterprise client can be invoked via the toolbar shortcut button [electronic map], as shown in the following figure:
When an alarm occurs, the system will perform corresponding alarm linkage processing, such as the pop-up video window, sound, PTZ prefabricated bit call, and so on.
Remote parameter setting, program upgrade
Hua Antai client can query the front-end equipment (such as coding parameters, PTZ settings, display parameters, version information, etc.), and modify it. When there is a program update, the device can be remotely upgraded.
Third, solution characteristics
The overall high-definition network solution has the following features in terms of technology: First, the advanced encoding format. HD network products use H.264 video coding standard. H.264 is proposed by Joint Video Team (JVT) composed of ITU-T Video Coding Expert Group (VCEG) and ISO/IEC Motion Picture Experts Group (MPEG). Highly compressed digital video codec standard. The compression efficiency under the same image quality is more than 2 times higher than the previous compression standard. It can achieve high compression ratio, low bit rate, high quality images, strong fault tolerance, and good network adaptability. The biggest advantage of H.264 is that it has a very high data compression ratio. Under the same image quality conditions, the compression ratio of H.264 is 1.5 to 2 times that of MPEG-4. And can compress the original video file size to 1/102 of the original, and the large compression ratio of H.264 is based on the condition of low code rate, which achieves 720p, 1080i/p high-definition while reducing the transmission bandwidth. Video resolution. Second, storage security, simple expansion, system stability. Hua Antai E-NVR embedded network video management platform integrates an embedded server, embedded center management software, and a large-capacity disk array. It simplifies the system construction process and supports the expansion of mass storage capacity. At the same time, in order to ensure the security of large amounts of transmitted data, E-NVR disks support multiple RAID modes and hot backup functions. For example, RAID 5 can support the redundancy of one hard disk. In addition, the entire system will be equipped with an E-NVR mainframe and backup machine, and the two are linked by heartbeat lines to provide double data security. The entire operating system adopts the LINUX operating system to prevent the system from being paralyzed due to external attacks. Third, the platform provides SDK interface to facilitate the system's secondary development and upgrade management. Fourth, high-definition decoding, to ensure that the decoding display effect, such as on-site, so that the true meaning of network HD, Hua Antai HD decoding server supports VGA and HDMI port output, the decoding way to support at least all the way 1080P, 3-way 720P.
Conclusion:
Hua Antai Intelligent Building Million HD Network Solution has now been favored by more and more users. Up to now, Hua Antai's HD products and solutions have been applied in more than 60 projects of different sizes in the country. In the future, Hua Antai will continue to meet the high-definition demands of more industries through continuous development. At the same time, Hua Antai promoted the development of industry technology on the basis of maximizing customer benefits. Under the objective environment of constantly changing demands in the security market, Hua Antai will uphold the corporate philosophy of contributing employees, contributing customers, and contributing to the society, and providing higher-quality products and services for the intelligent construction industry on the road to innovation.