Dlvs Ping An City Application Network Video Monitoring System Solution

I. Project Overview

The establishment of a provincial-level city video surveillance system, divided into secondary monitoring centers, a total of 1500 heads, the establishment of such a large-scale video surveillance system, which method is required? The following three system functions of video monitoring are compared.

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Network Monitoring is an inevitable trend of technological development and a new management tool to improve work efficiency.

A provincial-level cross-region network video monitoring system can be established to integrate independent monitoring systems in different regions and levels to achieve access and control of the lower-level monitoring system by the higher-level monitoring system, and supports multi-level access. The system not only meets the conventional video frequency monitoring services of various monitoring systems, but also allows access to lower-level monitoring systems, which completely breaks the regional boundaries of the control area and the number of equipment extensions, it is particularly suitable for a wide range of applications, distributed monitoring and centralized management.

Ii. System Solution

System Network Environment

The city network video monitoring system is a comprehensive monitoring and management platform that is fully based on the TCP/IP network platform for Video Monitoring and alarms. A m private network is built for the Provincial and Municipal backbone networks. Each frontend provides 2 m optical fiber access.
The overall architecture of the system. Each regional center is connected through a quality assurance line (with a certain bandwidth allocated), which is the device of the monitoring center. Each regional center can be built and developed independently. Theoretically, the regional center can be set up at no limit. The cascade of regional centers can meet the needs of developing cross-region users. In principle, users and user devices are encouraged to be managed nearby, and video and audio data are also stored nearby. This helps to improve customer service quality and provide effective bandwidth usage and bandwidth management.

System network composition

The entire network video monitoring system consists of a total center, a sub-center, and a monitoring front-end. The system can be divided into two management layers (a total center and a sub-center), where users can be distributed in any part of the network.

Technical Implementation

2.1 Monitoring Center:

The system consists of a central management server, a network management workstation, a storage server, a network video decoder, and a large screen display system. A unified database server can be set up in a regional center. Each management server is directly connected to this database. Of course, you can also directly set up database services on various management servers. A storage network server group composed of disk arrays is set up in the region center to provide users with central media storage service functions. You can allocate a certain amount of storage space to each customer's Management Server as needed. You can also select a front-end device with local storage.

2.2 monitoring front-end

Install the corresponding monitoring cameras (color or black/white, fixed or movable cloud platform, fixed focus or zoom) and software systems on each monitoring site according to the specific circumstances of each city. One or more surveillance cameras can be installed in each public place, and one cloud platform, protective cover, and cloud platform controller can be installed in each peripheral area. Each video collection point matches a video encoder. Surveillance cameras are used to collect video signals in public places in cities. The cloud platform can be controlled by a computer in the control center.

This is the most important part to ensure the quality of the entire system. The video encoder is responsible for converting the analog video signal of the camera into a digital signal and compressing it at the same time. In addition, it also transmits control signals. The video encoder has a built-in 10/100 M Nic and is connected to a wireless device through a network cable, the monitoring information after encoding compression is collected to the monitoring management center through a wireless network. The monitoring center can view the real-time status of the monitored point, monitoring personnel can remotely view video images and remotely control the cloud platform in real time through the LAN of the monitoring center or the Internet.

Monitoring front-end-dlvs Network Video Server

The Network-Based Distributed Video access and multi-level distributed client/server architecture are implemented based on the characteristics of the broadband IP network system and video monitoring service requirements.

Network-based Distributed Video access means that a dedicated video access device is used to connect the monitored video to the network. The Network Video Server is used to simulate digital conversion of the camera signal, encode the data stream, and transmit it over the network.

The multi-level Distributed Client/Server Architecture sets up a multi-level video server in the master center and sub-center to schedule and manage requests of all levels of users. Video Monitoring Terminals at all levels only need to connect to the video server of the current level through the network, and obtain the required video stream through the video allocation server, which can avoid network congestion caused by the increase of video traffic, it ensures the operation security of the entire network system and facilitates the shared access and distributed management of monitoring videos by various business departments.

Our self-developed network video server with proprietary intellectual property rights is a professional distributed monitoring product based on real-time embedded operating system, using a high-performance video DSP processor, high coding efficiency, high image quality. Users on the network can directly use a browser or other dedicated support software to observe the remote camera image, and set, operate, and control the cloud platform and lens of the video server over the network.

Video Terminal

You can configure the number of decoders at the output end based on the actual number of TV wall display units. Each network video Receiving Terminal decodes and outputs the network video signal, and sends the video signal to a specified TV wall display unit or a large screen system. The Network Video Decoder can receive connection commands sent by the network video allocation server at any time to decode the specified video signal. The company now has three decoders: dlvs111d, dlvs241d, and dlvs282d, which can be decoded at the resolution of 1, 4, 8 4cif, 2cif, hcif, and CIF in real time.

Iii. Summary

The establishment of "Safe City" has a wide coverage and a huge project. Make rational use of existing network resources to establish a cross-region network video monitoring system, which completely breaks the regional boundaries of the control area and the number of device extensions, and integrates independent monitoring systems in different regions and layers.

A dedicated video access device network video server is used to connect the monitored video to the nearest network. Video Monitoring Terminals at all levels only need to connect to the video server through the network and obtain the required video stream through the video allocation server. Users at all levels in the network can manage permissions in a unified manner. The multi-user priority management mechanism is introduced to avoid control conflicts and ensure the uniqueness of control at various monitoring sites. Distributed Storage Based on IP networks makes massive storage possible and can meet the sharing needs of multiple users. Video Stream data, under the unified scheduling and management of Video Servers at all levels, sends video streams from video access terminals step by step. The local video monitoring terminal can apply for images permitted by the permission by logging on to the local video server. If the connection is interrupted between different levels of configuration, the video server at the upper level can skip the disconnected video server and the next level of video server connection. To fully ensure the bandwidth of each monitoring site, the MPEG4 encoding standard is adopted, and the bandwidth usage is low. It can realize high-quality image transmission and storage, and the transmission distance is far away, which is suitable for monitoring in a wide city.

To sum up, the Network Video Server and decoder are used to form an IP monitoring network based on existing network facilities, saving time, effort, and security.