Safe city pace wireless streaming media technology (1)

With the rapid development of the economy, the growing complexity of social order situation, various types of emergencies, and order in cases of criminal cases, and the accident occurred from time to time, large meetings and important security tasks very heavy.

In September 2005, the Chinese Ministry of public security official launch urban alarm and monitoring system (3111) throughout the province, city, and county levels alarm and monitoring system-building, promoting the construction of the "safe city". At present all the major cities such as Beijing, Guangzhou, Shenzhen, Hangzhou has begun to accelerate the construction of urban video surveillance system. Shanghai Municipal Public Security Bureau police on patrol and officers of wireless communications equipment configuration, relying on a/wireless communication, image communication, GPS patrol, van automatic positioning, GIS geographic information, computer-aided decision making system and computer network platforms, further enhance the command center of emergency response, social interaction, dispatching and decision-making ability.

1. wireless streaming media monitoring technology overview

Wireless multimedia streaming media network monitoring and management platform set wireless communications, streaming media, video processing, computer networks and automation technology, is video, audio, data and graphic integration solution.

Both network video surveillance, video conferencing, video, broadcast, and other functions that have the super large-scale networking capabilities for wireless monitoring system in public security industry provides technical support for all kinds of emergencies and contingency event provides good preparation, vehicle monitoring, public transport (bus, subway, bus, etc.), monitoring, and so difficult to monitor. Wireless networks, and streaming media business is primarily intended for GPRS/EDGE, CDMA, providing higher 3G bandwidth (100kbit/s or more) of wireless packet network. 3 g network air interface bandwidth increase to streaming media business to provide a good foundation, unifies wireless system is not affected by time and location constraints make mobile streaming media service more attractive. Video encoder and adaptive high-performance streaming media server devices makes the image definition reached FullD1 (DVD) effects, real-time performance, ease of use, you can directly through the Web for remote monitoring and remote management, providing users with a flexible choice, electronics monitoring picture maps, making full use of Firewall/VPN, encryption, rights management, security, authentication, real time clock technology to guarantee surveillance system and video materials are not ultra vires the use and destruction.

In urban security networking system, because the front-end device and backbone network bandwidth restrictions, massive user concurrency video resources easily generate network congestion.

In large-scale networking monitoring system using streaming media distribution technology, relying on distributed streaming server clusters to achieve sound/video stream of tiered forwarding, radically avoid massive concurrent flow generated by the network bottleneck; a single streaming media server bandwidth around 1000M in 100M «, you can meet thousands of road users in the on-demand request (per road 384kbps calculation). This front-end devices only need to send a copy of the data to the streaming media server, the streaming media server buffer forwarded, clients are unified to connect to the streaming media server for video data, the actual realization of multiple concurrent access of the user, saving precious bandwidth and front-end devices. Although the streaming media server is a distributed management, but all the user's authorization is centralized management, thereby ensuring service continuity and security of your business data.

2. wireless streaming media monitoring system of related technology

CDMA wireless streaming media monitoring system is a streaming media codec, embedded and CDMA1X network communication technology and other high-tech integration product that combines traditional monitoring, wireless networks, dynamic tracking, mobile VOD technology, for all kinds of complicated environment, important regional or remote locations daily, emergency monitoring and control provides superior surveillance applications.

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