IP Networking and Its Impact on Video （IP网络视频和它的影响）.pdf

Whitepaper IP Networking and Its Impact on Video Surveillance Introduction Video surveillance is critical for business. Different organizations use video surveillance to protect people’s safety, protect valuable assets, or minimize risks associated with criminal activity. In the past, only larger companies could afford IP video surveillance. Now, the proliferation of IP networks and falling prices on IP video cameras are making these solutions an attractive option for many industry sectors, including retail shops, educational institutions, governments, and any business requiring security surveillance. One of the biggest trends in surveillance is the accelerating shift to IP from analog. With about 15 million surveillance cameras installed in the United States today, almost 10 percent are now IP based. The Evolution of Video Surveillance Systems Video surveillance, or CCTV (closed-circuit television), is a 30-year old industry that has seen its share of technological changes. Recently, the ever-lower cost of IP bandwidth and storage has made video capture and storage over IP networks faster, simpler, and more affordable. Now, markets such as K-12 schools, public libraries, hotels, and small factories or plants can implement comprehensive video surveillance. This next section explores the evolution of video surveillance systems as they move from strictly analog, to a hybrid of analog and digital, to digital networks. Analog CCTV Systems For the past 20 years, most monitoring and surveillance applications have used analog technology. Videocassette recorders (VCRs) recorded feeds from analog cameras (see Figure 1). The solution boasted a manageable price point and reasonable ease of use. However, analog systems are not without shortcomings. Analog CCTV systems generally offer no remote accessibility and are notoriously difficult to integrate with other systems. Analog systems are labor inten