Axis technical guide to network video
120Pages

Technical guide to network video. Technologies and factors to consider for the successful deployment of IP-based security surveillance and remote monitoring applications.

2 Welcome to the Axis technical guide to network video The move to open video systems—combined with the benefits of networking, digital imaging, and camera intelligence—constitutes a far more effective means of security surveillance and remote monitoring than has ever been reached before. Network video provides everything that analog video offers, plus a wide range of innovative functions and features that are only possible with digital technology. Before setting up your own system, you need to consider what features are required. It is equally important to consider factors such as...

Network video: overview, benefits and applications 7 1.1 Overview of a network video system 7 2.1 What is a network camera? 15 2.2 Types of network cameras 16 2.2.1 Fixed network cameras 17 2.2.2 Fixed dome network cameras 17 2.2.3 PTZ cameras and PTZ dome cameras 18 2.3 Day and night network cameras 21 2.4 Megapixel network cameras 23 2.5 Guidelines for selecting a network camera 24 3.2.2 Matching lens and sensor 30 3.2.3 Lens mount standards 31 3.2.5 Manual or automatic iris 32 3.4 Image scanning techniques 35 3.5.3 Wide dynamic range 37 3.6 Installing a network camera 38

Camera protection and housings 39 4.1 Camera enclosures in general 39 4.3 Positioning a fixed camera in a housing 40 4.5 Vandal and tampering protection 41 5.1 What is a video encoder? 45 5.1.1 Video encoder components and considerations 46 5.1.2 Event management and intelligent video 47 5.2 Standalone video encoders 47 5.3 Rack-mounted video encoders 48 5.4 Video encoders with PTZ cameras and PTZ domes 48 6.4 High-definition television (HDTV) resolutions 54 7.1.2 Image compression vs. video compression 56 7.3 Variable and constant bit rates 61 8.2 Audio support and equipment 64

8.4 Audio detection alarm 66 8.6 Audio and video synchronization 67 9.1 Local area network and Ethernet 69 9.1.1 Types of Ethernet networks 70 9.1.3 Power over Ethernet 73 9.2.2 Data transport protocols for network video 80 9.5.1 Username and password authentication 84 9.5.5 VPN (Virtual Private Network) 85 10.2.1 WEP (Wired Equivalent Privacy) 89 10.2.2 WPA/WPA2 (WiFi Protected Access) 89 Video management systems 91 11.2.2 Windows client-based software 93 11.2.4 Scalability of video management software 94 11.2.5 Open vs. vendor-specific software 94 11.3.5 Event management and intelligent...

11.4.1 Application programming interface 104 11.4.5 Industrial control systems 106 Bandwidth and storage considerations 107 12.1 Bandwidth and storage calculations 107 12.1.2 Calculating storage needs 108

Network video: overview, benefits and applications - CHAPTER 1 7 Network video: overview, benefits and applications Network video, like many other kinds of communications such as e-mail, web services and computer telephony, is conducted over wired or wireless IP (Internet Protocol) networks. Digital video and audio streams, as well as other data, are communicated over the same network infrastructure. Network video provides users, particularly in the security surveillance industry, with many advantages over traditional analog CCTV (closed-circuit television) systems. This chapter provides an...

8 CHAPTER 1 - Network video: overview, benefits and applications Axis network cameras Home Office I/O AUDIO 1 2 3 4 5 6 OUT IN Axis video encoders PS1 NETWORK PS2 ACTIVITY 1 2 3 4 0 - FANS LOOP IP NETWORK INTERNET Web browser Power-one FNP 30 100-240 AC 50-50 Hz 4-2 A AC 0 - Power-one FNP 30 AXIS Q7900 Rack 100-240 50-50 Hz 4-2 A AC POWER POWER AXIS Q7406 Video Encoder Blade AXIS Q7406 Video Encoder Blade Analog cameras Computer with web browser Computer with video management software Figure 1.1a A network video system comprises many different components, such as network cameras, video...

Network video: overview, benefits and applications - CHAPTER 1 9 location to view and manage video, and off-site video access would not be possible without such equipment as a video encoder or a network digital video recorder (DVR). A DVR is the digital replacement for the video cassette recorder. > High image quality: In a video surveillance application, high image quality is essential to be able to clearly capture an incident in progress and identify persons or objects involved. With progressive scan and megapixel technologies, a network camera can deliver better image quality and higher...

10 CHAPTER 1 - NETWORK VIDEO: OVERVIEW, BENEFITS AND APPLICATIONS [•Tin Diiir^nrbnrTri^rpi] lirnl lTpi> ivtup HXK JJ5f B Hrrmri Can>n Wui... £~|f) |R| Figure 1.2a Setting up an event trigger using a network camera's user interface. Event management functionalities can be configured using the network video product's user interface or a video management software program. Users can define the alarms or events by setting the type of triggers to be used and when. Responses can also be configured (e.g., recording to one or multiple sites, whether local and/or off-site for security purposes;...

Network video: overview, benefits and applications - CHAPTER 1 11 viewing/recording station. Separate audio cables must also be used if audio is required. Network video products can also be placed and networked from virtually any location, and the system can be as open or as closed as desired. > Cost-effectiveness: An IP-Surveillance system typically has a lower total cost of ownership than a traditional analog CCTV system. An IP network infrastructure is often already in place and used for other applications within an organization, so a network video application can piggyback off the...

12 CHAPTER 1 - Network video: overview, benefits and applications 1.3 Applications Network video can be used in an almost unlimited number of applications; however, most of its uses fall under security surveillance or remote monitoring of people, places, property and operations. The following are some typical application possibilities in key industry segments. 1.3.1 Retail Network video systems in retail stores can significantly reduce theft, improve staff security and optimize store management. A major benefit of network video is that it can be integrated with a store’s EAS (electronic...