CCTV Surveillance, 2nd Edition 2006 Video Practices and by Herman Kruegle

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By Herman Kruegle

This revision of the vintage ebook on CCTV expertise, CCTV Surveillance, presents a entire exam of CCTV, protecting the functions of varied platforms, the way to layout and set up a process, and the way to decide on the fitting undefined. taking into consideration the ever-changing advances in know-how utilizing electronic options and the web, CCTV Surveillance, moment version, is totally up to date with the new developments in electronic cameras and electronic recorders, distant tracking through the web, and CCTV integration with different protection platforms. carrying on with within the celebrated culture of the 1st variation, the second one version is written to function an invaluable source for the end-user in addition to the technical practitioner. each one bankruptcy starts off with an summary, and provides the most recent info at the correct apparatus, describing the features, good points and alertness of every gadget. insurance of getting older or out of date know-how is lowered to a historic viewpoint, and 8 fresh chapters conceal electronic video know-how, multiplexers, built-in camera-lens-housing, clever domes, and swift deployment CCTV structures. * Serves as an essential source on CCTV thought* contains 8 new chapters at the use of electronic parts and different comparable applied sciences that experience noticeable a contemporary explosion in use * absolutely illustrated, the publication includes thoroughly up to date pictures and diagrams that characterize the most recent in CCTV know-how developments

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Digital video components use digital signal processing (DSP), digital video signal compression, digital transmission, recording and viewing. Figure 2-3 illustrates these devices and signal paths and the overall system block diagram for the digital video system. SITE 2 SITE 1 ANALOG CAMERA(S) ANALOG CAMERA(S) CAMERAS SERVER SERVER ROUTER RJ45 BNC KEYBOARD BNC RJ45 * KEYBOARD DIGITAL IP CAMERA(S) DIGITAL IP CAMERA(S) ROUTER INTERNET * INTRANET LOCAL AREA NETWORK (LAN) DOMES WIDE AREA NETWORK (WAN) WIRELESS (WiFi) * * COMPRESSED DIGITAL VIDEO (MJPEG, MPEG-2, MPEG-4).

6 The Recording Function For decades the VCR has been used to record monochrome and color video images. The real-time and TL VCR magnetic tape systems have been a reliable and efficient means for recording security scenes. Beginning in the mid-1990s the DVR was developed using a computer hard disk drive and digital electronics to provide video image recording. The availability of large memory disks (hundreds of megabytes) made these machines available for long duration security recording. Significant advantages of the DVR over the VCR are the high reliability of the disk as compared with the cassette tape, its ability to perform high speed searches (retrieval of images) anywhere on the disk, absence of image deterioration after many copies are made.

Depending on the application, manual or automatic-iris lenses are used. 67") FIGURE 2-6 Comparing the human eye to the video camera lens when it is too low, thereby maintaining the optimum illumination on the sensor at all times. Figure 2-7 shows representative samples of CCTV lenses, including FFL, varifocal, zoom, pinhole, and a large catadioptric lens for long range outdoor use (which combines both mirror and glass optical elements). Chapter 4 describes CCTV lens characteristics in detail. 3 The Camera Function The lens focuses the scene onto the camera image sensor which acts like the retina of the eye or the film in a photographic camera.

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