By Ben Pitt
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The #1 on-the-job tv and video engineering reference. it is a problem to stick in sync with the fast paced global of television and video this present day. Networking schemes, compression know-how, computing structures, gear, and criteria are all yet the various issues that appear to alter per thirty days. because the box transitions from analog to hybrid analog/digital to all-digital broadcast networks, stations, video video construction amenities, and success-minded engineers and technicians not sleep to hurry with the one reference monitoring all of the adjustments within the box: the "Standard instruction manual of Video and tv Engineering".
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The arriving of the electronic age has created the necessity to be ready to shop, deal with, and digitally use an ever-increasing quantity of video and audio fabric. therefore, video cataloguing has emerged as a demand of the days. Video Cataloguing: constitution Parsing and content material Extraction explains the way to successfully practice video constitution research in addition to extract the elemental semantic contents for video summarization, that is crucial for dealing with large-scale video info.
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There are many ways to transmit the video signal from the camera to the monitoring site. Figure 2-21 shows some examples of transmission cables. The signal can be analog or digital. The signal can be transmitted via electrical conductors using coaxial cable or UTP, by fiber optic, by LAN or WAN, intranet or Internet. Particular attention should be paid to transmission means when transmitting color video signals since the color signal is significantly more complex and susceptible to distortion than monochrome.
The digitized scene signal is transmitted to the digital display be it LCD, plasma, or other, and reproduced on the monitor screen pixel-bypixel providing a faithful representation of the original scene. 2 Digital and Progressive Scan The digital scanning is accomplished in either the 2-to-1 interlace mode as in the analog system, or in a progressive mode. In the progressive mode each line is scanned in linear sequence: line 1, then line 2, line 3, etc. Solidstate camera sensors and monitor displays can be manufactured with a variety of horizontal and vertical pixels formats.
However, when there is precipitation (rain, snow, or sleet, or when fog intervenes) or in dusty, smoky, or sand-blown environments, this attenuation might be substantial and must be considered. Likewise in hot climates thermal effects (heat waves) and humidity can cause severe attenuation and/or distortion of the scene. Complete attenuation of the reflected light from the scene (zero visibility) can occur, in which case no scene image is formed. Since most solid-state cameras operate in the visible and near-infrared wavelength region the general rule of thumb with respect to visibility is that if the human eye cannot see the scene neither can the camera.