DIGITAL CCTV A Security Professional’s Guide phần 7 doc

... the alarm location, assess the information, and take appropriate actions to alleviate the situation. Unnecessary calls to law enforcement are virtually eliminated. Another distinct advantage ... false alarm dilemma. False alarm fi nes can range from $20 to $250 or more. If false alarm fi nes are affecting a company’s profi tability, remote video alarm verifi cation can help dramatically r...

Ngày tải lên: 12/08/2014, 16:21

... Netherlands ● SAI—Standards Australia International ● SANZ—Standards Association of New Zealand, New Zealand ● NSF—Norges Standardiseringsforbund, Norway ● DS—Dansk Standard, Denmark The ... have changed are compressed and transmitted. 62 Digital CCTV 1. Vector quantization is a lossy compression that looks at an array of data and generalizes what it sees. Redundant data is comp...

Ngày tải lên: 12/08/2014, 16:21

... increase the amount of data that can be transferred over analog cellular systems. TDMA is also the access technique used in the European digital standard (GSM) and the Japanese digital standard, ... twisted-pair wire) ● 100BASE-FX (a two-strand optical fi ber cable) There is a vast scope of applications, and the various methods are mutating and evolving at a rapid pace. 132 Digi...

Ngày tải lên: 12/08/2014, 16:21

... Monterey, California can now access real-time pictures and data 212 Digital CCTV years, manufacturing plants have been automating their produc- tion facilities at an increasing rate, augmenting ... Encryption Standard Airports, security systems, 150–151 Algorithm, properties, 77 78 AM, see Amplitude modulation American National Standards Institute (ANSI), defi nition of standard,...

Ngày tải lên: 12/08/2014, 16:21

... Cataloging-in-Publication Data Harwood, Emily. Digital CCTV / Emily Harwood. p. cm. Includes bibliographical references and index. ISBN-13: 978 -0 -75 06 -77 45-5 (alk. paper) ISBN-10: 0 -75 06 -77 45 -7 (alk. paper) ... TOKYO Butterworth-Heinemann is an imprint of Elsevier A Security Professional’s Guide 4 Digital CCTV are created when electrically charged particles, s...

Ngày tải lên: 12/08/2014, 16:21

... what they all mean. This brings us around to the question “How digital is it?” It is possible to have analog cameras and monitors, use coaxial cable, and have a DVR, and call that a digital ... on a wavelet-based device from another manufacturer. 114 Digital CCTV a plastic jacket. See Figure 7- 1. It is used to transmit both analog and digital signals and has superior f...

Ngày tải lên: 12/08/2014, 16:21

... video data captured. A networked digital video management system is a perfect example of how to add camera “eyes” to an airport, or any facility, and automate the alarm triggers on the data captured ... footage from inside and outside, store operational data, and generally improve the quality and safety of public transportation. The Santa Clara Valley Transportation Authority (VTA) o...

Ngày tải lên: 12/08/2014, 16:21

... 384.55′6—dc22 20 070 04218 British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library ISBN 13: 978 -0 -75 06 -77 45-5 ISBN 10: 0 -75 06 -77 45 -7 For all information ... important to understand that you can convert an analog signal to representative numbers and then convert it back again to an analog signal that is an accu- rat...

Ngày tải lên: 27/06/2014, 11:20

... programmatically using the setValue method or the value property. - (void) setValue:(float) value animated:(BOOL) animated The minimum, maximum, and initial values are all properties that you can ... horizontal bar with a small round indicator that a user can move to the right or left to change the slider’s value. Figure 12-16 contains a slider example. Appearance The UISlider class h...

Ngày tải lên: 13/08/2014, 18:20

... reports each as a percent of the total. The computer handles data differently. It measures the voltage at a preset time interval and stores each displacement as a digital word, usually at a rate of ... than the inte- grator to store a single chromatogram, however, it can use this raw data to report tables of peak maxima, areas, and heights versus time and recalculate, redisplay, a...

Ngày tải lên: 05/08/2014, 11:20