DIGITAL CCTV A Security Professional’s Guide phần 4 pptx

... 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. 1 14 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

... TOKYO Butterworth-Heinemann is an imprint of Elsevier A Security Professional’s Guide 4 Digital CCTV are created when electrically charged particles, such as electrons, are made to move. As the charged particles ... 233 v a tape or a record. With all of the advancements available in digital technology, it is not as “perfect” as analog video and does present a variety o...

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

... 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

... 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

... 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 ... properties, 77–78 AM, see Amplitude modulation American National Standards Institute (ANSI), defi nition of standard, 76 Amplitude modulation (AM), principles, 45 46 AMPS, see Advanced Mo...

Ngày tải lên: 12/08/2014, 16:21

... 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- rate representation of the original ... transmission is coaxial cable with a characteristic impedance of 75 Ohms (Ω). An RG-59 type coaxial cable, about 1 / 4 inch in diameter, can carry a video signal of one volt peak-to-peak...

Ngày tải lên: 27/06/2014, 11:20

... setTimestamp(int parameterIndex, java.sql.Timestamp aTS, java.util.Calendar Cal)—Sets a parameter to a java.sql.Timestamp value. void setUnicodeStream(int parameterIndex, java.io.InputStream aStream, ... aClob)—Sets a CLOB parameter. void setDate(int parameterIndex, java.sql.Date ADate, java.util. Calendar Cal)—Sets a parameter to a java.sql.Date value. void setNull(int parameterInd...

Ngày tải lên: 13/08/2014, 12:21

... Updating data in a database • Deleting data from a database • Updating multiple tables Inserting data into a database You use SQL INSERT statement to write information to a database. A write adds ... (default) Warning Error Fatal Information var The name of a single variable that you want displayed. This attribute can specify a simple variable, such as a string, or a comple...

Ngày tải lên: 14/08/2014, 10:22