CCTV systems

In the recent years, people are really concerned about theft as the burglars are increasing everyday and causing harm both to public places and your own home. With the introduction of CCTV systems criminal activities can be prevented to a great extent. The CCTV systems consist of some powerful video cameras, which are able to identify a trespasser and thus decrease crime rates considerably. Though previously this system was used only in public places but at present it is also used at homes to ensure residential security.
CCTV or Closed Circuit Television is an elegant system, which is created with the most updated technologies. CCTV systems are mainly used for surveillance by employing its point-to-point wireless links. These powerful security systems are widely used in important areas, which need special security such as banks, casinos, airports, shopping malls or military installations, army bases etc. CCTV systems were invented with a motto of observing the launch and take off of v2 rockets. In addition, the CCTV systems are also used to monitor the launch pad, before the launch.
Nowadays, the CCTV cameras are also installed outside government offices. The said systems have proved to be great for maintaining security in banks. As a matter of fact, CCTV systems are now holding a superior position amongst all other security systems. It is expected that the CCTV systems would potentially develop into the greatest security system ever invented. CCTV systems can be purchased very easily as the prices are stipulated according to your comfort.
Whether it is at your home or office, CCTV systems are just the best with an entire television network devoted for assured security. Unlike broadcast television, the different components of CCTV systems are hooked directly to each other through cables or direct wireless means. CCTV systems offer you with useful features like Multiple channel audio input, Pan/tilt/zoom, USB backup and Multiple channel video input. These features help you to observe several areas in your home at the same time.
While installing CCTV systems, it is important to maintain the prescribed laws. To be on the safe side, you can consult with your local law enforcement or a lawyer to ensure that local, state, and federal CCTV laws are strictly followed by you. CCTV systems would offer you with a complete protection both at home and outside.
Feel free to get in touch with Alarm Broker.

รับติดตั้งและจำหน่ายกล้องวงจรปิด topcctv.com

contract:Kitipong(L) 085-1375221

วันพุธ, มกราคม 21, 2009

IP Camera คืออะไร ?

IP Camera มันก็คือกล้อง CCTV ที่รวมความสามารถของคอมพิวเตอร์ไว้ในตัวกล้อง เป็นหนึ่งเดียวกัน กล้องไอพี จะเก็บภาพสถานการณ์สดๆ และยิงผ่านไปบน ระบบเครือข่าย IP และอนุญาติให้ผู้ใช้สามารถมองเห็นเหตุการณ์ จากระยะไกล และสามารถจัดเก็บภาพเหตุการณ์นั้น รวมถึงการควบคุมหรือเซ็ตกล้องผ่านทางระบบ IP ได้IP Camera จะมี IP Address เป็นของตัวเอง (ค่า Default 192.168.0.99) ให้เราคิดว่า IP Address ก็เหมือนกับบ้านเลขที่ของเรา มันทำให้ใครต่อใครรู้ว่าเราอยู่ที่ไหน ซึ่งก็เหมือนกับในกรณีของ IP Address ผู้ใช้แค่ทราบ ข้อมูล IP ของกล้องเท่านั้นก็สามารถเรียกดู ข้อมูลภาพจากกล้องได้โดยแค่พิมพ์ IP Address ของกล้องไปบน Intrenet ExplorerIP Camera ไม่จำเป็นต้องต่อกับคอมพิวเตอร์อยู่ตลอดเวลา (ซึ่งจะต่างจากเว็บแคม เพราะมันจำเป็นต้องต่อกับ คอมพิวเตอร์) มันสามารถทำงานได้ด้วยตัวของมันเอง และสามารถที่จะเอาไปติดตั้งที่ไหนก็ได้ ที่มีระบบ Network ที่มากไปกว่านั้นก็คือ กล้อง IP Camera ยังมีฟังก์ชั่นเพิ่มเติมการทำงานอื่นๆ อีกมากมายเช่น
1. ฟังก์ชั่นตรวจวัดการเคลื่อนไหว หากพบว่ามีสิ่งผิดปกติมันจะถ่ายภาพเก็บไว้หรือไม่ก็ alarm เตือน หรือส่ง mail ไปยังผู้ดูแล
2. ฟังก็ชั่นเสียง กล้อง IP Camera ยังมีความสามารถที่จะส่งข้อมูลภาพและเสียงได้พร้อมกัน (บางรุ่นไม่ Support)
3. ฟังก์ชั่น Input และ Output ซึ่งถือว่าเป็นฟังก์ชั่นอรรถประโยชน์ ผู้ใช้สามารถประยุกต์ได้หลายแบบ
4. ฟังก์ชั่น Serial Port สำหรับผู้ใช้ที่ต้องการจะเอากล้องไปติดกับตัวคอนโทรล Pan/Tilt
เขียนโดย Indy ที่ 1:47 ก่อนเที่ยง

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CCTV: Closed Circuit Television


Closed Circuit Television (CCTV) is an installation of directly connected components creating a circuit which cannot be viewed by anybody outside of the circuit.
This is different to a terrestrial television broadcast system which anybody with an antenna and reception equipment can view.
Who needs a CCTV system?
CCTV systems can be found virtually everywhere in these days. They are no longer considered an expensive luxury item, especially when you consider your increased level of security.
CCTV systems can be found in both the private and commercial sector and are used for security/ crime prevention purposes and providing Health and Safety protection to the members of the general public.
You will have seen CCTV systems operating in town centres, football stadiums, high street shops, sports centres, petrol stations, on public transport - the list is endless.
A CCTV system is a proven method of increasing the level of security of your premises. Its visual appearance alone will deter a criminal from approaching or entering your property for fear of being captured and identified on the system.
CCTV solutions can be tailor made to suit individual requirements. They can be as simple as one camera and a monitor, but it is quite common to have multiple cameras/monitors and recording devices in one installation.
The Elements of a CCTV System
There are three basic elements to a CCTV system,
1. Camera 2. Lens 3. Monitor unit
The camera is the element which captures the image and transmits the picture back to a monitor. The camera needs a lens to be able to focus on the subject. There are a wide variety of lenses to suit different applications.
The monitor is the receiver unit which converts the captured image into a picture, allowing you to see it.
Colour or Monochrome?
This is a very common question, but ultimately only you can decide.
A CCTV system should be designed to suit your needs, to fit into the environment on your property. The installing company should provide guidance on the suitability of different options, features and benefits - including colour and monochrome units. It may be that you need a camera that will work in colour during the day and automatically switch to monochrome at night!
Recording
As circumstances don't normally permit the luxury of having a dedicated person to sit and watch a monitor 24 hours a day, the image captured by the camera needs to be recorded so that it can be viewed later, if necessary.
Traditionally, this was done with a time lapse Video Cassette Recorder (VCR) which worked on the same principle as a domestic video but with the ability to record for a much longer period of time.
However, the VCR has now been superseded by the digital Hard Disk Recorder (HDR). Rather than using tapes, the HDR stores the images on to a hard disk drive similar to the way a home computer stores data. More than one camera?! Most systems today comprise of more than one camera, but you don't; a monitor and recorder for each camera. Equipment is available that will split the monitor into four separate screens displaying four cameras, or a four way sequence unit can be used which allows you to choose which camera you would like to view. Alternatively, the automatic mode it will sequence through the four cameras that are connected. However, the most common way of controlling multiple cameras is via a multiplexer. To keep it simple, a multiplexer incorporates the above facilities but also has the ability to individually code mark each image from each camera and because of this, a multiplexer allows all of the cameras on a system to be recorded onto one tape or hard drive unit. The multiplexer then uses these code marks to play back the recorded picture from the camera that you wish to view. Historically multiplexers and recording units were separate pieces of equipment, but recently a number of manufactures have developed units that do both jobs.
I want......I need....... These days, a CCTV system can be designed to fit any scenario you care to imagine, using options from the vast range of equipment available from manufactures worldwide. For example, cameras can be internal, external, highly visible or covert. They can be static or fully controllable/movable from a remote location. You can have one camera or hundreds; you can record for one day or 21 days. With a suitable internet connection, you can even view your property when you are abroad. Get the picture??!!!
Quality Counts. Although an avid DIY-er can buy equipment that claims to be a CCTV system from their local store, and electrical companies have jumped onto the CCTV bandwagon and will install systems too, it is always advisable to seek the advice of a specialist company. Why? In around 70% of cases, CCTV footage is found to be inadmissible as evidence in a Court of Law because the quality of the evidence is considered inadequate. This can result from the poor design and bad installation of the system and highlights the importance to seek professional advice from the outset Only a specialist company who are professional in their approach and can demonstrate experience in design and installation should be approached. Most importantly, you must feel confident that the company you choose will listen to and understand your individual CCTV requirements. Their experience with lens optics and camera technology will guarantee you satisfaction with your system.
A specialist company will also ensure the best value for money, for example by using a different lens or camera mounting positions which can not only monitor the area at risk but also give an outline view of the surrounding area at the same time.
Data protection A CCTV system must be registered in order to comply with the data protection act of 1998. Since 24 October 2001, it has been a criminal offence to have an unregistered CCTV system that records people in a public or a private place (conditions apply). The Code of Practice contains legally enforceable 'Standards' that must be met to ensure compliance with the Data Protection Act 1998. There are also a further 30 points of good working practice which, when used in conjunction with the Standards, are designed to build and maintain public confidence in CCTV systems and to ensure that installers and users operate within the law. The Code of Practice is available for you to view at www.dataprotection.gov.uk.

Home Security- CCTV

CCTV is an important instrument for secure homes and business places. CCTV is the abbreviation of Closed Circuit Television, which is used to monitor certain areas and help to protect it from burglars and thieves. The monitor is a key aspect to the video surveillance setup, and will feed the video from the cameras that make up the system. The monitors are normally black and white and feature a higher resolution than that of a standard television set.
As the name implies, Closed Circuit Television (CCTV) is a system in which the circuit is closed and all the elements are directly connected. This is unlike broadcast television where any receiver that is correctly tuned can pick up the signal from the airwaves. Directly connected in this context includes systems linked by microwave, infrared beams, etc. This article introduces the main components that can go to make up CCTV systems of varying complexity. Closed circuit video magnification systems are capable of higher levels of magnification and can manipulate the brightness and contrast of the image.
CCTV is the use of video cameras to send out a signal to a specific, small set of monitors. Many stores use CCTV as a theft prevention deterrent. CCTV is used in a wide range of areas where large amounts of people gather. It is also used in areas where security is very important. Many factories use CCTV to keep track of entrances and exits. CCTV is different from broadcast television due to the fact that the signal is not openly transmitted. CCTV is widely used for surveillance. It is generally used in areas that need heightened security. Banks, casinos, and airports and military installations often use CCTV in addition to security patrols. CCTV allows these areas to employ less security officers and still have a high security level. Many, if not all, CCTV systems make images to be recorded. These recordings can be used in case of any theft, security breaches or other incident. In a number of large industrial factories, CCTV equipment is often used to watch parts of the factory from a control room. Often CCTV allows workers to view areas where the environment is not safe for humans to work. Many factories that deal with hazardous materials installing closed-circuit television in order to keep workers safe. CCTV systems may operate non-stop or only as required to monitor a particular event or during business hours. It has become essential for CCTV to truly be closed. The use of CCTV continues as a result of the need to meet the terms of data protection laws and human rights. In a wide number of countries, CCTV legislation dictates that many of these surveillance systems must also supply any member of the public, with a legitimate reason, with copies of any recordings. A closed-circuit television used for surveillance may deter crime by being "a closed circuit" but it is also essential to watch over the public to keep these systems from being used for improper purposes. Large companies now perform closed-circuit television and video surveillance across a number of platforms. Many times these companies often use securely linked closed-circuit television systems that are connected to a central monitoring and recording facility over the Internet.