Video systems are becoming a part of our daily lives. When the video surveillance systems for the first time on the market in the mid-80s, which have a significant impact on crime prevention and how crimes are investigated. The first video systems requiring a hard connection between the camera and recording system. Recent innovations in wireless video transmission is to change the requirement.

Wireless video systems pop up all over the worldThe place to meet a wide range of consumer needs. From a wireless baby monitor high-end high-definition transmission systems, wireless, wireless video systems are available in a wide range of prices, features and functions.

Most modern consumers of video quality wireless systems fall into one of the following frequencies, 900 MHz, 2.4 GHz or 5.8 GHz Almost all quality affordable consumer wireless cameras on the market fell to 2 4 GHzrange.

Each system consists of a wireless video camera, a transmitter, a receiver, an antenna and a power source. The transfer is achieved vary widely, depending on the frequency, the antenna and the power rating.

With the exception of the higher price class, high power transmission systems of quality, most wireless video systems that do not require a license from the Federal Communications Commission (FCC) to not work. No matter what your plans are on track to use when you installA high-powered equipment, particularly near a road or an airport, make sure the appropriate FCC license.

For best results, the longest and most wireless video transmission systems require a clear line of site between the sender and recipient to work in a consistent manner. Wireless video signals do not penetrate very well, not glass, walls, concrete, trees, steel or other obstacles.

Moreover, the various RF signals on the same frequency cancause interference or be interfered with by wireless video systems. 2.4 GHz, the most popular security programs may be interference between mobile phones, microwave ovens, television rooms, computer monitors, power supplies, or wireless LAN / WAN experience. Some interference problems can be solved with the introduction of new transmitters or receivers.

Since 90% of the class of consumer wireless video systems fall into the category of the 2.4 GHz, wediscuss the characteristics of both the 2.4 GHz analog and digital systems and the limitations and benefits of each.

The entire bandwidth of 2.4 GHz is intended for consumption in the 2412 MHz to 2462 MHz FCC, there are 11 possible channels of 22 MHz with a 5 MHz wide space between each interval.

In view of multiple cameras on the same system that allows for residential, consumer-grade 2.4 GHz analog video transmitters, such as a wireless baby monitor or afront camera needs at a fixed rate, non-overlapping channels to reduce interference.

This 2.4 GHz wireless analog cameras are some of the most popular video surveillance systems to consumers and end users, but very few insurance companies will offer this professional wireless cameras.

At best, I think professional installers of security systems around 2.4 GHz analog video low housing repairs, commonly known so unreliable. The2.4 GHz analog cameras are easily identified by their price, which is usually $ 69.00 to $ 140.00 per set of the camera.

If you take advantage of their low cost, there are several limitations inherent to 2.4 GHz Analog video transmission, including:

At 2.4 GHz, there are only 4 channels do not overlap. Such limitations of these systems on a total of 4 cameras, each tuned to a second predefined frequency. Each of these fixed frequenciesis able to transfer about 11 mega bits of data per second (Mbps).

Why 2.4 GHz analog wireless video transmitters at fixed frequencies are particularly susceptible to interference from external sources. A typical range of transmission at 2.4 GHz for an analog wireless video link is about 200-300 meters, when installed outdoors, with a clear line of site. The relative distance transmission is significantly reduced when installed indoors, with a lower end of some analog systemsusually around 10-30 meters.

Since these cameras on a permanent, secure opening rate is sent, the signal can be easily retrieved and viewed by anyone with a 2.4 GHz 4-channel receiver. A voyeur or an intruder could only drive around a neighborhood with a receiver and look inside your home. If you're one of these systems to install, maybe a thief that you see now.

In 1997, the Institute of Electrical and Electronics Engineers (IEEE)The first Wireless Local Area Network (WLAN) standard 802.11, which takes its name. The original 802.11 uses 2.4 GHz for reliable transmission of 2 Mbps of bandwidth. In 1999 the standard was updated to 802.11, which supports up to 11 mega bits per second (Mbps), which is comparable to the speed of traditional Ethernet connection.

802.11 protocol works by breaking down the entire channel of 2.4 GHz and switch between them during shipping. Ifthe signal is sent, it sends a packet of information at a frequency and then hop to the next channel and sends a packet, and so on until the entire data packet is sent.

In 2003, WLAN products with the support of a new 2.4 GHz wireless standard called 802.11g, which supports a bandwidth of 108 Mbps of data. The days cost effective, reliable and secure wireless video transmission, has finally arrived.

Additional features and advantages of using Internet Protocol for the cameras and 802.11gwireless video transmission in a security program are many.

802.11g protocol is used for bidirectional digital signals using the pan / tilt / zoom functions and presets available in many newer cameras support. The digital signal is used duplex (bi-directional), in contrast to the simplex (one way) binary signaling types used in analog systems.

Because 802.11g uses the entire spectrum of 2.4 GHz, the interference is much smaller transmission and longer, whenbe expected. If an area of spectrum is noisy, then sends / receives the signal passes through the transmission of small packets and parcels in the affected area noisy greatest in areas not affected the frequency. A wireless IP video system will provide almost the same as a system of professional quality wired with a range of reliable transmission of 150-200 meters.

If the camera is more than 200 antennas can be directional meters are available that can improvea distance of 600 meters or more. If a distance of more than 600 meters is required, from point to point, you can write a long series of directional systems increase the distance of several kilometers.

In addition to the standard protocol 802.11g Security WEP 64/128 bit data packets can be encrypted using a key 40-bit RCA. When viewed in conjunction with the intrinsic safety built in DSSS spread spectrum, data signals are at least as secure as data traveling on anetwork cable.

802.11g capable of maintaining a much larger number of cameras using a wireless medium access control or MAC layer is called CSMA / CA, or Carrier Sense Multiple Access / Collision Avoidance. The collision was avoided in 802.11g support using CTS / RTS signals (ready to send / Clear to Send), which tells the system where each camera is OK to start the data transfer, and thus without interference received.

Any Hard IP camera installed on yourIntranet or Internet using the same codec (encoding and decoding) algorithm in the same software can display and record the integrated system.

An IP-camera system can be seen or detected by a properly equipped computer anywhere in the world. We can not allow freedom to move around the world, holding down your assets. Also, if you decide to move the head end control to another location, simply selectand move it. Allowed to re-route.

One thing to remember when implementing a multi-camera, wireless IP-based video system is that the processing of multiple streaming signals a significant amount of work sites on a computer's CPU.

Hardwired systems video capture card installed on PC / DVR. These cards can be up to half the workload of the CPU of the computer. For wireless IP video systems do not support the inclusion of these dishes, while the computer with CPUmanage 100% of the workload of processing.

This means that if you have multiple cameras to a wireless system, the overall picture of the total images per second, which can be seen and recorded will decrease because of increased workload.

Some people are afraid of IP and network security solutions, because it seems to be complex and difficult to establish. The fact is that the initial configuration does not require skills and knowledge, but the operation and daily use ofsystem security camera systems are no different from any other computer based. The computer skills required are minimal. If a person is able to monitor e-mail using a word processor or download and play any game type on a computer, probably has the necessary skills to implement and manage a PC based system.

Related posts:

1. Wireless Home Security Cameras
2. Holiday Video Surveillance
3. Wireless Home Security – E 'right for you?
4. Why CCTV systems are equally effective
5. Wired or Wireless Home Security
6. A safe place called "Home"
7. Security Camera Signs
8. Compare Home Security Systems – How to get the program right to choose
9. Stand Alone Keyless Access – How?
10. Wireless Home Security Alarm Systems – Advantages and disadvantages