AHD technology or Analog High Definition Technology

The market of video surveillance systems offers  vast choice of security systems and solutions. All of them are based on different technologies, such as HD-TVI, HD-SDI, HD-CVI, AHD technology. The consumer has wide opportunities to choose the most relevant one.

In this article, we will speak about AHD (Analog High Definition) technology. This technology is a relatively new one in the market. Anyhow, it has managed to gain great popularity in short time, because of its appealing features for end-users.

Explained simply, AHD technology uses coaxial cable for transmitting HD/Full HD video, audio, and the control signal from the security camera to the Digital Video Recorder-DVR without any latency or loss at the distance of 500 meters. One interesting feature typical to AHD, that the quality of coax cable doesn’t play any significant role for transmission. That’s why any coax cable is suitable.  AHD supports 720p and 1080p HD video resolutions. AHD security cameras deliver either 1080P HD or 720P HD clear sharp images.

One of the advantages of AHD technology is that AHD video recorders can work in three formats. Therefore with three types of video cameras: standard analog D1/960H, AHD and IP. Due to this smart feature, you can connect already installed IP or/and standard analog video cameras to AHD video recorder.

Like HD-TVI, AHD technology is also an open technology, which allows a customer to choose AHD equipment of different manufacturers because they are compatible with each other due to the same technology used.

Here we want remind our readers once more that CVI, AHD and TVI technologies aren’t compatible with each other. In this case, if you already used AHD cameras you should use AHD DVRs. TVI cameras will not work with CVI DVRs and vice versa.  AHD security systems gained popularity, as they have rather an affordable price while offering high-quality images. Easy operation is also one of the benefits: they are easy to use, plug & play, therefore no encoders, converters or switches are required. Installers with limited experience of IP network systems can easily cope with the installation process. AHD cameras and DVRs are installed using the same coax cable as traditional analog CCTV cameras. Some end-users prefer to use UTP cables such as CAT5, CAT5e, or CAT6 and get a transmission distance up to 1000 feet.

Samsung Wisenet Security System and Solutions

Samsung offers consumers and security professionals a new, affordable, high quality, easy to use security systems. AHD technology connects the high resolution of HD technology with the easy installation process of analog systems.

Samsung Wisenet line security cameras incorporated AHD technology, thus enabling to deliver superb quality HD images over coaxial cabling.

WiseNet HD+ cameras and DVRs appeal to end-users who are eager to capture and record Full HD 1080p images, but they don’t want yet to migrate from analog to an IP network based video surveillance solution.

7 Tips for Protecting Home Automation System from Hackers

There is no need to discuss how useful home automation systems can be, as beyond any doubt, they make our life easier, safer and incredibly convenient. Due to smart home automation systems, home owners can manage all home devices from one place, thus also maximizing home security level. Automatically lock and unlock doors, turn on and off the lights being in another place, make a video feed of your home available on your mobile phone, and even include thermostat control.  Anyhow, many systems are also vulnerable to home automation hackers. They are very often able to break in to change settings, access video feed, what is more dangerous, unlock doors of the house or garage so that they can easily access your home. If homeowners just follow these simple rules, their home automation systems will be more protected against hackers’ attempts to take control over their property.

#1 Set password

Always, in any case, set a password. Use strong passwords, weak passwords are easy to guess. The best choice are strong passwords with numbers, letters, and characters.  Also avoid using real words or names.

#2 Change your password regularly:

Even if hackers have already revealed Your password, regular change can save the situation.

#3 Secure Your router:

In case the router is secure, it makes all the connected devices strongly protected. It would be excellent if homeowners chose routers which have strong security features. Also, make sure you change the default password to a new, stronger one while installation.

#4 Choose reputable brand:

It is always tempting to order some cheap system from unknown brand, but you should always have in mind that this can cost a lot more, than a trusted product from a well-known brand. They will also give more practical instructions against home automation hackers.

#5 Consider having a separate network for your home automation system:

It is a good idea to create multiple access points on the router for two different networks.  One will serve for your computer and mobile devices, and the second will be used for your home automation system. So, even if a hacker reveals your network password from your mobile or laptop, they still won’t be able to access your home automation system.

#6 Check the camera logs.

Many security cameras give access to users to the history of which IP addresses have accessed to the camera feed. Checking the camera logs regularly will help to make sure no one has accessed your home surveillance system. If you notice any suspicious behavior, immediately change your password and contact your security provider.

#7 Don’t use public Wi-Fi

Using home automation applications on public Wi-Fi can easily give access to hackers. Turn off the Wi-Fi and use secure mobile data instead before using a home automation application. Using an encrypted mobile website if your system offers that feature is also a good idea.

HD-TVI Technology

While choosing security cameras one should clearly understand, what tasks he is going to solve, what security challenges he faces, and what security solutions are needed for managing the whole process. It is also of great importance to estimate the right budget for the project. After that, from wide CCTV market you can choose the camera which fits your security needs. When it comes to high quality and affordable price, HD-TVI technology is the first the security professionals should consider.  Let us introduce HD-TVI technology briefly below.

How it All Began

HD-TVI stands for High Definition Transport Video Interface, its technology, DSP-TVI, was developed by Techpoint in 2012 and was used by certain manufacturers, Hikvision among them. HD-TVI technology was launched to meet the demands of the market regarding high definition video surveillance.

Affordable Price – Good Quality

HD-TVI cameras offer excellent quality at affordable price. This is the main reason that in short time they became demanded in CCTV industry. TVI technology is available in 720P or 1080P versions. KOA CCTV offers its customers mainly 1080P security cameras. These cameras offer longer transmission distance (1500 feet or 500m) and no video quality loss during the live or recorded video. Actually, they offer longer transmission distance than other HD over coax technologies. The cameras are also backward compatible with analog cameras, thus becoming a truly transitional technology.

Easy Installation

One of the main advantages of HD-TVI is an easy installation, it is also easy to use and operate. While other formats are limited in camera compatibility and channel configuration,  HD-TVI is open-standard.This features enables hundreds of other manufacturers develop analog security cameras based on these exceptional technologies. This important feature also keeps it on the forefront of technology with the competing demands for security and convenience. If You have difficulty in choosing an HD-TVI camera, or have questions, professionals at KOA CCTV are ready to help and offer proper advice!

Source:https://koacctv.com/hd-tvi-technology/

Advantages of Intercom Systems

An intercom system is a special a two-way communication device for transmitting and receiving audio or audio/video data. Intercoms can be wireless, wired, Video Intercoms, Apartment Intercoms, Gate Intercoms etc. Having an intercom system installed at your house or office is no more a luxury, but a necessity, as it acts as a crime deterrent. Nowadays intercoms became essential part of security measures and they serve for both security and convenience purposes. Intercoms are widely used at houses, offices, hospitals, schools, airports etc

N1 Security

The main benefit of intercom systems is the increase of security level. Being able to know, and very often to see (In case of video intercoms) who stands in front of the door before opening it gives the property owner peace of mind, that intruders will mainly escape their area. By the way, intercom is an extra layer of security, which increases the price of the property, and is usually taken into consideration while dealing with insurance fees.

They are essential especially for baby monitoring both for houses and childcare centers, where permanent communication between rooms is very important.

N2 Unwanted Visitors

Intercom Systems will save your time, and free you from opening the door to various salesmen, promoters, strangers etc. You can just politely ask them leave using a two-way audio intercom, even if you are at a far end of the house. Intercom systems with integrated door locks are a great help especially for businesses, when it is essential to know, who enters your property area, and the opening of the door needs monitoring.

N3 Comfort

This works especially for big houses or business areas, when for communicating someone you don’t need to take your phone and call, but just a push a button and speak. This is especially essential for large houses with many kids, elderly people, and people with a disability.

We all need more and more time for ourselves every day, and the development of home automation gives us the opportunity not to waste our precious time on running to the door every time the bell rings or checking on the children every 10 minutes.

N4 Constant Development and Upgrade

Intercom technologies keep developing all the time, to meet the needs of a consumer. There are intercoms with integrated door locks and card key systems, wireless ones, linked to smartphones, enhanced with security cameras, touch screens, control of audio systems, lights, curtains, room temperature, etc.

Hikvision 5MP CMOS Infrared Network Bullet Camera

Hikvision 5MP CMOS Infrared Network Bullet Camera DS-2CD2052-I combines a compact design with high quality. Due to 30 IR LEDs, the camera delivers outstanding video images with long-range visibility of up-to 30 meters in low light or completely dark environment.

Up to 5 megapixel (2560 × 1920) resolution, industry-leading WDR technology and IR cut filter with auto switch make this camera stand out in surveillance market. Camera also supports VCA, which is compatible with NVR for the second time of video searching and analyzing. The camera comes with a mass of features like 120dB WDR e, 3D digital noise reduction, electronic shutter for different surveillance environments and IP66 rated weatherproof metallic housing which makes the camera durable against harsh outdoor weather conditions.

The DS-2CD2052-I can well meet customers’ demand for consistent high-quality images regardless of low light conditions, which makes it very competitive in the IP security camera market. Besides, camera is manufactured by Hikvision, which is the world market leader for security cameras and accessories for video surveillance. KOA CCTV is an authorized distributor of Hikvision products. Find full Hikvision catalog here. https://koacctv.com/cctv-products/hikvision-usa

Hikvision Accesories

While dealing with security cameras, installers need different accessories. These small, yet very important parts are necessary for every project, every installation process.  Naturally, while buying a camera it is very important to get it from a store which also offers wide assortment of accessories, so as to get the kit from one spot, and not to miss any important detail. Monitors, power supplies, video baluns, wall mounts, converters, extenders, repeaters, housings, this is not the whole list of accessories you will find at www.koacctv.com. At koacctv we offer a wide arrangement of cctv accessories, and here we want to present you accessories from Hikvision, largest video surveillance and electronic security manufacturer in the world.

Hikvision Wall Mounting Bracket For Mini Dome Camera

Hikvision PTZ Wall Mount Long

Hikvision Corner Mount

  

Hikvision Aviation Connector Cable

                                       

Hikvision USB Keyboard

Hikvision RS-485 Keyboard DS-1003KI

                         

Hikvision Smoke Glass Cover for DS-2CE56XXX-VPIT3Z

Hikvision DS-1280ZJ-DM21 Bracket for Dome Camera

Hikvision HD-TVI Ground Loop Isolator

Hikvision HD-TVI Converter DS-1H33

                                       

Vertical Pole Mount Bracket

Hikvision DS-1293ZJ Wall Mount Bracket

The whole list of Hikvision accessorize  can be found here: ▶ https://goo.gl/XS9mbE
                                   

IP Protection: IP54, IP64, IP65, IP68

When it comes to weatherproof or waterproof enclosures, security camera installers need to have a clear knowledge what IP65, IP66 or IP67 mean. In general IP stands for Ingress Protection. IP ratings are given in form of two-digit code, such as IP68 or IP67. The first numerical digit describes the rating that is given for solid objects. The second digit represents the level of protection against fluids. The higher the number, the stronger the level of protection. For detailed information see the chart below.

Protection against solid objects
1st Digit	Protection Level	Details
0	Non-protected	Non-protected
1	Protected against solid objects greater than 50 mm	Large body parts, such as a hand or a knee.
2	Protected against solid objects greater than 12 mm	Fingers or similar objects.
3	Protected against solid objects greater than 2.5 mm	Tools, wires, etc of diameter or thickness greater than 2.5 mm.
4	Protected against solid objects greater than 1.0 mm	Wires or strips of thickness greater than 1.0 mm. Generally,  solid objects exceeding 1.0 mm
5	Dust protected	Ingress of dust is not totally prevented but dust does not enter in sufficient quantity to interfere with satisfactory operation of the equipment
6	Dust-tight	No ingress of dust, complete protection against contact.
Protection against liquids
2nd Digit	Protection Level	Details
0	Non-protected	No special protection
1	Protected against dripping water	Vertically falling drops
2	Protected against dripping water when tilted up to 15º	Vertically dripping water shall have no harmful effect when the enclosure is tilted at any angle up to 15º from its normal position
3	Protected against spraying water	Water falling as spray at an angle up to 60º  from the vertical hasn’t any harmful effect
4	Protected against splashing water	Water splashed against the enclosure from any direction  hasn’t any harmful effect
5	Protected against water jets	Water projected by a nozzle (6.3 mm) against enclosure from any direction hasn’t any harmful effect
6	Protected against powerful water jets	Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
7	Able to protect against Immersion up to 1 m	Ingress of water is harmless when the enclosure is immersed in water under defined conditions of pressure and time
8	Able to protect against Immersion beyond 1 m	The equipment is suitable for continuous submersion in water under conditions, specified by the manufacturer

Hikvision 4K Smart IP Indoor Dome Camera: DS-2CD4185F-IZ

4K Surveillance systems provide sharper, clearer, crisper images ever. These systems are perfect for large area coverage and are perfect for identifying objects even at great distances. The 4K series smart cameras are able to capture super high quality images.
The DS-2CD4185F-IZ 8MP 4K Network Dome Camera from Hikvision with
1/1.7” Progressive Scan CMOS and a 2.8 to 12mm Motorized Lens with smart focus is able to capture super high quality images at a resolution up to 4096 x 2160. It supports H.264 and MJPEG compression formats. DS-2CD4185F-(IZ) offers 8MP HD resolution with up to 22fps frame rate, DWDR, PoE, 3D DNR and complete Smart Feature-set to meet a wide variety of applications. Special defog technology aids clearer visibility in smoky, and hazy conditions.
The camera supports image distortion correction, rotate mode, suitable for environment as corridor, regional cropping, details can be seen with low bandwidth. Digital WDR is supportable for backlight environment.
Due to the built-in 128G Micro SD/SDHC/SDXC card storage up to 128GB data can be stored internally.
The camera is vandal resistant.

KEY FEATURES

      Smart

•  6 behavior analysis, 4 exception detections, 1 recognition, 1 statistic function.
•  Smart recording: Support edge recording and dual-VCA. 
•  Smart encoding: Support low bit rate; low latency; ROI enhance encoding 
•  Smart lens options: AF lens (-Z)

Image 

• HD 4096 × 2160@22fps 
• Supports image distortion correction (-Z) 
• Support rotate mode, suitable for environment as corridor. 
• Support regional cropping, details can be seen with low bandwidth. 
• Code smoothness setting for different requirements of image quality and fluency. 
• Multiple OSD color: Black & white self-adaptive; Custom 
• Digital WDR is supportable for backlight environment. 
• Support defog, BLC, HLC.
• Support H.264+/H.264/MJPEG video compression, multi-level video quality configuration; support Basic/Main/High profile H.264 encoding complexity.

 Infrared 

•   Irradiation distance is up to 30m
•   Smart IR, prevent over-exposure in close distance

System 

• Support ONVIF (profile S/profile G), CGI, PSIA, ISAPI protocol. 
• Support three streams, and Support 20 channels live view at the same time. 
• AF automatic fast focus, maintain focused during zooming (-Z)
• Anti-thunder, anti-surge, anti-static, IK10 protection level.

 Interface 

• Support standard 128G Micro SD/SDHC/SDXC card storage.
• Support 10M/100M/1000M Ethernet Port. 
• Support Audio I/O, support dual channel stereo audio.
• Support Alarm I/O 
• Support CVBS analog output (4CIF resolution) 

Security

• Support three-level user authentication management, user and password authorization, IP address filtering and anonymous access.
• Support security certificate as HTTPS, SSH; support creating certificate.
• Basic and digest authentication is supportable in IE configuration
• Lock user IP for many times error login 

EZVIZ Mini Plus 1080p Wi-Fi Camera

Wifi cameras are extremely popular, as it is great to be able to know what's going on when you're not actually there. Whether you're checking in on your kids, the babysitter, beloved pet, or Your valuables, a camera is a great tool for keeping an eye on things from afar.
EZVIZ products have been designed for your entertainment, communication and security. When you install the EZVIZ APP on your smartphone or tablet, EZVIZ devices will connect to the cloud via their QR code. With EZVIZ you can talk to your loved ones, watch your child’s progress when you are away, keep an eye on your home and interact with your pets.
KOACCTV offers EZVIZ Mini Plus 1080p Wi-Fi Camera, a great camera for indoor use. Thanks to the high quality microphone, built-in speaker and two -way audio you can keep an eye on your children, and even play with pets.
The camera has a 1/2.7" progressive scan CMOS sensor to capture high-quality 1920 x 1080 resolution video at up to 30 fps for smooth playback during the day. At night, the IR cut filter and IR LED help the camera produce clear images from up to 25' away, even in complete darkness.

• 1080p Real-Time Video
• 135° Viewing Angle
• Night Vision
• Two-Way Audio

EZVIZ Mini Plus 1080p Wi-Fi Camera

Dummy Cameras: Security or Illusion?

Have You heard of dummy cameras? Of course, as it is rather common to use them in surveillance purposes, when one cannot afford buying a real security system or security cameras. Dummy security cameras imitate the appearance of real cameras and there are cases when they really help to deter crime. Installing fake security camera is surely a better idea than having no security cameras at all, or trusting the property security to a dog.

 Nowadays, fake security cameras are available in different sizes, colors, shapes. In most cases they use the original housing. There are dummy cameras which have some features like a fake pan/tilt/zoom, or red lights which make the camera look more realistic and achieve better results. Of course dummy cameras have the advantages of being much cheaper, they don’t need any maintenance and in certain situations they are useful. But before buying a dummy security camera, you should review all pros and cons seriously, and make the right decision. You should understand, that when it comes to security and protection of what is dear to us, fake cameras are a great risk. 

In most cases burglars and criminals are capable of telling the difference between a fake and dummy camera at one glance. As the 80-90% property crimes are being planned beforehand, the cameras, burglar alarms and other deterrents are also checked beforehand. Always remember, that a real security camera is a safer bet than a fake one. Besides, when something bad happens to Your property or business, you will not have a surveillance footage, if you had have chosen fake security cameras. The use of fake security signs and stickers is also a bad idea, as it takes only a few minutes to google the company name and find out, whether your house is secured by that particular company or it is a fake.

It's not a good practice from a security point of view or, when used for business, from a business point of view. Besides, dummy cameras may mislead other people in that certain area of “Surveillance” into fake sense of security, thus resulting in potential liability issues for the location owner in case of accidents. 

Installing fake security cameras is a bad idea, especially when the property is located in high crime areas, if you have valuables, which should be well protected, and of course, if the well-being and security of your family members, employees or customers matters most. Modern CCTV market offers affordable security cameras and security systems, and one should realize, that this is not the case to save or go on budget. Anyway, Hikvision offers security cameras and security solutions which fit to any budget. Hikvision offers best quality for affordable price, and this is where it stands out in the market. To know more about quality security cameras and home innovation systems, please follow the link.

DS-2CD6424FWD-L40/E1 - Hikvision Pinhole Covert IP Camera

In modern world, with the rise in robberies and break ins, even ATMs where usually people come to withdraw or deposit cash are not safe as most of the robbers keep their eyes on places where money transactions are more on daily basis. Very often we come across with the news of people making withdrawals being attacked or the entire ATM machine itself being stolen. ATM-related crimes including robbery, fraud, vandalism and even theft of the entire machines have become increasingly common.

In bank ATMs, It has become a necessity for banks to safeguard the ATM and its users. Nowadays, in the USA, one can rarely find an ATM without a security camera, and it a primary task to choose a qualified, vandal-proof and certified product, as ATM security issues are of great importance, especially in areas with high rate of crime.

World’s leading supplier of video surveillance solutions, Hikvision, introduces DS-2CD6424FWD-10 - Hikvision 2MP WDR Pinhole Covert Network Camera

DS-2CD6424FWD-XX is covert camera for ATM surveillance, key features including: Single or dual lens camera body is optional, cylindrical, L-shaped and tube shape of lens are optional; 2m or 8m (between lens and camera body) cable is optional for flexible installation DS-2CD6424FWD-XX 1080p HD resolution for real-time output; Rotate mode, BLC, True WDR are for different environment. 

Key Features: 

• 1/2.7” Progressive Scan CMOS
• Up to 1920×1080@30fps for real-time output
• True WDR, up to 120dB
• PoE power supply is supportable 
• Built-in Micro SD / SDHC / SDXC card slot, up to 128GB
• Support HLC, Defog 
• Optional appearance of the front-end(the mini bullet and block) and brackets

7 Signs, that Your House has been Targeted for Robbery

According to FBI statistics, every 15 seconds a house is being robbed in the USA. 9 out of 10 burglaries are usually planned beforehand, so there are a few signs, which are indicators that Your house is being watched for not-so-good-purposes. Here are some situations You should watch out.

1. There are strange marks on the fence, on garage, on the house itself. If You are sure, that its not Your kids' art, then consult the police officer as soon as possible.

2. You have spotted a strange person walking slowly in Your neighborhood and observing Your house. This is to be taken into consideration carefully, because he might just turn out to be a lost passer-by.



3. A vehicle that you haven't seen before on your street: The first warning sign is a vehicle parked and unattended for a long time or at random times near your home. It doesn't belong to your neighbors or anyone you know in the neighborhood.

4. In general people have an appointment set in advance when a cable repairman or TV installer is stopping by to fix or service your equipment. So if a handyman, workman, or anyone else comes to your home unannounced, take warning.

5. Another knock at the door by a stranger who asks to use Your bathroom or wants a glass of water. It is possible, that he would be a random passer who is just in need of anything, but anyhow, better safe than sound, keep an eye on him.

6. Your locks, window locks or garage door/window is mysteriously broken. You should hurry to fix them and check Your alarm system.

7. There are promotional materials at the front door, like visit cards, promo-offer catalogs, sticky notes on the door. Usually burglars put all these at the front door, to check if homeowners are at home, or not.


Many people think that wasting money on a home security system is useless and they try to take the responsibility of keeping their home safe by not having a security alarm system, and only after a burglary or another accident realize, that investing on a security system is vital for their home protection.  Keep Your property secure and safe with security system. That's the best deterrent for burglars.

Interesting CCTV facts

1)  The first CCTV camera was installed in Germany for observing the launch of V2 rocket at Test Stand VII. Walter Bruch, a German engineer was responsible for the entire installation and design of this system.

2) Security cameras were first applied in banking industry!

3) UK has over 6 million cameras, which equals to 20% of the world’s total surveillance camera installations.

4) According to IHS, there were 245 million professionally installed video surveillance cameras active and operational globally in 2014

5) Criminals also use security cameras. For example, near ATMs to record your PIN number and bank.

6) According to a research, the average citizen is caught about 300 times a day on a CCTV camera.

7) Every time you use ATM, you're being recorded by tiny CCTV cameras inside the machine, though they're incredibly hard to spot.

8) Though only 9% of consumers actually own CCTV in their homes, it is estimated that 67% of burglaries can be avoided by simple installation of CCTV.

9) Nowadays China is totally covered by surveillance

10) The average citizen appears on a security camera over 300 times a day

Video Surveillance in Childcare Centers

Video Surveillance is number one priority in any child oriented and safe Childcare Center. Every parent wants to be sure that their child is being treated well, properly cared for and is not abused in any way. Professional security cameras with advanced features are the best solution. Either the parents are given the camera feed on their devices or they will be allowed to monitor children at Daycare, in special room, is a matter to be discussed and decided within parents and Daycare authorities. For some people access given to all parents is an issue of privacy, and there is an anxiety that other parents are watching not only their own, but also the other children, that is why many Daycare Centers choose the method of monitoring at Daycare territory. There are also centers that choose method of authorized parent monitoring. Anyhow, whatever method is chosen, security camera in Childcare Centers is a must nowadays taking into consideration the fact that cases of child abuse increase every year. Every parent will have peace of mind, knowing that he/she will be sure, that the child is in safe surroundings.

Unfortunately, child abuse is not an uncommon thing in nowadays society, so why not to solve this problem with the help of technology? If a Childcare Center installs surveillance cameras for the purpose of allowing parents to monitor children in the daycare center, all daycare employees, attendants and parents must be informed about the cameras' intended use. Daycare authorities are obliged to maintain safe communication security measures to prevent unauthorized access to the video surveillance system. Generally, cameras are not installed at bathrooms and diaper changing rooms, anyhow, they can be installed, if that is the decision and requirement of all parents, and is not against the specific state laws, as in different states there are laws regulating privacy matters.
After all, security is at the very top of the list for a quality child care experience, and all of us want our children to grow up in safe and secure surrounding!

What is an IP camera?

What is an IP camera, and what are the main differences between an IP camera and a CCTV camera?

IP camera, or Internet Protocol camera is also called Network Camera, and they are widely used for residential and commercial purposes, offering the user high quality.

IP camera needs a static IP address for the router and other network devices to identify and connect with it. In case of a dynamic IP address that keeps changing randomly every time the camera is connected to the network, a fixed URL via Dynamic Domain Name Service (DDNS) must be set up.

While CCTV cameras transmit one-way analog data with the help of coaxial cable to the DVR, and then it is converted to digital data, IP cameras are able to send and receive, that is to stream digital video, PoE - a system that passes electrical power along with data on an Ethernet cable., and in this case there is no need in analog to digital conversion. IP cameras stream the video directly to the NVR, a Network Video Recorder. The main advantage of IP camera over CCTV is that the camera captures and delivers a higher quality video. Additionally, IP cameras capture a much wider field of view than comparable analog cameras. As a result, the cost of IP cameras is much higher than that of analog ones.

IP cameras either have wired or wireless connections, and are used both indoors and outdoors, during the day and at night.

There are two kinds of IP cameras:

Centralized IP cameras

These cameras require a central NVR to store the recording, handle video and alarm management.

Decentralized IP cameras

Decentralized IP cameras don’t need a central NVR, and the video is processed at the source, as the cameras have recording function built-in and can thus record directly to any standard storage media, such as SD cards, hard disc, or a server.

What is WDR - Wide Dynamic Range?

WDR is the abbreviation used for Wide Dynamic Range. WDR is the technology used on professional security cameras, where there is need to balance brighter and darker surveillance areas. WDR is actually the difference in lighting. It is clearly seen, when recording entrance, where bright outdoor light is merged with dim indoor light, or when the area has large glass windows. Cameras using Wide Dynamic Range technology are able to record clearer details in low light scene, while making sure that the highlights don't get blown-out, and as a result having natural looking shot.

WDR technology is commonly used in surveillance cameras and in some medical applications. In an area with extremely bright and dark parts or in back light situations when the light comes from the back of a person, standing in front of a big window, a camera without WDR would produce an image where objects in the dark areas are hardly visible. Wide dynamic range solves this issue by applying techniques such as using different exposures for different objects in a scene for making objects in both bright and dark areas more visible and clearer. 

At www.koacctv.com high quality professional security cameras with true WDR are offered to re-sellers and installers, some of the cameras You can find below.

Hikvision 2MP WDR Fixed Dome Network Camera

 3 Megapixel high-performance CMOS

Analog HD output, up to 3MP resolution

True Day/Night

OSD menu, DNR, Smart IR

True WDR, up to 120dB

EXIR technology, up to 20m IR distance

IP66 weatherproof

Up the Coax(HIKVISION-C)

• 3 Megapixel high-performance CMOS
• Analog HD output, up to 3MP resolution
• 2.8-12mm motorized vari-focal lens
• True Day/Night
• OSD menu, DNR, Smart IR
• True WDR, up to 120dB
• EXIR technology, up to 40m IR distance
• IP66 weatherproof
• Up the Coax(HIKVISION-C)

Hikvision 3MP WDR MVF EXIR Turret Camera DS-2CE56F7T-IT3ZB

Hikvision 4MP WDR Fixed Dome Network Camera

• 
  
• Up to 4 megapixel high resolution
• Full HD1080p video
• Dual video streams
• 2.8mm/4mm fixed lens
• 120dB Wide Dynamic Range
• 3D Digital Noise Reduction
• 3-axis adjustment
• DC12V & PoE
• Support H.264+
• Up to 30m IR range
• IP66 weather-proof protection
• IK08(-W model)/IK10(non -W model)