Posts Tagged ‘ wireless ip security camera’



IP Security Camera

Written By:
Thursday, December 29th, 2011

Nothing has more “global” access in the digital video security camera industry than an IP (Internet Protocol) security camera.  These cameras use the Internet as the means for their transmissions so anyone with a broadband Internet connection and a computer can access these cameras. The outreach available for use and/or monitoring has been extended even further with the increased technology in cell phones, namely 3G and 4G broadband Internet access.  In the following article we’ll take a look at some Internet security camera systems and how they work.

How a Non-IP Camera System Works

How a Non-IP Camera System WorksFirst, let’s make sure we understand how a “non-Internet” security camera system works.   In this type of system, digital video security and surveillance cameras capture video footage and send the video data to the Digital Video Recorder or DVR via a closed circuit made up cable, usually RG-59 coaxial cable or CAT5 Ethernet cable.  There are wireless systems also.

The wireless system consists of an antenna and transmitter built into the camera.  The receiver is usually located near the DVR and is attached to it by the cable mentioned above.  This is still considered a closed circuit television system because even though the camera is transmitting its signal wirelessly in is done on a private, specified frequency.

The DVR stores the video on a hard disk drive (HDD) just like the HDD found in a personal computer.  In addition the DVR may also display the video in real-time (live) on one to several monitors for surveillance purposes.  Some IP security cameras also offer the capability of storing video footage locally on the camera.  A miniature DVR of sorts is built into the camer so that footage can be saved locally on portable memory/storage media such as an SD card.

The digital video camera is responsible for capturing a light image and transforming it into an electronic image.  It does this by using a lens to focus what can be a large field of vision onto a small electronic sensor which usually ranges in size from only 1/4 inch to 1/2 inch square.

One of two different sensor chips is used for this purpose.  They are the Charged Coupled Device or CCD and the Complementary Metal Oxide Semiconductor or CMOS. When light strikes these sensors they emit electrical charges which can be measured and used to create a video image.  The data that is created by these chips is actually analog in form until it passes through an analog-to-digital converter chip.  Another highly specialized electronic chip called a Digital Signal Processor or DSP insures the integrity of the data and may make any corrections that are necessary.

At this point, the camera passes the digital data along to the Digital Video Recorder or DVR whose job is to record the data and store it as mentioned above.  It does this by compressing the file into a fraction of its original size but still managing to maintain a high quality.  It does this by using a COmpression/DECompression or CODEC utility.

How an IP Camera System Works

IP Security CameraAn Internet security camera system is very similar to the above system, however once the data becomes digital, it opens up a whole new world of possibilities, especially including the use of the Internet.  There are basically two types of Internet security camera systems.  One system consists of cameras that are Internet compatible also called Internet Protocol ready or IP ready.  The other system consists of a DVR that has its own Web server technology and is called IP ready as well.

IP ready cameras contain their own web server technology so that they maybe connected to the Internet.  Instead of sending their digital data directly to a DVR, they send their data via the Internet to anywhere there is a client that wants to access the information.  Generally these cameras use two CODECs at once.  Many of the cameras pass the information on to the DVR using the MJPEG CODEC while streaming the information via the Internet for live viewing using the latest CODEC, H.264.

These cameras may direct their video via the Internet to a specific type of DVR that is designed for this purpose which is called a Network Video Recorder or NVR.  One of the advantages of this system is that multiple cameras in multiple locations can be recorded by the NVR.  These locations can be widespread, such as two or more commercial facilities that are located in two different cities.  An Internet security camera system of this type can lend itself to all sorts of networking possibilities.

Another type of Internet security camera system exists where the DVR is the IP ready device and it takes care of all Internet related inquiries.  In this system, the cameras are not IP ready and they send all of their digital data to the DVR.  The DVR then contains its own Web server technology and allows a client access to the system through the DVR.  All of Security Camera King’s featured DVRs have these feature built in to the DVR.

This internet security camera system records the video locally on the DVRs HDD, but it allows a user to control the DVR and in many instances, even the cameras (for example, PTZ movements) remotely.  As a matter of fact, these systems can ever be monitored and controlled using a smartphone and 3G or 4G Internet technology.

Additionally, the IP Camera/DVR can be set up to send alerts if the camera includes (and most do) motion detection.  Specifically, the user can have emails sent to then upon a variety of different triggers.

Wireless IP Security Cameras

In addition to using the Internet as the vehicle for delivering the digital data to its final destination, the wireless IP security camera may have the capable of connecting to the Internet wirelessly.  Although non-IP wireless cameras can be wireless as well, their wireless architecture is limited to a couple of different methods while the IP security system has the same wireless architecture but may have a few extra methods that only the IP camera can utilize.

Most wireless non-IP security cameras use a couple of different specific methods for transmitting their data.  Probably one of the most often used methods is the 2.4 or 5.8 GHz transmission method.  Some also use the 900 MHz technology, although as technology increases, there seems to be less of a tendency for using the 9000 MHz technology.

The 2.4 or 5.8 GHz technology boosts ranges possible of up to 5 miles Line Of Sight or LOS.   LOS means that the manufactures specification for range in length is dependent on objects that could impede the signal.  LOS means that the range is directly from camera transmitter to receiver, although this is an ideal situation and seldom does it ever really exist.  As a matter of fact if something does impede the LOS it usually reduces the range but does not entirely disable the wireless signal.  In fact, it usually just decreases the length of the range based on the material involved such as trees, walls, buildings, glass, etc.

Wireless IP security cameras on the other hand use a different mechanism for wireless transmission; normally wireless Internet known as WiFi.  WiFi is basically a brand name for products using the IEEE 802.11 standards.  Typically, wireless IP security cameras using WiFi have about a 65 foot maximum “hot-spot” to connect to their wireless router or modem that receives the WiFi signal.

Benefits and Differences of IP security Cameras

First and foremost IP network security cameras are capable of producing video at an extremely higher resolution than standard non-IP systems.  The highest resolution non-IP camera can record with a maximum regulation known as “D1″ which is 720 x 480 pixels.  A 3 megapixel IP security camera can record at a resolution equal to 2048 x 1536 pixels; this is about 9 times greater detail than D1.

Equally amazing is another benefit involving networking.  Non-IP cameras send their signals to a DVR.  IP cameras send their signals to an NVR or Network Video Recorder.  So what’s the difference?  Non-IP cameras are normally located in one general geographical area, i.e. the digital video cameras in a department store connected to a DVR in the stores office.

As mentioned above, IP cameras use NVRs instead.  Most IP cameras can be located anywhere you want to put them (geographically speaking) and although they are in totally different locations they can all be routed to the NVR via the Internet.  In other words, you may own three small convenient stores in a city.  If each convenient store has IP cameras, their video signals can be sent to somewhere not even connected with the geographical area of the cameras such as a home, home office, or office location.

IP cameras are available in a myriad of types sizes and functions.  Security Camera King currently offers 3 different cameras:  1. 3 Megapixel IP Network Box Security Camera Product # IPBC-EL3MP; 2. 3 Megapixel IR Vandal Dome IP Security Camera Product # IPVD-EL#MPIR; and, 3. 18 x 1.3 Megapixel IP Network PTZ Security Camera Product # IPPTZ-EL13mpl18x.

 

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Wireless IP Security Camera

Written By:
Tuesday, January 25th, 2011

One of the more recent digital video security camera system components is the wireless IP security camera. These cameras use the Internet as a network medium for the purpose of transmitting their digital video images and for allowing the user to control the camera remotely. This places the maximum power of remote accessibility as well as easy installation in the hands of the user.

It seems as if all of our electronic devices today utilize or have some sort of affiliation with, the Internet. So why shouldn’t the digital video security industry take advantage of its seemingly ubiquitous presence and cost-efficient use as well? That’s exactly what a wireless IP (Internet Protocol ready) security camera does.

By using a wireless IP security camera you can monitor your business in Ft. Lauderdale while on vacation in Tokyo. If you have a Pan-Tilt-Zoom or PTZ wireless IP security camera you can even control the camera from Tokyo moving the camera horizontally, vertically, or even zooming in on an object. You can do all this anywhere there is a broadband Internet connection and an available desktop or laptop computer and even using a 3G or 4G smartphone.

How is this possible? In the following article we’ll discuss what’s inside a wireless IP security camera and how it works, especially with the internet.

A wireless IP security camera differs from a typical digital video camera in several ways. First, a standard digital video security camera is connected to a processing and storage unit called a Digital Video Recorder or DVR. The camera is normally connected to the unit by running an RG-59 coaxial video transmission cable from each camera to the DVR. The camera transmits its video data over the cable to the DVR where it is compiled into a digital video file that is stored on a hard disk drive and may be viewed live on a digital camera security monitor at the same time.

On the other hand, a wireless IP security camera doesn’t use an RG-59 coaxial video transmission cable or any other video transmission cable. This camera has a built-in transmitter that sends its signal using IEEE802.11 or WiFi radio technology. The camera may or may not, depending on the type, also process the video data into a digital video file before being transmitted from the camera. In addition, when the signal leaves a wireless IP security camera it may be sent to an IP ready DVR over the internet, or it can be sent to any other receiving device (such as a computer or smartphone).

A wireless IP security camera also has its own built in web server technology. This allows one camera to capture video, create digital video files, and send them (using streaming technology) over the Internet to a variety of devices already mentioned. Accessing the camera is as easy as opening a standard web browser on your computer and entering the camera’s Internet address and a password. Even smartphones and similar devices such as iPhone, iPod Touch, iPad, Android, Symbian, and Windows mobile phones can remotely view and control the camera as well.

It’s important to note that a wireless IP security camera and an IP DVR system are different. The IP security camera makes a direct connection to the Internet via a wireless broadband modem or router. An IP DVR system on the other hand uses various wireless technologies to connect the cameras to the DVR FIRST. The DVR is than connected to the Internet via a variety of broadband Internet connections.

Note: For IP DVRs smartphones will require an application (app). For the iPhone and similar devices the application is available for free from the iPhone App Store on your phone. For all other types, Security Camera King offers the app for free when you download it from their website. As an additional note, please remember that the app only works with Security Camera Kings Elite Mini, Elite, and Ultimate DVRs with HDMI output. It will not work with any other type of DVR or any of Security Camera Kings DVRs.

Ultimately then, a wireless IP security camera can use the Internet to send digital video images to a variety of computers and smartphones or it can utilize the Internet as a network medium to connect several cameras to an IP ready DVR.

If you have any additional questions about a wireless IP security camera contact one of our security experts via “Live Chat” or telephone today.

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