Posts Tagged ‘ Internet Security Camera’



Internet Security Video Camera

Written By:
Tuesday, October 18th, 2011

Thanks to the Internet, one of the most popular digital video camera security systems is the internet security video camera system.  This camera system is unique in that it utilizes the Internet as a medium for sending video images and remotely controlling the camera making accessibility nearly ubiquitous throughout the world.

There are a few variations on the theme on how these internet security video cameras and/or camera security systems operate, but the end product is the same.  A digital video file that can be viewed virtually anywhere there is broadband internet access and stored on a personal computer’s hard drive for later use or archiving.

A typical standalone digital video security system contains one or more digital video cameras, a Digital Video Recorder or DVR with a Digital Signal Processor or DSP, and a monitor.  The digital video cameras in these systems capture light images and transform them into electronic video images.  The camera normally contains an analog-to-digital processor chip as well as the camera’s own Digital Signal Processor or DSP that sends the video image data in binary or digital form to the DVR unit.

The DVR unit consists of three primary types of devices; the Hard Disk Drive (HDD), the DSP previously mentioned, and any additional peripheral type devices such as CD or DVD recorders to make portable copies of video files.  The digital signal comes from the camera via an RG-59 coaxial video transmission cable to the DVR unit.  Each individual camera must have its own cable run from the camera to the DVR unit.

When the data reaches the DVR unit the DSP processes the data, applies a COmpression/DECompression utility (or CODEC) that greatly compacts the information and reduces the final size of the digital video file.  The digital video files are then viewed on a monitor (live) and/or saved to the HDD for later use.

IP cameras security surveillance systems differ in that they normally connect to the Internet instead of using a video transmission cable to relay the camera data to the DVR unit.  Furthermore, IP (which stands for Internet Protocol ready) cameras do this normally by one of two methods; either the data is sent via a Cat 5 Ethernet cable to a router or modem or wirelessly to a wireless router or wireless modem.

Using the internet, especially the wireless technology, creates a great advantage for this system.  Once the signal makes it to an Internet connection the cameras can be viewed and/or controlled from anywhere in the world that broadband internet is accessible.  This includes working in tandem with devices such as a Personal Computer or Mac Computer, iPhones, iPads and the like, and many 3G and 4G smartphones.  Literally, you can see what is going on at home in Los Angeles when you are on business travel in Kansas City.

Another advantage of the IP cameras security surveillance system is the ability to use wireless internet technology.  This eliminates the need to run the RG-59 coaxial cable from each camera to the DVR unit, greatly reducing installation time and making the process a do-it-yourself project that is a snap.  Instead of cables the camera can send its video image wirelessly using WiFi.  Not only does this provide an avenue for transmitting, but it provides a direct connection to the Internet.

Internet security video cameras used for security surveillance are able to work by processing the video signal on board and sending it via the camera’s on board web server technology.  A variation on this theme is the IP DVR.  In this instance the standard cameras are used in conjunction with the DVR but the DVR has the IP capability and is connected to a router or modem.  The files are stored on the DVR units HDD but are accessible via the internet to the user.

On the receiving end of an IP camera security surveillance system that uses a personal computer the digital video files are stored on the computer’s HDD and viewed on the computer’s monitor.  Normally this system works in tandem with common internet browsers such as Internet Explorer, Safari, etc.  Installation setup normally consists of a self installing software CD so for many systems no prior computer networking knowledge is needed.

Security Camera King has a full line of Internet Security Video Cameras.  Contact one of our experts today if you are interested in purchasing an Internet security video camera.

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Internet Security Camera System

Written By:
Tuesday, May 17th, 2011

Nothing has more “global” access in the digital video security camera industry than an Internet security camera system.  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.

First, 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.  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 many monitors for surveillance purposes.

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 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.

An Internet security camera system is very similar to this type of 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.

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