Posts Tagged ‘ Digital video files’



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.

facebooktwittergoogle_plusredditpinterestlinkedintumblrmail

Stand Alone DVR For Security Camera

Written By:
Wednesday, January 12th, 2011

When designing your own digital video security camera system, whether it is for residential or commercial use, it is important to make the right choice for the stand alone DVR for security camera. A stand alone DVR or Digital Video Recorder is basically the “brain” of the system that coordinates the functions of the component parts and provides for storage of the digital video files.

A stand alone DVR for security camera is preferable because it is a self-supportive unit that does not rely on any other additional component (such as a personal computer) and does not require an internet connection. A typical stand alone digital video security system contains one or more digital video cameras, the DVR with a Digital Signal Processor or DSP, and a monitor.

The stand alone system works with the stand alone DVR for security camera as the central unit of control. The digital video cameras capture light images, convert them into electronic data, convert the data to binary or digital form and send it to the DVR unit. The DSP in a stand alone DVR is a highly specialized computer processing chip that is made such that it is dedicated mainly toward processing digital data into digital video files. Once the DSP creates the digital video file it may be viewed instantly (live) on a connected monitor and/or saved on the DVR for archiving or later use.

One major advantage of using a stand alone DVR for security cameras is that the unit can be placed just about anywhere that power can be supplied to it. Also, there is no risk of computer virus or hacker interference since the internet is not required for the stand alone unit to operate.

The DVR itself is basically a very specific type of computer. The DSP receives the data from the digital video cameras and compiles the data into a digital video file (that can be copied and viewed on an ordinary computer as well as the unit’s monitor if attached). The DSP normally uses a COmpression/DECompression or CODEC utility to make the digital video file smaller without a significant loss in quality. Once the file is created, it is stored on the DVRs Hard Disk Drive or HDD.

The HDD of a DVR is the same type of HDD that is used in personal computers. Therefore, DVRs are able to reap the benefits of improvement of HDDs originally created for computers. When purchasing a stand alone DVR for security cameras, it is important to purchase the right size (storage capacity) HDD. Digital video files can be incredibly large and require vast amounts of storage space. That’s why the DSP employs the use of a CODEC. However, even then the file size can become quite large in a relatively small amount of time, especially if there are several cameras that are being recorded.

The DVR works by storing the digital files in a succession or series. The DVR continues saving the files until the HDD capacity is full. Once the HDD is full, the drive begins re-recording over the original file at the beginning. The larger the drive, the longer the time cycle before re-recording begins. Security Camera King offers HDDs for our DVRs as large as 8 Terabytes in capacity.

A stand alone DVR for security camera also can contain additional hardware devices that aid in storage and manipulation of digital video files. For example, many DVRs come with a USB port for connecting a USB thumb drive. Others may also offer the option of a CD/DVD writer. The thumb drive and CD/DVD writers can be used to copy portions of the digital video file to give to police, insurance companies, courts, etc. In addition, the digital video file stored on the DVRs HDD can be copied to DVDs to create a complete archive of all camera recordings.

In addition to creating and storing digital video files, the DVR can also provide the means for controlling the cameras. Some cameras have the ability to move horizontally or vertically to increase the field of vision or to optically enlarge an object. These functions are known as Pan-Tilt-Zoom or PTZ and the DVR often contains the programming necessary to control these functions.

Check out Security Camera King’s complete line of Elite and Ultimate stand alone DVRs for security cameras. Contact one of our security experts via Live Chat or Telephone if you have any additional questions or would like to make a purchase.

facebooktwittergoogle_plusredditpinterestlinkedintumblrmail