Posts Tagged ‘ standalone systems’



CCTV Digital Recorders

Written By:
Wednesday, January 26th, 2011

If you are considering the purchase of a security video system and are unsure as to whether you should purchase a DVR or a CCTV digital recorder, you MUST read this article. In the following text we’ll answer this question and many more about CCTV digital recorders and describe three of Security Camera King’s featured units.

So to answer the original question, DVR or CCTV digital recorder? The answer: They are both the same device; whether it’s called a DVR or CCTV digital recorder, it’s still the same piece of equipment. The terms may be confusing because of the evolution of the video security system.

Originally, video security camera systems were analog systems. The video camera was basically just a small version of a television studio camera that was used to record analog video. The term “CCTV” or Closed Circuit TeleVision was used to indicate the difference between a television studio camera that broadcasted its signal via OPEN radio signals to anyone that wanted to receive it and a video security camera that used a CLOSED circuit to send its signal to a designated device.

Analog systems used video recorders, but they recorded the signals using analog methods on tape, such as VHS or Beta. These analog system recorders were either referred to by the tape type designation or were simply called video recorders.

Current video security systems are digital systems. The recorders that are used in these systems are called Digital Video Recorders or DVRs. Basically the terms DVR, CCTV DVR, Digital Recorders, and CCTV Digital Recorders all refer to the same device, a digital video recorder.

There are several advantages to a digital system as compared to an analog system. CCTV digital recorders can instantly jump or skip to a specific time or date recording. Analog tapes had to played and searched while playing to find a specific segment. Digital recorders also save video in digital or binary format so there is no degradation of the quality of the recorded video over time.

About Security Camera King’s CCTV Digital Recorders
Security Camera King offers high-quality CCTV digital recorders that use the latest digital video technology, offer the most features, and use the latest, most efficient CODEC (more about CODECs in a minute). Our three featured CCTV digital recorders are the Elite Mini DVR, the Elite DVR, and the Ultimate DVR. Each of these units is available in four, eight, and sixteen channel units. (In this case “channel” means input or camera, so this is the number of individual cameras or inputs the DVR can handle.)

All three models of CCTV digital recorder use the H.264 CODEC. CODEC is an acronym for COmpression/DECompression. Digital video security systems create digital video files which consist of nothing more than several digital photographs taken in succession in a short period of time. High-quality fluid digital video is often taken at a rate of 29.9 pictures per second or frames per second or fps.

Consider the potential size of a file for one digital photograph; now imagine if you took 30 of these per second. In 60 seconds you would have an uncompressed digital file 1800 times the size of one picture. This size ratio is far too big for even the fastest processors to handle, so the CODEC is an algorithm that is used make this files much easier to handle and store by shrinking their size without sacrificing quality. The H.264 is the latest, most efficient digital video CODEC available.

All three of Security Camera King’s CCTV Digital Recorder models feature an embedded Linux operating system and Internet Protocol (IP) ready features that include internet networking, e-mail alert notification, and access via one of several varieties of smartphones. Our CCTV digital recorders are standalone systems; they can operate without the use of a personal computer (which could be vulnerable to viruses, hacking, and other invasions).

In addition, all of our featured CCTV digital recorders have HDMI, VGA, DNC video outputs with a display resolution of 720 P. This means that more than one monitor can be used with the unit at a time. In fact, with the included Matrix output you can pick and choose your monitor display options.

Our CCTV digital recorders are easy to setup and operate. Their software is a mouse-based point-and-click Graphical Users Interface with an On-Screen Display. The operation is so simple that there is even an included infrared remote control.

For additional information about our CCTV digital recorders, please contact one of our security experts.

facebooktwittergoogle_plusredditpinterestlinkedintumblrmail

Wireless PC Compatible Security Camera

Written By:
Thursday, January 6th, 2011

Nothing can offer you the peace of mind in security and the power and flexibility of application and use like a wireless PC compatible security camera. Thanks to modern electronic technology advancements and the growth of internet applications, a wireless PC compatible security camera is also reasonably priced to be affordable for just about any budget.

What exactly is a wireless PC compatible security camera and how does it work? We’ll attempt to answer these questions in the following article in order to give you a better understanding of the device and help you to decide if it is right for your security and monitoring application.

Before we talk about a wireless PC compatible security camera, let’s describe a basic standalone system first. A standard digital video security camera system usually consists of one or more digital video cameras, a Digital Video Recorder or DVR, and a monitor. The digital video cameras are connected to the DVR by a video transmission cable, usually RG-59 coaxial cable. A cable must be run from each camera to the DVR unit.

The camera(s) captures light images and converts them into electronic video images. It also converts the data created for this into digital or binary form using an on-board analog-to-digital processing chip. The digital data is sent to the DVR where a Digital Signal Processor or DSP, a highly specialized computer processor dedicated to making videos, uses the data to create a digital video file. The digital video file can be viewed in real-time (live) and/or saved on the DVR’s hard disk drive for later viewing, copying, etc.

A wireless PC compatible security camera captures the image and creates the digital video image in the same manner. However, it differs by transmitting the initial digital data from the camera wirelessly and by storing the data on a PC’s hard disk drive. Basically it eliminates the use of a standalone DVR and processor unit as well as a separate monitor. This has advantages and disadvantages that we will discuss later.

Most wireless PC compatible security cameras are their own little system. The camera captures the image, transfers it into digital form, creates a type of digital video file and then sends it via an on-board transmitter to a corresponding wireless internet connection such as a wireless router or wireless modem. The camera unit usually has its own IP address that identifies it on the Internet.

Using a common Internet browser, the user can access the secure camera with a username and password, and monitor as well as control some functions remotely from any personal computer, Mac computer, Apple iPhone, iPad, iPod Touch and even 3G and 4G smartphones. Some cameras have the ability to move horizontally and/or vertically to increase the range of the camera’s field of vision and may be able to enlarge objects in the field of vision. These cameras called Pan-Tilt-Zoom or PTZ cameras can be controlled remotely from a computer Internet browser as well.

These cameras normally use MPEG4 or MJPEG video compression to reduce the size of the digital video file to make it easier to send via the internet. Generally, you need not be an IT professional to install and operate these cameras. All you need to do for most wireless PC compatible security cameras is mount the camera and install some software from a CD onto your computer or download an application (app) to your smart phone and your ready to go.

These systems use the PC to replace the standalone DVR unit and monitor. If the user wants to record the video files for archiving or later viewing they can normally save them on their computer’s hard drive. If they choose to view them live, they can watch them on the computer’s monitor using most common internet browsers such as Internet Explorer, Firefox, etc.

As mentioned earlier, there are advantages and disadvantages to using wireless PC compatible security camera systems instead of standalone systems. Probably the greatest single advantage is lower cost due to the fact that a standalone DVR or monitor is not required as an existing personal computer can be used instead. Also, since the Internet is the medium for distributing the final video file, the cameras can be remotely accessed from anywhere in the world there is broadband internet access.

There are disadvantages. The system could be prone to computer viruses, Internet bog downs, and using so much of your personal computer’s resources that it effects the computer’s performance for doing other tasks.

facebooktwittergoogle_plusredditpinterestlinkedintumblrmail