Posts Tagged ‘ 8 channel system’



DVR Security System Cameras

Written By:
Friday, May 6th, 2011

Today’s Digital Video Recorder or DVR security camera systems are an amazing bundle of new high quality technology.  The security camera industry can also thank the personal computer industry as a contributor, because a lot of today’s DVR security camera systems use recently invented technology borrowed from the computer industry.

In this article we are going to describe how a typical DVR security camera system works.

Modern digital video security and surveillance systems are basically component systems.  This means that essentially, the parts of the system are like plug n play items used in computers.  All of the components do not have to be made by one manufacturer, they can differ in function and still work on the system, and they can usually be removed and replaced with something else and the system will continue to work.

This provides tremendous versatility in application because the DVR security camera systems are no longer required to use all of the same components.  For example, an 8 channel system may have 6 bullet cameras and 2 Pan-Tilt-Zoom (PTZ) camera made by a totally different manufacturer.

 

Let’s take a closer look at how a DVR security camera system (and its individual components) works.  The first component of the system is the camera.  There are so many different type of cameras available today that we do not have the space for this article to cover them all.  Instead, let look at how they work

DVR security cameras possess one primary function; transfer the reflecting light that is in its field of vision into electrical impulses that can be measured, manipulated, and compiled to create a digital video file.  This information is then sent to the DVR and/or monitor for processing and viewing.

The camera does this by using one of two different electronic sensor chips called a Charged Coupled Device or CCD or a Complementary Metal Oxide Semiconductor or CMOS.  Although both sensors work a little differently, the both yield the same end product–the electrical data that can be used to create a digital video file.

This is accomplished by the camera’s lens focusing the field of view onto one of these chips, which generally range from only 1/4″ to 1/2″ square.  When the light strikes the sensor chip, small electrical impulses are created by the pixels in the chip.  Each one can be measured and used to create the data that will be used to display the cameras field of view as a digital video.

At this point the signal is still an analog type signal.  The camera sends this analog data through an analog-to-digital processor chip to convert the data into digital or binary format.  The camera also contains a Digital Signal Processor or DSP chip that is used to make fine adjustments to the data.  Once the digital information is ready it is sent via a video transmission cable or other means to the DVR, hence the name DVR security camera systems.

Once the signal reaches the DVR, it applies its own DSP technology along with a CODEC utility.  Codec is an acronym for COmpression/DECompression.  This utility program uses a special algorithm program that reduces the incredibly large file into just a fraction of its original size without sacrificing significant quality.  Once this is accomplished the digital video file is compiled and is saved on the DVR’s hard disk drive and/or displayed on a system monitor.

It should be easy to see now why DVR security camera systems benefit from technological improvement in the computer world.  Many PC based devices are used in security camera systems.  For example, the DVR saves the digital video file to its hard disk drive for storage.  USB Thumb drives can be used to update firmware and copy and transfer video footage.  DSP and memory chips are directly related to the computer industry.

Even the monitors used today are basically the same as computer monitors but they may include a few extra input options.  Monitors have gone from the bulky Cathode Ray Tube (CRT) type to the LCD type just like most computer monitors.

Security Camera King offers a wide selection of DVR security camera systems with everything you need to install it but the tools.  Try one of our systems, the Elite Mini Economy, the Elite Mini HD, the Elite Series, or the Ultimate Series and see for yourself.  The majority of our cameras come with a 1 year full warranty (some models have 2 years) and our DVRS have a 3 year warranty.

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DVR Security Camera systems

Written By:
Friday, May 6th, 2011

Today’s Digital Video Recorder or DVR security camera systems are an amazing bundle of new high quality technology.  The security camera industry can also thank the personal computer industry as a contributor, because a lot of today’s DVR security camera systems use recently invented technology borrowed from the computer industry.

In this article we are going to describe how a typical DVR security camera system works.

Modern digital video security and surveillance systems are basically component systems.  This means that essentially, the parts of the system are like plug n play items used in computers.  All of the components do not have to be made by one manufacturer, they can differ in function and still work on the system, and they can usually be removed and replaced with something else and the system will continue to work.

This provides tremendous versatility in application because the DVR security camera systems are no longer required to use all of the same components.  For example, an 8 channel system may have 6 bullet cameras and 2 Pan-Tilt-Zoom (PTZ) camera made by a totally different manufacturer.

 

Let’s take a closer look at how a DVR security camera system (and its individual components) works.  The first component of the system is the camera.  There are so many different type of cameras available today that we do not have the space for this article to cover them all.  Instead, let look at how they work

DVR security cameras possess one primary function; transfer the reflecting light that is in its field of vision into electrical impulses that can be measured, manipulated, and compiled to create a digital video file.  This information is then sent to the DVR and/or monitor for processing and viewing.

The camera does this by using one of two different electronic sensor chips called a Charged Coupled Device or CCD or a Complementary Metal Oxide Semiconductor or CMOS.  Although both sensors work a little differently, the both yield the same end product–the electrical data that can be used to create a digital video file.

This is accomplished by the camera’s lens focusing the field of view onto one of these chips, which generally range from only 1/4″ to 1/2″ square.  When the light strikes the sensor chip, small electrical impulses are created by the pixels in the chip.  Each one can be measured and used to create the data that will be used to display the cameras field of view as a digital video.

At this point the signal is still an analog type signal.  The camera sends this analog data through an analog-to-digital processor chip to convert the data into digital or binary format.  The camera also contains a Digital Signal Processor or DSP chip that is used to make fine adjustments to the data.  Once the digital information is ready it is sent via a video transmission cable or other means to the DVR, hence the name DVR security camera systems.

Once the signal reaches the DVR, it applies its own DSP technology along with a CODEC utility.  Codec is an acronym for COmpression/DECompression.  This utility program uses a special algorithm program that reduces the incredibly large file into just a fraction of its original size without sacrificing significant quality.  Once this is accomplished the digital video file is compiled and is saved on the DVR’s hard disk drive and/or displayed on a system monitor.

It should be easy to see now why DVR security camera systems benefit from technological improvement in the computer world.  Many PC based devices are used in security camera systems.  For example, the DVR saves the digital video file to its hard disk drive for storage.  USB Thumb drives can be used to update firmware and copy and transfer video footage.  DSP and memory chips are directly related to the computer industry.

Even the monitors used today are basically the same as computer monitors but they may include a few extra input options.  Monitors have gone from the bulky Cathode Ray Tube (CRT) type to the LCD type just like most computer monitors.

Security Camera King offers a wide selection of DVR security camera systems with everything you need to install it but the tools.  Try one of our systems, the Elite Mini Economy, the Elite Mini HD, the Elite Series, or the Ultimate Series and see for yourself.  The majority of our cameras come with a 1 year full warranty (some models have 2 years) and our DVRS have a 3 year warranty.

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8 Camera Outdoor DVR System with DVD Burner

Written By:
Monday, May 3rd, 2010

The 8 camera outdoor DVR system with DVD burner is a popular security system choice for applications requiring durable day and/or night outdoor security and surveillance. There are many things to consider when purchasing an 8 camera outdoor DVR system with DVD burner so let’s examine a few.

First, the 8 camera outdoor DVR system with DVD burner may also be referred to as an 8 channel outdoor DVR system with DVD burner. Usually, security camera systems refer to each camera as a “channel” hence the terms 8 channel system, 8 channel receiver, and so forth.

The cameras must be an outdoor rated type. This means it can withstand the forces of nature including extended inclement weather. Cameras of this type are normally rated as IP66 or IP67. This rating is the Ingress Protection rating based on an international electrical standard that specifies what the camera is protected against. The first digit following the IP, in this case “6,” means the camera is dust tight, that no dust can enter the casing or components of the camera. The second digit refers to the protection against water. A rating of “6” means the camera is protected from ingress of powerful water jets and a rating of “7” means the camera could be submerged in water up to 1 meter in depth.

Generally, outdoor cameras will be either night/day vision cameras or infrared (IR) cameras. Night/day vision cameras have a sensitive CCD sensor that can produce images in very low light conditions. Infrared cameras contain a series of IR emitting LEDs that surround the camera lens to illuminate otherwise dark or no light conditions. IR illumination is invisible to the human eye however the camera’s CCD sensor can detect IR radiation. Therefore, the LEDs work like invisible lighting, flooding the absolutely dark target area with a beam of light undetectable to the human eye.

Also, an 8 camera outdoor DVR system with DVD burner may utilize wireless camera technology. This means that the cameras transmit their image to a receiver using either the 2.8 GHz or 5.8 GHz band without the need for transmission cables. This can be incredibly beneficial in placing cameras in locations that are difficult to reach using cables or in concealed areas. A wireless 8 camera outdoor DVR system will also need an 8 channel receiver.

Regardless of the type of camera, this system will also include a Digital Video Recorder or DVR. The DVR is basically the same device as the hard drive in a personal computer. Once the camera has transmitted the signal to the system, the DVR stores the images or video in a file on the hard drive. Generally, an 8 camera outdoor DVR system with DVD burner will require a high speed DVR along with some sort of compression technology.

Since 8 cameras are producing video at once, the incredibly large file size of the digital video would exhaust the useful space of even the largest capacity DVRs. So, file compression technology, software or hard-wired circuit boards, are used to compress the file size while maintaining the image quality while maximizing hard drive capacity. The DVR saves the image until the disk is filled and when it reaches its capacity, the DVR continues recording over previously saved data.

One of the benefits of an 8 camera outdoor DVR system with DVD is the DVD recorder itself. These systems normally contain on-board or internal DVD writers. These are excellent for backing up image files. When a DVR is getting full, a DVD can be burned for archiving purposes before the DVR begins to re-write itself. Also, another added benefit of a DVD writer is to produce back-ups or copies of certain image “footage” to provide to police departments or when needed as evidence.

Understanding the options available for an 8 camera outdoor DVR system with DVD recorder will help you make an educated, useful purchase that will fulfill your security and surveillance needs.

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