Video cameras have been a luxury item that families and individuals have enjoyed for the past few decades. The ability to capture special moments via audio and video recordings has changed the way many people view life and the recollection of memories. The evolution of this electronic wonder has progressed from basic black and white moving pictures on film, to the digital transference of color video to a hard disk or hard drive. Digital video recording (DVR) cameras are the newest and most user-friendly version of recording technology, and they have altered the market forever.
History
In 1999, Dish Network revealed a piece of hardware that was essentially a prototype for what digital video recording would soon become. This new technology enabled a user to digitally record what was on television and store it onto a hard drive inside the cable box, which then inspired a wave of new products incorporating the same technology, including mini-DVR hand-held camcorders, TiVo, security systems and even cell phones. Since the DVR outbreak, the market has been saturated with all sorts of digital technology that allows even the most basic user to record anything desired to a digitized video.
Capturing Video
In modern civilization, most people are aware of the invention known as the camera. A person points the camera at what he wants a picture of and then presses a button that triggers the capture of a single image. With DVR cameras, the camera captures a succession of images one at a time and then sequences them in chronological order, thereby creating a moving picture. These images are transferred from light that enters through the lens into information that goes to tiny circuit boards through a device known as an "electronic image sensor". This sensor converts an optical image into an electric signal, which is then broken down into code based on specific colors and tones.
Storing Video
The code converted from the electric signal is run through several filters that separate the colors, and balance the light and dark tones. After the image is converted, it is immediately sent to the camera's "buffer memory". The buffer memory is a temporary storage unit that processes the information until it becomes a complete image. The buffer slowly fills up with all the information and when it is full, it sends the information to the DVR camera's storage media.
Playback
One of the main differences between modern DVR cameras and the traditional film cameras is that the images are automatically developed. Because DVR camera videos are stored electronically and do not require a transfer to film, no manual development is required. Within seconds of the image capture, the recordings can be called up and played back. The user can then select a video file and watch it on the camera's viewing screen. DVR cameras allow the user to scroll through files that have been stored over the course of days, weeks, months or years, depending on the amount of media the camera's storage unit will hold.
Transferring Video to Other Media
Because the video images are stored electronically, it is much easier to transfer the captured video to alternate media. Most DVR cameras are equipped with a USB port that allows the user to easily send the video to a computer or other electronic device, upload it to an Internet database or transfer it to a device that can record the video onto tape. This technology enables a virtually limitless amount of options for storing, replaying and editing any captured video.
Closed Circuit TV
Closed Circuit TV (CCTV) is another form of DVR camera technology that is used in security systems. The cameras record video and then transmit it to a monitor system and/or video storage receiver. CCTV cameras can be purchased with different frame-by-frame functions in which they capture video every few seconds, or they capture more images per second creating a smoother video. Some CCTV systems record in both color and black and white, while others only record in black and white. Some other systems even have a night vision function available for heightened security. The CCTV systems are major leaps in digital video recording due to the fact that for the first time in history, security cameras can be wireless, allowing for more options regarding placement of the DVR cameras. This then means better security for your business, or your home.
Use Dvr Spy Camera To Counteract The Crime As Well As Physical Violence In The Home.
There are numerous alternatives when you find yourself looking to buy a dvr spy camera. You can find a hidden camera dvr in glasses or just about whatever else your heart and soul may perhaps crave for.
The purposes of spy surveillance cameras may vary dramatically. Folks have been proven to use a hidden camera dvr to be able to record cheating, horrible nannies, untrustworthy employees, and much more.
Let me reveal a story how a dvr spy camera preserved a business individual from going out of business.
This business proprietor kept seeing things coming up missing within the stockroom. He had a video security system to view over the shop, but nevertheless assumed that simply because his company was small and he knew all his workers he did not desire one to closely monitor the stockroom.
Considering he given up plenty of products on hand he could not afford to add to the security system he had and thus he procured a wall clock dvr spy camera to set into the stock room. As soon as leaving the hidden camera dvr to record overnight he found the cause. He had found that the managers child had taken her keys and had all of them duplicated and was coming in at hours of darkness and taking everything he desired.
This is just one of the utilization's wherein spy surveillance cameras avoided thieves as well as saved an entrepreneur from going bankrupt. Spy surveillance cameras have been known to inhibit infidelity, kid abuse, family assault, and perhaps burglary. A dvr spy camera will surely have much more uses that you could use to impede crime from occurring, or maybe when it is already presenting itself. You are going to be better equipped to handle the problem.
Here are a few benefits of spy surveillance cameras.
A hidden camera dvr will be much more cost effective when compared with an expert security camera system. They will range from one hundred to five hundred dollars as opposed to a total system that should cost from one thousand to five thousand dollars.
A dvr spy camera bears integrated video recording so there is little need to spend money on an electronic video recorder for you to acquire the video.
You can view the video out of spy surveillance cameras in anything that you can actually plug a memory reader in. Then you will have versatility in looking at the video captured on the hidden camera dvr.
The final benefit of a dvr spy camera I will explain about is the facility that spy surveillance cameras of this category are generally far easier to conceal, thus making it easier to monitor any situation with no need of the surveillance camera getting compromised. These particular features create one very effective solution to make you, your own home, and your relatives quite more secure.
DVR and Security Camera Systems
What is the relationship between a DVR and security camera systems? Is DVR necessary in a security camera system? What kinds of DVRs are there? Are there substitutes for DVRs? What is a DVR anyway?
Let’s examine a basic digital video security camera system and how it operates. Afterwards, we’ll be able to answer some of the specific questions related to the DVR and security camera systems.
A basic digital video security camera system is a component system that consists of three major components:
1) One to many cameras;
2) A DVR or Digital Video Recorder; and,
3) A monitor or monitors
The system operates in the following manner. The digital video camera converts light energy into electrical energy which can be measured and is used to create digital video data. This data is sent to the DVR. As previously mentioned, the DVR is a digital video recorder, just like the hard disk drive or HDD of a personal computer. However, in security camera systems, the DVR normally contains a processor, just like the processor in a Personal Computer or PC.
However, the processor in a DVR is a highly specialized piece of electronic circuitry. Unlike the PC processor, the security camera DVR processor is manufactured to handle specific functions of security camera systems such as digital video file production, camera control, and recording of digital video files. It uses a specific utility called a COmpression/DECompression or CODEC program to process the digital video file from the digital video data sent to it by the video camera.
Digital video is basically nothing more than a series of rapid digital photographs taken in rapid succession. Typically, high quality digital video is about 30 digital photographs taken within on second, also referred to as 30 frames per second or 30 fps. When you think of the file size from just one high quality digital photograph, you can imagine how enormous a digital video file that takes 30 fps for 24 hours could be.
That’s why the DVR’s processor uses a CODEC to create the digital video file. It uses special programming that shrinks the size of the file without sacrificing the high quality of the image. CODECS change from time to time as different approaches and technologies make each CODEC better and more efficient. One of the most popular and recent CODECs is called the H.264 CODEC.
The DVR and security camera system create, process, and store digital video files that can be viewed instantly (live) on monitors or stored for later viewing on monitors or for archiving. Many DVRs also have additional storage options such as CD/DVD writers or USB Flash drive connectivity to copy portions of video to portable media. This may be necessary to give insurance companies, police departments, as evidence, etc.
The DVR may also contain other specialized features. One common feature of many modern DVRs is internet connectivity. The DVR may contain its own web server technology and programming so that it may be connected to any broadband internet service and instantly become accessible anywhere in the world there is broadband internet accessibility.
Most DVR and security camera systems come in 4, 8, or 16 channels. This means that the DVR can handle 4, 8, or 16 separate camera inputs at one time. Security systems requiring more than 16 cameras simply use additional DVRs to expand the number of cameras needed.
Highly specialized security cameras may have highly specialized DVRs. Portable systems, systems that are used for a small amount of time, systems that have self contained cameras and DVRs all in one unit may utilize different digital storage methods for the DVR. For example school bus DVR and security camera systems often use a Compact Flash Card or similar portable storage medium instead of a full sized hard disk drive as the DVR.
Is a DVR necessary in a security camera system? No, not necessarily, but a system with just a monitor and no DVR will not be able to record the video so that it may be reproduced for later use. A baby monitor is usually a good example of this. On the other hand, a retail store facility would not realize the full potential of protection without a DVR and security camera system.
Other DVR and security camera systems functions pertaining to the DVR may include audio recording, various output display resolutions as well as connectors, remote control, e-mail and smartphone notification, and mouse and/or keyboard control.
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