The advent of CCTV security cameras happened 30 years back and since then there have been plenty of changes in the technology that is being utilized to upgrade the system. Like the other industries, the end user requirements are driving the changes in the CCTV industry.
To meet the ever-increasing demands of the end users, the security camera industry has experienced a lot of technological shifts. One such latest shift in technology is from analog CCTV surveillance to fully digital surveillance system, which is network-based. While buying security cameras, it is essential to make a thorough research without believing in myths or false claims made by companies like Genetec.
The security systems, which earlier ran on analog-based systems, are now completely transforming to digital. Today’s security cameras use PCs and servers to record and transmit the data, whereas the analog-based security cameras used VCR for recording and storing the videos.
VCR-Based Analog CCTV System
This was supposedly the first generation security systems where the analog tube cameras were connected to the VCR for video recording. Each security camera required its own coax cable to connect the security camera with VCR. Later, time lapse mode was introduced to this analog security system to make the VCR tape last longer for better proficiency.
DVR-Based Analog System
The first revolution in the surveillance industry occurred with the introduction of DVR-based analog security cameras. Hard drives had finally replaced the VCR recording system by then. As the hard disk space was limited, the recording duration was limited to low frame rate. Over a course of time, the cost of hard disk dramatically reduced and compression algorithms such as MPEG-4 came into play. One of the best advantages of DVR systems was that there were no tapes and tape changes and one could easily search through recorded video.
Network DVR-Based Analog System
DVRs were equipped with the Ethernet port for network connectivity. The network-based DVR analog systems have enabled remote video monitoring using personal computers. They require either special Windows client or standard web browser to monitor the video.
Video Encoder-Based Network Video System
In this surveillance system, videos used to be recorded on an open platform, a video server. Normally, the video encoder connected to analog cameras digitized and compressed the videos. This was a true network-based surveillance system where the digitization and compression were done by the encoder and recording by the server.
Network Camera-Based Surveillance System
The latest kid on the block is supposedly IP-based surveillance system, where the images and videos are captured and digitized inside the camera. They provide consistent high image quality. One benefit of this IP-based surveillance system is that you can use this for more than just transporting the video. These cameras can be configured remotely and data can be transmitted over the network without any data loss.
This is how the basic security cameras evolved massively over time and now they are rendering high-quality services to the intended users. Currently, IP-based cameras are the key drivers in network video revolution. They surpass the analog-based security systems in many important areas like quality, image resolution, and in-built intelligence.