What is a DVR and how does it work?
A DVR is an abbreviation for Digital Video Recorder. There are many types of DVR systems available in the security industry however, few live up to expectations. DVR units are available in 4, 8 & 16 camera channels (up to 32 channels in the PC type systems) so it’s wise to select the correct DVR for your immediate and future needs with rock solid backup and support and free firmware/software upgrades.
H.264 is the latest video compression standard albeit Hidden Camera Surveillance has been using this technology for many years mainly in larger enterprise PC based systems. The same technology has now made it’s way into the smaller stand alone DVR market. If you had purchased an MJPEG or MPEG4 DVR system within the past few years, then that compression standard is already out of date. If you are not happy with your existing DVR system, think about a "retrofit" in other words simply replace the old with new. H.264 delivers a significantly higher quality of video recording with virtually no ghosting or interlacing typically associated with MPEG4. The difference between the two standards is most noticeable when playing back a MOVING OBJECT video recording as H.264 delivers much higher quality. H.264 also uses up to 30% less HDD space compared MPEG4 and with a superior compression, faster streaming over LAN & Internet, look no further. If you are looking for the latest in DVR technology don’t settle for anything less.
A DVR system is a non-stop recording tool. Whilst it may seem complicated, there are many similarities to a DVD player/recorder, including a remote control. Inside we pre-install Hard Drive (HDD) normally from 500GB to 1TB or more. The larger the HDD size, the longer the recording capacity. To conserve HDD space and for instant event playback, most users will set Motion Detection (MD) recording to all cameras. MD means whenever any person or object moves past 1 or more cameras, the DVR will record the event to HDD. The recording duration, amount of MD and recording quality settings, will all play a role in how fast the DVR HDD capacity is consumed. However, the DVR can be set to constantly record ay number of cameras whilst non critical cameras can be set to MD. By setting RECYCLE MODE on the DVR, when the HDD is full it will auto over-write the earliest recordings first. In other words the DVR system WILL NOT delete everything on the HDD. Depending on DVR settings and HDD capacity normally the user can expect a month or more of recording always on hand so there is no need to ever be concerned about running out of HDD space. Larger DVR systems will accommodate multiple HDD's.
Other than the immediate security and legal liability aspects surrounding this high quality security system, one of the main advantages is the ability to remotely access the cameras and DVR system features and functions from any other PC in the world. So without actually being on-site as such, a user may have complete access (name and password access controlled) to the DVR from basically anywhere. Access means a live view of all cameras connected to the DVR system, control of PTZ and zoom cameras, access to DVR features and functions and the option to play back recordings remotely. Tantamount to having the DVR in front of you even when not on site.