We are in a HD age now.
Everything is better in higher definition and at higher resolution, right? Analog cameras have reached their peak long ago, and up until recently there was only one solution; which was to switch to a IP Based system with a Network Video Recorder(NVR). Now, for people that already had existing analog cctv camera systems, this meant replacing pretty much everything. You would need to replace the Digital Video Recorders(DVR) with NVRs, then you would need to have Cat5 pulled. Finally, after doing all that, you still had to replace ALL of your cameras! Yeah, its not the most ideal situation for most companies, and it is an expensive process to get rolling at first. But until recently, that was really the only choice left now that analog has reached its maximum potential quite a while ago. Well, there is some good news, you now have another choice other then switching to IP Cameras and NVRs! You can even use the existing Coax cable that is existing from the Analog DVR system!
We in the CCTV industry welcome you, HD-SDI.
First lets cover some bases about what exactly HD-SDI is. HD-SDI stands for High Definition Serial Digital Interface. HD SDI allows you to finally have megapixel cameras on a digital video recorder with full 1080p while using coax cable. As I mentioned earlier in the post, you no longer need to switch to NVRs and IP Cameras to move to mega pixel cameras now. Granted, you still need to switch out the analog DVR with a HD-SDI DVR, and the analog cameras to HD-SDI Cameras, but with using the existing cabling from a analog upgrade, you can save yourself a lot of labor time and cost. There are even hybrid HD-SDI DVRs now as well, where you can have both HD-SDI and analog combination. You will still have limits on how far your video on coax or RG59 will go (a little over 300 ft) without the need of a repeater. These new HD-SDI DVRs currently come in the same channel forms as past DVRs support 4,8 or 16 channels.
Because of the limit on the amount of cameras per DVR unit, this obviously won't be the best choice for all cctv solutions, which is the case for most cctv products. Every job is different, and if you are quoting for a customer who down the line pretty soon will need more then 16 cameras, your best bet may be to price for the NVR and IP Camera systems. To get the full benefit of these HD-SDI Cameras, you are going to want to use a nice 1080p monitor with HDMI cable connected to the output of the DVR display. Without a good monitor, you are selling yourself or the customers short, because it just won't be as good as it possibly can to the eye. Another great benefit to HD-SDI is there is no lag in the transmission and viewing of the camera feed. I'm sure you have noticed while working on a IP Camera system that there is a very small delay in the video feed.
In closing, I myself am very excited for the possibilities that HD-SDI systems bring to the table. There is a lot of potential of upgrading existing Analog CCTV systems, sales of the HD-SDI DVRs, or the Hybrid DVRs. It gives us more then one choice when chosing the types of system to install at a job when we absolutely need to go high def with megapixel cameras. So to shortly cap up, below is a small bulleted list of the advantages HD-SLI brings to the table:
- True 1080p HD Video
- No hassle of setting up with IPs
- No delay in the image transmission like there is with IP Cameras
- Clearest Day and Night camera shots
- Being able to use existing Coax or RG59 cable
Please feel free to leave comments and get a discussion going. I would love to hear what other system integrators have to say on this topic! Please check out my website at Security Now of Pennsauken New Jersey