CCTV security systems HD-CVI stands for High DefinitionComposite Video Interface. This is a brand new technology in the securitycamera industry that provides a different method of transmitting video signalsover coaxial cables. Until this new technology surfaced, analog CCTV video waslimited to 960h video resolution. 960h resolution refers to the 30% increase inhorizontal resolution, so the maximum analog resolution up to this point was960 x 480 pixels. This has been the accepted limit to analog video transmissionfor many years. In order to achieve greater transmission would mean switchingto digital video using either HD-SDI (High Definition Serial Digital Interface)or Network IP video formats.
Enter HD-CVI, a true alternative to Network IP solutions.HD-CVI uses a licensed video transmitter and receiver that is able to transmitup to 1080p video resolution (1920 x 1080) in an uncompressed format over thesame standard coaxial cable that is used for standard CCTV cameras. Thisuncompressed video format is able to transmit over longer distances than eitherHD-SDI or Network IP cameras and without the latency and bandwidth issues thatare so common. Additionally, HD-CVI is able to transmit video, audio andcontrol (OSD or PTZ) over a single coaxial cable instead of requiring separatecables for each transmission.
What is really separating this technology from the rest ofthe options for video transmission is the cost effectiveness of HD-CVI. In mostcases HD-CVI is around the same price as the older analog CCTV technology andis far less expensive than HD-SDI or IP Network transmission.
CCTV cameras are limited to 960h resolution which is 960 x480 pixels. HD-CVI cameras can transmit up to 1080p resolution (2 Megapixel)which is 1920 x 1080 pixels. HD-CVI is capable of up to 450% great resolutionand detail than standard CCTV cameras and DVRs.
CCTV can only transmit video over the single coaxial cable.Audio and control must be run over separate cables. HD-CVI can transmit video,audio and control over a single cable saving money and time.
The price point of analog CCTV and HD-CVI is about the same.You get more resolution for the money with HD-CVI.
There are some benefits to IP cameras over HD-CVI camerasthat should be considered as well:
CCTV security systems cameras are capable of higher resolution than 1080p and the available resolutions will continue to grow in the future.
IP cameras are capable of POE power so you can transmit bothpower and video on a single ethernet cable if using a POE camera and a POEswitch.
An IP camera is a network device itself so it can functionwithout the need for a network video recorder.
If there is an existing network infrastructure and availablenetwork bandwidth is not an issue, it can be easier to add additional IPcameras to an existing network.
Rhodium security camera systems is one of the pioneers ofHD-CVI technology so if you are considering this technology we are the expertsin the industry. This technology should be considered if you wish to upgrade anexisting CCTV camera system to megapixel quality video. By simply replacing theexisting analog cameras and the DVR with our cost effective HD-CVI cameras andDVR you will instantly upgrade your system to megapixel quality video producingan increase of up to 450% in resolution! There should be no need to replace theexisting cable infrastructure which is usually the most expensive portion ofthe installation.
If you are considering a new security camera system, we highly recommend our HD-CVI systems since it will cost around the same as the analog CCTV security systems installed today. It can provide you with the same resolution as most IP Network camera systems for a fraction of the cost and without the bandwidth and latency issues experienced with network cameras.
If cost is not a factor at all, then we recommend youseriously consider an all IP network camera system since the ethernet cableinfrastructure can be used over again in the future to upgrade your cameras ashigher resolution cameras become more available. Keep in mind that IP camerasystems usually require network expertise to ensure that you have adequatebandwidth available inside the network and to ensure that the network camerasystem does not negatively impact your existing network infrastructure.
Requirements for an HD CVI security camera system:
When planning the installation of a HD CVI surveillancesystem, make sure to consider all the parts that will be needed.
You will need to select your cable infrastructure:
The best choice for HD CVI video transmission is highquality RG6 or RG59. Most professional security system installers will choseSiamese cable since that will include both RG59 for video, audio and controltransmission and 18 gauge power wire for power transmission in a single run. Wehave tested both copper core coax cable and CCA (Copper Clad Aluminum) Coaxcable and both have performed well.
You can use CAT5 or CAT6 cable with the same video balunsyou use for analog CCTV cameras. This infrastructure does perform well, but thequality of the video is slightly degraded. It is still a dramatic increase inresolution over the analog CCTV camera resolution. Most people will never noticethe difference in video quality. We estimate the degradation in quality to bearound 5-10%.
We have tested prefabricate plug and play cables. Again, theresolution is excellent, but the video quality is also slightly degraded. Thereis around the same 5-10% degradation, again barely noticeable to most people.
You will need to select your connectors:
The most popular connectors are BNC Twist on connectorsbecause no tools are necessary. These will work fine.
BNC compression connectors is what most professional CCTV installers will use for the cable connection. This is also what we recommend.
BNC Crimp Ons are also popular and will perform very well.
Select your power source:
HD CVI can be powered the same way as analog CCTV cameras.Most HD CVI cameras will require either 12V DC or 24V AC power. You can choosefrom various power distribution boxes or easy plug in power transformers.
Select your recording DVR (Digital Video Recorder)
You will not be able to use your existing DVR (Digital VideoRecorder) with the HD CVI cameras. Like HD-SDI and Network IP camera systemsyou will need to select an HD CVI DVR in order to be able to record your HD CVIcameras. We offer a wide range of HD-CVI DVRs and in most cases, the HD CVIDVRs are the same price of even less expensive than their equal standard CCTVDVR or NVR and they are less expensive than most HD SDI DVRs.