As a CCTV (closed-circuit television) installer, you always need to buy the best cameras available in the shop. The modern trends in video products have influenced our client’s thought of security cameras.
Analog CCTV cameras have faded away from the market. In fact, I’d many difficulties in finding an analog CCTV camera for one of my clients. We’re Left with two choices, IP and hi-def.
IP cameras like AXIS come with fantastic resolution. But, the experience necessary to install them and the cost sometimes doesn’t suit our customers budget. If you’re upgrading an existing analog system, you can Have to rewire the entire place with CAT5 or CAT6. And that is an expensive option. Therefore, what are the other options?
Analog hi-def CCTV cameras. In latest days, the demand for analog hi-def has gone over the top. Many producers have started manufacturing analog hi-def CCTV cameras.
This article compares some of the analog hi-def technology available to us.
HD-SDI (High definition – serial digital interface)
The first to start hi-def in analog is HD SDI. HD SDI is able to produce full Hi-def or 1080 p resolution. Nevertheless, the high price and the compatibility of them pushed them to the last place.
Hi-def SDI was utilized in the past of camcorders. The only reason they weren’t introduced into CCTV cameras is due to the fact that they were very expensive.
HD-CVI (High definition composite video interface)
HD CVI or hi-def composite video interface is the most recent addition to the HD CCTV system. This technology is developed by Dahua. HD CVI technology is capable of transmitting a video signal via a coaxial cable to a maximum of 500 meters. That is a huge benefit over the past age analog cameras. high-definition CVI also executes it easy to send audio, video, and data with one an only coax cable. HD CVI has a nil delay and that is an extra clear benefit compared with IP technology.
HD-TVI (High definition transport video interface)
HD TVI was introduced in the year 2014. That is a DSP TVI technology produced by a US corporation named Techpoint. HD TVI chipset is utilized by Intersil, Hikvision, HanBang and a lot more.
When twisted cables are used, TVI clearly offers an edge in their operation over longer distances.
AHD (Analogue high definition)
AHD technology is developed by NextChip Korea. AHD supports 720p and 1080 p video resolutions. AHD technology also has cons and pros, AHD chipsets are usually the cheapest among Hi-def chipsets, hence the cost of the final product is slightly cheaper than HD TVI or HD CVI. It also supports audio over coaxial.