CCTV Video Surveillance - HD

• Watch this video to see a comparison of analog CCTV standard definition vs HD video surveillance footage.
• This first video compares CCTV resolution to a 720p AHD camera.
• This next video compares a 1080p AHD CCTV camera to an analog CCTV camera.
• The resolution of the analog camera is 960 x 480.
• Watch to see what a difference the higher resolution makes when it comes to digitally zooming in for facial recognition.

HDCVI is a little different from other analog and HD type cameras. Unlike other variations, you'll find that in most cases, you'll need to be using solid copper RG59 Siamese cable. Why? Well, it's because HDCVI cameras are capable of transmitting video up to 1600 feet. Let that sink in for a moment. Gone are the days of being limited to runs up to 300 feet with standard analog and other HD cameras.

All of this being said, you still need to pay close attention to your power runs. While video can be transmitted over coax up to 1600 feet, your power cable is still going to be limited to 300 feet. You can augment this with higher voltage power supplies and converters but make sure you know what you're doing before you accidentally end up frying your cameras.

The standard copper clad RG59 cable will still work with HDCVI camera systems. If you go this route, you may experience video degradation. Up to about 250 feet, you shouldn't really notice any loss in image quality, but after that you'll notice a faded contrast, lines starting to form, and a shadowing effect. You'll never fully lose your video feed, but these negative effects will gradually get worse.

Using Cat5e cable with baluns is another option but it's limited. At only 25 feet, you begin to see the same loss in contrast. At 50 feet, lines, and shadowing start to appear. Like the copper clad RG59, you'll never fully lose your image, but it will continue to go down hill.

Cat6 cable, while thought to be the solution, is simply not. At just 50 feet, shadowing begins to show. At 100 feet, the shadowing becomes very obvious, and contrast begins to fade.

Be wary of using any factory/plug-and-play cable or companies selling complete HDCVI systems with this type of cable. At 25 feet, we've immediately seen a lost in contrast. At 50 feet, lines begin to form and shadowing becomes apparent. As it is in other cases, as distance continues to increase, so do the problems in the image. Be sure to read all about which type of cable to use with HDCVI and other HD over coax security cameras.

HD-TVI means High Definition Transport Video Interface, It is a DSP-TVI technology developed by Techpoint(2012), and the Chipset was sold to Intersil , Chinese manufacture, such as Hikvision, HanBang, put this technology into their new product.

Hanbang successfully developed the TVI solution, solved HD-SDI's previous problems. TVI can convert the digital signals to analog ones, it extends the transmission distance, reduces the total cost, and takes less storage capacity, HD-TVI is also based on coaxial cable, support HD video signal (1080P/720P), Audio signal, digital signal transmission.

Why HD-TVI ?
TVI comes from a US-based company that does not supply to only one manufacture, the chipset is open, not sealed, you can DIY your HD-TVI system with different brand. while HD-CVI, no matter camera or DVR, should be bought from original company or authorized company. Customers like to match their DVR&Camera with different brand, because wide choice may mean more cost saving. And the TVI price is close to 960H, people will like this kind of product.

An IP camera is a networked digital video camera that transmits data over a Fast Ethernet link. IP cameras (also called "network cameras") are most often used for IP surveillance, a digitized and networked version of closed-circuit television (CCTV).

Benefits of IP camera over analog technology include:

• Remote administration from any location.
• Digital zoom.
• The ability to easily send images and video anywhere with an Internet connection.
• Progressive scanning, which enables better quality images extracted from the video, especially for moving targets.
• Adjustable frame rates and resolution to meet specific needs.
• Two-way communication.
• The ability to send alerts if suspicious activity is detected.
• Lower cabling requirements.
• Support for intelligent video.
• Disadvantages of IP surveillance include greater complexity and bandwidth demands.
• One alternative for organizations with substantial investment in analog technology is to use a video server to, in effect, turn analog CCTV cameras to IP cameras.
• A video server is a small standalone server that converts analog signals to a digital format and provides the analog cameras with IP addresses.
• Nevertheless, because it offers much more sophisticated capabilities, IP surveillance is increasingly replacing analog CCTV.
• An industry report from International Data Corporation (IDC) predicts that shipments of IP cameras and related products will increase 45% between 2009 and 2013.