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What is a P-Iris?

18th May 2009

What is a P-Iris?

Note: IP camera lens technology has moved on since the publication of this article. However, P-Iris lenses remain in use. P-iris is an automa…
Using H.264 video compression in IP video surveillance systems

3rd Apr 2009

Using H.264 video compression in IP video surveillance systems

H.264 is an open video compression standard. Uniquely, H.264 is the first compression format to be formed by collaboration between members of both…
Glossary:  Complementary Metal Oxide Semiconductor (CMOS) Sensor

15th Jan 2009

Glossary: Complementary Metal Oxide Semiconductor (CMOS) Sensor

A CMOS sensor, when applied to IP surveillance cameras, is a device which converts light energy into electrical voltages which can be read by an IP…
Glossary: JPEG

1st Dec 2008

Glossary: JPEG

A JPEG is a way of storing images on a digital device such as IP CCTV cameras, digital cameras and mobile phones. JPEG is a compressed image format…
Glossary: MJPEG

1st Dec 2008

Glossary: MJPEG

MJPEG is short for Motion-JPEG which is a means of storing video footage from IP cameras and digital camcorders. An MJPEG Movie consists of m…
Glossary: Tampering Alarm

24th Oct 2008

Glossary: Tampering Alarm

The Tampering Alarm is an intelligent feature found on IP CCTV cameras which have a strong focus on security, such as tamper/vandal resistant IP ca…
Glossary: Network Video Recorder (NVR)

20th Oct 2008

Glossary: Network Video Recorder (NVR)

A  Network Video Recorder (NVR) is a digital device which sits on your IP CCTV network to receive live image/video streams and record them d…
Glossary: Power over Ethernet Midspan

30th Sep 2008

Glossary: Power over Ethernet Midspan

When used in conjunction with Power over Ethernet compatible equipment such as an IP CCTV security camera, a midspan is the device used to combine…
Glossary: IP camera ports

30th Sep 2008

Glossary: IP camera ports

Note: NW no longer recommends the use of port forwarding, except in certain specific scenarios where it may be required and where other security mi…
Glossary: Automatic Gain Control (AGC)

26th Sep 2008

Glossary: Automatic Gain Control (AGC)

In low-light conditions, some IP security cameras use Automatic Gain Control (AGC) to artificially improve their "dynamic range" and produce usable…
Glossary: Progressive Scan

17th Sep 2008

Glossary: Progressive Scan

Progressive scan is a technology associated with an IP camera's imaging sensor and is used when transmitting, displaying or storing moving images.…
Glossary: High Power PoE (IEEE802.3at)

16th Sep 2008

Glossary: High Power PoE (IEEE802.3at)

Power over Ethernet (PoE) is a technology which allows IP cameras to be powered using the same standard Ethernet cable which carries the data conne…
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