What is an ip camera? Network ip? or Network camera? a brief description to potential buyers in Malaysia.

An Internet protocol camera, or IP camera, is a type of digital video camera commonly employed for surveillance, and which unlike analog closed circuit television (CCTV) cameras can send and receive data via a computer network and the Internet. Although most cameras that do this are webcams, the term "IP camera" is usually applied only to those used for surveillance.
There are two kinds of IP cameras:
  • Centralized IP cameras, which require a central Network Video Recorder (NVR) to handle the recording, video and alarm management.
  • Decentralized IP cameras, do not require a central Network Video Recorder (NVR), as the cameras have recording functionality built-in and can thus record directly to digital storage media, such asflash drives, hard disk drives or network attached storage.

The diagram explains how a IP (Internet Protocol) Network camera can be used in your Network. It is suitable for both Wired and Wireless(802.11G built in) Networks. If you have an existing network the system is simply plug and play.

The IP Camera can be connected directly to the Internet without using a computer. So when the power goes off and comes on your camera will automatically come online. No need to restart the Computer or the DVR manually.

Comparison between IP camera and Analog DVR (via analog camera)

IP Cameras
1.End to interlace problems
·         Interlaced scan
·         Each image formed from two interlace fields
·         Blurriness from capturing moving objects, even when connected to a DVR
·         Progressive Scan
·         Entire image captured at one time
·         Crystal clear images even with a high degree of motion in the scene
2.Megapixel resolution
  • Stuck with NTSC/PAL resolution
  • 0.4 Megapixel at 4CIF and 0.1 at CIF
  • Limited image details
  • Many resolutions
  • 1 Megapixel is 10x the resolution of CIF, 2 Megapixel is 20x!
  • Different aspect ratios
  • Digital PTZ
3.Integrated PTZ  and I/O control and storage
  • Analog cameras need separate Rs-485 cable and equipment(joystick) for control)
  • Costly and cumbersome
  • I/O only possible in DVR not on camera
  • Recording not possible onboard camera.So if DVR is shut all lost.
  • PTZ control over the same network
    that transports the video
  • PTZ commands sent over the IP network
  • Integrated I/O can
    • Trigger anything
    • Can be triggered by anything
  • Only possible with separate audio lines to the DVR
  • Audio captured at the camera
  • Synchronized with the video
  • Can be integrated into the same
    video stream
  • 2-way audio
    (Duplex, Half Duplex, Simplex)
5.Secure Communication
  • No encryption
  • Video encryption
  • Authentication using encrypted
  • Authorization: to verify and approve
    the identity of the device
  • Privacy watermarks
6.Flexible cost effective infrastructure
  • Expensive coax, proprietary fiber, wireless
  • Distance affects image quality
  • Adding power, I/O and audio further complicates this situation
·         IP = established, standardized,
·         Digital images = no quality reduction
·         Many streams transmitted over the
same line
·         A single network wire = hundreds of simultaneous full frame rate video streams
7.True Digital Solution
  • With every conversion image quality is lost:
    • Analog signal digitized in camera’s DSP
    • Analog signal converted back to analog for transport over coax
Signal once again digitized at the DVR for recording
  • Images digitized once
  • Stay digital
  • No unnecessary conversions
  • No image degradation
  • Not Available
  • Both network cameras with and without
    built-in support for PoE can take
    advantage of a UPS device
  • Cost savings
  • Reliability with centralized power backup
  • Simple installation

Example #1
Here is a comparison of screenshots taken from an analog camera and an HDTV IP camera.

The first image is an analog camera with 540 lines resolution. 

The second is the same shot but with an HDTV IP camera with 1280x800 resolution (720p). The camera used was an Axis P3344-VE 
Example #2 - This first shot taken with a color analog camera w/ 480 lines of resolution. 

This shot taken with a high resolution IP camera w/ 1280x1024 resolution - Camera used was an Axis M3204 

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