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IndigoVision IP Cameras

IP Video FAQs

Here are answers to some of the more common IP Video questions:

Why IP Video?

IP (Internet Protocol) Video frees you from the limitations of CCTV (Closed Circuit TeleVision) wiring. With CCTV systems, all wiring must be run to a common point to redirect the camera video signals to viewing monitors and DVRs (Digital Video Recorder). IP Video is OCTV (Open Circuit TeleVision) with no wiring limitations. You can have an unlimited number of viewing locations & recording devices anywhere in the world!

Why not use a WebCam?

Webcams and Internet Cameras are very inexpensive ways to convert camera video to IP Video. These units do a very poor job of video compression and can be unusable over many Internet connections. IndigoVision IP Video uses H.264 & MPEG-4 compression with bandwidth limiting algorithms. IndigoVision was used at the last 3 Olympic Games and is the only product that we use over broadband wireless systems. Other IP Video products demand up to 8 times the bandwidth required by IndigoVision!

Why not use a DVR?

A DVR (Digital Video Recorder) is a computer that is limited by its internal processor and memory. DVR's have specifications indicating how many frames (fps), images (ips) or pictures (pps) per second that can be recorded. If you have a 16 channel DVR that records at 120fps or 120ips or 120pps, you are limited to an average of 7.5fps per channel. IndigoVision IP Video encoders process the video at each camera allowing for a full 30 frames per second (what your eye sees as natural) at 4SIF resolution.

SIF, 2SIF & 4SIF Resolution

SIF (Source Input Format) refers to the level of picture resolution in NTSC (National Television Systems Committee).

  • 1SIF resolution creates a picture by using color pixels in a matrix of 352 x 240
  • 2SIF resolution creates a picture by using color pixels in a matrix of 704 x 240
  • 4SIF resolution creates a picture by using color pixels in a matrix of 720 x 480

What is TVL?

TVL is a horizontal measurement of detail from a scene that can be resolved on a display. This number relates the resolvable fine detail to an equivalent number of equally spaced black and white vertical lines across the width of the viewing screen. A common misconception of the term TVL is that it relates to the number of video lines on the screen.


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