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Why IP Megapixel
Something about analogue CCTV System

For a couple decades ago, analogue CCTV system had been one of the most significant needs for video surveillance industries. The transformation of VCR to DVR had push the technology advancement of CCTV system moving a step forward by extend the recorded video data retrieval duration from few days to as much as few years.  

Anyway the dilemma caused by analogue CCTV system on low resolution images of object or other potentially incriminating evidence from analogue CCTV cameras have prevented successful investigations and convictions. Most of the time, the analogue CCTV camera with poor image quality don’t serve the purpose, the cameras are being simply used to do general observing instead of proper crime-fighting - even the cameras purposely placed in crime hotspots. We often read the police’s statement mentioned “the CCTV footage may not be of sufficient quality for police to use in criminal investigations.” Therefore it had been fall far short of what is required to ensure a meaningful strategic direction on having CCTV system.

What is the fact that leads to the underperformed condition by analogue CCTV system in video surveillance industry? Before we determine the answer, let’s interpret the characteristic of analogue CCTV system. A video clarity is greatly depends on how much pixel available in the video, which is the video resolution (Horizontal Resolution x Vertical Resolution). The video resolution of analogue CCTV system is limited by NTSC standards at 704 x 480 pixels and PAL standards at 704 x 576 pixels. Therefore the maximum limit of analogue resolution will be approximately 400,000 pixels or 0.4 megapixels. This is sufficient for general surveillance within the area which the camera is covered, but often unable to achieve forensic surveillance efficacy which insist on human face recognition as well as license plates. The main restraints of analogue camera are:

  • Low image quality in wide angle view
  • Narrow coverage when intent to achieve clear image
The introduction to IP Megapixel Video Surveillance System

Throughout these few years, the introduction of megapixel cameras have been one of most significant advancements for video surveillance industry and have permanently changed how professionals think about their video surveillance solutions.

IP megapixel video surveillance systems allow users to gain maximum benefit from high resolution cameras that can typically generate better quality of image than analogue camera. An IP megapixel camera is able to capture image at a resolution of 1 million pixels or more. We may see how the further benefits on IP megapixel video:

  1. Higher Video Resolution

    The standard resolution of Megapixel begin with 1.3MP which is 1280 x 1024, it will at least 4x higher than that of a traditional analogue CCTV camera. Higher resolution provides greater detail for better object and event identification.

    A 3 Megapixel IP camera will able to cover 3 lanes and capture 4 vehicle plates clearly

    An analogue camera can’t view any vehicle plate clearly, only can predict the vehicle plate in front

  2. Cost Effective Planning

    The increase of pixel means the wider coverage that megapixel camera able to handle. While comparing on the similar image sharpness, IP megapixel camera capable to cover few times wider area than how analogue camera can cover. Therefore, less number of camera will be deployed and indirectly had reduced the costing on infrastructure as well as amount of channel used in the NVR system.

    • A 2 Megapixel IP camera will deliver the coverage of 6 units analogue camera with VGA resolution at same image sharpness.

  3. Minimize Maintenance Workload

    The higher resolution the camera can produce, the lesser amount of camera will be deployed for a premises. Consequently, the effort to include for system maintenance will be reduce significantly. And since IP Megapixel camera is using network connection for video transmission to NVR.

    The Power over Ethernet (PoE) features available in most of the IP megapixel camera had offer a convenience option to plan the camera cabling smarter by connecting to nearest PoE Ethernet switch without additional power point and home-run cabling.

  4. Alternative for PTZ Camera

    Before the appearance of IP Megapixel camera, the role of video scanning on wide areas required a PTZ camera. Anyway, PTZ camera will leave a large unmonitored area while performing scanning on coverage area, as they sweep forwards and backwards across the area under surveillance.

    Megapixel technology provides the seamless wide area surveillance capabilities as PTZ cameras, while capturing the complete picture all the time. There might be some words claims that the sharpness are not as good as the optical zoom by PTZ camera but bear in mind, no blind spot occurred in IP Megapixel camera, yet deliver an digital zooming effect which are few times better than analogue camera could perform.