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  Top » Catalog » CDS » CCTV Education » What is D1? DCIF? 4CIF?
What is D1? DCIF? 4CIF?

What is D1? DCIF? 4CIF?

There is some confusion in the naming of high-quality video resolutions used by several video surveillance systems on the market. This confusion has allowed less-than- scrupulous system designers to fool unsuspecting customers.

Allow me to dispel a specific misconception (these numbers are for NTSC video, not PAL; PAL has similar differences):

1 - D1 is not the same as 4CIF

    D1 is 720x480 pixels
    4CIF is 704x480 pixels

2 - DCIF is not the same as 4CIF

    DCIF is 528x320 pixels
    4CIF is 704x480 pixels

    Specifically, DCIF is the same number of pixels (168,960) as 2CIF, but 2CIF is stretched horizontally.

OK, let's review:

    D1 is 720x480 pixels
    4CIF is 704x480 pixels
    DCIF is 528x320 pixels
    2CIF is 704x240 pixels
    CIF is 352x240 pixels
    QCIF is 176x120 pixels

Xcif_graphic

Ambush DVRs do not do D1. NEITHER DO ANY OTHER DVRs BASED ON THE SAME H.264 ENCODER HARDWARE!

Check the docs, Dear Customer, and if it doesn't spell it out, don't buy it or MAKE THEM spell it out for you.

And as for you unscrupulous competitors out there: You Will Be Found Out. It's not the 16 pixels that matters — its the technical chops to know the difference and the moral fortitude to not take advantage of the those who depend on our technical expertise.

For an independent 3rd party information source covering these facts, please refer to: http://en.wikipedia.org/wiki/List_of_common_resolutions

 

 

 

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