Analogue vs HD What's the difference?
Images are made up of pixels, a small dot or square of colour so in simple terms the more pixels an image has the more detailed the picture is, as this example below shows:
An image with just 100 pixels looks entirely different to an image with 100,000 pixels.
In one image you can see the face of the car thief; in the other image the face is entirely indistinguishable.
Imagine the high definition with over 2 million pixels. Many cheap analogue DVRS available record in what is known as CIF resolution and the higher end analogue models in 4CIF which is as it says is 4 times the quality of CIF. HD on the other hand records at a massive 20x the CIF quality, here are the actual facts below.
|Term||Pixels (W x H)||Total Pixels||Notes|
|QCIF||176 x 144||25,344||Quarter CIF – mainly for mobile phone monitoring|
|CIF||352 x 288||101,376||Low end analogue DVR|
|2CIF||704 x 288||202,752||Mid range analogue DVR|
|VGA||640 x 480||307,200||Standard VGA output|
|4CIF||704 x 576||405,504||Higher End Analogue DVR|
|D1||720 x 576||414,720||Higher End Analogue DVR|
|720p HD||1280 x 720||921,600||720p High Definition|
|960p HD||1280 x 960||1,228,800||960p High Definition (Sony specific HD standard)|
|1.3 MP||1280 x 1024||1,310,720||1 Megapixel – Some IP Systems|
|2 MP||1600 x 1200||1,920,000||1.9 Megapixel – Some IP Systems|
|1080p HD||1920 x 1080||2,073,600||1080p High Definition – alien TVI DVRs|
|3 MP||2048 x 1536||3,145,728||3 Megapixel – Some IP Systems|
|5 MP||2592 x 1944||5,038,848||5 Megapixel – Some IP Systems|