CCTV Security Camera News in Da Nang Vietnam

HD vs Megapixel – What’s the Difference?

When a customer inquires about a high definition or megapixel security camera you must be able to define the difference and provide the best possible solutions for each application. What is HD? What are megapixels?


Let’s start with the basics. SD (standard definition) consists of 704 pixels with 480 lines of resolution and is the standard resolution that TVs have used until the introduction of HD or high definition. High definition displays consist of at least one million pixels. Note that I said at least one million pixels, meaning that a high definition image could contain more than a million pixels. HD images use an aspect ratio of 16:9.

Next we’ll discuss megapixels. A megapixel security camera is capable of producing an image with at least one million pixels or more. Most consumers would assume that HD and megapixel cameras are the same since they both use an identical number of pixels to produce an image. However, one main variable that sets the two apart would be the size of the image. While HD images use the 16:9 widescreen aspect ratio, megapixel security cameras produce images in a 4:3 aspect ratio. One similarity with both types of cameras is that they use the same video compression, which is H.264.

Ultimately, knowing the differences and similarities of these types of cameras can make or break a sales pitch. Customers want to be well informed and expect you as the salesman to be knowledgeable.