We are often asked by clients about the difference between HD and SD Video Production, so I thought I might have a go at trying to break it down. The differences come down to two things, Aspect ratio and resolution. Resolution refers to the total number of pixels displayed. Aspect ratio refers to the relative height and width of the display. Here is a comparison between the two:
1. Standard Definition uses an native aspect ratio of 4:3 and is 640 pixels wide by 482 pixels high, for a total number of 308, 480 pixels.
2. High Definition uses an native aspect ratio of 16:9 (commonly referred to as wide-screen) and is 1920 pixels wide by 1080 pixels high, for a total number of 2,073,600 pixels.
Simply Put, High Definition gives more than 6x the detail of standard video.