What is the difference between Standard Definition (SD) and High Definition (HD)?

Both standard and high definitions are digital formats. Standard definition (SD) format provides superior digital picture and sound on a widescreen (16:9) format and it’s considerably better quality than analogue. High definition (HD) television is an enhancement that provides more pixels per square inch than standard definition and shows much finer details.

SD digital TV broadcast resolution — 720 x 576 pixels

HD digital TV broadcast resolution — 1920 x 1080 pixels

MPEG4 H.264 as 2014 is the most commonly used compression standard for distribution of video content. If you are using an older TV and cannot watch the SBS HD channels (30, 31 and 32) on it, it is because the TV is only compatible with the older MPEG2 standard. The quickest and easiest way to resolve the issue is to install a digital set top box or, alternatively, upgrade the TV.