SDTV

Standard definition is the current television display resolution as analogue television and DVDs; it supports both 4:3 and 16:9 widescreen. To receive digital signals, most TVs require installing a separate digital Set-top-box. However, some TV with built-in digital tuners, so do not require an external set-top box.

HDTV

High definition  is the enhanced version of SDTV; at the moment each broadcaster is broadcasting 20 hours of HDTV per week. All HD programs are produced and shown in widescreen formats.

It has the highest TV picture quality available; the resolution can be up to 3 times that of SDTV. It is particularly suited to large screen TV displays. It can offer a 5.1 surround sound where this sound track is available.

Display Resolutions

The resolution type SD 576i is the almost the same as traditional CRT TV. (575i) while it is the same as DVD resolution. There are three different HDTV standards in Australia. The lowest is 576p; the next is 720p Quasi. The highest resolution standard is 1080i, which has a resolution of 1920 x 1080 and is in ‘interlaced’ mode.

To watch HD pictures, not only HD Set-top-box is needed, but also a HD resolution display is also required.

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