Digital TV on your PC
Definition of HD and SD tv
http://en.wikipedia.org/wiki/High-definition_television
http://en.wikipedia.org/wiki/Standard-definition_television
Useful links Discussion of various DBTV card brands, Operating system builds/front ends orientated towards mutimedia use and HTPC configurations
http://www.dba.org.au/ Basic overview of DTV in Australia, regional coverage maps, more orientated to set top box use
http://www.xpmediacentre.com.au/community/index.php Aus based forum with wealth of info on how to get the best from Microsoft's media orientated versions of XP & Vista
http://forums.dvbowners.com/index.php? Another Aus based forum with some good freeware apps for viewing, recording, scheduling
http://www.team-mediaportal.com/ Media Portal, open source front end for windows based machines. performs better than Microsoft media center editions in most instances (more tweaking /setup required)
http://www.mythtv.org/ Linux app which turns a computer with the necessary hardware into a digital TV viewer/video recorder & multimedia home entertainment center.