you first should have A DVB Card or known as " Satellite Card "
Second You Should Use Programes Like ProgDVB , DVBDream or DVB Viewer or what ever you want .
Search for A Plugin To Stream To Internet ... I think ProgDVB have a program to doing That .
Then Start your Streaming TV Site .
P.S. You Should Have At Least 3 MB Upload Speed To be Able to stream the normal Channels .. For HD I think At Least 8 MB