I understand that you want to know what do you need in order to stream the HD signal to your computer.
First, you need a to check and verify that the network (on both ends) meet the requirements for the HD streaming. You will be able to find this information checking the following link.
Then, you need a HD set top box and the Slingbox PRO HD. We encourage you to check this link in order to get all the information about the Slingbox PRO HD.