HOW TO NETWORK TV AND COMPUTER?

If you are interested in watching television programs on a computer this is possible with the right wired or wireless equipment installed. Some TV broadcasts are accessible directly via the Internet and no connection to a television is required. Those who own Digital Video Recorders (DVR) may also prefer to connect their computer to the DVR rather than the television directly.

For more :http://compnetworking.about.com/od/consumerelectronicsnetworks/a/connect-pc-tv.htm

Use HDMI port to connect TV and computer.

thru DVR

If you are asking to join TV and computer, then you can use HDMI port to have connection between them.

Use hdmi port to connect.