The 1seg protocol allows Japanese and Brazilian cellphones to show television.
There are many USB-stick 1seg tuners for sale, to watch TV on PC. Is any of them usable with Ubuntu?
1seg is better known as
You need to load the smsusb and smusbtv kernel modules (if they do not load automatically) and then use a program to scan for the available channels.
Look at http://www.dealextreme.com/ for available products.