DV
Some people seem to not understand the notion of Independence. All matters are subject to the legislation of the Independent state. An independent Scotland would be the subject of Westminster legislation enabling the split. In that legislation a massive list of organisations would be affected. The independence legislation passed by Westminster would become law in Scotland at separation. The new Parliament in Edinburgh would be at liberty to do whatever it wished in whatever spheres it wanted. Ofcom would be in time replaced with a new National regulator, with its own raft of legislation which would be enacted as considered appropriate.
I would imagine the SBC would be regulated by SCOFCOM so it's role and the replacement as considered appropriate of Channel 3, 4 and Five as PSBs with Scottish versions or new concepts would be performed over a number of months. It wouldn't be unreasonable (as in NI later this year for RTE1, RTE2 and TG4) for the BBC to be permitted to continue as a licenced service in Scotland, if the Scottish Government decided so.
I would imagine the SBC would be regulated by SCOFCOM so it's role and the replacement as considered appropriate of Channel 3, 4 and Five as PSBs with Scottish versions or new concepts would be performed over a number of months. It wouldn't be unreasonable (as in NI later this year for RTE1, RTE2 and TG4) for the BBC to be permitted to continue as a licenced service in Scotland, if the Scottish Government decided so.