Re: IPTV?
>But, if you free up the frequencies used by TV and convert them for IP use, would that not provide faster than 3G coverage for the existing freeview channels to be streamed over?
For this argument to hold, firstly Freeview's radio usage must be significantly less efficient than 3G/4G/5G achieve and secondly the protocols used by Freeview over this carrier must be totally inefficient, so that by encapsulating/converting them to IP with all the additional addressing and routing overhead, a greater density of payload data can be achieved. Also we shouldn't forget about the back channel that IP requires which Freeview doesn't, whilst potentially small it still needs to be provided...
No whilst Freeview might benefit from advances in radio technology and compression to improve the effective volume of payload data it delivers over a given channel allocation, there is no way that IP could ever deliver the same volume of payload data over the same channel allocation - if there were, the constraints of the Freeview broadcast only system would permit the IP and other networking protocol header information to be stripped and so provide capacity for additional application traffic over and above what the IP service could provide...
What does make sense is to combine Freeview with 5G, so that instead of watching BBC1 say via the IP connection, the client tunes to the appropriate Freeview channel, only using the IP connection to grab the section of the program missed prior to tuning in, if the user wishes to start at the beginning or rewind.