IS
There's not really such a thing as traditional, the situation has evolved gradually throughout the years.
Looking at http://www.obs.es/olympicbroadcastinghistory.html
domestic host broadcasters were used until 1992 when it was decided that the host did not need to come from the country concerned. In 2002 the IOC took responsibility for finding the host broadcaster for 2002 and 2004 and chose a private company to do it.
In 2001 they formed OBS and they took over the job from Beijing onwards - in Beijing it was called BOB, looks like London is OBSL and Vancouver it's OBSV
Yes, BOB was the last of the (traditional?) host broadcasters set up for each games.
There's not really such a thing as traditional, the situation has evolved gradually throughout the years.
Looking at http://www.obs.es/olympicbroadcastinghistory.html
domestic host broadcasters were used until 1992 when it was decided that the host did not need to come from the country concerned. In 2002 the IOC took responsibility for finding the host broadcaster for 2002 and 2004 and chose a private company to do it.
In 2001 they formed OBS and they took over the job from Beijing onwards - in Beijing it was called BOB, looks like London is OBSL and Vancouver it's OBSV