Tech Tent 69: Going Live

Do streaming apps like Periscope and Meerkat present a copyright threat to traditional broadcasters and their exclusive shows? Also, Herman Narula of London-based startup Improbable on how he wants to make it easier to create virtual models of everything. We hear from Craig Shelburne of audio company Sonos on how his firm decided to take on the "patent trolls" and won. And Melanie Sevcenko reports on the popularity of online schooling in the US.

Presented by Rory Cellan-Jones, with special guest Blathnaid Healy, UK Editor of Mashable.