Three licensors of the Via LA HEVC Patent Pool (M&K Holdings, Gensquare, and Tagivan II) have filed a patent infringement suit against Microsoft in the Landgericht Duesseldorf court in Germany, alleging unlicensed use of High Efficiency Video Coding (HEVC) technology in several Microsoft products. In this interview with Streaming Learning Center's Jan Ozer, patent attorney Gottfried Schull, who is representing Via LA HEVC, discusses what's at issue in the lawsuit.