 Some output types such as S/PDIF (Sony/Philips Digital Interchange Format) typically don’t have a suitable DRM scheme available, so these need to be turned off reliably if the content so specifies.In Vista, the control of PC video outputs is provided by PVP-OPM, which is essentially the next generation of Certified Output Protection Protocol (COPP) introduced in Windows XP.However, rather than being a software application programming interface, PVP-OPM operates with the Windows media components in the protected environment.