IEC 62481-4 Ed. 1.0 b:2014

IEC 62481-4:2014 describes the set of guidelines based on DLNA DRM Interoperability Solutions (DIS), which are defined as methods to enable the secure transfer and use of protected commercial content among different implementations on network media devices. This content could be protected by different content protection technologies. In this standard they are referred to as DRMs.