ASPEN is a video over IP system that builds on a proprietary system created by Evertz. It is based on using separate MPEG transport streams to carry video and audio, encapsulated in IP packets. Aspen includes mapping of uncompressed video into MPEG transport stream as well as supporting mezzanine compression. The Aspen Community promotes its use across a range of manufactures. It is published as SMPTE RDD-37 (Registered Disclosure Document).