This is just one of over seventy Media Asset Management (MAM) systems covered in the Media Asset Management Guide. Also see descriptions of the workflows.
AEM "unifies the former capabilities of both Adobe CQ and Adobe Scene7 to offer web content management and digital asset management with optimized multi-channel media delivery." Formerly Day Software's Communique, this system was acquired by Adobe in 2010, then it was rebranded Adobe CQ, then it became Adobe Experience Manager.
A chart of the supported formats is here.