Recommendation ITU-T H.761 gives the specification of the nested context language (NCL) and of an NCL presentation environment called Ginga-NCL to provide interoperability and harmonization among Internet protocol television (IPTV) multimedia application frameworks.NCL is a declarative glue language that holds media object presentations synchronized in time and space,no matter the types of the media objects.Ginga-NCL is an NCL presentation engine built as a component of a digital television (DTV) middleware.This Recommendation includes an electronic attachment containing NCL 3.1 module schemas used in the enhanced DTV profile.
ITU-T H.761-2014 Referenced Document
ITU-T H.222.0-2014 Information technology - Generic coding of moving pictures and associated audio information: Systems
ITU-T H.750-2008 High-level specification of metadata for IPTV services Study Group 16*， 2024-04-20 Update
ITU-T J.200-2010 Worldwide common core ? Application environment for digital interactive television services (Study Group 9)
ITU-T X.509-2012 Information technology – Open Systems Interconnection – The Directory: Public-key and attribute certificate frameworks (Study Group 17)
ITU-T Y.1901-2009 Requirements for the support of IPTV services Study Group 13
ITU-T H.761-2014 history
2014ITU-T H.761-2014 Nested context language (NCL) and Ginga-NCL (Study Group 16)
2011ITU-T H.761-2011 (Pre-Published) Nested context language (NCL) and Ginga-NCL