| Nested context language (NCL) and Ginga-NCL |
Recommendation ITU-T H.761 gives the specification of the nested context language (NCL) and of an NCL presentation engine called Ginga-NCL to provide interoperability and harmonization among IPTV multimedia application frameworks.
NCL is a glue language that holds media objects together in multimedia presentations, no matter which object types they are. As an example, NCL treats an HTML document as one of its possible media objects. In this way, NCL does not substitute, but embed, XHTML-based documents. The same reasoning applies to other media content and multimedia content objects, and also to objects with content coded in any computer language. Ginga-NCL is an NCL presentation engine built as a component of a DTV middleware. A very special NCL object type defined in Ginga-NCL is NCLua, an imperative media-object with Lua code.
This Recommendation includes an electronic attachment containing NCL 3.0 module schemas used in the Enhanced DTV profile. |
|
| Citation: |
https://handle.itu.int/11.1002/1000/11307 |
| Series title: |
H series: Audiovisual and multimedia systems
H.700-H.799: IPTV multimedia services and applications for IPTV
H.760-H.769: IPTV multimedia application frameworks |
| Approval date: |
2011-06-13 |
| Provisional name: | H.IPTV-MAFR.9 |
| Approval process: | AAP |
|
Status: |
Superseded |
|
Maintenance responsibility: |
ITU-T Study Group 16 |
|
Further details: |
Patent statement(s)
Development history
|
|
|
|
|
|
ITU-T Supplement
|
Title
|
Status
|
Summary
|
Table of contents
|
Download
|
|
H Suppl. 6 (04/2006)
|
Control load quantum for decomposed gateways
|
In force
|
here
|
here
|
here
|
|
H Suppl. 9 (05/2008)
|
Gateway control protocol: Operation of H.248 with H.225.0, SIP, and ISUP in support of emergency telecommunications service (ETS)/international emergency preference scheme (IEPS)
|
In force
|
here
|
here
|
here
|
|
H Suppl. 11 (02/2009)
|
Analysis of class-based home network QoS solutions
|
In force
|
here
|
here
|
here
|
|
H Suppl. 12 (11/2013)
|
Gateway control protocol: Priority traffic treatment by ITU-T H.248 gateways
|
In force
|
here
|
here
|
here
|
|
H Suppl. 13 (10/2015)
|
Gateway control protocol: Common ITU-T H.248 terminology - Release 2
|
In force
|
here
|
here
|
here
|
|
H Suppl. 14 (10/2015)
|
Gateway control protocol: SDP codepoints for gateway control - Release 2
|
In force
|
here
|
here
|
here
|
|
H Suppl. 15 (01/2017)
|
Conversion and coding practices for HDR/WCG Y'CbCr 4:2:0 video with PQ transfer characteristics
|
In force
|
here
|
here
|
here
|
|
H Suppl. 17 (11/2014)
|
Guide for addressing accessibility in standards
|
In force
|
here
|
here
|
here
|
|
H Suppl. 18 (10/2017)
|
Signalling, backward compatibility and display adaptation for HDR/WCG video coding
|
In force
|
here
|
here
|
here
|
|
H Suppl. 19 (04/2021)
|
Usage of video signal type code points
|
In force
|
here
|
here
|
here
|
|
Click
here
to download all the modules of this Recommendation (zipped archive)
|
|
Click here to download all the modules needed to compile this Recommendation (zipped archive)
|
| Title |
Approved on |
Download |
|
Testing of personal audio systems for compliance with ITU-T H.870 (2018)
|
2021
|
here
|
|
Media coding toolbox for IPTV: Audio and video codecs
|
2016
|
here
|
|
IPTV Green Book
|
2015
|
here
|
|
Glossary and terminology of IP-based TV-related multimedia services
|
2014
|
here
|
|
Conformance testing specification for H.761
|
2012
|
here
|
|
Delivery and control protocols handled by IPTV terminal devices
|
2011
|
here
|
|
Telecommunications Accessibility Checklist
|
2006
|
here
|
|
