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Published in:
Introduction to Media Synchronization (MediaSync) Read chapter Read first chapter

2018 | OriginalPaper | Chapter

14. Specifying Intermedia Synchronization with a Domain-Specific Language: The Nested Context Language (NCL)

Authors : Marcio Ferreira Moreno, Romualdo M. de R. Costa, Marcelo F. Moreno

Published in: MediaSync

Publisher: Springer International Publishing

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Abstract

This chapter reports on the intermedia synchronization features of Nested Context Language (NCL), an XML-based domain-specific language (DSL) to support declarative specification of hypermedia applications. NCL takes media synchronization as a core aspect for the specification of hypermedia applications. Interestingly, NCL deals with media synchronization in a broad sense, by allowing for a uniform declaration of spatiotemporal relationships where user interactivity is included as a particular case. Following the W3C trends in modular XML specifications, NCL has been specified in a modular way, aiming at combining its modules into language profiles. Among the main NCL profiles are those targeting the domain of Digital TV (DTV) applications. Indeed, NCL and its standardized player named Ginga are part of ITU-T Recommendations for IPTV, Integrated Broadcast–Broadband (IBB) and DTV services, and Integrated Services Digital Broadcasting—Terrestrial (ISDB-T) International standards. This chapter discusses the main reasons that make NCL a comprehensive solution for the authoring of interactive multimedia applications. It also discusses the aspects of its conceptual model, the Nested Context Model (NCM), which defines an intrinsic support for easily specifying spatiotemporal synchronization among components (e.g., media and input assets).

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previous chapter SMIL: Synchronized Multimedia Integration Language
next chapter Time and Timing Within MPEG Standards
Footnotes
1
NCM uses the definition of event as stated in the Pérez-Luque and Little work [13]: An event is an occurrence in time that may be instantaneous or may extend over a time interval.
 
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Metadata
Title
Specifying Intermedia Synchronization with a Domain-Specific Language: The Nested Context Language (NCL)
Authors
Marcio Ferreira Moreno
Romualdo M. de R. Costa
Marcelo F. Moreno
Copyright Year
2018
Book
MediaSync

Print ISBN: 978-3-319-65839-1

Electronic ISBN: 978-3-319-65840-7

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-65840-7_14