ISO ISO/IEC 14496-23

Abstract

This International Standard defines the Symbolic Music Representation technology. By capitalising the Symbolic Music Representation technology the acronym "SMR" has been derived. <br>A symbolic representation of music is a logical structure based on symbolic elements representing audiovisual events, the relationship between those events, and aspects related to how those events can be rendered and synchronized with other media types. <br>Many symbolic representations of music exist, including different styles of notation for chant, classical music, jazz and 20th-century styles; percussion notation; and simplified notations formats for children and vision-impaired readers. MPEG-4 SMR does not standardize one or more of these representations, but instead is an extensible language allowing those representations and many more which share a common underlying structure of music representation. <br>MPEG-4 SMR allows the synchronization of symbolic music elements with audiovisual events that existing standardized MPEG technology can represent and render. <br>The SMR technology is composed of different tools, which normative descriptions are in Clauses 7 to 12 <br>&#8212; <strong>SMR Bitstream</strong>: the syntax and semantics of the SMR bitstream. <br>&#8212; <strong>Symbolic Music Extensible Format (SM-XF)</strong>: the syntax and semantics of the SMR format. <br>&#8212; <strong>Symbolic Music Synchronization Information (SM-SI)</strong>: the syntax and semantics of the synchronisation Information between the SMR elements and the other audiovisual elements. <br>&#8212; <strong>Symbolic Music Formatting Language (SM-FL)</strong>: the syntax and semantics of the rendering rules that are applied to the SMR XML format for rendering. <br>&#8212; <strong>SMR Object Types for Profiles</strong>: the object types of SMR to be used for the definition of Profiles.