標準號：ISO/IEC 14496-23-2008
中文標準名稱：信息技術.音頻-可視對象的編碼.第23部分:音頻符號的表示法
英文標準名稱：Information technology - Coding of audio-visual objects - Part 23: Symbolic Music Representation
標準類型：L71
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：L71
國際標準分類號：35.040
適用范圍：This International Standard defines the Symbolic Music Representation technology. By capitalising theSymbolic Music Representation technology the acronym “SMR” has been derived.A symbolic representation of music is a logical structure based on symbolic elements representing audiovisualevents, the relationship between those events, and aspects related to how those events can be rendered andsynchronized with other media types.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 visionimpairedreaders. MPEG-4 SMR does not standardize one or more of these representations, but instead is anextensible language allowing those representations and many more which share a common underlyingstructure of music representation.MPEG-4 SMR allows the synchronization of symbolic music elements with audiovisual events that existingstandardized MPEG technology can represent and render.The SMR technology is composed of different tools, which normative descriptions are in Clauses 7 to 12.― SMR Bitstream: the syntax and semantics of the SMR bitstream.― Symbolic Music Extensible Format (SM-XF): the syntax and semantics of the SMR format.― Symbolic Music Synchronization Information (SM-SI): the syntax and semantics of thesynchronisation Information between the SMR elements and the other audiovisual elements.― Symbolic Music Formatting Language (SM-FL): the syntax and semantics of the rendering rules thatare applied to the SMR XML format for rendering.― SMR Object Types for Profiles: the object types of SMR to be used for the definition of Profiles.