Proposal for SMDL compliance in MPEG7, ISO/IEC JTC/SC29/WG11/P620 Lancaster, MPEG, 1999. Lancaster, Motion Picture Expert Group.
Carola Boehm, Cordy Hall · Staffordshire Online Repository (Staffordshire University) · 1999
This proposal-discussion takes on board discussions held at the AdHoc Evaluation Meeting in Lancaster including Pre-proposals P620 ("Structured time-based event") and P622 ("music event") and the evaluated proposals P155 ("Sonata Forms Description Scheme") and P154/169/163/170 ("Structured and unstructured links") and document M3649 ("Some remarks on Document Structure and Description Schemes"). Due to the need to create a generic method of specifying and describing music content, this document proposes a set of DS and D to provide a general way of describing music content. It is closely based on an existent standard SMDL1 in order to maximize compatibility in the future. This set of Description Schemes and its associated set of Descriptors describe a structured time-based entity (or musical note or musical entity or audio entity) in its relation to other internal or external structured time-based entities. At a very low-level, a Description Scheme named "thread” can take on form (with different Descriptors) to describe a music event down to note level (or further). These Descriptors can take on different forms, and it is possible that additional descriptors with different means of describing a music event exactly, can be added. Proposed in this document are two , one describing the music entity in its abstract form with its four "logical" characteristics: a) duration, b) p itch, c) loudness and d) other characteristics. The second one describes musical events with SMDL syntax. Another descriptor used in this scheme could be a link to a certain section of a structured or unstructured format.