演繹オブジェクト指向データベースを用いた 演奏生成アプリケーションオントロジー
平田 圭二, 平賀 瑠美
Application Ontology for Performance Rendering based on Deductive Object-Oriented Database Approach
Keiji Hirata, Rumi Hiraga
Abstract:
This paper discusses the roles of a musical ontology
for performance rendering application.
Basically, performance rendering consists of two stages:
score analysis and
the application of a performance model to the result of the score analysis.
However,
few attempts have successfully programmed these two stages to
realize natural and expressive performance.
This is because of the characteristics of music:
partial, tacit, incomplete, and subjective.
It turned out that almost all conventional systems employed
ad hoc methods with heuristics,
although a few exceptional systems worked well
in very limited musical genres.
We think that an essential problem here is
the lack of evaluation-improvement cycle of system development.
We propose the introduction of a musical ontology
to build a performance rendering system.
Since the musical ontology allows us
to treat music in a formal and explicit way,
it will enable musical concepts to be
real entities in a computer program.
With the musical ontology, we can
elaborate on cause-and-effect relationships
among the system output, the score analysis, and the performance model;
furthermore,
a user will gain more system controllability.
In this paper,
we first clarify
domain ontology for music proposed so far, then
describe an application ontology for performance rendering
based on the deductive object-oriented database technique.