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The design of improved first order ambisonic decoders by the application of range removal and importance in a heuristic search algorithm

Moore, David J. and Wakefield, Jonathan P. (2007) The design of improved first order ambisonic decoders by the application of range removal and importance in a heuristic search algorithm. In: 31st Audio Engineering Society International Conference, 25th-27th June 2007, London, UK.

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Abstract

This paper presents improvements to previous work on deriving first order Ambisonic decoders for ITU 5.1. The decoders are derived using a heuristic search method with an objective function based upon Gerzon’s metatheory of auditory localization. An analysis of previously derived decoders shows that they are biased toward particular design objectives due to the nature of the multiobjective function guiding the search. This paper applies a technique called range removal to systematically and logically remove this bias that leads to improved decoder coefficients that better meet all of the objectives. A further technique known as importance is introduced that enables the logical biasing of range-removed objectives. A case study to develop a “max RE” decoder demonstrates this technique in action.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Schools: School of Computing and Engineering
School of Computing and Engineering > Pedagogical Research Group
School of Computing and Engineering > Music Technology and Production Research Group
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Depositing User: Briony Heyhoe
Date Deposited: 25 Jun 2008 17:12
Last Modified: 16 Dec 2010 10:19
URI: http://eprints.hud.ac.uk/id/eprint/902

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