Filtering with spatial parameters in B-format audio streams

University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

Abstract: The B-format is an audio format capable of reproducing full spherical surround audio, meaning sounds can appear as if coming from any direction around the listener. This thesis investigates an approach to quantify and manipulate the spatial information carried in B-format audio signals. It describes an analysis method and a corresponding model for quantifying the spatial data. Two types of applications of the analysis method and model are then presented: a data mapping acting as a visualization of B-format audio signals and a set of filter types acting on B-format signals using the spatial properties from the analysis and model as input parameters. The B-format has gotten a surge of interest recently, much due to the rise of virtual reality where the flexibility of the format has proven useful. Compact B-format compatibly microphone arrays allows for easy capturing real world scenes while the simplicity of the format makes for an an easily processable intermediate format.

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