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Icsa 2017
Sep 7th to 10th, 2017
Graz, Austria

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ICSA 2017 4th International Conferenceon Spatial Audio | September 7th to 10th, 2017, Graz, Austria #vdticsa

Ambiguities in today`s definitions of Higher Order Ambisonics signals

Higher Order Ambisonics (HOA) is a format for representing three- dimensional sound, which has recently found its way into commercial products especially in the context of 360° videos. Beyond being used by the famous video hosting service YouTube, it is an integral part of various software tools or digital audio interface plug-ins for the HOA encoding of microphone array recordings, for the HOA mixing and binaural rendering. Based on the fact that there exist different particular definitions of HOA formats, the correct interoperability of all tools requires each manufacturer to provide its own definition or to relate to an existing one. This contribution points out ambiguities in these definitions, which might lead to fatal misinterpretations of the sound field.