Parametric multidirectional decomposition of microphone recordings for broadband high-order ambisonic encoding

Archontis Politis*, Sakari Tervo, Tapio Lokki, Ville Pulkki

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

9 Citations (Scopus)


Higher-order Ambisonics (HOA) is a flexible recording and reproduction method, which makes it attractive for several applications in virtual and augmented reality. However, the recording of HOA signals with practical compact microphone arrays is limited to a certain frequency range, which depends on the applied microphone array. In this paper, we present a parametric signal-dependent approach that improves the HOA signals at all frequencies. The presented method assumes that the sound field consists of multiple directional components and a diffuse part. The performance of the method is evaluated in simulations with a rigid microphone array in different direct-to-diffuse and signal-to-noise ratio conditions. The results show that the proposed method has a better performance than the traditional signal-dependent encoding in all the simulated conditions.

Original languageEnglish
Title of host publication144th Audio Engineering Society International Convention 2018
PublisherAudio Engineering Society
ISBN (Print)9781510864740
Publication statusPublished - 1 Jan 2018
MoE publication typeA4 Article in a conference publication
EventAudio Engineering Society Convention - Milan, Italy
Duration: 23 May 201826 May 2018
Conference number: 144


ConferenceAudio Engineering Society Convention
Abbreviated titleAES


Dive into the research topics of 'Parametric multidirectional decomposition of microphone recordings for broadband high-order ambisonic encoding'. Together they form a unique fingerprint.

Cite this