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Implementation of a Super-Resolution Ambisonics-to-Binaural Rendering Plug-In

Authors Giller, P.
Year 2017
Thesis Type Audio Engineering project
Topic Sonification
Keywords Audio, Software, Ambisonics, Aufnahme- und Wiedergabetechnik, binaural, signal processing
Abstract Binaural reproduction of 3D audio is a task with various applications, e.g. in the field of virtual reality. Since there is more than one way to achieve this, a variety of fundamentally different approaches exist. Recordings of real sound fields, which can be represented in a flexible way by the widely used Ambisonics format, usually suffer from low directional resolution due to restrictions of feasible microphone arrays. It is therefore desirable to increase directional resolution. Often, however, assumptions about the qualities of the sound field are involved, which in reality are not always met and may introduce artifacts. The results may also be impaired by parameter estimation errors. The goal is to provide an artifacts-free binaural equivalent of the input signal with enhanced directional sharpness while preserving the perceptual qualities of the original sound field, such as the impression of diffuseness and spaciousness. In this thesis, a recently proposed method that strives to achieve this is implemented in the form of an Ambisonics-to-binaural transcoder real-time audio plug-in.
Supervisors Schörkhuber, C.