A class of reflector localization techniques use multichannel room impulse responses (RIRs) for the visualization of room reflections on 2D maps. In this paper, we focus on a setup comprising a linear loudspeaker array and a single microphone, which has become practically more relevant given the growing popularity of soundbars. First, the state-of-the-art visualization techniques developed for the generation of 2D time-domain direction-of-arrival (DOA) maps describing the 3D temporal evolution of room reflections are reviewed, and then an alternative high-resolution mapping approach is introduced. The performances of the existing techniques and the proposed method are compared using simulated and experimental multichannel RIR data generated in various room conditions.
Authors: Cagdas Tuna (International Audio Laboratories Erlangen), Albert Prinn (International Audio Laboratories Erlangen), Felix Knauff (Fraunhofer Institute for Integrated Circuits IIS), Andreas Walther (Fraunhofer Institute for Integrated Circuits IIS) and Emanuël Habets (International Audio Laboratories Erlangen)