Dissertation in the field of Acoustics and Signal Processing, Archontis Politis
The title of thesis is ”Microphone array processing for parametric spatial audio techniques”.
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Delivery of immersive media content is becoming increasingly popular. Spatial audio, along with visual content, is a fundamental component for immersion. Apart from producing spatial sound, it is also useful to record real sound scenes, using multiple microphones. During spatial sound reproduction, the microphone signals are distributed appropriately to the channels of the playback system, aiming to give the sense of being in the real scene. Traditional non-parametric methods take into account only the properties of the microphone array and the playback setup and, using practical recording devices, are unable to capture the spatial complexity of the sound scene.
Recent parametric spatial audio methods consider the statistics of the microphone signals and use them to distribute the recordings to loudspeakers or headphones, in a flexible and perceptually-motivated way. This doctoral research combines elements of microphone array processing with parametric spatial audio processing, in order to analyze the sound scene with higher resolution compared to previous attempts, while maintaining flexibility and high perceptual quality at reproduction.
Apart from high-resolution spatial sound recording and reproduction, the principles of parametric spatial audio processing are applied to creative transformations of recorded sound scenes, spatial enhancement of established traditional recording methods, and analysis of spatial acoustic responses of rooms for auralization of acoustical spaces.
Opponent: Doctor Gary Elko, mh acoustics, New Jersey, NY, USA
Supervisor: Professor Ville Pulkki, Aalto University School of Electrical Engineering, Department of Signal Processing and Acoustics
Contact information:
Archontis Politis
tel +358 50 4202 088
archontis.politis@aalto.fi