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Master-Vortrag: Multichannel Acoustic Echo Compensation for Spatial Audio Communication

Xiao Luo
Freitag, 11. Oktober 2019
14:00 Uhr
Hörsaal 4G

Emerging devices supporting 3D audio recording and reproduction accelerate progress towards immersive telecommunications desired by teleconferencing and many other application scenarios. However, the massive number of microphones and loudspeakers required in such systems poses challenges for acoustic echo compensation.

In this master thesis, it is verified that the classical acoustic echo compensation is hardly scalable to the massive multichannel systems, subject to the system complexity and the well-known non-uniqueness problem. Therefore, a new method of echo compensation is proposed in this work, attempting to apply spatial filtering on the 3D audio signal for source separation and generate the desired echo estimates with much fewer estimation channels. Typical techniques for source separation like beamforming and principal component analysis are investigated, showing high potential for satisfying the needs of massive multichannel echo compensation with largely reduced complexity.