Encoding large array signals into a 3D sound field representation for selective listening point audio based on blind source sepa

A sound eld reproduction method which uses blind source separation and head-related transfer function is proposed. In the proposed system, multichannel acoustic signals captured at the distant microphones are encoded to a set of location/signal pairs of virtual sound sources based on frequency-domain ICA. After estimating the locations and the signals of the virtual sources, by convolving the controlled acoustic transfer functions with each signal, the spatial sound at the selected point is constructed. In the evaluation, the sound eld made by 6 sound sources is captured using 48 distant microphones and is encoded into set of virtual sound sources. Subjective evaluation shows that there is no signi cant difference between natural and reconstructed sound when more than 6 virtual sources are used. Therefore the effectiveness of the encoding algorithm as well as the virtual source representation is con rmed.

• Type: Conference
• Year: 2008
• Where: ICASSP
• Authors: Kenta Niwa, Takanori Nishino, Kazuya Takeda
• Keywords: ICASSP 2008, Signal Processing, Sound Eld, Virtual Sound Sources, Virtual Source