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A sparse sound field decomposition method is proposed. Sound field decomposition is the foundation of the various acoustic signal processing applications and enables the estimation of the entire sound field from pressure measurements. The plane wave decomposition, i.e., spatial Fourier analysis, of the sound field has been widely used; however, artifacts originating from spatial aliasing occur above...
For hands-free spoken dialogue system, we propose an interface to eliminate known noise outputted by the dialogue system and unknown noise sufficiently by giving known source of the loudspeaker output. Moreover, elimination of known noise is reinforced by sound field control. The proposed method, at first, eliminates the loudspeaker output at the microphone points using sound field control with fixed...
A method for achieving super-resolution of sound field recording and reproduction is proposed. To obtain driving signals of loudspeakers for reproduction from received signals of microphones, sparse signal decomposition makes it possible to reduce spatial aliasing artifacts when the number of microphones is less than that of loudspeakers. For more accurate and robust signal decomposition, we propose...
This paper describes a new small-scale interface for a barge-in free spoken dialogue system combining a multichannel sound field control and a microphone array, in which the response sound from the system can be canceled out at the microphone points. The conventional method inhibits the user from moving because the system forces the user to stay in the fixed position where the response sound is reproduced...
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