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ETRI journal v.27 no.2, 2005년, pp.153 - 165  

A Spatial Audio System Using Multiple Microphones on a Rigid Sphere

Lee, Tae-Jin    (Digital Broadcasting Research Division,ETRI   ); Jang, Dae-Young    (Digital Broadcasting Research Division,ETRI   ); Kang, Kyeong-Ok    (Digital Broadcasting Research Division,ETRI   ); Kim, Jin-Woong    (Digital Broadcasting Research Division,ETRI   ); Jeong, Dae-Gwon    (Department of Avionics Engineering, Hankuk Aviation University   ); Hamada, Hareo    (Shool of Information Environment, Tokyo Denki University  );
  • 초록

    The main purpose of a spatial audio system is to give a listener the same impression as if he/she were present in a recorded environment. A dummy head microphone is generally used for such purposes. Because of its human-like shape, we can obtain good spatial sound images. However, its shape is a restriction on its public use and it is difficult to convert a 2-channel recording into multi-channel signals for an efficient rendering over a multi-speaker arrangement. In order to solve the problems mentioned above, a spatial audio system is proposed that uses multiple microphones on a rigid sphere. The system has five microphones placed on special points of the rigid sphere, and it generates audio signals for headphone, stereo, stereo dipole, 4-channel, and 5-channel reproduction environments. Subjective localization experiments show that front/back confusion, which is a common limitation of spatial audio systems using the dummy head microphone, can be reduced dramatically in 4-channel and 5-channel reproduction environments and can be reduced slightly in a headphone reproduction.


  • 주제어

    3D audio .   sphere microphone .   HRTF .   dummy head microphone.  

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