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 res...
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.
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.
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제안 방법
Using these impulse responses, we generated virtual sources using mono sources for a localization experiment. The subjective localization experiments were performed in the anechoic chamber to validate the system's performance. The results of our experiments show that our system can resolve the front/back confusions in 5-channel and 4-channel reproduction environments and can get similar results in a headphone reproduction as a binaural recording.
The experiment was carried out in the anechoic chamber of Tokyo Denki University with ten students who had normal hearing ability and were inexperienced in these kinds of localization experiments. The test contents were made by simulation using a mono source and a rigid sphere's impulse responses. Three test contents consisted of male and female voices and a classical music clip.
대상 데이터
To verify the performance of our system, we carried out subjective experiments for a multi-channel loudspeaker and headphone reproduction environments. The experiment was carried out in the anechoic chamber of Tokyo Denki University with ten students who had normal hearing ability and were inexperienced in these kinds of localization experiments. The test contents were made by simulation using a mono source and a rigid sphere's impulse responses.
Impulse nssponses produced by a sphens wens measured in order to calculate various inverse filters for post processing. The measurements were performed in Tokyo Denki University's anechoic chamber. The sphere was mounted 1.
3 and KEMAR's HRTF. The test contents wens male and female voices and music clips. Each experiment source was generated using a KEMAR and a rigid sphere's impulse responses.
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