A Study on Signal Processing using Multimedia Contents and Kansei Evaluation for Super High Fidelity Reproducing System.

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Recent multi-media technology has made it possible to easily construct various audio-visual environments and to reproduce a three-dimensional sound field. Head-related transfer functions(HRTFs) are usuallyused for realizing that sound field by using FIR filters. These FIR filters have many difficult technical-items for realizing control system. In our past study, we solved these problems by means of designing procedure for the HRTF using IIR filters. In this research, an approximation method using IIR filters has been proposed for simply realization of the three-dimensional sound localization. Furthermore, we studied audio-visual interaction from a psychological viewpoint for reproducingan auditory-visual high presencespace. As the result, the reproducibility of a sound field wasimproved to the higher frequency band by the effect. Moreover, sound localization experimentsin distance on a horizontal plane were carried out usingour HRTFs designed under the approximation conditions with a transaural reproduction. Then, we believe that our proposal methods are useful for reproducing a super three-dimensional sound fieldin future.