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

最新的多媒体技术使构建各种视听环境和再现三维声场成为可能。头部相关传递函数(HRTF)通常用于通过FIR滤波器实现该声场。这些FIR滤波器有许多实现控制系统的技术难点。在过去的研究中，我们通过设计使用IIR滤光片的HRTF的方法解决了这些问题。在这项研究中，提出了一种利用IIR滤波器的近似方法来简单地实现三维声音定位。此外，我们从心理学的角度来研究视听互动，以再现视听的高呈现空间。结果表明，该效应将声场的重现性提高到更高的频段。此外，在此近似条件下设计的HRTF在水平平面上进行了声定位实验，并进行了跨耳再现。因此，我们相信我们提出的方法对于重现未来的超三维声场是有用的。

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.