两个听音点处三维声场重建方法

Three-Dimensional Sound Field Reconstruction Method at Two Listening Points

随着3D电影和电视技术的迅猛发展,三维声场重建技术成为当前的研究热点。日本NHK提出了22.2多声道系统,该系统可以在中心听音点或中心听音区域内为听音者带来三维听音体验。但是当重建声场中多于一个听音者时,该系统不能为处于非中心听音点处的听音者带来最佳听音体验,因为最佳听音点位于中心点处。为了解决这一问题,提出一种两个听音点处的三维声场重建方法,通过保持重建前后两个听音者所在位置处的声压和质点速度不变,该方法可以允许两个听音者同时获得最佳听音体验。在两个区域内部,通过仿真实验对比分析了重建区域大小,重建区域之间的距离、角度对重建误差的影响,实验结果证实了提出方法的有效性。

With the rise of 3D movie and 3D television,the reconstruction of three-dimensional sound field is a hot research issue at present.NHK has proposed a 22.2 multichannel system,which can bring 3D listening experience for listener at the central listening point or zone.But when there are more than one listener in the reconstruction sound field,they can not get the best listening experience except the central point,because the best listening point is at the central point.To address this problem,this paper proposes a two listening points 3D sound field reconstruction method,which can allow two listeners to get the best listening experience simultaneously in the same sound field by maintaining the sound pressure and particle velocity at the two listeners’positions before and after reconstruction.In two zones,the influence of the size of reconstructed zones,the distance between reconstructed zones and the angle between reconstructed zones on the reconstruction error is compared and analyzed through the simulation experiments.The experimental results show that the proposed method is effective.