Evaluation of Ambisonics Decoding Methods with Experimental Measurements
Evaluation of Ambisonics Decoding Methods with Experimental Measurements
复制标题
通过实验测量评估高保真度立体声响解码方法
DOI：
10.14279/depositonce-7
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Mincheol Shin
中科院分区：
文献类型：
--
作者：
D. M. Gómez;F. Fazi;Mincheol Shin
高保真度立体声是一种基于使用球谐函数分解声场的声音再现技术。用于重建声场的系数的数量的截断导致取决于频率和收听者空间位置的再现伪像。在这项工作中，三种不同的解码方法（基本，最大rE和在相位）的性能进行了研究和评估的实验测量的结果。后者使用由40个均匀分布的扬声器和平移的29通道线性麦克风阵列组成的球形阵列进行。根据合成声场与期望声场的差异，对误差进行了分析。结果表明，正如预期的那样，准确声场重建区域的大小随着频率的增加而减小，但根据所实现的解码器的类型而具有不同的趋势
Ambisonics is a sound reproduction technique based on the decomposition of the sound field using spherical harmonics. The truncation in the number of coefficients used to recreate the sound field leads to reproduction artifacts which depend on the frequency and the listener spatial location. In this work, the performance of three different decoding methods (Basic, Max-rE and In-Phase) has been studied and evaluated in the light of the results of experimental measurements. The latter were performed using a spherical array composed of 40 uniformly distributed loudspeakers and a translating 29-channel linear microphone array. An error analysis is presented based on the difference between the desired and synthesized sound pressure and acoustic intensity field. The results indicate that, as expected, the size of the region of accurate sound field reconstruction reduces as frequency increases, but with different trends depending on the type of decoder implemented