三维声双耳渲染感知效果的客观评测

Objective Evaluation of 3D Sound Binaural Rendering Perception Effects

随着双耳渲染技术在终端中的逐步应用,双耳渲染效果的主客观评价需求在不断增长。本文在已有三维声双耳渲染感知效果评价的二级维度(音质、定位、空间)基础上,进行更全面、细致的三级维度客观评测与建模,将通过主观感知实验得到的各三级维度评分结果与标准人工头双耳录音的不同类型客观特征进行岭回归建模。结果表明:浑厚度、总体音质、声源距离、静态声源定位、空间感、混响声质量和空间自然度等三级维度的评价更取决于双耳空间特征;清晰度与时频特征的关联性更强;其余特征更依赖时频特征与双耳空间特征的组合。

With the gradual application of binaural rendering technology in terminals,the demand for subjective and objective evaluation of binaural rendering effects is growing.In this paper,based on the existing secondary dimensions(sound quality,localization,and space)for evaluating the perceptual effects of 3D sound binaural rendering,a more comprehensive and detailed objective evaluation and modeling of the tertiary dimensions is conducted,and the scoring results of each tertiary dimension obtained through subjective perception experiments are modeled by ridge regression with different types of objective features of the standard artificial head binaural recordings.The results show that the evaluation of the three-level dimensions of mellowness,overall sound quality,sound source distance,static source localization,spatial perception,reverberant sound quality and spatial naturalness depend more on the binaural spatial characteristics;clarity is more strongly correlated with the time-frequency characteristics;and the remaining characteristics depend more on the combination of time-frequency characteristics and binaural spatial characteristics.