摘要
目前经典的虚拟低音增强技术的时域算法存在比较明显的非线性失真。对基于非线性器件的虚拟低音增强算法进行了研究和改进,引入自适应格型陷波滤波器进行频率追踪,并改进了传统的谐波产生方法。Rnonlin客观模型与隐藏参考和基准的多刺激法(multistimuli with the hidden reference and anchor,MUSHRA)主观听音实验的结果表明,改进后的时域虚拟低音增强算法音质明显得到改善,低音感知效果得到一定的提高。
The classical time -based nonlinear devices technique（NLD） for the virtual bass system has obvious nonlinear distortions. To reduce distortions, a frequency tracking nonlinear devices technique is presented. This technique adopts adaptive notch filter（ANF） for frequency tracking and an improved method for harmonic generation. The Rnonlin distortion evaluation model test and the subjective listening test called muhistimuli with the hidden reference and anchor （MUSHRA） are conducted. The results show that new technique achieves good bass impression with reduced distortion.
出处
《电声技术》
2015年第2期72-76,共5页
Audio Engineering
关键词
虚拟低音
频率追踪
非线性器件
自适应陷波
virtual bass
frequency tracking
nonlinear devices
adaptive notch filter
