一种基于频谱细化分析的虚拟低音VB Phase Vocoder算法改进  

Improved VB Phase Vocoder Algorithm Based on Intensive Spectrum Correction

作　　者：郑荣辉[1] 姚剑敏[1] 叶芸[1] 郭太良[1] 

机构地区：[1]福州大学场致发射国家地方联合工程实验室,福建福州350002

出　　处：《电声技术》2013年第8期70-72,76,共4页Audio Engineering

摘　　要：介绍了产生虚拟低音的VB Phase Vocoder算法,阐述了其频谱确定方法在处理密集频谱时的不足。针对此情况引入了基于复解析带通滤波器的复调制细化频谱分析,通过对低频段的细化处理,提高了频谱确定单元的处理精度。实验证明该做法能有效改善虚拟低音的音色,其低音响度也与真实音频更为接近。The virtual bass VB Phase Vocoder algorithm is described and the shortage of the spectrum-determination method in processing the intensive spectrum is discussed. According to the above situation, the zoom spectrum analysis is adopted based on complex analytic band pass filter. By refining the low--frequency stage, the precision of the spectrum confirming module is enhanced. The final results prove that the timbre of the virtual bass has been effectively improved. The loudness of the virtual bass is closer to the real audio frequency.

关 键 词：虚拟低音 VB PHASE Vocoder算法 密集频谱 

分 类 号：TN70[电子电信—电路与系统]