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.
出处
《电声技术》
2013年第8期70-72,76,共4页
Audio Engineering
