基于频域滤波数字均衡器的设计

摘要

In order to solve the multi-band digital equalizer filter calculation data processing problems, through analyzing the design of digital equalizer, digital audio signal is processed in frequency domain filtering, and a highly efficient digital equalization filter is finally designed. In this paper, an algorithm based on the theory of fast fourier transform is proposed,including code bit inversion and butterfly methods of treatment, and compared with the usual fast fourier transform, this algorithm is more effective in reducing the computation of data and data processing time. The results indicate that using this type of algorithm design digital halance filter, comparing with the conventional method of time-domain filtering shows good results in real time processing.%为了解决多频段数字均衡滤波器处理过程中数据计算量的问题,通过对数字均衡器设计的分析,将数字音频信号进行频域滤波处理,最终设计出一种高效的数字均衡滤波器.通过将数字信号在频域中进行傅里叶变换,提出了一种基于快速傅里叶变换原理的算法,该算法中码位倒置和蝶形运算方法的处理与通常的快速傅里叶变换相比,更有效地减少了数据的运算量,减少了数据处理的时间.结果表明,使用该种算法设计的数字均衡滤波器与传统的时域滤波方法相比,具有很好的实时处理效果.