Circuit-efficient sample-rate convertor by Fourier interpolation

本课题涉及到SRC采样率转换器，不同采样率的数字音视频必然会激增。现有的SRC由于时域处理复杂，不能同时满足高性能和小电路的要求。本课题提出了一种基于傅立叶变换的频域信号重构方法。与现有的多抽头滤波方法相比，该方法体积小得多，在电路中约为两个，性能相当。

This project relates to SRC, sample-rate convertor, inevitable for now proliferate digital audio and video with different sampling rates. Existing SRC cannot simultaneously satisfy good performance (THD) and small circuit, because of complicated processing in the time domain. This project proposes a novel method to reconstruct signal in the frequency domain, after Fourier transform. Compared to existing methods with multi-tap filters, the method is much smaller, in the order of two, in circuit for equivalent performance.