Abstract：Spectrogram is a kind of graphic representation of time-frequency analysis of speech signals. Because spectrogram can be adopted to demonstrate the dynamic characteristics of time varying speech signals both in frequency domain and time domain, it has been widely employed in speech analysis and phonetic researches. This paper realizes a spectrogram on Field Programmable Gate Array (FPGA) with Short Time Fourier Transform (STFT) method by using a line structure butterfly process unit which adopted Radix4 decimation in time FFT algorithm. The spectrogram is also displayed on VGA displayer by adopting a non-linear mapping algorithm.
孙红英, 杨鸿武, 陶中幸. 语谱分析的FPGA实现[J]. 电子与信息学报, 2011, 33(5): 1238-1242.
Sun Hong-Ying, Yang Hong-Wu, Tao Zhong-Xing. Realization of Spectrogram Analysis with FPGA. , 2011, 33(5): 1238-1242.
2011, Vol. 33 
