实现用SDRAM运行nios，同时用SRAM保存摄像头数据，LZ复杂度反映的是一个时间序列中，基于kaiser窗的双谱线插值FFT谐波分析。- Implemented with SDRAM run nios, while saving camera data SRAM, LZ complexity is reflected in a time sequence, Dual-line interpolation FFT harmonic analysis kaiser windows.