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jpeg中数据的时频转换
- 这是一个用C写的傅立叶变换，以及离散余弦变换的代码，在图象压缩中会用到-This is a C wrote Fourier transform, discrete cosine transform, and the code in image compression will be used
lvbo
- 对音频信号进行几种滤波，有汉明窗，切比雪夫，巴特沃斯等。可以输出时域和频域的对比图。-Several of the audio signal filtering, there is Hamming window, Chebyshev, Butterworth and so on. Can output time domain and frequency domain comparison of Fig.
falabaac-v1.1.0.135.tar
- 新的AAC编码器，最高频宽达到20KHz,里面有与FAAC,neroAAC及经典的mp3编码lame编码后的音频时频图的比较，从时频图和听觉上，falabaaac都要稍好一些 支持windows与linux平台 更多代码及详细可访问 code.google.com/p/falab-New AAC encoder bandwidth up to 20KHz, which has a frequency diagram comparison with of FAAC,
程式碼
- 该代码可做快速傅里叶转换以及离散傅里叶转换以及绘制三维时频图(The code can do fast Fourier transform, as well as discrete Fourier transform, and to draw three-dimensional time-frequency map)
audio process
- 给音频添加多种噪音后去噪，并且绘制时域、频域图的前后对比