matlab的gfcc特征提取
时间: 2023-08-18 07:04:58 浏览: 408
要在MATLAB中提取GFCC(Gammatone Frequency Cepstral Coefficients)特征,可以使用以下代码:
```matlab
% 首先对语音进行非线性自适应时频分析的去噪
noisySignal = audioIn; % 输入的语音信号
cleanSignal = denoiseSignal(noisySignal); % 去噪后的语音信号
% 进行Gammatone滤波器组的频谱分析
fs = info.SampleRate; % 采样率
numFilters = 40; % Gammatone滤波器组的数量
frameLength = 25; % 帧长度(毫秒)
frameShift = 10; % 帧移(毫秒)
gfccCoeffs = gammatoneFilterBank(cleanSignal, fs, numFilters, frameLength, frameShift);
% 计算GFCC系数
numCepstralCoeffs = 13; % GFCC的系数数量
gfccFeatures = cepstralCoefficients(gfccCoeffs, numCepstralCoeffs);
% 返回GFCC特征向量
dataOut = gfccFeatures;
```
这段代码首先对输入的语音信号进行非线性自适应时频分析的去噪处理。然后,利用Gammatone滤波器组对去噪后的语音信号进行频谱分析。接下来,通过计算GFCC系数,得到GFCC特征向量。最后,将特征向量作为输出。
请注意,此处的代码只是提供了一个示例,具体的实现可能会根据实际情况而有所不同。你可能需要根据你的数据和需求进行适当的调整。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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