extract_features.py 文件源码

def build_data(wav,begin=None,end=None):
    wav_in_file = wave.Wave_read(wav)
    wav_in_num_samples = wav_in_file.getnframes()
    N = wav_in_file.getnframes()
    dstr = wav_in_file.readframes(N)
    data = np.fromstring(dstr, np.int16)
    if begin is not None and end is not None:
        return data[begin*16000:end*16000]
    X = []
    l = len(data)
    for i in range(0, l-100, 160):
        X.append(data[i:i + 480])
    return X