decoder.py 文件源码

def wav_to_input( wav_file_name ):
    input_data, f_s = sf.read(wav_file_name)
    # mfcc_feat = MFCC_input(mfcc(input_data,f_s))
    mfcc_feat = mfcc(input_data,f_s)
    #Delta features
    delta_feat = mfcc_feat[:-1]-mfcc_feat[1:]
    #Delta-Delta features
    deltadelta_feat = delta_feat[:-1]-delta_feat[1:]

    #Removing the first two frames
    mfcc_feat = mfcc_feat[2:]
    delta_feat = delta_feat[1:]

    #Concatenating mfcc, delta and delta-delta features
    full_input = np.concatenate((mfcc_feat,delta_feat,deltadelta_feat), axis=1)

    return full_input