0. 说明

ForcePPG: 一种基于ForceAlignment的PPG

使用Aishell-1+Librispeech ForceAlignment结果训练的ASR, 训练的并不充分, 为了和之前的结果能够对比, 不进行ckpt early stop的替换
ASR未用到F0, 使用的结构参看:[1] https://blog.csdn.net/u013625492/article/details/109670529 [2] https://blog.csdn.net/u013625492/article/details/109206085 [3] https://blog.csdn.net/u013625492/article/details/109201157
效果可能不是最好, 但是作为PPG可以用

1. 提取流程

1.1. Wav

DataBaker
LJSpeech

简单的RAW的WAV就可以了

1.2. 提取文件

先说CN-ASR, 再说EN-ASR, 分别生成两个地方的文件夹, 最后调用的时候, 合并成B-PPG

可参考这个: https://github.com/ruclion/ppgs_extractor_10ms_sch_lh_aishell1/blob/master/extract_ppg_generate_DataBaker_ForcePPG.py

1.2.1. CN-ASR

# 超参数个数：16
hparams = {
    'sample_rate': 16000,
    'preemphasis': 0.97,
    'n_fft': 400,
    'hop_length': 160,
    'win_length': 400,
    'num_mels': 80,
    'n_mfcc': 13,
    'window': 'hann',
    'fmin': 30.,
    'fmax': 7600.,
    'ref_db': 20,  
    'min_db': -80.0,  
    'griffin_lim_power': 1.5,
    'griffin_lim_iterations': 60,  
    'silence_db': -28.0,
    'center': True,
}


assert hparams == audio_hparams


MFCC_DIM = 39
PPG_DIM = 218

# in 
meta_path = '*.txt'
wav_dir = '*/wavs_16000'

# out1
ppg_dir = './LJSpeech-1.1-Mandarin-PPG/ppg_generate_10ms_by_audio_hjk2'
mfcc_dir = './LJSpeech-1.1-Mandarin-PPG/mfcc_10ms_by_audio_hjk2'
mel_dir = './LJSpeech-1.1-Mandarin-PPG/mel_10ms_by_audio_hjk2'
spec_dir = './LJSpeech-1.1-Mandarin-PPG/spec_10ms_by_audio_hjk2'
rec_wav_dir = './LJSpeech-1.1-Mandarin-PPG/rec_wavs_16000'
os.makedirs(ppg_dir, exist_ok=True)
os.makedirs(mfcc_dir, exist_ok=True)
os.makedirs(mel_dir, exist_ok=True)
os.makedirs(spec_dir, exist_ok=True)
os.makedirs(rec_wav_dir, exist_ok=True)
# out2
STARTED_DATESTRING = "{0:%Y-%m-%dT%H-%M-%S}".format(datetime.now())
good_meta_path = './LJSpeech-1.1-Mandarin-PPG/meta_good_' + STARTED_DATESTRING + '_v3.txt'
f_good_meta = open(good_meta_path, 'w')

# NN->PPG
ckpt_path = './aishell1_ckpt_model_dir/aishell1ASR.ckpt-128000'

代码位于/ceph/home/hujk17/ppgs_extractor_10ms_sch_lh_aishell1/extract_ppg_generate_LJSpeech_ForcePPG.py
以及/ceph/home/hujk17/ppgs_extractor_10ms_sch_lh_aishell1/extract_ppg_generate_DataBaker_ForcePPG.py
生成的mel和PPG在对应位置

1.2.2. EN

略