mirror of
https://github.com/modelscope/FunASR
synced 2025-09-15 14:48:36 +08:00
52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
import argparse
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import json
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import numpy as np
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def get_parser():
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parser = argparse.ArgumentParser(
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description="cmvn converter",
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formatter_class=argparse.ArgumentDefaultsHelpFormatter,
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)
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parser.add_argument(
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"--cmvn_json",
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default=False,
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required=True,
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type=str,
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help="cmvn json file",
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)
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parser.add_argument(
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"--am_mvn",
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default=False,
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required=True,
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type=str,
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help="am mvn file",
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)
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return parser
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def main():
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parser = get_parser()
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args = parser.parse_args()
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with open(args.cmvn_json, "r") as fin:
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cmvn_dict = json.load(fin)
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mean_stats = np.array(cmvn_dict["mean_stats"])
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var_stats = np.array(cmvn_dict["var_stats"])
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total_frame = np.array(cmvn_dict["total_frames"])
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mean = -1.0 * mean_stats / total_frame
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var = 1.0 / np.sqrt(var_stats / total_frame - mean * mean)
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dims = mean.shape[0]
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with open(args.am_mvn, 'w') as fout:
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fout.write("<Nnet>" + "\n" + "<Splice> " + str(dims) + " " + str(dims) + '\n' + "[ 0 ]" + "\n" + "<AddShift> " + str(dims) + " " + str(dims) + "\n")
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mean_str = str(list(mean)).replace(',', '').replace('[', '[ ').replace(']', ' ]')
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fout.write("<LearnRateCoef> 0 " + mean_str + '\n')
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fout.write("<Rescale> " + str(dims) + " " + str(dims) + '\n')
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var_str = str(list(var)).replace(',', '').replace('[', '[ ').replace(']', ' ]')
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fout.write("<LearnRateCoef> 0 " + var_str + '\n')
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fout.write("</Nnet>" + '\n')
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if __name__ == '__main__':
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main()
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