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python/cmusphinx/test_s3model.py

 

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#!/usr/bin/env python

 

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import hmm

 

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import unittest

 

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import s3model

 

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import s2mfc

 

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from feat import _1s_c_d_dd

 

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import os

 

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import numpy

 

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class TestS3Model(unittest.TestCase):

 

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    def setUp(self):

 

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        thisdir = os.path.dirname(__file__)

 

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        self.testdir = os.path.join(thisdir, 'test', 'tidigits')

 

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        self.acmod = s3model.S3Model(self.testdir)

 

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    def test_created(self):

 

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        self.assert_(abs(self.acmod.tmat[0][0,1] - 0.3326) < 0.01)

 

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        self.assert_(abs(sum(self.acmod.mixw[0,0]) - 1.0) < 0.01)

 

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        self.assert_(abs(self.acmod.var[0][0][0][0] - 0.2583) < 0.01)

 

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        self.assert_(abs(self.acmod.var[35][0][0][38] - 16.9266) < 0.01)

 

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    def test_compute(self):

 

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        mfcc = s2mfc.open(os.path.join(self.testdir, 'man.ah.111a.mfc')).getall()

 

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        mfcc -= mfcc.mean(0)

 

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        feat = _1s_c_d_dd.compute(mfcc)

 

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        senones = [0, 69, 135, 525]

 

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        expected = [3.03518949e-36, 1.00000000e+00, 4.47046728e-16, 1.07179724e-01]

 

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        senscr = self.acmod.senone_compute(senones, feat[0])

 

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        for i,s in enumerate(senones):

 

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            self.assert_(abs(senscr[s] - expected[i]) < 0.01)

 

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if __name__ == '__main__':

 

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    unittest.main()

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