????????? GMM???????? - PowerPoint PPT Presentation

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????????? GMM????????

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GMM – PowerPoint PPT presentation

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Title: ????????? GMM????????


1
?????????GMM????????
  • ????????????
  • ?? ??,?? ??,?? ??

2
?????
  • ??????????????????
  • ?????????????????
  • ???????????????????

3
?????
  • ??????????????????????,???????????????????

???
o m o t e
4
?????????
????? ???
???????
?????
????
?????
????
????????
5
???????
  • ??????????????????????
  • ???????????(?)??????
  • ???????????????????????????
  • ?????????????????????????

K-means???
?????????d???
?ltd?? ??????
6
???????
  • ??????????????????????
  • ????????????

d lt50
  • ?????????
  • ?????????

d lt25
...
Class 2 coins coin
Class 1 phone
Class N Tear
..
7
?????????
????? ???
???????
?????
????
?????
????
????????
8
?????
  • ????????????????
  • ???????????????
  • ????AdaBoost???
  • ?????decision stump

??????
??????????????????????????
?????
???
??????
????????
9
?????
Classifier

???????????????? ???????? ???????????????? ????on
e-vs-rest??????AdaBoost???
...
Class 1 phone
Class 2 coins coin
Class N Tear
..
10
????
????? ???
???????
?????
????
?????
????
????????
11
??????????
????????????
(b???????)
????????????? ?????????????(?????)
???????a???
12
??????????
?2??????????????
13
GMM??????
2001eurospeech, segura et.al
???????GMM(Gaussian Mixture Model)
????
????
??
????????????
?2?????????????????? ??????????
??
14
????
  • EM????????????
  • p(x)???????????
  • ?????????
  • p(x,m)????????????????
  • ???????????????????

15
EM????????????
?????????a?????
EM?????????
???????????????????
16
EM????????????
????????????????????????????
??????????????
17
???????
?
???????????????
???
????
????????????? ?????????
a
18
???????
??? ???
???????
????????????????????
????????
19
????(????)
  • ??????
  • SNR?????
  • ??????500??4?
  • ?2000??(???????????)
  • SNR -5,0,5 dB
  • ???????20300 ms??
  • ?????
  • ATR????????
  • ??2???2?
  • ????? S. Nakamura, et al, 2000
  • RWCP????????????????????(105?)
  • 1?????100????????50????????50???????????
  • ?????
  • ????2000??
  • AdaBoost?????????????????????
  • ???????
  • AdaBoost?????200?
  • ???24?????????????
  • ????
  • ??????GMM???16,32,64
  • ??????
  • ??????50,25,12,6
  • ????45
  • ???
  • MFCC 12??
  • ???????????HMM????????
  • ??HMM ?5?? 4??

20
??????
5 dB 0 dB -5 dB
??? 0.820 0.897 0.952
??? 0.827 0.831 0.833
??? 0.283 0.404 0.470
21
??????
SNR -5 dB
96.5
Oracle label
22
??????
SNR 0 dB
96.5
Oracle label
23
??????
SNR 5 dB
96.5
Oracle label
24
????????????
  • 10-fold??????????????94????????11??????????????
  • GMM 64??,????????????

5 dB 0 dB -5 dB
??? 0.808 0.879 0.934
??? 0.802 0.806 0.806
25
?????????
  • ??????????????
  • ???????????????????????????????????
  • ?????????????????
  • ???????????????????
  • ??????????????????
  • ???????

26
??????????a???
??????????????!
?????????????????
??????????
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