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Real-time Automatic    Speaker Segmentation Luís Gustavo Martins UTM – INESC Porto [email_address] http://www.inescporto.pt/~lmartins   LabMeetings March 16, 2006 INESC Porto
Notice ,[object Object],[object Object],[object Object],[object Object]
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Scope ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
System Overview
Audio Analysis front-end
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object]
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SOURCE FILTER
Audio Analysis front-end ,[object Object],[object Object],[object Object],Yule-Walker equations Durbin’s recursive algorithm Toeplitz autocorrelation matrix Autocorrelation method
Audio Analysis front-end ,[object Object],Whitening Filter    Pitch LPC Spectrum FFT Spectrum
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Audio Analysis front-end Unvoiced speech frames Voiced speech frames
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ZCR STE voiced unvoiced silence
Audio Analysis front-end ,[object Object]
Audio Analysis front-end ,[object Object],[object Object],-------------------------------------- Portuguese Male 2 -------------------------------------- Total Time  = 60 secs voiced  = 30 secs = 50.0% unvoiced  = 14 secs = 23.3% silence = 13 secs = 21.6% Voiced /(Voiced + Unvoiced) = 68%  Unvoiced / (Voiced + Unvoiced)  = 32% -------------------------------------- Portuguese Male 1 -------------------------------------- Total Time  = 60 secs Voiced = 37 secs = 62% unvoiced  = 12 secs = 20% silence = 10 secs = 17% Voiced /(Voiced + Unvoiced) = 76%  Unvoiced / (Voiced + Unvoiced)  = 24% -------------------------------------- Portuguese Female 2 -------------------------------------- Total Time  = 60 secs voiced  = 30 secs = 50.0% unvoiced  = 19 secs = 31.6% silence = 10 secs = 17% Voiced /(Voiced + Unvoiced) = 61.2%  Unvoiced / (Voiced + Unvoiced)  = 38.7% -------------------------------------- Portuguese Female 1 -------------------------------------- Total Time  = 60 secs voiced  = 32 secs = 53.3% unvoiced  = 17 secs = 28.3% silence = 10 secs = 17% Voiced /(Voiced + Unvoiced) = 65.3%  Unvoiced / (Voiced + Unvoiced)  = 32.7%
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],contamination waste (Theoretical Random Classifier Correct Classifications = 33.33%) Total Classification Error = 18.385% Total Correct Classifications = 81.615+/-1.13912% 64.92 % 33.55 % 0.88 % silence 34.66 % 62.28 % 6.8 % unvoiced 0.41 % 4.17 % 92.32 % voiced silence unvoiced voiced Classified as:  ↓
Audio Analysis front-end ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Speaker Coarse Segmentation
Speaker Coarse Segmentation ,[object Object],[object Object],[object Object],[object Object],Speech stream with 4 speech segments [Campbell97] [Lu2002]
Speaker Coarse Segmentation ,[object Object],[object Object]
Speaker Coarse Segmentation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Speaker Change Validation
Speaker Change Validation ,[object Object],[object Object],[object Object],L 0    L 0    Same speaker in segments X and Y Different   speakers in segments X and Y X Y Z
Speaker Change Validation ,[object Object],[object Object],[object Object],L 1    L 1    Same speaker in segments X and Y Different   speakers in segments X and Y X Y Z
Speaker Change Validation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],   Need to define a  Threshold …   ,[object Object]
Speaker Change Validation ,[object Object],[object Object],[object Object],[object Object],…  but  λ  must be set…  
Speaker Change Validation ,[object Object],[object Object],[object Object],[object Object],[object Object]
Speaker Model Update
Speaker Model Update ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Speaker Model Update ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Speaker Model Update ,[object Object],[object Object],[object Object],[object Object],[object Object]
Speaker Change Validation
Speaker Change Validation ,[object Object],[object Object]
Complete System
Complete System
Experimental Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object]
Experimental Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],[object Object]
Experimental Results ,[object Object],INESC System ver.1  INESC System ver.2  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],INESC System ver.1  INESC System ver.2  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],INESC System ver.2  ,[object Object],[object Object],[object Object],[object Object],[object Object],AUTH System 1  ,[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],AUTH System 1  INESC System ver.2  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],AUTH System 2  INESC System ver.2  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results ,[object Object],[object Object],INESC System ver.1
Achievements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DEMO
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Contributors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Thank you! ,[object Object],[object Object]

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