Speaker Recognition

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Speaker Recognition

• Sharat.S.Chikkerur
• S.Anand Mantravadi Rajeev.K.Srinivasan

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Speaker Recognition

• Definition
• It is the method of recognizing a person based on
  his voice
• It is one of the forms of biometric identification

Speaker Recognition
Speaker Identification
Speaker Verification
Speaker Detection
Text Dependent
Text Independent
Text Dependent
Text Independent
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Speech production
Speech production mechanism
Speech production model
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Generic Speaker Recognition System
Speech signal
Score
Analysis Frames
Feature Vector
Preprocessing
Feature Extraction
Pattern Matching
Verification
Preprocessing
Feature Extraction
Speaker Model
Enrollment

• Stochastic Models
• GMM
• HMM
• Template Models
• DTW
• Distance Measures

• LAR
• Cepstrum
• LPCC
• MFCC

• A/D Conversion
• End point detection
• Pre-emphasis filter
• Segmentation

• Choice of features
• Differentiating factors b/w speakers include
  vocal tract shape and behavioral traits
• Features should have high inter-speaker and low
  intra speaker variation

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Our Approach

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

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Silence Removal

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

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Pre-emphasis

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

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Segmentation

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

• Short time analysis
• The speech signal is segmented into overlapping
  Analysis Frames
• The speech signal is assumed to be stationary
  within this frame

Q31
Q32
Q33
Q34
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Cepstral coefficients

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

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Feature Representation

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

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Dynamic Time Warping

• Preprocessing
• Feature Extraction
• Speaker model
• Matching

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Results
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Matlab Implementation
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THANK YOU