Patent ID: 11869513
Assignee: VERIDAS DIGITAL AUTHENTICATION SOLUTIONS, S.L.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. The method according to claim 1, wherein the updating of the reference voiceprint is performed based on the following formula:, e
    t
    
      (
      s
      )
    
  
  =
  
    
      
        
          
            
              (
              
                γ
                -
                1
              
              )
            
            ⁢
            
              σ
              ⁡
              
                (
                x
                )
              
            
          
          +
          
            γ
            ⁡
            
              (
              
                1
                -
                Ψ
              
              )
            
          
        
        
          γ
          -
          Ψ
        
      
      ⁢
      
        e
        
          t
          -
          1
        
        
          (
          s
          )
        
      
    
    +
    
      
        (
        
          1
          -
          
            
              
                
                  (
                  
                    γ
                    -
                    1
                  
                  )
                
                ⁢
                
                  σ
                  ⁡
                  
                    (
                    x
                    )
                  
                
              
              +
              
                γ
                ⁡
                
                  (
                  
                    1
                    -
                    Ψ
                  
                  )
                
              
            
            
              γ
              -
              Ψ
            
          
        
        )
      
      ⁢
      
        
          v
          t
          
            (
            
              s
              ′
            
            )
          
        
        .
      
    
  

wherein et(s) corresponds to the updated reference voiceprint, et-1(s) corresponds to the reference voiceprint to be updated, vt(s) corresponds to the speech voiceprint, and λ(σ(χ),ψ, γ) corresponds to a remembering factor balancing a relative importance of et-1(s) and vt(s) in the updating, optionally said remembering factor λ(σ(χ),ψ, γ) being a truncated monotonic decreasing linear function.