Patent ID: 11972754
Assignee: TENCENT AMERICA LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. The Seq2Seq speech recognition training method of claim 2, wherein the CTC loss function is defined as a mean of normalized edit distance between hypothesis H(x) and the corresponding targets,, Loss
      ⁢
      
        
      
      ⁢
      
        (
        
          H
          ,
          S
        
        )
      
    
    =
    
      
        1
        
          
          S
          
        
      
      ⁢
      
        
          ∑
          
            x
            ,
            
              t
              ∈
              S
            
          
        
        ⁢
        
          
        
        ⁢
        
          
            editDistance
            ⁡
            
              (
              
                
                  H
                  ⁢
                  
                    
                  
                  ⁢
                  
                    (
                    x
                    )
                  
                
                ,
                t
              
              )
            
          
          
            
            t
            ⁢
            
              
            
            
          
        
      
    
  
  ,

where S=(x, t) is the training set containing all pairs of input x and its corresponding target t.