Patent ID: 11882299
Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  Y | IPC G  H

Claim 4:
5. The predictive contrastive representation method according to claim 4,
wherein the step of constructing, based on the correct similarity and the plurality of false similarities, the predictive contrastive loss function for the temporal coding information at the current moment and the future situational information comprises:
constructing, based on the correct similarity and the plurality of false similarities, the following predictive contrastive loss function for the temporal coding information at the current moment and the future situational information:, L
   N
  
  =
  
   -
   
    
     E
     S
    
    [
    
     log
     ⁢
     
      
       
        f
        k
       
       (
       
        
         s
         
          t
          +
          k
         
        
        ,
        
         c
         t
        
       
       )
      
      
       
        
         ∑
          
        
        
         
          s
          j
         
         ∈
         S
        
       
       ⁢
       
        
         f
         k
        
        (
        
         
          s
          j
         
         ,
         
          c
          t
         
        
        )
       
      
     
    
    ]
   
  
 

wherein (st+k, ct) denotes a positive sample pair, (sj, ct) denotes a negative sample pair, s denotes a total number of samples, sj denotes the negative sample, and E denotes an expected value.