Patent ID: 11902533
Assignee: ZHEJIANG UNIVIEW TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. The bit rate control apparatus according to claim 13, wherein the feature region comprises: a region of interest, a motion region, a complexity region, or an excessively bright or dark region; and
wherein the quality factor is optimized by the quality factor optimization module using following formula:, QP
  =
  
   {
   
    
     
      
       
        
         QP
         min
        
        (
        
         b
         ≤
         
          b
          min
         
        
        )
       
                                                                               
      
     
    
    
     
      
       
        QP
        min
       
       +
       
        
         (
         
          
           QP
           max
          
          -
          
           QP
           min
          
         
         )
        
        *
        
         b
         
          b
          min
         
        
        ⁢
        
         (
         
          
           b
           min
          
          <
          b
          ≤
          
           b
           max
          
         
         )
        
       
      
     
    
    
     
      
       
        
         QP
         max
        
        (
        
         b
         >
         
          b
          max
         
        
        )
       
                                                                              
      
     
    
   
  
 

where QP is the quality factor of the motion region, QPmin is a preset minimum value of the quality factor of the motion region, QPmax is a preset maximum value of the quality factor of the motion region, b is a proportion of the motion region in a picture, bmin is a preset lowest proportion of the motion region in the picture, and bmax is a preset highest proportion of the motion region in the picture.