Patent ID: 11871036
Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The apparatus for compressing JPEG images according to claim 1, wherein the decoding unit further comprises a DC coefficient generation unit to generate the quantized DC pixel value (px,yDC) by decoding the pixel at the specific block location (x, y) in the quantized DC component using the following Equation 3, and generate the quantized DC coefficient (D0, 0) by decoding the pixel at the specific block location (x, y) using the following Equation 4 rewritten from the Equation 3:, p
      
       x
       ,
       y
      
      DC
     
     =
     
      
       
        
         
          1
          
           2
          
         
         ⁢
         
          1
          
           2
          
         
         ⁢
         
          QF
          
           0
           ,
           0
          
         
         ×
         
          D
          
           0
           ,
           0
          
         
        
        4
       
       ⁢
       
        cos
        ⁡
        (
        0
        )
       
       ⁢
       
        cos
        ⁡
        (
        0
        )
       
      
      =
      
       
        
         QF
         
          0
          ,
          0
         
        
        ×
        
         D
         
          0
          ,
          0
         
        
       
       8
      
     
    
   
   
    
     [
     
      Equation
      ⁢
         
      3
     
     ]
    
   
  
 

 
  
   
    
                     
     
      
       D
       
        0
        ,
        0
       
      
      =
      
       
        8
        
         QF
         
          0
          ,
          0
         
        
       
       ×
       
        
         p
         
          x
          ,
          y
         
         DC
        
        .
       
      
     
    
   
   
    
     [
     
      Equation
      ⁢
         
      4
     
     ]