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ADV7280 Not Recommended for New Designs
The ADV7280 / ADV7280-M are versatile one-chip, multiformat video decoders. The ADV7280 / ADV7280-M automatically detect standard analog baseband video...
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ADV7280 on Analog.com

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ADV7280 Deinterlacing Question



		

			

									
					    gdownes
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 20, 2014 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Not much information is given about how the de-interlacing is done.
    
 
    The part can perform de-interlacing on its own, but does it use a simple line doubling technique where by half of the data is missing?
    
 
    If so, this de-interlacing technique does not allow the displaying of a 1 pixel x 1 pixel array.
    
 
    The datasheet is very light on what you can expect from the de-interlacing.
    
 
    Can anyone comment?
    
 
     
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Feb 21, 2014 3:14 PM
            
            
					
      
	
      

		
		
      
					
      Hi gdownes,
      
 
      There is a bit more information on the deinterlacer  in the ADV7280 available in the ADV728x hardware manual. The hardware manual is available here. http://ez.analog.com/docs/DOC-10612
      
 
      The hardware manual also shows the output resolutions in progressive output modes. I will be adding further information on the deinterlcarer (I2P) in the hardware manual in the near future.
      
 
      The deinterlacer in the ADV7280, ADV7280-M, ADV7282, ADV7282-M all work on a line doubling rather than on a frame buffering technique. This gives the advantage of reduced delay on the output. Also large external  memory is not needed.
      
 
      The line doubling technique uses a propriety analog devices algorithm. It interpolates between two lines (e.g. lines 1 and 3 on an odd frame) to generate the an additional line (e.g. line 2). A smoothing filter is also applied to reduce the effect of low angle noise (i.e. jaggies).
      
 
      I hope this was of some help to you.
      
 
      regards,
      
 
      Robert Hinchy
      
 
      Applications Engineer,
      
 
      Analog Devices Inc, 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Feb 21, 2014 3:14 PM
            
            
					
      
	
      

		
		
      
					
      Hi gdownes,
      
 
      There is a bit more information on the deinterlacer  in the ADV7280 available in the ADV728x hardware manual. The hardware manual is available here. http://ez.analog.com/docs/DOC-10612
      
 
      The hardware manual also shows the output resolutions in progressive output modes. I will be adding further information on the deinterlcarer (I2P) in the hardware manual in the near future.
      
 
      The deinterlacer in the ADV7280, ADV7280-M, ADV7282, ADV7282-M all work on a line doubling rather than on a frame buffering technique. This gives the advantage of reduced delay on the output. Also large external  memory is not needed.
      
 
      The line doubling technique uses a propriety analog devices algorithm. It interpolates between two lines (e.g. lines 1 and 3 on an odd frame) to generate the an additional line (e.g. line 2). A smoothing filter is also applied to reduce the effect of low angle noise (i.e. jaggies).
      
 
      I hope this was of some help to you.
      
 
      regards,
      
 
      Robert Hinchy
      
 
      Applications Engineer,
      
 
      Analog Devices Inc, 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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