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ADV7170 Obsolete
The ADV7170/ADV7171 is an integrated digital video encoder that converts Digital CCIR-601 4:2:2 8 or 16-bit component video data into a standard analog...
Datasheet
ADV7170 on Analog.com

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ADV7170 progreesive input / interlaced output

		
	
				

			

									
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  •  Analog Employees  

			
			
			    	
			                    
                
				                on Jul 3, 2014 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
I am looking to design a product around the ADV7170 Video encoder.

 
I see from the data sheet that it supports interlaced and none interlaced CVBS output. My question is, can I input a progressive scan format (8 bit YUV) and convert it to interlaced, or does the input have to be interlaced in order for the interlaced output to work,

			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jul 17, 2014 2:21 PM
            
            
						
			            		
    
		
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    Hello Hank,
    
 
    This one seems to have slipped by. ADV7170 is an obsolete product and no support is available. Current encoders would be ADV734X or ADV739X.
    
 
    In any case, none of our encoders will interlace or deinterlace-- it has to be input that way.
    
 
    Dave
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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                on Jul 17, 2014 4:44 PM
            
            
						
			            		
      
		
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      Assuming your progressive source is 60/59.94 hz, you can easily convert it to interlaced by throwing away every other line in each frame and make an interlaced video with the correct HVF timing signals. This can be done on the fly just before the DAC. For example if you are using an FPGA to get video from a frame buffer at 60hz, you can run the video thru a verilog/vhdl module to perform the above.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Aug 2, 2018 10:42 AM
            
            
						
			            		
        
		
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        This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

        Thank you,
        EZ Admin
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
						
						
				
				
		
		
        
			
		
        
	
        

        

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