PDF417

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Stacking is the structural idea behind PDF417: rows of linear codewords sit one above another, each row carrying start and stop patterns plus a row indicator, so a reader can reassemble the symbol even when rows are scanned out of order or partially missed. Ynjiun Wang designed it at Symbol Technologies in 1991. Capacity reaches 1,850 alphanumeric or 2,710 numeric characters with selectable Reed-Solomon error correction, and the aspect ratio can be varied from 3:1 to 1:3 to suit the available label area. United States driver's licences, airline boarding passes, and a range of government identity documents specify it. Modules are 0.254 mm at nominal size with two-module quiet zones, and binary payloads are supported.

  

  
Ein gestapelter linearer Barcode, der bis zu 1850 alphanumerische Zeichen über mehrere Zeilen codiert, mit integrierter Reed-Solomon-Fehlerkorrektur. PDF417 ist das Standardformat für US-Führerscheine, Bordkarten von Fluggesellschaften und andere amtliche Ausweisdokumente, die eine hohe Datenkapazität in einem druckbaren Format erfordern.

  

  




  

    

    

      

        
PDF417

        
        Stacked
        
      

      
      
      

        Type
        Stacked
      

      
      

      

        Data Length
        variable
      

      
      

      

        Character Set
        Vollständiges ASCII + Binärdaten
      

      
      

      

        Year
        1991
      

      
    

  






  



  

  




  
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Related Terms

  

    
    
      PDF417
    
    
  





  



  



  









  
Häufig gestellte Fragen

  
  

    Was ist ein PDF417-Barcode?
    
PDF417 ist ein gestapelter linearer 2D-Barcode, der bis zu 1.850ASCII- oder 1.108 Bytes Binärdaten in einem rechteckigen Musterkodieren kann.

  

  
  

    Wo wird PDF417 verwendet?
    
PDF417 wird auf US-amerikanischen Führerscheinen (AAMVA-Standard),Flugtickets und staatlichen Ausweisdokumenten verwendet.

  

  
  

    Wie unterscheidet sich PDF417 von QR Code?
    
PDF417 ist ein gestapelter linearer Barcode, der von Laserscannerngelesen werden kann; QR Code ist eine 2D-Matrix, die einen Bildsensorerfordert. PDF417 ist bei denselben Daten größer.