How to decode first digit in EAN13?

**WojTec**

I have some EAN13, lets say 6 462456 178322. After digitalize I have:

Code:

First digit is not coded directly in bars. So question is how to compute it, if I have binary data?

**Sir Rufo**

Have a Close Look at

http://de.wikipedia.org/wiki/European_Article_Number

**WojTec**

Yes, I read this. First digit is not coded in barcode, but used to encode "left". Coded are digits 2-13 (each 7 bits + 11 bits for sentinels). So, I have 84 bits. Last 6 digits I can decode by lookup in code table for "right". But to know digits 2-7 I need to know first one. I don't have idea how to get it

**Sir Rufo**

Just compare with the Code-Table

markieren

Code:

			101

0100011 - 4 U

0000101 - 6 G

0011011 - 2 G

0011101 - 4 G

0110001 - 5 U

0101111 - 6 U

01010

1100110 - 1 G

1000100 - 7 G

1001000 - 8 G

1000010 - 3 G

1101100 - 2 G

1101100 - 2 G

101

And after that u have UGGGUU GGGGGG and the Code-Table offers 6

So we have 6 462456 178322

qed

**WojTec**

Oh, now I see, thanks

How to decode first digit in EAN13?

How to decode first digit in EAN13?

AW: How to decode first digit in EAN13?

Re: How to decode first digit in EAN13?

AW: How to decode first digit in EAN13?

Re: How to decode first digit in EAN13?

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WojTec Registriert seit: 17. Mai 2007 480 Beiträge Delphi XE6 Professional	#1 How to decode first digit in EAN13? 16. Aug 2011, 17:14 Delphi-Version: 2010 I have some EAN13, lets say 6 462456 178322. After digitalize I have: markieren Code: 101 0100011 0000101 0011011 0011101 0110001 0101111 01010 1100110 1000100 1001000 1000010 1101100 1101100 101 First digit is not coded directly in bars. So question is how to compute it, if I have binary data?
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Sir Rufo Registriert seit: 5. Jan 2005 Ort: Stadthagen 9.454 Beiträge Delphi 10 Seattle Enterprise	#2 AW: How to decode first digit in EAN13? 16. Aug 2011, 19:02 Have a Close Look at http://de.wikipedia.org/wiki/European_Article_Number Kaum macht man's richtig - schon funktioniert's Zertifikat: Sir Rufo (Fingerprint: ‎ea 0a 4c 14 0d b6 3a a4 c1 c5 b9 dc 90 9d f0 e9 de 13 da 60)
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WojTec Registriert seit: 17. Mai 2007 480 Beiträge Delphi XE6 Professional	#3 Re: How to decode first digit in EAN13? 17. Aug 2011, 09:41 Yes, I read this. First digit is not coded in barcode, but used to encode "left". Coded are digits 2-13 (each 7 bits + 11 bits for sentinels). So, I have 84 bits. Last 6 digits I can decode by lookup in code table for "right". But to know digits 2-7 I need to know first one. I don't have idea how to get it
	Zitat

WojTec Registriert seit: 17. Mai 2007 480 Beiträge Delphi XE6 Professional	#5 Re: How to decode first digit in EAN13? 17. Aug 2011, 11:04 Oh, now I see, thanks
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