Explanation for QR code cError correction level

(16)Explanation for the PDF417 and MicroPDF417 cSecurity level

The PDF417 contains a function to correct a code reading error using an error correcting code word and restore normal data. The security level should be designated according to usage to perform the error correction function.

For the MicroPDF417, the printer sets the security level automatically.

Security level	Error Correction Ability		No. of error correction
Security level	Error Correction Ability		code words
			code words

Level 0			0
Level 0		Low	0
Level 1		Low	2
Level 2			6
Level 3			14
Level 4			30
Level 5			62
Level 6			126
Level 7		High	254
Level 8			510
Level 8			510

dNo. of columns (strings)

The number of rows is variable in the PDF417. The row length (No. of data strings) is also variable. Therefore, a symbol can be created in a form that can be easily printed, by changing the proportion of the height and width.

The number of columns (data strings) is variable between 1 and 30.

If the number of columns is small when data amount is large and security level is high, drawing may not be performed. This is because the number of rows exceeds 90 when the number of columns becomes small. (When the PDF417 is used, the number of rows of symbols is limited from 3 to 90.)

For the MicroPDF417, not only the number of columns (data strings) but also the number of rows (data lines) can be designated. When these are to be designated, see the table on page 72. Note that the max. number of digits for the set parameter (gg) varies according to the character type. If data over the max. number of digits for the set parameter (gg) is set, the bar code is not printed. The number of columns (data strings) is variable from 1 to 4.

However, the max. number of lines, which is 44, depends on the number of columns.

(17)Explanation for QR code cError correction level

The QR code contains functions to detect and correct an error. If one of the data characters is damaged, the information can be restored when this code is read.

There are 4 levels that can be designated. The level should be specified according to usage. The general correction ability is as follows.

Level	Error correction ability	Overhead by correcting
Level	Error correction ability	an error
		an error

High density level	Low	7%

Standard level		15%

Reliability level		25%

High reliability level	High	30%

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GC10-QM, B-SV4D-GS specifications

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Toshiba GC10-QM, B-SV4D-GS manual Explanation for QR code cError correction level

Models: GC10-QM B-SV4D-GS

(17)Explanation for QR code cError correction level

GC10-QM, B-SV4D-GS specifications