Foreword

Introduction

1Scope

2Normative references

3Terms and definitions

4Symbols, operations and abbreviated terms

4.1Symbols

4.2Mathematical operations

4.3Abbreviated terms

5Requirements

5.1Symbology characteristics

5.1.1Basic characteristics

5.1.2Summary of additional features

5.2Symbol structure

5.2.1PDF417 symbol parameters

5.2.2Row parameters

5.2.3Codeword sequence

5.3Basic encodation

5.3.1Symbol character structure

5.3.2Start and stop characters

5.4High level (data) encodation

5.4.1Function codewords

5.4.1.1Function codewords for mode switching

5.4.1.2Function codewords for switching to Extended Channel Interpretations

5.4.1.3Function codewords for Macro PDF417

5.4.1.4Function codeword for reader initialisation

5.4.1.5Function codewords for linkage flags in composite symbols

5.4.2Text Compaction mode

5.4.2.1Text Compaction sub-modes

5.4.2.2Compaction rules for encoding in Text Compaction mode

5.4.2.3Text Compaction sub-mode switching: latch and shift function

5.4.2.4Mechanisms for using a pad in Text Compaction mode

5.4.2.5Switching from Text Compaction mode

5.4.3Byte Compaction mode

5.4.3.1Switching to Byte Compaction mode

5.4.3.2Compaction rules for encoding a single Byte Compaction character (using mode shift 913)

5.4.3.3Compaction rules for encoding longer Byte Compaction character strings (using mode latch 924 or 901)

5.4.3.4Switching from Byte Compaction

5.4.4Numeric Compaction mode

5.4.4.1Latch to Numeric Compaction mode

5.4.4.2Compaction rules for encoding long strings of consecutive numeric digits

5.4.4.3Switching from Numeric Compaction mode

5.4.5Advice to select the appropriate compaction mode

5.4.6Treatment of PDF417 reserved codewords

5.4.6.1Overview

5.4.6.2Making future use of reserved codewords

5.5Extended Channel Interpretation

5.5.1Encoding the ECI assignment number

5.5.2Pre-assigned and default Extended Channel Interpretations

5.5.3Encoding ECI sequences within compaction modes

5.5.3.1ECIs and Text Compaction mode

5.5.3.2ECIs and Byte Compaction mode using mode latch 924 and 901

5.5.3.3ECIs and Byte Compaction using mode shift 913

5.5.3.4ECIs and Numeric Compaction mode

5.5.3.5Combining ECIs

5.5.4Post-decode protocol

5.6Determining the codeword sequence

5.7Error detection and correction

5.7.1Error correction level

5.7.2Error correction capacity

5.7.3Defining the error correction codewords

5.8Dimensions

5.8.1Minimum width of a module (X)

5.8.2Row height (Y)

5.8.3Quiet zones

5.9Defining the symbol format

5.9.1Defining the aspect ratio of the module

5.9.2Defining the symbol matrix of rows and columns

5.10Generating the error correction codewords

5.11Low level encodation

5.11.1Clusters

5.11.2Determining the symbol matrix

5.11.3Determining the values of the left and right row indicators

5.11.3.1Left row indicators

5.11.3.2Right row indicators

5.11.4Row encoding

5.12Compact PDF417

5.13Macro PDF417

5.13.1Compaction modes and Macro PDF417

5.13.2ECIs and Macro PDF417

5.14User guidelines

5.14.1Human readable interpretation

5.14.2Autodiscrimination capability

5.14.3User-defined application parameters

5.14.3.1Symbology and dimensional characteristics

5.14.3.2Test specification

5.14.4PDF417 symbol quality

5.15Reference decode algorithm

5.16Error detection and error correction procedure

5.17Transmitted data

5.17.1Transmitted data in the basic (default) interpretation

5.17.2Transmission protocol for Extended Channel Interpretation (ECI)

5.17.3Transmitted data for Macro PDF417

5.17.4Transmission of reserved codewords using the ECI protocol

5.17.5Symbology identifier

5.17.6Transmission using older protocols

Annex AEncoding/decoding table of PDF417 symbol character bar-space sequences (normative)

Annex BThe default character set for Byte Compaction mode (normative)

Annex CByte Compaction mode encoding algorithm (normative)

Annex DNumeric Compaction mode encoding algorithm (normative)

Annex EUser selection of error correction level (normative)

E.1Recommended minimum error correction level

E.2Other user consideration of the error correction level

Annex FTables of coefficients for calculating PDF417 error correction codewords (normative)

Annex GCompact PDF417 (normative)

G.1Description

G.2Print quality

Annex HMacro PDF417 (normative)

H.1Macro PDF417 overview

H.2Macro PDF417 syntax

H.2.1The segment index

H.2.2File ID field

H.2.3Optional fields

H.2.4Macro PDF417 terminator

H.3High level encoding considerations

H.4Encodation example

H.5Macro PDF417 and the Extended Channel Interpretation protocol

H.5.1Macro PDF417 with ECI 000000 and 000001 (GLI 0 and 1)

H.5.2Macro PDF417 and other ECIs

H.6Macro PDF417 data transmission

H.6.1Operating in buffered mode

H.6.2Operating in unbuffered mode

H.6.3Reset-to-Zero transmissions

Annex ITesting PDF417 symbol quality (normative)

Annex JReference decode algorithm for PDF417 (normative)

J.1General

J.2Initialisation

J.3Reference decode algorithm for line decoding

J.4Filling the matrix

J.5Interpretation

Annex KError correction procedures (normative)

Annex LSymbology identifier (normative)

Annex MTransmission protocol for decoders conforming with original PDF417 standards (normative)

M.1General

M.2Basic Channel mode

M.3GLI encoded symbols

M.4Macro PDF417 symbols

M.4.1Transmission in buffered mode

M.4.2Transmission in unbuffered mode

M.5Transmission of reserved codewords using the original PDF417 protocol

M.6Achieving compatibility between old and new PDF417 equipment

M.6.1Encoders

M.6.2Decoders

Annex NAlgorithm to minimise the number of codewords (informative)

Annex OGuidelines to determine the symbol matrix (informative)

O.1Parameters affecting the determination of the matrix

O.2Guidelines should any parameters not be achieved

Annex PCalculating the coefficients for generating the error correction codewords – worked example (informative)

Annex QGenerating the error correction codewords - worked example (informative)

Annex RDivision circuit procedure for generating error correction codewords (informative)

Annex SAdditional guidelines for the use of PDF417 (informative)

S.1Autodiscrimination compatibility

S.2Pixel-based printing

S.2.1General principles

S.2.2Programmer’s Example

Bibliography