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ISS SuperCode

SuperCode is a public-domain 2D symbology invented by Ynjiun Wang in 1994, using a flexible packet structure with Reed-Solomon error correction and support for non-rectangular symbol shapes.

Introduction

SuperCode was invented by Ynjiun Wang in 1994 and is in the public domain. The symbology uses a packet structure, a variant of a multi-row symbology. There are precise rules for the horizontal placement of symbol characters within a packet, but greater freedom in placing packets vertically and horizontally than is offered by the matrix of columns and rows in a conventional multi-row symbology.

The packet structure of SuperCode ensures that each symbol character encoding a data or error-correction codeword is adjacent to a symbol character encoding the packet address. This means the sequence of codewords is known regardless of how the packets are arranged. Not only does this allow for non-rectangular symbol shapes, but the packets also do not need to physically abut one another.

Features
  • Packet Structure (Inherent): The packet structure of SuperCode ensures that each symbol character encoding a data or error-correction codeword is adjacent to a symbol character encoding the packet address. The sequence of codewords is therefore known no matter how the packets are spatially arranged. This allows non-rectangular symbol shapes, and the packets do not need to physically abut one another.
  • Error Correction (Inherent): SuperCode symbols include error-correction codewords based on Reed-Solomon algorithms, which can be used not only to detect errors but also to correct erroneously decoded or missing codewords. A user may select one of 32 error-correction levels.
  • Extended Channel Interpretations (ECI) (Optional): This mechanism enables characters from other character sets (e.g., Arabic, Cyrillic, Greek, Hebrew) and other data interpretations or industry-specific requirements to be represented.
  • Logical Layer Designator (LLD) (Inherent): This mechanism allows for various structures within the symbol. Five Logical Layer Designators are specified; one LLD is allocated to the ECI scheme, which is common to a number of symbologies.

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