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US 5,572,010 AGranted
Distributed type labeling for embedded data blocks
AssigneeXerox Corporation
InventorGlen W. Petrie
Life of this patent
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Abstract
Recognizable codes, such as pseudo-noise ("PN") sequence address codes, are employed for type labeling embedded data patterns, such as self-clocking glyph code patterns. For example, this type labeling may be employed to identify structurally distinguished data block types.
Claims9
A two dimensional embedded data block for storing machine readable information on a recording medium;
- said embedded data block comprising a lattice-like synchronization frame composed of embedded data characters for encoding a recognizable address code, said code being selected to provide a type label for said data block and for distinguishing said data block from different data block types.
A process for type labeling different two dimensional embedded data patterns, each of said embedded data patterns having a lattice-like sync frame composed of spatially distributed embedded data characters;
- said process comprising the steps of
- correlating each embedded data pattern type with a unique identification code that distinguishes it from all other embedded data pattern types, and;
- encoding the identification code that is type correlated with a given embedded data pattern in the sync frame of said given data pattern, thereby applying a distributed type label to the given data pattern.
Dependencies are inferred from the claim text.