Framing codes for robust synchronization and addressing of self-clocking glyph codes
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United States of America Patent
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May 28, 1996
Issued Date -
N/A
app pub date -
Oct 27, 1995
filing date -
Dec 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optically readable record for storing encoded information comprises (1) a recording medium, (2) a self-clocking data code for encoding the information, with this data code being composed of glyphs that are written in a two dimensional code field on the recording medium on centers that are spatially distributed in nominal accordance with a predetermined spatial formatting rule, where the glyphs are defined by respective symbols that are selected from a finite set of optically discriminable symbols to encode the information, and (3) a self-clocking synchronization code pattern that is written on the recording medium to fully frame at least a portion of the data code, with this the synchronization code pattern defining multiple paths of self-clocking glyphs for reaching any given glyph of synchronization code pattern from any other glyph thereof.
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