Framing codes for robust synchronization and addressing of self-

Details Framing codes for robust synchronization and addressing of self- Framing codes for robust synchronization and addressing of self-

1995-10-27

1996-05-28

Hajec, Donald T.

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235454, G06K 1906

Patent

active

055213723

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.

REFERENCES:
patent: 4924078 (1990-05-01), Sant'Anselmo et al.
patent: 5128525 (1992-07-01), Stearns
patent: 5168147 (1992-12-01), Bloomberg
patent: 5221833 (1993-06-01), Hecht
patent: 5449895 (1995-09-01), Hecht
patent: 5449896 (1995-09-01), Hecht

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