Explicit synchronization for self-clocking glyph codes

An optically readable record for storing encoded information;

• said record comprising
• a recording medium;
• a self-clocking data code for encoding said information;
• said data code being composed of data glyphs that are written on said recording medium on centers that are spatially distributed in nominal accordance with a two dimensional spatial formatting rule;
• said data glyphs being defined by respective symbols that are selected from a finite set of optically discriminable symbols to encode said information;
• and
• at least one self-clocking synchronization code for establishing a persistent spatial reference for said data code;
• said synchronization code being discriminable from said data code and being composed of additional glyphs that are written on said recording medium in nominal accordance with said spatial formatting rule plus at least one additional rule that establishes a predetermined geometric relationship among the glyphs of the synchronization code and said data glyphs, whereby the logical ordering of at least some of the data glyphs is inferable from their geometric relationship to the glyphs of the synchronization code.

An optically readable record for storing encoded information;

• said record comprising
• a recording medium;
• a self-clocking glyph code for storing said information on said recording medium;
• said glyph code being composed of a data code and at least one a synchronization pattern for providing a persistent spatial reference for said data code
• said data code being composed of a first logically ordered set of discrete data glyphs that are written on said recording medium on spatially offset centers in nominal accordance with a two dimensional spatial formatting rule;
• said data glyphs being defined by respective symbols that are selected from a finite set of optically discriminable symbols to encode said information;
• and
• said synchronization pattern being discriminable from said data code and being composed of a second logically ordered set of glyphs that are written on said recording medium in nominal accordance with said spatial formatting rule plus at least one additional rule that establishes a predetermined geometric relationship among the glyphs of the synchronization pattern and said data glyphs, whereby the logical ordering of at least some of the data glyphs is inferable from their geometric relationship to the glyphs of the synchronization pattern.

An optically readable record for storing encoded information;

• said record comprising
• a recording medium;
• a self-clocking data code for encoding said information;
• said data code being composed of data glyphs that are written on said recording medium on centers that are spatially distributed in nominal accordance with a two dimensional spatial formatting rule;
• said data glyphs being defined by respective symbols that are selected from a finite set of optically discriminable symbols to encode said information;
• and
• a synchronization code pattern composed of at least two intersecting nonparallel synchronization code subpatterns for establishing a two dimensional, persistent spatial reference for said data code, each of said synchronization patterns being discriminable from said data code and being composed of glyphs that are written on said recording medium in accordance with said spatial formatting rule plus at least one additional rule that establishes a predetermined geometric relationship between the glyphs of the said synchronization patterns and said data glyphs, whereby the logical ordering of at least some of the data glyphs is inferable from their geometric relationship to the glyphs of the synchronization patterns.