Patent US5611575A successfully refreshed from Google Patents.
US5611575A
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Distributed state flags or other unordered information for embedded data blocks
Assignee: Xerox Corp
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Filing: 1995-01-03
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Granted: 1997-03-18
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Expires: 2015-01-03
Abstract
Abstract An embedded data block for storing machine readable information on a recording medium has a lattice-like sync frame which defines the outer boundaries of individual, fixed-size frame blocks. Flags, which are encoded by embedded data characters on the sync frame, indicate whether there are any special processing instructions (e.g., user-specific or application-specific instructions for customizing the processing of the data block) encoded within the frame blocks.
Inventors
- 👤 Glen W. Petrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
G; G06; G06T; G06T1/00; G06T1/0021; G06T1/0028; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06037; G06K7/00; G06K7/10; G06K7/14; G06K7/1404; G06K7/1408; G06K7/143; G06T2201/00; G06T2201/005; G06T2201/0051; G06T2201/0081; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
A two dimensional embedded data block for storing machine readable information on a recording medium; said embedded data block comprising a synchronization frame including at least on embedded data character for encoding a flag; said flag having one state when said embedded data block contains an optional special processing codeword and a second state in the absence of such a codeword; said special processing codeword being reserved for encoding custom instructions for processing said embedded data block.
Claim 2
Dependent Claim
77 words
A two dimensional embedded data block for storing machine readable information on a recording medium; said embedded data block comprising a synchronization frame including at least on embedded data character for encoding a flag; said flag having one state when said embedded data block contains an optional special processing codeword and a second state in the absence of such a codeword; said special processing codeword being reserved for encoding custom instructions for processing said embedded data block.
Claim 3
Dependent Claim
19 words
The embedded data block of claim 1 wherein said embedded data block is composed of a self-clocking glyph code.
Claim 4
Dependent Claim
29 words
The embedded data block of claim 2 wherein said glyph code is composed of slash-like symbols, said symbols being written on said recording medium on substantially uniformly spaced centers.
Claim 5
Dependent Claim
23 words
The embedded data block of claim 3 wherein said glyph code has a substantially uniform grayscale appearance when viewed under ordinary viewing conditions.
Claim 6
Dependent Claim
103 words
A process for recording machine readable information on a recording medium, said process comprising the steps of encoding said information in a two-dimensional embedded data block, said embedded data block being composed of embedded data characters, including characters that define a synchronization frame; and encoding at least one of the embedded data characters on said synchronization frame to provide a flag which has one state when said embedded data block contains an optional special processing codeword and a second state in the absence of such a codeword; said special processing codeword being reserved for encoding custom instructions for processing said embedded data block.
Claim 7
Dependent Claim
103 words
A process for recording machine readable information on a recording medium, said process comprising the steps of encoding said information in a two-dimensional embedded data block, said embedded data block being composed of embedded data characters, including characters that define a synchronization frame; and encoding at least one of the embedded data characters on said synchronization frame to provide a flag which has one state when said embedded data block contains an optional special processing codeword and a second state in the absence of such a codeword; said special processing codeword being reserved for encoding custom instructions for processing said embedded data block.
Claim 8
Dependent Claim
19 words
The embedded data block of claim 5 wherein said embedded data block is composed of a self-clocking glyph code.
Claim 9
Dependent Claim
29 words
The embedded data block of claim 6 wherein said glyph code is composed of slash-like symbols, said symbols being written on said recording medium on substantially uniformly spaced centers.
Claim 10
Dependent Claim
23 words
The embedded data block of claim 7 wherein said glyph code has a substantially uniform grayscale appearance when viewed under ordinary viewing conditions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-03-17 | 2000-09-16 | 2001-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-17 | 2004-09-16 | 2005-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-17 | 2008-09-16 | 2009-03-18 | $7700.00 | Window Closed / Lapsed |