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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0126965 (1993-09-27) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 203 인용 특허 : 0 |
A nonvolatile electro-optical read-only memory includes a substrate on which is printed (or otherwise inscribed) a complex symbol or “label”with a high density two-dimensional symbology, a variable number of component symbols or “codewords”per row, and a variable number of rows. Codewords in alterna
A nonvolatile electro-optical read-only memory includes a substrate on which is printed (or otherwise inscribed) a complex symbol or “label”with a high density two-dimensional symbology, a variable number of component symbols or “codewords”per row, and a variable number of rows. Codewords in alternating rows are selected from mutually exclusive subsets of a mark pattern such as a (17,4) mark pattern. The subsets are defined in terms of particular values of a discriminator function, which is illustrated as being a function of the widths of bars and spaces in a given codeword. In the illustrated embodiment, each subset includes 929 available codewords; that, plus a two-step method of decoding scanned data, permitting significant flexibility in defining mappings of human-readable symbol sets into codewords. The memory may be used in conjunction with a scanner and a suitable control system in a number of applications, e.g., robotic operations or automated microfilm searching.
An electro-optical computer having a memory comprising: (a) a machine-readable label holding a data file structure made up of a plurality of marks having one of two different states, said data file structure including (i) a plurality of codewords selected from a set of patterns of said marks, wherei
An electro-optical computer having a memory comprising: (a) a machine-readable label holding a data file structure made up of a plurality of marks having one of two different states, said data file structure including (i) a plurality of codewords selected from a set of patterns of said marks, wherein each of said codewords represents at least one information-bearing character, and (ii) at least two rows of said codewords, wherein the codewords in one of said rows are members of a first subset of said set of mark patterns, and the codewords in a second one of the rows are members of a second subset of said set of mark patterns, the first subset of said set of mark patterns being distinguishable from the second subset of said set of mark patterns; (b) a system for reading the label and generating a signal representative of the codewords in said rows, said system being capable of concurrently reading a portion of the codewords from each of the two rows by distinguishing the first and second subsets; and (c) processing means, responsive to said signal, for processing the information-bearing characters in the codewords in said memory.
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