Digital data apparatus with datastrip compression and expansion
US4945214A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1987 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Dec 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Digital data apparatus is programmable by means of digital data encoded on one or more datastrips contained on an application insert. In order to substantially increase the amount of digital data in each datastrip, fixed-length digital data is compressed according to a predetermined compression/decompression code to produce variable length data which are then encoded on the datastrip. The disclosed apparatus minimizes the time required (1) to read the encoded data into the digital data apparatus and (2) to decode the encoded data so that the decoded data can be ready to be used. As disclosed, a reader reads the encoded data into digital memory during one pass of the reader over the length of the datastrip and while the reader returns to its starting position, the encoded data is decoded according to the predetermined code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.