Storage of compressed data with algorithm
US5280600A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1991 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Nov 18, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a data storage method for storing compressed user data and associated information on magnetic tape. User data from a host computer is organized into a plurality of records. The user data is then compressed according to a compression algorithm. The compressed data and information related to the data compression (DC) algorithm are then stored on magnetic tape. The DC algorithm information pertains to at least one stored record of compressed data and is stored in a record header field. The DC algorithm information may provide for example, an algorithm number and/or an indicator for starting a data dictionary used for data compression and decompression. The user data may further be organized into groups having a group index for incorporating the DC algorithm information. The data records may be further organized into entities having at least one record. The DC algorithm information associated with an entity is incorporated into the group index of the group in which the entity of records is contained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.