Method for accessing and updating a library of optical discs
US5884298A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99953
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method accesses and updates information from a library of optical discs and includes a step of cataloging optical discs. The cataloging step includes the generation of a unique value for each of the cataloged discs. The unique value is produced by iteratively reading data from each disc and iteratively combining the data. The cataloging step includes the generation of catalog data streams. The catalog data streams include fixed length data representing file and directory attributes and variable length data representing file names and directory names. The method includes the further step of producing limited depth catalogs representing file and directory information on the optical discs. The limited depth catalogs have a fixed number of subdirectory levels and file types. The fixed number is selected by a user, and the file types are selected by a user. The method includes the further step of caching optical disc data to a hard disc. The cached data are written to the hard disc when the optical disc data are requested more frequently than other optical disc data. The requests are monitored by a caching file system. The caching file system determines when the requests for data can …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.