Location dependent variable error correction processing for multi-track recording media using variable length coding means
US5487077A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | May 23, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1258
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The error correction code capability of the linear recording density of a zone of contiguous recording tracks on a surface or volume having at lest two zones of different average linear recording density is adjusted. Each zone has associated therewith a parameter pair (r,R) defining the number of error correction bytes r to be appended to data blocks to form a codeword written to tracks within the zone and the number R.ltoreq.(r/2-1) of correctable errors in the event of a non-zero remainder detected upon readback of a codeword from a track within the zone. The r parameter controls the length of a shift register type encoder syndrome generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.