Track calculation method for fixing track jumps of optical discs of different capacities
US7619952B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2008 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Jun 13, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An appropriate track calculation equation is inducted according to a relationship between a storage area and a track pitch of a compact disc, and a pickup unit is instantly shifted to a location calculated with the track calculation equation. Therefore, an error after performing a track jump modulation is reduced to a smallest degree, and in other words, the pickup unit may access a location on the disc currently required by a user without frequent or time-consuming long seeks. As a result, when the pickup unit accesses compact discs having unknown formats, which indicate different capacities or properties, a track error may be calculated in a shortest time so as to shift the pickup unit accordingly and to fix track jumps, and the user may browse any location on the compact discs having unknown formats smoothly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.