Digital information recording and reproducing system and defect managing system applied to the same
US6327674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Dec 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording and reproducing system has a computer data table and an audio visual data table as address conversion tables for managing addresses necessary for a process in response to an access command for record or reproduction transmitted from a host system to a recording medium. When a defective block occurs, in case of computer data, a substitute block is used and the physical address of the defective block in the computer data table is rewritten to the physical address of the substitute block. In case of audio visual data, the data is written in the defective block and the physical address of the defective block in the audio visual data table is maintained. In response to an access command from the host system, the recording and reproducing system executes an access process to the recording medium with reference to the computer data table or the audio visual data table, in accordance with the kind of data to be accessed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.