DVD EDC check system and method without descrambling sector data
US7134043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Nov 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1803
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A check system and method for checking EDC of a DVD sector without prior descrambling the sector. In the EDC check method, after the sector is received, a check value corresponding to a sector identification (ID) of the sector is generated. Meanwhile, an EDC value of the sector is calculated directly without prior descrambling the sector. Finally, the EDC value and the check value are compared. If the EDC value equals to the check value, a sector-correct signal is outputted; otherwise, a sector-error signal is outputted. Because the EDC check method and system of the invention skip the prior data descrambling step, the processing speed can be improved and the hardware resources may be more-efficiently used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.