Method and related apparatus for evaluating beta-parameter according to write-in result of portion of write-in data with specific content while performing optimal power control of optical disk drive
US7145853B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Jun 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When performing OPC, data including a plurality of first sequences and second sequences with specified contents are written onto the optical disk. A read result corresponding to the written data is then read. The read result is high-pass filtered such that effects corresponding to the second sequences are contained in a portion of the read result corresponding to the first sequences. Since the first sequences have specified contents, the portion of the read result corresponding to the first sequences are detected, and the beta-parameter is evaluated only according to the portion of the read result corresponding to the first sequences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.