Decoding apparatus and method of optical information reproducing system
US7480224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2005 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Jul 31, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention discloses a decoding apparatus and the method thereof for decoding a signal retrieved by an optical information reproducing system from an optical information recording medium. N legal codes are predetermined. According to the invention, first, the retrieved signal is converted into a data stream. Then, in a Viterbi decoding manner, the data stream is decoded into a digital code in accordance with a level of the data stream and N reference levels. Then, the binary code is decoded by a binary array into one of the N legal codes, and each of the N legal codes corresponds to one of N reference levels. In particular, the N reference levels are corrected by various detected conditions to enhance the correctness of decoded data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.