Digital signal recording and reproducing apparatus and error-correcting apparatus
US5587803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | May 2, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/877
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Fast speed playback is performed with a reduced error-correcting capability as compared with that for normal speed playback. Information of K symbols is encoded with a first error-correcting code C1 and appended with (N-K) check symbols. After that, m symbols out of the check symbols are punctured, and the information of K symbols is divided into a block of K.sub.1 symbols and a block of K.sub.2 symbols, the block of K.sub.1 symbols being further encoded with a second error-correcting code Cm and appended with m.sub.1 check symbols for error correction. For efficient error-correction coding of auxiliary data which is usually not used but which becomes necessary on occasions, the presence or absence of auxiliary data is written in ID information, and the number of error-correcting check symbols is changed accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.