Method of recording and reproducing picture information, recording medium, and recording medium playing apparatus
US4994925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1988 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Sep 23, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method of recording and reproducing picture information and a recording medium on which the picture information is recorded by the method, and an apparatus for playing such a recording medium. In addition to a coded information signal, graphic codes including picture information and audio codes made up of codes by which data can be compressed at a compression rate higher than that of the coded information signal. The graphic codes and said audio codes are inserted as the subcode of the coded information signal together with identification codes indicating whether the codes include the picture information or the audio information. At the time of playback of the recording medium, the subcode is demodulated in accordance with the identification codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.