Video disc encoding and decoding system providing intra-infield track error correction
US4562487A · kind A · utility
11Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1983 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Dec 30, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S358/907
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video disc track numbers are conveyed during each video line by means of a tri-phase modulation of a data carrier recorded along with the picture and sound carriers on a video disc. Upon playback, the data sequence is processed to identify tracking errors occurring within each video field to thereby enable immediate correction of disc tracking errors on a line-by-line basis thus minimizing picture and sound interruptions caused by intra-field tracking errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.