Method for processing teletext data transmitted in a television signal
US5654763A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Jul 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0357
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to increase decoding safety of the address frame of a teletext page during the reception of teletext data, and in particular of a page containing higher level supplementary data, without having to apply additional error control steps, the address frame for a teletext row is forecast from the decoded material, and if required, with a corrected address frame of the preceding teletext row. The forecast address frame is compared with the actually received address frame of the succeeding teletext row. If a deviation at two or more information units of a byte are detected during the comparison, and if required during decoding of the received address frame, the forecast address frame is used instead of the received address frame for addressing the data stream of the concerned teletext row.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.