Videotex frame processing
US4751669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1985 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Apr 4, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q30/0283
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A videotex decoder apparatus which, in various aspects, displays a status line to indicate when connect charges are occurring; overlays menus over displayed videotex frames with portions of the displayed frames remaining visible; provides easily called log-on procedures; retrieves remote information frames by user-specified keywords names; prints information frames in selectable different overall sizes; provides selectable different character sets for display; is table-driven; is structured to include a device independent decoder and device dependent drivers; includes a controller which feeds bytes to the decoder for decoding without regard to the protocol-dependent information content of those bytes; and uses an added frame header on stored frames to indicate the videotex protocol for decoding the frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.