Apparatus for detecting and displaying supplementary program
US5880789A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/472
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A teletext/data transmission decoder decodes information on characters and graphics and produces a supplementary program video signal. A proper program video signal arriving by way of a video processing circuit and a display image processing section and the supplementary program video signal coming from the decoder are synthetically combined by a synthesizing section and fed to a display unit. A system controller sets the decoder in a waiting state. If the proper program video signal contains data information, the system controller automatically starts a decoding operation and controls the synthesizing section to display the restored signal on the display unit. When an automatic display select switch is set to an automatic display mode, a supplementary program processing mode is automatically selected when a supplementary program is started.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.