Systems and methods for continually updating and retrieving interactive video information
US6357046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1998 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Jun 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An interactive video system transmits a composite digital information signal consisting of a winnowed generic information signal and a local information signal manipulated to produce an output signal including both data code and object code. This output signal is formatted and transmitted via modulator cards at the system head end to decoders located at the individual users' television sets. Each card uses a dynamic gate array having a configuration sequence determined by a resident configuration EPROM which can be changed in the field. Data is fed to the configured array under the control of a control data EPROM also resident in the modulator card. A transmission modulator in the modulator card receives the data from the dynamic gate array for transmission via any selected medium to the user's location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.