Method and apparatus for providing subsidiary data synchronous to primary content data
US6324694A · kind A · utility
95Cited by
18References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1997 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Sep 5, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/482
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Primary content data is received from an external source and subsidiary data is obtained which corresponds to the primary content data, wherein the subsidiary data is independent of the primary content data. The subsidiary data is provided synchronous to the primary content data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.