Digital
US5905524A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1997 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Aug 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13376
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Creation of a digital ISDN server for distribution and interactive services in video telephony, which can be used for a great number of video telephones including video telephones of different designs. Provision of video and audio signals with different formats and different transmission rates for different video telephones. Signalling of a terminal (TN1, . . . , TNp) is provided by the server for each requesting video telephone, where coded video and audio signals of different transmission rates and different formats are provided according to the design of the video telephone. These are available either in real time or are downloaded from corresponding storage media. In addition, an interactive control can be implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.