Multipoint teleconference system employing H. 221 frames
US5402418A · kind A · utility
54Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1992 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jul 15, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13337
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multipoint teleconference system dispensing with an MCU, in which terminals are connected into a loop configuration through an ISDN in such a way that each terminal is coupled with each of the adjacent terminals by a single B channel. Thus, a communication frame is revolved through a looped communication channel. Each terminal enters control information for controlling a multipoint teleconference, into a predetermined area within the communication frame, and it relays the resulting communication frame to the next terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.