A teleconferencing audio bridge.
Abstract
An arrangement for a teleconferencing bridge (108) allows one or more users (101-106) to control at least one characteristic of at least some of the input signals received by the bridge, such that the output signals received by each user in a teleconference is a user-controlled combination of all the input signals, including the changed input signals. The arrangement allows a rich set of audio bridging features to be provided cost-effectively. Those features include subconferencing, monitoring, whispering, muting, complex gain control, and pseudo stereo.

Term
Term ended
Projected expiry passed 19 April 2015, 11.4 years ago.
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1 sheet
Sheet 1
Every citation, both waysCites: the store holds 2 of 3
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| US4558180A | Cites | United States of America | X | Search report | 1-22 |
| US4730306A | Cites | United States of America | A | Search report | 1-22 |
| LAWRENCE BARANYAI: "DIGITAL MULTIPOINT TELECONFERENCING FOR SPECIAL SERVICE CIRCUITS", IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE-GLOBECOM 83, vol. 1, 28 November 1983 (1983-11-28) - 1 December 1983 (1983-12-01), SAN DIEGO (US), pages 548 - 553 | Non-patent | – | – | Search report | – |
| DAVID N. HORN ET AL: "A VERSATILE AUDIO BRIDGE FOR MULTIMEDIA CONFERENCING", SUPERCOMM ICC 94, 1 May 1994 (1994-05-01) - 5 May 1994 (1994-05-05), NEW ORLEANS (US), pages 1754 - 1762, XP000438793 | Non-patent | – | – | Search report | – |
9 members in 5 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 236790 | United States of America | – | |
| 23679094 | United States of America | A | |
| 23679094 | United States of America | A | |
| US19940236790 | – | – | – |
Members9
| Document | Office | Kind | |
|---|---|---|---|
| CA2143591A1 | Canada | A1 | |
| EP0680190A2 | European Patent Office (EPO) | A2 | |
| JPH07303147A | Japan | A | |
| EP0680190A3This record | European Patent Office (EPO) | A3 | |
| CA2143591C | Canada | C | |
| US6178237B1 | United States of America | B1 | |
| EP0680190B1 | European Patent Office (EPO) | B1 | |
| DE69526135D1 | Germany | D1 | |
| DE69526135T2 | Germany | T2 |
33 legal events, as 5 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Patent expired after termination of 20 yearsExpiredPE20 | PE20 | GB | |
| Discontinued because of reaching the maximum lifetime of a patentV4 | V4 | NL | |
| Expiry of rightR071 | R071 | DE | |
| Expiry of rightR071 | R071 | DE | |
| Lien (pledge) cancelledRG | RG | FR | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Lien (pledge) constitutedGC | GC | FR | |
| Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)REGISTERED BETWEEN 20140109 AND 20140115732E | 732E | GB | |
| Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)REGISTERED BETWEEN 20140102 AND 20140108732E | 732E | GB | |
| Change of name or company nameCD | CD | FR | |
| Transmission of propertyTP | TP | FR | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| European patent in force as of 2002-01-01IF02 | IF02 | GB | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0680190
- Publication, DOCDB
- 0680190
- Publication, EPODOC
- EP0680190
- Application
- 95302577
- Application, DOCDB
- 95302577
- Application, EPODOC
- EP19950302577
Titles3
- German
- Eine Audiotelekonferenzbrücke
- English
- A teleconferencing audio bridge
- French
- Un pont d'audiotéléconférence
Classification
- CPC, 6
- H04M3/564
- H04M3/40
- H04M3/56
- H04M3/567
- H04M3/568
- H04M2201/38
- IPC, 2
- H04M3 40
- H04M3 56
Designated states1
- Contracting states, 1
- Netherlands (Kingdom of the)