Conference bridge for speech packet networks.
Abstract
A conference bridge is disclosed that receives speech data in the form of data packets, and transmits data in the same form, without transforming the data in the conference bridge. The conference bridge includes a plurality of inputs that have speech detectors that detect the presence of speech data. The speech detectors report the presence of speech to a controller. The controller causes data packets from one of the inputs detecting speech to be replicated for all outputs. If there is speech at more than one input at a time, then a decision is made as to which input to replicate. Advantageously, the decision is based on who the loudest speaker is. Further, the data that is replicated is not sent to the output for the originator in order to prevent echo.

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Projected expiry passed 8 March 2015, 11.5 years ago.
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1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| GB2238934A | Cites | United Kingdom | Y | Search report | 1,4,5 |
| US4466093A | Cites | United States of America | A | Search report | 7 |
| US4937856A | Cites | United States of America | A | Search report | 1,5 |
3 priority claims, no other members on record
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 214724 | United States of America | – | |
| 21472494 | United States of America | A | |
| US19940214724 | – | – | – |
35 legal events, as 4 offices reported them to INPADOC
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| 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 | |
| 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 | |
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| Lien (pledge) constitutedGC | GC | FR | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| 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 | |
| Fr: translation filedET | ET | 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 | |
| Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents actLapsedNLV1 | NLV1 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS | GRAS | EP | |
| Title (correction)CONFERENCE BRIDGE FOR SPEECH PACKET NETWORKS AND CORRESPONDING METHODRTI1 | RTI1 | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP | GRAP | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Information provided on ipc code assigned before grant6H 04L 12/64 A, 6H 04M 3/56 B, 6H 04Q 11/04 BRIC1 | RIC1 | 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
- 0677942
- Publication, DOCDB
- 0677942
- Publication, EPODOC
- EP0677942
- Application
- 95301492
- Application, DOCDB
- 95301492
- Application, EPODOC
- EP19950301492
Titles3
- German
- Konferenzbrücke für Sprach-Paketnetze
- English
- Conference bridge for speech packet networks
- French
- Pont de conférence pour des réseaux de paquets vocaux
Classification
- CPC, 8
- H04M3/569
- H04L12/6418
- H04L2012/5642
- H04L2012/5643
- H04L2012/5671
- H04L2012/6481
- H04M3/56
- H04Q11/0478
- IPC, 4
- H04L12 56
- H04L12 64
- H04M3 56
- H04Q11 04
Designated states7
- Contracting states, 7
- Germany
- Spain
- France
- United Kingdom
- Italy
- Netherlands (Kingdom of the)
- Sweden