GB2319138B - Teleconferencing system - Google Patents
Teleconferencing systemInfo
- Publication number
- GB2319138B GB2319138B GB9802092A GB9802092A GB2319138B GB 2319138 B GB2319138 B GB 2319138B GB 9802092 A GB9802092 A GB 9802092A GB 9802092 A GB9802092 A GB 9802092A GB 2319138 B GB2319138 B GB 2319138B
- Authority
- GB
- United Kingdom
- Prior art keywords
- video
- audio
- data
- workstations
- wan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 235000008694 Humulus lupulus Nutrition 0.000 abstract 1
- 230000006837 decompression Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/10—Office automation; Time management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
- H04L12/1827—Network arrangements for conference optimisation or adaptation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/403—Arrangements for multi-party communication, e.g. for conferences
- H04L65/4038—Arrangements for multi-party communication, e.g. for conferences with floor control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/75—Indicating network or usage conditions on the user display
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
- H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
- H04M3/5307—Centralised arrangements for recording incoming messages, i.e. mailbox systems for recording messages comprising any combination of audio and non-audio components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/563—User guidance or feature selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/567—Multimedia conference systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
- H04N7/152—Multipoint control units therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1836—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with heterogeneous network architecture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/42—Graphical user interfaces
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/20—Aspects of automatic or semi-automatic exchanges related to features of supplementary services
- H04M2203/2044—Group features, e.g. closed user group
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/50—Aspects of automatic or semi-automatic exchanges related to audio conference
- H04M2203/5009—Adding a party to an existing conference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/50—Aspects of automatic or semi-automatic exchanges related to audio conference
- H04M2203/5018—Initiating a conference during a two-party conversation, i.e. three-party service or three-way call
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42221—Conversation recording systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
- H04M3/42323—PBX's with CTI arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/428—Arrangements for placing incoming calls on hold
- H04M3/4285—Notifying, informing or entertaining a held party while on hold, e.g. Music On Hold
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
- H04M3/493—Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
- H04M3/4931—Directory assistance systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1305—Software aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13093—Personal computer, PC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13175—Graphical user interface [GUI], WWW interface, visual indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1319—Amplifier, attenuation circuit, echo suppressor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1322—PBX
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1324—Conference call
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1326—Consultation call, broker's call, call hold, toggling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1332—Logic circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13337—Picturephone, videotelephony
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13389—LAN, internet
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Human Resources & Organizations (AREA)
- Strategic Management (AREA)
- Entrepreneurship & Innovation (AREA)
- Economics (AREA)
- Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Marketing (AREA)
- Operations Research (AREA)
- Quality & Reliability (AREA)
- Tourism & Hospitality (AREA)
- Data Mining & Analysis (AREA)
- General Business, Economics & Management (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Telephonic Communication Services (AREA)
Abstract
A teleconferencing system that integrates separate real-time and asynchronous networks the former for real-time audio and video, and the latter for control signals and textual, graphical and other data - in a manner which closely approximates the experience of face-to-face collaboration. The system provides an audio/video (AV) path 13 for carrying AV signal among the workstations, a video mosaic generator (36) for combining images, and an audio summer or mixer 38. The system architecture is readily scalable to the largest enterprise network environments. It accommodates differing levels of collaborative capabilities available to individual users and permits high-quality audio and video capabilities(Figs 2A,2B,8C) to be readily superimposed onto existing personal computers and workstations 12 and their interconnecting LANs 10 and WANs 15. In the case of a plurality of geographically dispersed LANs 10 interconnected by a WAN 15, the demands made on the WAN are significantly reduced by employing multi-hopping techniques, including avoiding the unnecessary decompression of data at intermediate hops, as well as video mosaicing and cut-and-paste technology. This application discloses separate data and video network paths as well as the facility for storing and forwarding multimedia mail messages.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/131,523 US5689641A (en) | 1993-10-01 | 1993-10-01 | Multimedia collaboration system arrangement for routing compressed AV signal through a participant site without decompressing the AV signal |
GB9410665A GB2282506B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9802092D0 GB9802092D0 (en) | 1998-03-25 |
GB2319138A GB2319138A (en) | 1998-05-13 |
GB2319138B true GB2319138B (en) | 1998-06-24 |
Family
ID=26304951
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9802092A Expired - Lifetime GB2319138B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
GB9802084A Expired - Lifetime GB2319136B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
GB9802089A Expired - Lifetime GB2319137B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
GB9802081A Expired - Lifetime GB2319135B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9802084A Expired - Lifetime GB2319136B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
GB9802089A Expired - Lifetime GB2319137B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
GB9802081A Expired - Lifetime GB2319135B (en) | 1993-10-01 | 1994-05-27 | Teleconferencing system |
Country Status (1)
Country | Link |
---|---|
GB (4) | GB2319138B (en) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2172378B1 (en) * | 1999-05-14 | 2003-12-16 | Gili Monica Socias | MULTIPLE TELECOMMUNICATIONS MACHINE FOR COMMON, PUBLIC AND / OR PRIVATE USE |
EP1202192A1 (en) * | 1999-05-14 | 2002-05-02 | Monica Socias Gili | Multiple telecommunications machine for common, public and/or private use |
AU6137400A (en) * | 1999-10-04 | 2001-04-05 | Actv, Inc. | Enhanced video programming apparatus and method providing a shared whiteboard |
US6832245B1 (en) | 1999-12-01 | 2004-12-14 | At&T Corp. | System and method for analyzing communications of user messages to rank users and contacts based on message content |
US6678719B1 (en) * | 1999-12-20 | 2004-01-13 | Mediaone Group, Inc. | Virtual workplace intercommunication tool |
CA2336577A1 (en) * | 2000-02-16 | 2001-08-16 | Siemens Corporate Research, Inc. | Systems and methods for generating and playback of annotated multimedia presentation |
EP1264469B1 (en) | 2000-03-17 | 2008-01-16 | America Online, Inc. | Instant messaging with additional voice communication |
US9356894B2 (en) | 2000-05-04 | 2016-05-31 | Facebook, Inc. | Enabled and disabled menu choices based on presence state |
US7979802B1 (en) | 2000-05-04 | 2011-07-12 | Aol Inc. | Providing supplemental contact information corresponding to a referenced individual |
US9043418B2 (en) | 2000-05-04 | 2015-05-26 | Facebook, Inc. | Systems and methods for instant messaging persons referenced in an electronic message |
US8122363B1 (en) | 2000-05-04 | 2012-02-21 | Aol Inc. | Presence status indicator |
US9100221B2 (en) | 2000-05-04 | 2015-08-04 | Facebook, Inc. | Systems for messaging senders and recipients of an electronic message |
US6912564B1 (en) | 2000-05-04 | 2005-06-28 | America Online, Inc. | System for instant messaging the sender and recipients of an e-mail message |
US8132110B1 (en) | 2000-05-04 | 2012-03-06 | Aol Inc. | Intelligently enabled menu choices based on online presence state in address book |
US8001190B2 (en) | 2001-06-25 | 2011-08-16 | Aol Inc. | Email integrated instant messaging |
ATE502477T1 (en) | 2000-07-25 | 2011-04-15 | America Online Inc | VIDEO MESSAGING |
US6961754B2 (en) | 2001-01-12 | 2005-11-01 | Telefonaktiebolaget Lm Ericsson | Interactive access, manipulation, sharing and exchange of multimedia data |
DE10138267A1 (en) * | 2001-08-03 | 2003-02-20 | Siemens Ag | Method and terminal device for multipoint communication |
US7774711B2 (en) | 2001-09-28 | 2010-08-10 | Aol Inc. | Automatic categorization of entries in a contact list |
US7512652B1 (en) | 2001-09-28 | 2009-03-31 | Aol Llc, A Delaware Limited Liability Company | Passive personalization of buddy lists |
US7716287B2 (en) | 2004-03-05 | 2010-05-11 | Aol Inc. | Organizing entries in participant lists based on communications strengths |
JP2004032372A (en) * | 2002-06-26 | 2004-01-29 | Fuji Photo Film Co Ltd | Image data processing method, portable terminal device and program |
US7362349B2 (en) | 2002-07-10 | 2008-04-22 | Seiko Epson Corporation | Multi-participant conference system with controllable content delivery using a client monitor back-channel |
CN1268122C (en) | 2002-07-23 | 2006-08-02 | 精工爱普生株式会社 | Display system, network answering display device, terminal apparatus and controlling program |
US7945674B2 (en) | 2003-04-02 | 2011-05-17 | Aol Inc. | Degrees of separation for handling communications |
US9742615B1 (en) | 2002-12-31 | 2017-08-22 | Aol Inc. | Popularity index |
US7263614B2 (en) | 2002-12-31 | 2007-08-28 | Aol Llc | Implicit access for communications pathway |
US8117265B2 (en) | 2003-03-26 | 2012-02-14 | Aol Inc. | Identifying and using identities deemed to be known to a user |
US20040230655A1 (en) * | 2003-05-16 | 2004-11-18 | Chia-Hsin Li | Method and system for media playback architecture |
US7558221B2 (en) | 2004-02-13 | 2009-07-07 | Seiko Epson Corporation | Method and system for recording videoconference data |
US8595146B1 (en) | 2004-03-15 | 2013-11-26 | Aol Inc. | Social networking permissions |
US8275109B2 (en) | 2009-03-31 | 2012-09-25 | International Business Machines Corporation | Administering participant attendance of teleconferences |
US8391455B2 (en) * | 2010-03-17 | 2013-03-05 | Avaya Inc. | Method and system for live collaborative tagging of audio conferences |
US11134217B1 (en) | 2021-01-11 | 2021-09-28 | Surendra Goel | System that provides video conferencing with accent modification and multiple video overlaying |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4686698A (en) * | 1985-04-08 | 1987-08-11 | Datapoint Corporation | Workstation for interfacing with a video conferencing network |
US4953159A (en) * | 1989-01-03 | 1990-08-28 | American Telephone And Telegraph Company | Audiographics conferencing arrangement |
WO1992021211A1 (en) * | 1991-05-21 | 1992-11-26 | Videotelecom Corp. | A multiple medium message recording system |
WO1994024803A1 (en) * | 1993-04-22 | 1994-10-27 | At & T Corp. | Multimedia telecommunications network and service |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2484747A1 (en) * | 1980-06-11 | 1981-12-18 | Faye Andre | METHOD AND DEVICE FOR ESTABLISHING BIDIRECTIONAL AND / OR MULTIDIRECTIONAL COMMUNICATIONS BETWEEN DIFFERENT PEOPLE GROUPED IN DIFFERENT GEOGRAPHICALLY REMOTE STATIONS AND CONNECTED TO THEM THROUGH TELEPHONE LINES |
JPS61158257A (en) * | 1984-12-29 | 1986-07-17 | Hashimoto Corp | Telephone operating system during reception of videotex |
US5305097A (en) * | 1989-12-20 | 1994-04-19 | Canon Kabushiki Kaisha | Communicating apparatus having a calling party number display device |
JP3292248B2 (en) * | 1991-05-29 | 2002-06-17 | 富士通株式会社 | Teleconferencing system |
EP0535601B1 (en) * | 1991-09-30 | 1997-09-10 | Siemens Aktiengesellschaft | Method for the establishment of conference connections in a processor controlled communication system |
US5373549A (en) * | 1992-12-23 | 1994-12-13 | At&T Corp. | Multi-level conference management and notification |
-
1994
- 1994-05-27 GB GB9802092A patent/GB2319138B/en not_active Expired - Lifetime
- 1994-05-27 GB GB9802084A patent/GB2319136B/en not_active Expired - Lifetime
- 1994-05-27 GB GB9802089A patent/GB2319137B/en not_active Expired - Lifetime
- 1994-05-27 GB GB9802081A patent/GB2319135B/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4686698A (en) * | 1985-04-08 | 1987-08-11 | Datapoint Corporation | Workstation for interfacing with a video conferencing network |
US4953159A (en) * | 1989-01-03 | 1990-08-28 | American Telephone And Telegraph Company | Audiographics conferencing arrangement |
WO1992021211A1 (en) * | 1991-05-21 | 1992-11-26 | Videotelecom Corp. | A multiple medium message recording system |
WO1994024803A1 (en) * | 1993-04-22 | 1994-10-27 | At & T Corp. | Multimedia telecommunications network and service |
Non-Patent Citations (1)
Title |
---|
IEICE Transactions, Vol .E74, no 9, September 1991, pages 2765-2770 * |
Also Published As
Publication number | Publication date |
---|---|
GB2319138A (en) | 1998-05-13 |
GB2319137B (en) | 1998-06-24 |
GB9802084D0 (en) | 1998-03-25 |
GB9802081D0 (en) | 1998-03-25 |
GB9802089D0 (en) | 1998-03-25 |
GB2319137A (en) | 1998-05-13 |
GB2319136A (en) | 1998-05-13 |
GB2319136B (en) | 1998-06-24 |
GB2319135B (en) | 1998-06-24 |
GB2319135A (en) | 1998-05-13 |
GB9802092D0 (en) | 1998-03-25 |
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Legal Events
Date | Code | Title | Description |
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732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
711B | Application made for correction of error (sect. 117/77) | ||
711G | Correction allowed (sect. 117/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20110217 AND 20110223 |
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732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20110224 AND 20110302 |
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PE20 | Patent expired after termination of 20 years |
Expiry date: 20140526 |