EP1620990A1 - Systeme de telecommunication permettant une diffusion de flux multimedia via un reseau de communication public - Google Patents
Systeme de telecommunication permettant une diffusion de flux multimedia via un reseau de communication publicInfo
- Publication number
- EP1620990A1 EP1620990A1 EP04714812A EP04714812A EP1620990A1 EP 1620990 A1 EP1620990 A1 EP 1620990A1 EP 04714812 A EP04714812 A EP 04714812A EP 04714812 A EP04714812 A EP 04714812A EP 1620990 A1 EP1620990 A1 EP 1620990A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- terminal
- data
- made available
- users
- active
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H04L12/1822—Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
-
- 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
- H04N7/15—Conference systems
- H04N7/152—Multipoint control units therefor
Definitions
- the present invention relates to a telecommunication system intended to allow several active users to exchange information materialized by at least one stimuli flow, which system including at least one conference bridge capable of processing said stimuli flow.
- Such telecommunication systems are commonly used to carry out teleconferences between multiple participants physically distant from each other.
- Stimulus flows can for example be constituted by sound flows and, optionally, by image flows.
- the conference bridge performs a summation of the different sound streams emitted by the different users, and sends each user a signal representative of the result of this summation, from which the sound stream emitted by the user considered.
- the conference bridge may also be able to select at any instant a flow of images sent by that of the users who is speaking at the instant considered, and to transmit the selected flow of images to the other users, thus carrying out an operation known to a person skilled in the art under the name "voice image switching".
- the conference bridge may be able to recompose an overall image on the basis of the image streams sent by all the active users in order to create an illusion of simultaneous presence in the same virtual location of all these users, thus achieving an operation known to those skilled in the art under the name "simulation of permanent presence”.
- bodily signals such as sounds or gestures
- these bodily signals emitted by an active user can be enriched by data signals, for example texts, graphics or any type of prerecorded audiovisual presentation, in order to facilitate understanding of the remarks made by this user.
- Conference bridges known in the prior art are not capable of processing such data signals by themselves, so that specific equipment must be provided for this purpose.
- a data server can be implemented for this purpose, which server will be able to collect data, via a communication network such as the Internet, from the computer equipment implemented by the different active users of the telecommunications system described more high.
- Such a server will be intended to store the data coming from the various active users and to make them accessible to said active users during the teleconference for which this data was generated.
- the data signals will generally be digital in nature since they will most often have been generated by computer equipment, of the personal computer or workstation type.
- the conference bridge carries out a processing of the flows of images and sounds according to its own formats and are not a priori compatible with standardized data transmission protocols, so that only users connected to each other through such a conference bridge will be able to access these streams.
- One of the aims of the invention is to enable a large number of passive users to broadcast all of the content of a conference in which different active users participate, which content will be materialized by a flow of stimuli constituted by for example by sound streams, data streams and optionally image streams.
- a telecommunication system in accordance with the introductory paragraph is characterized according to the invention in that it includes, in addition to the conference bridge:
- a data server connected to at least one terminal made available to at least one of said active users and capable of receiving data from said terminal, and. a compilation device able to collect said stimulus stream processed by the conference bridge, on the one hand, and synchronization information relating to data received by the data server, on the other hand, and to generate representative signals said stimuli and said synchronization information for the purpose of transmitting these signals to at least one other terminal distinct from the terminal or terminals made available to at least one of said active users.
- the invention allows a grouping of all information flows, and a transformation of said flows into signals compatible with current means of transmission, such as for example the Internet network. These signals can then be easily broadcast to a large number of passive users, without such a broadcast disturbing the operation of the conference bridge.
- At least one terminal made available to an active user is capable of generating control signals associated with data transmitted by said active user, the conference bridge being capable of conveying said control signals to at least one other terminal made available to another user.
- the conference bridge is capable of carrying control signals, for example via a specific channel, will allow remote control, by the active user who is developing a presentation, of terminals made available to the audience of said active user.
- control signals may constitute orders or signal specific events occurring in the course of the presentation.
- One or more communication channels will advantageously be arranged between one or more terminals separate from the terminal or terminals made available to at least one of said active users and one or more of said terminals made available to active users.
- Such a communication channel will allow one or more passive users of the telecommunications system to transmit messages containing questions or observations to the active users. Passive users will thus be able to react to one or more presentations, of which they will initially have been only spectators, in order to obtain clarifications on certain passages of said presentations, or even in order to make comments which will only enrich the content of future presentations. Such an arrangement of the system described above will thus make it possible to confer a share of relative interactivity to the presentations transmitted to passive users, who do not have the possibility of intervening in real time in the course of said presentations.
- Such communication channels also make it possible, between other complementary applications, opinion consultations by means of online voting.
- a telecommunication system as described above will also include storage means intended to store information conveyed by signals generated by the compilation device.
- Such a variant of the invention will allow a deferred transmission of a teleconference to passive users, but also to active users who have participated in said teleconference and may wish to relive it as a whole, and not from the point of view alone. actor who will have been theirs during the course of the conference which was recorded.
- FIG. .l is a functional diagram which represents a telecommunication system conforming to a particular mode of implementation of the invention
- Fig.2 is a block diagram which represents formatting means implemented in a compilation device included in such a telecommunication system
- Fig.3 is a block diagram which represents means of dissemination used in such a telecommunication system.
- Fig.l shows a SYST telecommunication system in which the invention is implemented.
- Each active user AUi is here provided with a terminal including a display device DISPi, which is provided with at least one camera CM and at least one microphone MC respectively intended to generate the streams of images and sounds IFi and SFi intended for other users of the SYST system.
- the DISPi display device consists of a screen intended to display image streams intended for the active user AUi, and at least one loudspeaker LS intended to reproduce sound streams intended for said active user AUi.
- This SYST system includes a CNFB conference bridge capable of processing said streams of images and sounds IFi and SFi (for i-1 to 4).
- the first active user AUI will receive from the conference bridge a sound stream SF234 constituted by the resulting sound stream SFI 234 from which the SFI sound stream emitted by the first active user AUI will have been subtracted.
- the CNFB conference bridge may be able to select at each instant the flow of images emitted by that of the active users speaking at the instant considered, and transmitting the selected image stream to the other active users, thus carrying out an operation known to a person skilled in the art under the name "switching from images to voice".
- active AUi considered.
- the second active user AU2 will receive from the conference bridge a stream of images LF134 consisting of the resulting image stream IF1234 from which the LF2 image stream sent by the second active user AUI will have been subtracted.
- Each terminal made available to an active user AUi includes in the example described here a personal computer PCi which will allow this active user to send data signals, for example texts, graphics or other signals to the other users of the system. Any type of pre-recorded audiovisual presentation, in order to facilitate understanding of the comments made by this active user.
- Local management of the data flows originating from or intended for each active user AUi is carried out by means of a specific software application APi installed on the personal computer PCi of said active user AUi.
- the image and sound streams coming from or intended for each user AUi also pass through his personal computer PCi, which makes it possible to gather in a single device all the equipment locally necessary for each active user to intervene in a teleconference carried out by means of a SYST telecommunication system in accordance with the present invention.
- Such a gathering of means is however purely optional and has no direct impact on the invention itself.
- the CNFB conference bridge is not capable of processing data flows by itself, so that specific equipment is provided for this purpose.
- a DTSV data server is implemented for this purpose, which DTSV data server will be able to collect such data flows, via a communication network such as the Internet, from the personal computers PCi with which the various active users are provided.
- only the first user AUI transmits data Dl which will be stored in the data server DTSV and retransmitted by said server DTSV to the other active users AU2, AU3 and AU4 during development by the first active user UAI of the presentation in view from which this data was generated.
- the first active user AUI could for example be a teacher giving a course to three different classes which each constitute one of the second, third and fourth active users AU2, AU3 and AU4.
- the CNFB conference bridge performs a processing of image and sound streams according to its own formats and are not a priori compatible with standardized data transmission protocols, for example the Internet protocol, so that, in the current state of the art, only users who are directly connected to the CNFB conference bridge can have access to the information flows which cross it.
- the SYST system includes a CMPD compilation device able to collect streams of images and sounds processed by the conference bridge, on the one hand, and synchronization information relating to data received by the DTSV data server, on the other hand.
- the IFi and SFi image and sound streams can be collected individually, or, as is the case here, in the form of the resulting LF1234 and SF1234 streams generated by the CNFB conference bridge.
- the Dl data collected from the DTSV data server is already under a form compatible with a transmission protocol dedicated to a public network, said data will not in principle have to undergo a specific decoding.
- the DECIS decoding means separate the resulting sound and image streams SF1234 and IF1234 into three separate streams SF, LF and SC, as well as the synchronization information SC.
- the FISD formatting means then generate SCMF media streams, which have been converted into a format compatible with a transmission protocol dedicated to a public network, for example into a Windowsmedia or Realnetworks format dedicated to broadcasting via the Internet ( any of the above signs which may be protected).
- SCMF media streams are intended to include F1234 image and sound (SI) streams generated by all active users, which image and sound streams are synchronized using SYNC synchronization information from the control signal.
- SI image and sound
- the terminal made available to the first active user AUI is able to generate control signals SCI associated with the data D1 transmitted by said first active user AUI.
- the CNFB conference bridge is able to convey these SCI control signals to the terminals made available to other active users AU2, AU3 and AU4, on the one hand, but also to the terminals made available to passive users PU1. PU2 ... PUR
- Such dissemination of the SCI control signals will allow remote control, by the active user who is developing a talk, of terminals made available to the audience of said active user.
- the terminals PU1, PU2 ... PUN may for example, on an order transmitted by the control signals SCI and materialized by the synchronization information SYNC, request from the data server DTSV and by means of requests Drq a supply of Dl data at relevant times defined by said SCI control signals.
- the SCI control signals may, in other embodiments of the invention, be broadcast by other channels and may in particular not pass through the CNFB conference bridge, being for example conveyed together with the data signals Dl.
- the control signals SCi will be automatically generated by the applications APi intended to generate and transmit the data Di with which said control signals SCi are associated.
- Command signals may constitute orders or signal specific events occurring in the course of the presentation.
- the command signal may include a remote command to start or stop a given application, such as an Internet browser, a calculator, word processing or graphics presentation software, etc.
- the command signal may also include a remote command for moving a window associated with an application to specific coordinates of a screen of the terminal for which such an order is intended, as well as a width and / or a height of such a window.
- the command signal may also include an activation command on the screen of an application which has previously been placed in a menu of the "taskbar” type.
- the command signal may also order an execution of a function of an object of the "menu” type or of an object of the "button” type of any application previously installed on the terminal for which such an order is intended.
- the control signal can signal a request for synchronization of any web page.
- the control signal may also signal a request for synchronization of display of a graph extracted from the data server, which request will have been materialized by an active user at the origin of said graph by an action on a key of a keyboard. or by clicking on a mouse.
- the control signal may also signal a request for synchronization of an animation of such a graph, which request may also have been materialized by an action on a key on a keyboard or by a click on a mouse.
- system SYST described in this exemplary embodiment of the invention includes a CCPA communication channel between the terminals made available to passive users PU1, PU2 ... PUN and the terminals made available to active users, only the communication channel intended for the first active user AUI being represented here in order to limit the complexity of the present figure.
- Such a CCPA communication channel will allow one or more passive users PU1, PU2 ... PUN to transmit PUQ messages containing questions or comments to the active users. Passive users PU1, PU2 ... PUN will thus be able to react in real time or delayed to one or more presentations of which they will have been, initially, only spectators, in order to obtain clarifications on certain passages of said presentations, or again in order to make comments that can only enrich the content of future presentations.
- the CCPA communication channel also makes online voting possible, among other complementary applications.
- Fig.2 schematically illustrates how FISD shaping means included in the compilation device previously described can be achieved. These FISD formatting means are intended to receive sound and image streams SF and LF as well as control signals SC previously decoded.
- An A / VENC audio / video encoding module is intended to encode said sound and image streams in a format compatible with a protocol for transmission via the Internet, for example in Windowsmedia or Realnetworks format.
- the content of the control signals SC is integrated into the sound and image streams thus encoded by a synchronization module SCHR, intended to deliver in real time SCMF streams to the broadcasting means, on the one hand, but also to means of memorization which will allow a diffusion of these flows in deferred mode.
- Fig.3 schematically illustrates how BRDSV broadcasting means can be produced.
- BRDSV broadcasting means include referral means MX, for example a multiplexer, intended to receive either SCMF streams produced in real time by the compilation device, or MF streams previously memorized for their deferred broadcasting.
- the BRDSV broadcasting means also include an MI interface module comprising, on the one hand, a passive user detector PUDET and, on the other hand, a stream transmitter PUBRD.
- the passive user detector PUDET will emit a control signal Cnt having in this example a binary value "0" or "1" which will indicate to the referral means MX whether it must select SCMF streams produced in real time or streams MF previously stored for transmission to the PUBRD stream transmitter, which will restore PUjFx streams specifically adapted to the technical characteristics defined by the passive user PUj in its request PUjRq.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0302666A FR2851863A1 (fr) | 2003-02-28 | 2003-02-28 | Systeme de telecommunication permettant une diffusion de flux multimedia via un reseau de communication public |
PCT/FR2004/000436 WO2004080029A1 (fr) | 2003-02-28 | 2004-02-26 | Systeme de telecommunication permettant une diffusion de flux multimedia via un reseau de communication public |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1620990A1 true EP1620990A1 (fr) | 2006-02-01 |
Family
ID=32843098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04714812A Withdrawn EP1620990A1 (fr) | 2003-02-28 | 2004-02-26 | Systeme de telecommunication permettant une diffusion de flux multimedia via un reseau de communication public |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060230101A1 (fr) |
EP (1) | EP1620990A1 (fr) |
FR (1) | FR2851863A1 (fr) |
WO (1) | WO2004080029A1 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5657096A (en) * | 1995-05-03 | 1997-08-12 | Lukacs; Michael Edward | Real time video conferencing system and method with multilayer keying of multiple video images |
US20030038805A1 (en) * | 2001-08-22 | 2003-02-27 | Wong Curtis G. | System and method to provide a spectator experience for networked gaming |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7185054B1 (en) * | 1993-10-01 | 2007-02-27 | Collaboration Properties, Inc. | Participant display and selection in video conference calls |
US5434913A (en) * | 1993-11-24 | 1995-07-18 | Intel Corporation | Audio subsystem for computer-based conferencing system |
US6002768A (en) * | 1996-05-07 | 1999-12-14 | International Computer Science Institute | Distributed registration and key distribution system and method |
US5916302A (en) * | 1996-12-06 | 1999-06-29 | International Business Machines Corporation | Multimedia conferencing using parallel networks |
US6704769B1 (en) * | 2000-04-24 | 2004-03-09 | Polycom, Inc. | Media role management in a video conferencing network |
US6987728B2 (en) * | 2001-01-23 | 2006-01-17 | Sharp Laboratories Of America, Inc. | Bandwidth allocation system |
US7107312B2 (en) * | 2001-02-06 | 2006-09-12 | Lucent Technologies Inc. | Apparatus and method for use in a data/conference call system for automatically collecting participant information and providing all participants with that information for use in collaboration services |
US7266091B2 (en) * | 2001-02-28 | 2007-09-04 | The Trustees Of Columbia University In City Of New York | System and method for conferencing in inter/intranet telephony |
US7404001B2 (en) * | 2002-03-27 | 2008-07-22 | Ericsson Ab | Videophone and method for a video call |
US7305436B2 (en) * | 2002-05-17 | 2007-12-04 | Sap Aktiengesellschaft | User collaboration through discussion forums |
US7124163B2 (en) * | 2002-05-24 | 2006-10-17 | Convedia Corporation | Data server |
US7370194B2 (en) * | 2002-06-10 | 2008-05-06 | Microsoft Corporation | Security gateway for online console-based gaming |
-
2003
- 2003-02-28 FR FR0302666A patent/FR2851863A1/fr active Pending
-
2004
- 2004-02-26 EP EP04714812A patent/EP1620990A1/fr not_active Withdrawn
- 2004-02-26 US US10/546,274 patent/US20060230101A1/en not_active Abandoned
- 2004-02-26 WO PCT/FR2004/000436 patent/WO2004080029A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5657096A (en) * | 1995-05-03 | 1997-08-12 | Lukacs; Michael Edward | Real time video conferencing system and method with multilayer keying of multiple video images |
US20030038805A1 (en) * | 2001-08-22 | 2003-02-27 | Wong Curtis G. | System and method to provide a spectator experience for networked gaming |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004080029A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20060230101A1 (en) | 2006-10-12 |
FR2851863A1 (fr) | 2004-09-03 |
WO2004080029A1 (fr) | 2004-09-16 |
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Inventor name: ROUQUIE, CHRISTOPHE Inventor name: MARQUE, JEAN-LOUIS Inventor name: JEZEQUEL, DOMINIQUE Inventor name: LE HUEROU, EMMANUEL |
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