• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method and apparatus for audio- and video-based communication between at least one master subscriber (3) and a plurality of group participants (41..n), wherein a server computer (1) changes in a corresponding request between a first and a second operating mode in which, in the first operating mode, the streaming server (2) is supplied with the contents recorded by a master communication unit (3), the streaming server (2) sends the contents supplied to it in real time via at least one channel (61..n) the data connection to the group participants (41..n) streams, so that only a unidirectional communication takes place, - in the second mode of operation of the master user (3) a return channel from a requesting or selected group participant (41..n) to the server computer ( 1), so that the contents of the subscriber communication unit located at the requesting or selected group subscriber (41..n) are recorded as video and video content Audio data via at least one channel (61..n) are streamed to the server computer (1) in real time and fed to the streaming server (2) and the streaming server (2) the audio and video data supplied to it in real time via at least a channel (61..n) of the data connection to the remaining group participants (41..n) and the master participant (3) streams, or the audio or video streams of the requesting or selected group participant (41..n) with those of the master subscriber (3) mixes additively and streams this total stream to all group subscribers (41..n).
    公开号:AT511151A1
    申请号:T3122011
    申请日:2011-03-08
    公开日:2012-09-15
    发明作者:
    申请人:Visocon Gmbh；
    IPC主号:
    专利说明:

    * «* ··· *« ·· »• * · · *« ·· «t · • · I · t · ·«
    ··· »« «» * »« «« V 1
    The invention relates to a method, a server computer and a device for audio and video-based real-time communication between at least one master subscriber and a plurality of group subscribers.
    For example, audio and video-based real-time communication is required as part of video conferencing between remote participants. Furthermore, audio- and video-based real-time communication is also used in so-called e-learning applications and web seminars, where the presentation of a previous speaker over a computer network, e.g. the Internet is transmitted to a large number of subscribers. Various technical methods are currently used to deliver audio and video content over computer networks. While classical broadcasting offerings (radio, radio, etc.) reach as wide a range as possible, streaming media offers become more expensive as the number of subscribers increases, because the data must be sent to each recipient individually. Although in the network technology, the multicast mode is known in which a streaming stream from the server streaming can be sent simultaneously to different recipients with low network load; However, this is practically not used until today, because many routers on the Internet do not support it. Instead, streaming is realized for each user separately at his request as a point-to-point connection between the sender's media server and the user's computer. Since streaming is advantageous in particular in the real-time transmission and this transmission is not always designed for permanent storage as well, the quality can often be rather low in order to ensure a smooth transmission at the data transmission rates usual today , The disadvantage of streaming is that only a unidirectional communication takes place, namely from the streaming server to the receiver.
    Unidirectional streaming is not suitable for videoconferencing and other applications where bidirectional communication is required. Bidirectional communication is also required, for example, in e-learning applications if students are to be allowed to ask questions during the lecture. For bidirectional communication between more than two users, conventional solutions usually require at least one multipoint control unit (MCU). These are hardware and / or software solutions that manage and control one or more multipoint conferences. The MCU is connected to all participants and manages and regulates the incoming and outgoing video and audio data streams. However, the management of the incoming and outgoing video and audio data streams is very complex and computationally intensive, so that the number of participants in such systems is limited. To facilitate the management of video conferencing, one of the participants may be assigned the role of a moderator (master participant).
    The present invention therefore seeks to provide a system for audio and video based real-time communication between at least one master subscriber and a plurality of group subscribers in which the number of subscribers is nearly unlimited, while at the same time offering the possibility of bidirectional communication should be. · * ·· »* * * ··» *
    * * »I ι ·· * · 4» ·· »* i a > * * * * * * * * * * · * * * * * *
    To achieve this object, the present invention according to a first aspect provides a method in which a data connection is established between a master communication unit arranged at the master subscriber and a server computer via which the contents recorded by the master communication unit are transmitted via at least a channel is streamed in real time as video and audio data to the server computer, a streaming server is operated on the server computer, a data connection is established in each case between the subscriber communication units arranged at the group participants and the server computer, wherein the Server computer changes in a corresponding request between a first and a second operating mode, wherein in the first mode of operation of the streaming server, the contents recorded by the master communication unit are supplied, the streaming server, the content supplied to him in real time via at least one channel There In the second operating mode, the master subscriber releases a return channel from a requesting or selected group subscriber to the server computer, so that the contents recorded by the subscriber communication unit located at the requesting or selected group subscriber are Video and audio data are streamed to the server computer in real time via at least one channel and supplied to the streaming server, and the streaming server sends the audio and video data supplied to it in real time over at least one channel of the data. «* * Ti * ·· i · t ·« ··· # Participant streams.
    As a result, which can be changed between the first and the second mode of operation, it is possible for the master subscriber to give the floor to a single group subscriber, who is then streamed in his place to all other group participants. In the first operating mode, only the master participant is streamed to all group participants. After the master participant has given the word to a group participant, in the second mode of operation the group participant is streamed to all other group participants and to the master participant. Each time a unidirectional 1: N streaming connection is realized, so that a large number of participants can be achieved. Due to the possibility to give the floor to any group member, a bidirectional communication is possible overall but without much computational and equipment expense. In the second operating mode, the master participant can withdraw the word from the group participant and thus return to the first operating mode. This type of control is particularly beneficial for lecture events in the context of e-learning or web seminars.
    Unlike conventional conference systems, the respective stream does not have to be elaborately processed by the server computer within the scope of the invention. Rather, it is sufficient if the stream received from the server computer is streamed by the streaming server unchanged to the receivers. As a result, the computational effort can be significantly reduced. • * 4 · · · · · · · · · · · · · · «· ·« · · · · · · · · · · · · · · · · · · ··· · # * p * 5 While the group participant taking over the word is streamed to all other participants, the accepting group participant itself does not have to receive a stream. However, the communication can preferably be made more pleasant if the acquiring group participants, the image and possibly the sound of the master participant is streamed, so that the group participants can observe the corresponding response of the master participant. The invention is further developed for this purpose in such a way that the streaming server in the second operating mode additionally receives the contents recorded by the master communication unit in real time and the streaming server supplies the contents supplied by the master coding unit in real time via at least one further channel streams to the requesting or selected group participants.
    Alternatively, however, the group participant taking over the word and also all the other group participants additionally receive the image and possibly the sound of the master participant. In this case, processing of the streams by the server is required to allow both streams, i. the stream of the master subscriber and the stream of the group participant taking over the word are combined into a single stream, wherein the video image received at the receivers is divided and, for example, in the right half of the image the image of the master user and in the left half the image of the master contains the word accepting group member. For this purpose, the invention is preferably further developed in such a way that in the second operating mode the audio and video data transmitted by the requesting or selected group subscriber to the server computer are decoded in the server computer that additionally receives video and audio data recorded by the master communication unit - · «··« * · »f« i ·· * · ** ·· »* ·· • * ·« l II · »· • * < * * tt * i f * * * 4 * «* I · · •» | | t should be streamed to the server computer and decoded there, that a composite stream is generated from the two decoded streams in the server computer in real time, and that the composite stream is encoded and sent to the participant's computer. Communication units is streamed.
    It should be noted that the term " communication unit " includes any combination of image and sound recording and playback units. In particular, it is conceivable that the image and sound recording unit and the image and sound reproduction unit may be formed as separate structural units, e.g. as a video camera and as a display device with speakers. Furthermore, it is conceivable that said units may be incorporated in a computer unit, e.g. a workstation PC, integrated or formed as separate units, e.g. as an external video camera. If the image and sound recording or reproducing unit is designed as an external device, the connection with the server computer via at least one suitable for establishing a data connection with the server computer intermediate unit, such as. a computer unit, an interface unit or the like.
    When in the context of the invention it is said that data is transmitted via a "channel", this is not to be understood as the physical transmission means, but instead refers to a data stream structure resulting from the use of the respective transmission or streaming protocol, which is supplied by the receiver of Receive other channels separately and the corresponding content can be displayed separately in the sequence. Thus, it is merely the logical division of the total data to be transmitted into individual channels meant. It is essential that the content streamed via a first channel can be displayed on a display device separate from the content streamed via a second channel, e.g. in different windows of a graphical user interface of a computer. In such multi-channel transmission, each stream can be dynamically adjusted according to the respective requirements before and during transmission, e.g. in terms of image resolution, refresh rate and the like, in order to make the best use of the available bandwidth. In particular, the image repetition rate and / or the image size (number of pixels) of the video stream transmitted via the one channel can be selected differently from the corresponding values of the video stream transmitted via the other channel.
    A preferred embodiment of the invention provides in this context that in the master communication unit and possibly the subscriber communication units two video cameras are used, their contents transmitted via separate channels to the server computer and the streaming server via separate channels be starred. Thus, the image of the presenter, i. the master participant or a group participant, are recorded and streamed, usually only the face of the corresponding person is detected. The other camera may serve to record and stream a presentation medium supporting the presentation, in particular a visual aid. The presentation medium can be a blackboard, a white board, a document, a handwriting on a paper, or a demo room. If the presentation medium is an electronic medium, e.g. a slide show, an electronic slide show, electronic • * *
    tos or the like. The corresponding content can be streamed directly from the respective computer without a camera would be necessary. Optimal adaptation of the streams generated from the two cameras or videos may be made in terms of maximum bandwidth utilization such that the refresh rate of the stream presenting the presenter is selected higher to obtain a fluid image while the refresh rate of the stream presenting the presentation medium is chosen to be lower, since a liquid image sequence is of less importance here, and yet the more a higher resolution is advantageous for the transmission of documents. By reducing the image repetition rate, the available bandwidth can be utilized optimally. Likewise, a different resolution or image size can be selected for the individual streams. For example, in order to reduce the required transmission bandwidth, the image size of the stream showing the presenter may be made smaller than the image size of the stream showing the presentation medium.
    As " sureaming server " In the context of the invention, a server is designated for the delivery of streaming media data via a network. Typical streaming servers support special streaming protocols such as RTI and RTCP. The term " server " This refers primarily to a software in the context of a client-server model, which runs on the server computer and provides the necessary services for streaming. For streaming the video and possibly audio data are usually encoded, whereby common video codecs are available, such. VP8, H264, as well as signaling protocols such as e.g. SIP.
    9
    As already mentioned, the changeover from the first operating mode to the second operating mode within the scope of the invention preferably takes place at the request of a group subscriber to the master subscriber. The request process can preferably take place in such a way that the request of a group subscriber to the master subscriber includes the sending of a request message from the requesting group subscriber via the server computer to the master user that the request to the master communication unit corresponds to the master user. Subscriber is signaled and that when activating a preview mode by the master subscriber transmitted by the requesting subscriber communication unit video content and possibly audio content in real time to the server computer and transmitted from the streaming server in real time exclusively to the master communication unit will be streamed. In this way, the master participant in preview mode can get a stream from the requesting group participant on the screen and possibly exchange messages before he gives him the word by changing to the second operating mode.
    A " request message " does not necessarily mean a text message, but rather comprises any bit string recognizable by the master communication unit as a request, which causes a signaling of a request to the master user. The signaling may e.g. be done by displaying a thumbnail image of the requesting group member on a display device of the master communication unit or that generates a flashing signal and the name of the requesting group member is displayed.
    »
    The switching from the first to the second operating mode can alternatively also be carried out by the master subscriber without a group subscriber requesting this.
    During a lecture as well as during a video conference, it is pleasant for the presenter to be able to observe the reaction and the behavior of the listener in order to be able to adapt the own lecture if necessary. According to a preferred embodiment of the invention, the procedure for this purpose is such that the server computer in the first operating mode additionally assembles a plurality of video contents or photos recorded and transmitted by the subscriber communication units into a mosaic image and the streaming server assembles the mosaic image the master communication unit is streaming so that the mosaic image is displayed on the display device of the master communication unit. The mosaic image can be composed in such a way that the images of the individual group participants pass through the mosaic image sequentially, which is particularly advantageous if the number of group participants exceeds the number of images that can be displayed in the mosaic image.
    A further preferred embodiment of the invention provides that the establishment of a data connection between a subscriber communication unit and the server computer comprises the transmission of a user ID of the group subscriber to the server computer and the authentication of the group subscriber.
    Furthermore, it is preferably provided that the reception of the stream transmitted by the streaming server is interrupted by subscriber communication units which establish a direct streaming connection between them. · · · · · · · · · · · · · · · · · · · · · · F f f f f f f f f f f f f f f f f f f f f f f · Ψ * 11
    Basically, it should be noted that the term " master participant " in the context of the invention does not necessarily designate a specific person. Rather, only the function of a participant as " master " or moderator addressed. The " Master " function may be handed over from one participant to another participant, so that this other participant will receive the rights reserved to the master participant, e.g. the right to give the floor to a group member and withdraw it.
    In order to achieve the object on which the invention is based, the present invention according to a second aspect provides a device comprising a server computer with a streaming server, the server computer having at least one interface for receiving and / or transmitting a stream from or to a master communication unit and at least one interface for receiving and / or transmitting a stream to / from a plurality of subscriber communication units, the server computer having processing means for switching between a first and a second mode of operation upon a corresponding request in which, in the first operating mode, the streaming server streams the audio and video data supplied to it from the master communication unit in real time via at least one channel to the group participants so that only unidirectional communication takes place; in the second operating mode, the master subscriber provides a return channel of a requesting or selected group participants to the server computer, so that the arranged by the requesting or selected group participants subscriber communication unit ··· «Μ« · Μ Μ «·« «« * · · * »« * * * * ft · « | < · λ · ι »· ft > If there are 12 recorded and transmitted to the server computer via at least one channel as audio and video data in real time content supplied to the streaming server and the streaming server streams the audio and video data supplied to it in real time via at least one channel to the remaining group participants and the master user.
    Preferred developments of the server computer result from the subclaims.
    The invention will be explained in more detail with reference to exemplary in the drawing dargesteliten embodiments. 1 shows the scheme of a real-time communication in a first operating mode of the server computer, FIG. 2 shows a modified memory scheme, FIG. 3 shows a communication scheme in a preview mode of the server computer, FIG. 4 shows a communication scheme in the second operating mode of the server 6 shows an alternative communication scheme in the second operating mode, FIG. 7 shows a modified communication scheme in the first operating mode of the server computer, and FIG. 8 shows a further alternative communication scheme in the first Operating mode of the server computer.
    In Fig.l a server computer is designated 1, on which a virtual conference room 2 is set up with a streaming server. The server computer 1 is connected via conventional data connections to a master communication unit 3 and a plurality of subscriber communication units 4χ, 42, 43 to 4n. The communication units 3 or 4i..n are, for example, conventional workstations
    • »* # * * * I 9 # 9 9 * * 9 9 9 * 9 9 9 + 9 9 9 99 9 9 9 9 99 * 13 PCs, smartphones with internet connection or TV Set top boxes (embedded systems) equipped with a video and audio capture and playback unit. In the first mode of operation (master streaming mode) shown in FIG.
    Communication unit 3 recorded video and audio contents supplied to the streaming server 2, which streams the data stream over a plurality of point-to-point connections to the subscriber communication units 4i..n. In this way, the subscriber communication units 4i..n receive the video and possibly audio contents recorded by the master communication unit 3 in real time. Thus, a plurality of group participants each having a subscriber communication unit 4j..n can follow the presentation of a master subscriber to whom the master communication unit 3 is assigned. As indicated by the arrows along the transmission channels 5 and 6i..n, the streaming of the video and audio data takes place only in one direction, so that in the first operating mode of the server computer 1 shown in Fig.l 1 queries by the group participants during the lecture of the master participant are not possible.
    As shown in FIG. 2, in the first operating mode it can additionally be provided that a miniature image of the group subscriber is received by the subscriber communication units 4i..n and, as indicated by 7x..n, to an addition circuit 8 of the server computer 1 are transmitted, where the individual thumbnail images are assembled into a mosaic image 9, which is transmitted from the streaming server 2 to the master communication unit 3 and displayed there. It can be seen that the transmission of the thumbnails in each case takes place over one of the 14 • «* * *
    Streaming channel 6i..n separate channel 7i..n and that the transmission of the mosaic image 9 to the master communication unit 3 via a channel 5 separate channel 10 takes place. The thumbnails can be taken at regular intervals by the subscriber communication units 4i..n, so that the mosaic image 9 is renewed regularly ("refresh"). The refresh rate may be selected according to the available transmission bandwidth., E.g. is a renewal rate of once per second conceivable.
    FIG. 3 shows how a query can be initiated by a group participant to the master participant during the lecture. The requesting group participant in this case sends a request to the server computer 1, as indicated by the dashed line 11. The request is forwarded to the master communication unit 3 and signaled there to the master subscriber. If the master user accepts the request, a preview mode is now activated, in which the content recorded by the subscriber communication unit 3 is streamed via the channel 12 to the server computer 1 and from there via the channel 13 to the master communication unit 3 become. In this way, the master participant can get a stream from the requesting group participant and contact the latter without the other group participants being aware of it. A bidirectional communication can thereby be recorded with the requesting group subscriber before the word is given to the requesting group subscriber by changing to the second operating mode.
    4, the addressed second operating mode is explained, wherein it is apparent that now the requesting * * * * * # * *
    »· • 9 • * η 4 15
    Group participants (subscriber communication unit 43) transmitted on-geno content to the server computer 1 and from this one hand to the master communication unit 3 and on the other hand to all other participants
    Communication units 4i, 42, 4n are streamed. In this way, the group participant (subscriber communication unit 43) assumes the role of the presenter. At the same time, the contents recorded by the master communication unit 3 are streamed via the separate channels 5 and 63 to the subscriber communication unit 43.
    Instead of giving the floor to the requesting group participant, the master participant can assign the role of a submaster to the requesting group participant. This is shown in Fig.5. It can be seen that a second conference room 16 has been created on the server computer 1, in which the original group subscriber has taken over the role of the master subscriber with the subscriber communication unit 43, whereby the subscriber communication unit 43 has become the master communication unit 17 is. The new conference room 16 has been assigned a plurality of group subscribers 44, 4s and 4ß by the original master subscriber. In the context of the new conference room 16, the new submaster 17 has the same powers as the master subscriber 3 with respect to the conference room 2, and thus can give and disallow individual group participants.
    FIG. 6 shows an alternative to the procedure according to FIG. The stream transmitted by the group communication unit 43 is now supplied to a decoding circuit 18. In the same way, the name of the master message is the same as that used by the master. * * * * * · · · · * * "" * * 9 "9 **« * »· t * ·· * · · · ··· **« * «·« · 16
    Communication unit 3 emitted stream of a decoding circuit 19 supplied. The decoded streams are fed to an adder 20, which assembles the two decoded streams into a new stream. The new stream is subsequently encoded in the encoding circuit 21 and transmitted in sequence to the subscriber communication units 41 .. n, so that the group participants can see and hear not only the group participant taking over the word but also the master participant.
    In the illustration according to FIG. 7, the first operating mode is shown and it can be seen that the stream is interrupted via the channels 62 and 6n when a one-to-one call is being streamed between the subscriber communication units 42 and 4n via a direct channel 22. The direct channel 22 for a one-to-one call can also be routed via a streaming server for connection-related reasons.
    Finally, FIG. 8 shows a modified embodiment of the first operating mode, in which the streaming server 2 can provide streams of the same content for different bandwidths. Thus, it can be seen that in the example illustrated in FIG. 8 the subscriber communication units 4i and 4n are supplied with a first bandwidth stream and the subscriber communication units 42 and 43 are provided with a second bandwidth stream.
    权利要求:
    Claims (19)
    [1]
    17 * · * »··» · /

    1. A method for audio and video-based real-time communication between at least one master subscriber and a plurality of group participants, wherein between a arranged at the master subscriber master communication unit and a server computer, a data connection is established over which the of the Master communication unit recorded contents are streamed via at least one channel as video and audio data to the server computer in real time, the server computer a streaming server is operated between the participants arranged at the group participants subscriber communication units and the server computer respectively a data connection is established, wherein the server computer changes in a corresponding request between a first and a second operating mode, wherein in the first mode of operation the streaming server, the contents received from the master communication unit are supplied, the streaming server zugs him In the second mode of operation, the master subscriber releases a return channel from a requesting or selected group subscriber to the server computer, so that the message from the requesting or forwarding user is forwarded in real time via at least one channel of the data connection to the group participants Selected group participants arranged participant communication unit recorded content as video and audio data via at least one channel to the server computer in real time streamed and fed to the streaming server and * *

    the streaming server streams the audio and video data supplied to it in real time via at least one channel of the data connection to the remaining group subscribers and the master subscriber.
    [2]
    2. The method according to claim 1, characterized in that the streaming server in the second operating mode, in addition, the contents recorded by the master communication unit are supplied in real time and the streaming server supplied by the master communication unit content in real time via at least one other Channel streams to the requesting or selected group participants.
    [3]
    3. The method according to claim 1, characterized in that in the second operating mode, the transmitted from the requesting or selected group participants to the server computer audio and video data are decoded in the server computer that additionally recorded by the master communication unit video and audio content be streamed to the server computer and decoded there that from the two decoded streams in the server computer in real time a composite stream is generated and that the composite stream is encoded and streamed to the subscriber communication units.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the switching from the first operating mode in the second operating mode on request of a group member to the master subscriber takes place.
    [5]
    5. The method according to claim 4, characterized in that the request of a group member to the master subscriber sending a request message from the beginning 19 * · «· 4« ··· ····· > · · * · »T *» »« * · * · * ·· Φ «| * * * * * ** ··· * * · «· + 4« · i * ing group subscribers via the server computer to the master subscriber comprises that the request to the master communication unit signals the master subscriber and that when the master user activates a preview mode, the video content and possibly audio content recorded by the requesting subscriber communication unit is transmitted in real time to the server computer and in real time by the streaming server exclusively to the master Communication unit to be streamed.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the server computer in the first operating mode in addition a plurality of recorded and transmitted by the subscriber communication units video content or photos to a mosaic image and the streaming server the mosaic image to the master communication unit so that the mosaic image is displayed on the display device of the master communication.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that in the master communication unit and possibly the subscriber communication units, two video cameras are used, the contents of which are transmitted to each other via separate channels to the server computer and the streaming server via separate channels are streamed.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that the establishment of a data connection between a subscriber communication unit and the server computer, the transmission of a user ID of the group t • • • • * · ··· '·· • ············································································································································································································································
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that the reception of the streams emitted by the streaming server is interrupted by subscriber communication units which establish a direct streaming connection between them.
    [10]
    10. Server computer, in particular for carrying out the method according to one of claims 1 to 9, with a streaming server, wherein the server computer at least one interface for receiving and / or sending a stream from or to a master communication unit and at least an interface for receiving and / or transmitting a stream to / from a plurality of subscriber communication units, wherein the server computer has processing means to switch in a corresponding request between a first and a second operating mode, wherein in the first mode of operation Streaming server the audio and video data supplied to him from the master communication unit in real time via at least one channel to the group participants, so that only an unidirectional communication takes place, in the second mode of operation of the master participants a return channel from a requesting or selected group participants to the server computer releases so that the content received by the subscriber communication unit located at the requesting or selected group subscriber and transmitted to the server computer in real-time via at least one channel as audio and video data is fed to the streaming server, and

    * · · • • φ φ φ φ der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der der Streams real time via at least one channel to the other group participants and the master participants.
    [11]
    11. Server computer according to claim 10, characterized in that the processing means are designed such that the streaming server in the second operating mode in addition to him the master communication unit supplied audio and video data in real time via at least one further channel to the requesting or selected group participants.
    [12]
    12. Server computer according to claim 10, characterized in that the processing means are designed such that in the second operating mode, the transmitted from the requesting or selected group participants to the server computer audio and video data are decoded in the server computer by means of a decoding circuit, that additionally recorded by the master communication unit and transmitted to the server computer video and Auaioinhalte be there decoded by means of a decoder, that from the two decoded streams in the server computer in real time by means of an addition circuit, a composite stream is generated and that the composite Stream is encoded by means of a coding circuit and streamed to the subscriber communication units.
    [13]
    13. Server computer according to one of claims 10 to 12, characterized in that the processing means are designed such that the switching from the first operating mode to the second operating mode upon request of a Gruppenpart-

    to the master participant or by allocation by the master participant.
    [14]
    14. Server computer according to claim 13, characterized in that the processing means are designed such that the request of a group member to the master subscriber comprises sending a request received from the requesting group subscriber request message to the master subscriber and that in Aktiveren a Preview mode by the master participant, the video content recorded by the requesting user communication unit and transmitted in real time to the server computer and possibly audio content streamed from the streaming server in real time exclusively to the master Koramunikationseinheit.
    [15]
    15. Server computer according to one of claims 10 to 14, characterized in that the processing means are designed such that the server computer in the first operating mode in addition to a plurality of recorded and transmitted by the subscriber communication units video content by means of an addition circuit to a mosaic image and the mosaic image streams to the master communication unit.
    [16]
    16. Server computer according to one of claims 10 to 15, characterized in that the processing means are designed such that recorded by the master communication unit and possibly the subscriber communication units by means of two video cameras and via separate channels to the server computer streamed content is streamed from the streaming server through separate channels. 23 4 Λ 4 4 4 • * · »· * • # 4 ·


    [17]
    17. Server computer according to one of claims 10 to 16, characterized in that the processing means are designed such that the establishment of a data connection between a subscriber communication unit and the server computer comprises receiving a user ID of the group member and the authentication of the group member ,
    [18]
    A server computer according to any one of claims 10 to 17, characterized in that the processing means are arranged such that the transmission of streams by the streaming server is interrupted to subscriber communication units establishing a direct streaming connection between them.
    [19]
    19. A device for audio and video-based real-time communication between at least one master subscriber and a plurality of group participants, comprising a server computer according to one of claims 10 to 18, at least one master communication unit and at least one subscriber communication unit. Vienna, on 8 March 2011 applicant by

    类似技术:
    公开号 | 公开日 | 专利标题
    DE60038516T2|2008-07-31|Method and system for bandwidth reduction of multimedia conferences
    JP5345081B2|2013-11-20|Method and system for conducting resident meetings
    DE10191806B4|2007-02-22|Media role management in a video conferencing network
    DE69813039T2|2004-01-22|METHOD AND DEVICE FOR CARRYING OUT VIDEO CONFERENCES WITH SIMULTANEOUS ADDITION OF ADDITIONAL INFORMATION AND FILMS WITH TELEVISION MODALITIES
    DE69927713T2|2006-08-10|Announced session description
    US9596433B2|2017-03-14|System and method for a hybrid topology media conferencing system
    DE102012013336B4|2015-04-09|NEGOTIATING A CONTINUOUS MULTI-STREAM PRESENCE
    JP2005534207A5|2006-02-02|
    US20090015659A1|2009-01-15|Method and System for Moderating Multiparty Video/Audio Conference
    WO2011149359A1|2011-12-01|System and method for scalable media switching conferencing
    US9743043B2|2017-08-22|Method and system for handling content in videoconferencing
    EP1855437A1|2007-11-14|Method for setting up a Push-to-Talk communication connection
    DE60320099T2|2009-06-18|DEVICE AND METHOD FOR DISTRIBUTING STREAMED REAL-TIME INFORMATION BETWEEN CLIENTS
    AT511151B1|2013-06-15|METHOD AND DEVICE FOR AUDIO- AND VIDEO-BASED REAL-TIME COMMUNICATION
    DE60211383T2|2007-02-22|VIDEO CONFERENCE SYSTEM FOR WORKING OUT OF THE WORLD
    EP2340641B1|2016-04-20|Transmitting multimedia ticker information
    DE102010021770B4|2012-05-16|A method and apparatus for requesting media replication in a collaborative communication session and method and apparatus for assigning a communication medium to a collaborative communication session
    EP1428371B1|2005-02-23|Method for transmitting a data stream from a producer to a plurality of viewers
    WO2007082870A1|2007-07-26|Method and system for radio-based broadcast of a video signal
    EP2030474B1|2020-04-01|Method and system for establishing communication relations
    EP1709803A1|2006-10-11|Distribution of short messages by means of a video control device
    DE102004041884A1|2006-03-09|Communication terminal and method for controlling a communication terminal employs messages containing user identity information
    AT414292B|2006-11-15|METHOD FOR TRANSMITTING AUDIO AND VIDEO STREAMS VIA THE INTERNET BETWEEN MULTIPLE SOURCES OF DATA AND A DATA RATE
    DE102017110431A1|2018-11-15|Method for transmitting information
    DE102017108017A1|2018-10-18|Method for conducting an audio and / or video conference
    同族专利:
    公开号 | 公开日
    EP2498491A1|2012-09-12|
    AT511151B1|2013-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20040236830A1|2003-05-15|2004-11-25|Steve Nelson|Annotation management system|
    US20070285501A1|2006-06-09|2007-12-13|Wai Yim|Videoconference System Clustering|
    US6608636B1|1992-05-13|2003-08-19|Ncr Corporation|Server based virtual conferencing|
    US5862329A|1996-04-18|1999-01-19|International Business Machines Corporation|Method system and article of manufacture for multi-casting audio visual material|
    US6433813B1|1998-12-28|2002-08-13|Ameritech Corporation|Videoconferencing method and system for connecting a host with a plurality of participants|
    US7596595B2|2003-06-18|2009-09-29|Utah State University|Efficient unicast-based multicast tree construction and maintenance for multimedia transmission|
    US20070263824A1|2006-04-18|2007-11-15|Cisco Technology, Inc.|Network resource optimization in a video conference|
    US20080209330A1|2007-02-23|2008-08-28|Wesley Cruver|System and Method for Collaborative and Interactive Communication and Presentation over the Internet|
    US20110123972A1|2008-08-04|2011-05-26|Lior Friedman|System for automatic production of lectures and presentations for live or on-demand publishing and sharing|DE102014115188A1|2014-10-17|2016-04-21|Visocon Gmbh|Method for adapting a data stream to be transmitted to a resource utilization|
    CN111093048B|2019-12-31|2021-07-20|江苏大恒创科技术有限公司|Novel multimedia video conference system and implementation method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT3122011A|AT511151B1|2011-03-08|2011-03-08|METHOD AND DEVICE FOR AUDIO- AND VIDEO-BASED REAL-TIME COMMUNICATION|AT3122011A| AT511151B1|2011-03-08|2011-03-08|METHOD AND DEVICE FOR AUDIO- AND VIDEO-BASED REAL-TIME COMMUNICATION|
    EP12450010A| EP2498491A1|2011-03-08|2012-02-16|Method and system for audio and video-based real time communication|
    [返回顶部]