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Multiplex system capable of dividing a group into several subgroup in simple procedure

A multicast address and terminal technology, applied in the field of multicast systems, can solve problems such as complex group address management

Inactive Publication Date: 2002-07-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the greater the number of groups to be separated, the more complex the management of their group addresses

Method used

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  • Multiplex system capable of dividing a group into several subgroup in simple procedure
  • Multiplex system capable of dividing a group into several subgroup in simple procedure
  • Multiplex system capable of dividing a group into several subgroup in simple procedure

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0055] see Figures 4 to 9 , the first embodiment of the present invention will now be described.

[0056] Figure 4 The entire structure of a multicast conference system according to the first embodiment of the present invention will be described by way of example.

[0057] In this embodiment, one group address is used as sub-address information indicating that conference terminals belong to the same divided group. When it is required to divide participants into groups in which the group address is the same for all participants, a common group address which was already used by all participants before the group division continues to be used in each divided group. In each newly divided group, only participants belonging to each group can continue a multicast conference.

[0058] The difference with the traditional system is: in the case that the participants with the same group address are divided into multiple groups, there is no need to assign a new group address to the con...

no. 2 example

[0086] see Figure 5 , 12 and 13, the second embodiment of the present invention is now described. Incidentally, in the second embodiment, the same reference numerals are used for those components that are the same as or similar to those in the first embodiment, and thus their explanations are omitted or simplified in order to avoid duplication of description. Such an explanation method will be applied to the third and fourth embodiments which will be described later.

[0087] The second embodiment provides another structure of a conference terminal dedicated to a multicast conference.

[0088] Figure 5 The entire configuration of a multicast conference system according to the second embodiment is also illustrated. In this embodiment, the client conference terminal 100-2 will now be representatively detailed as follows.

[0089] Figure 12 detailed Figure 5 The structure of terminal 100-2 is shown. exist Figure 12 , now focus on explaining the operations of each co...

no. 3 example

[0103] see Figure 5 , 14 -17. Now, the third embodiment of the present invention will be described.

[0104] The third embodiment provides another terminal structure, which preferably can be used as the host (or chairman) conference terminal of a multicast conference. In this embodiment, it is necessary for such a terminal (hereinafter referred to as a host conference terminal) to have a function of issuing grouped requests to other client conference terminals.

[0105] Figure 5 The entire configuration of a multicast conference system according to the third embodiment is also illustrated. In this embodiment, the terminal 100-1 as a host conference terminal will now be described in detail as follows.

[0106] Figure 14 detailed Figure 5 The structure of terminal 100-1 is shown. exist Figure 14 , now focus on explaining the operations of each component, such as a newly introduced group member determination unit 301 , scene rewriter 204 and data reception control un...

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PUM

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Abstract

A conference terminal is incorporated in a multicast conferencing system. The conference terminal receives a request for division into groups. The request includes information indicating that the terminal belongs to which group. The terminal then produces, in response to the request, only the stream data coming from one or more other conference terminals belonging to the same group as the terminal. This production is realized by selectively accepting such stream data at a reception unit to which all stream data are transmitted from all the terminals having the same multicast address. Alternatively, the production is realized by selectively re-writing stream data at a scene re-writer. Thus, the produced stream data are replayed and displayed. The division of an entire group into plural small groups can be performed without additionally issuing multicast addresses.

Description

Field of invention: [0001] The present invention relates to a multicast system in which a plurality of terminals are distributed and connected via a network so that data can be transmitted in a multicast mode in the system. By way of example, the present invention is implemented as a multicast conference system having such a structure and capable of dividing an entire multicast conference group into a plurality of multicast conference groups with a simpler procedure. Background of the invention: [0002] related technology [0003] There has been a heightened demand for videoconferencing systems that allow people to meet, meet, meet, conference, or other event (ie, "conference") that are located far apart from each other. A multicast conferencing system is an example of such a system. [0004] A conventional system of a multicast conference is shown in FIG. 1, in which a plurality of conference terminals 2001-a to 2001-d are connected to each other via a communication netw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/15H04L12/18H04L29/06
CPCH04L65/4076H04L29/06027H04L29/06421H04L29/06455H04L29/06H04L65/4038H04L65/611H04W4/06H04L12/18H04L9/40H04L65/1101
Inventor 千賀谕井上秋乃佐藤正樹岡敏夫高木利匡
Owner PANASONIC CORP
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