JPH059090U - Multipoint video conference controller - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a multipoint videoconferencing control device capable of leaving a general conference and performing individual voice meetings in a multipoint multipoint videoconferencing system. [Structure] In addition to the audio mixing circuit for the general conference, an audio mixing circuit for individual meetings was provided. Alternatively,
The unused audio mixing circuit for the general conference was used for individual meetings. [Effect] It is now possible to get out of the general conference and hold individual voice meetings.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multipoint videoconferencing control device for realizing a simultaneous multipoint videoconferencing between videoconferencing terminals at three or more points.

[0002]

[Prior Art]

 Fig. 3 shows a conventional multi-point teleconference control device shown in, for example, Mitsubishi Electric Technical Report Vol.64, NO12, 1990. In the figure, 1 is an ISDN BASIC I / F unit that controls connection with each terminal, 2 is an ISDN PRIMARY I / F unit, 3 is a transmission control unit, 4 is a video processing unit, 5 is an audio codec unit, and 6 is audio. A mixing unit, 7 is a system control unit.

Next, the operation will be described. In FIG. 3, call control with video conference terminals at multiple points is performed by the ISDN BASIC I / F unit 1 via the ISDN (2B + D) network. Also, the video / audio data received from each connected point via the ISDN (4H ₀ / 24B) network is separated by the ISDN PRIMARY I / F section 2 into data for each point, and the transmission control section 3 , It is separated into video and audio data. The separated video data is switched by the video processing unit for each point based on an instruction from the system control unit 7, and is sent to the transmission control unit 3 for each point. Further, the separated voice data is decoded by the voice codec unit 5, the voices of all points participating in the conference are mixed by the voice mixing unit, the voice of the own station is removed, and the voice codec unit 5 encodes again. It is sent to the transmission control unit 3. These video / audio data are combined at each point by the transmission control unit 3 and transmitted to each point via the ISDN PRIMARY I / F unit 2. The system controller 7 controls each of these parts.

[0004]

[Problems to be solved by the device]

 The conventional multi-point video conference control device is configured as described above. In particular, audio is mixed at all points, and since there is only one mixing circuit for one conference, individual meetings cannot be held during the conference. There was a problem.

The present invention has been made to solve the above problems, and by providing a plurality of audio mixing circuits for each conference, only the audio can be temporarily skipped from the general conference and individual audio can be removed. It provides a system that can hold meetings.

[0006]

[Means for Solving the Problems]

 The multipoint video conference control device according to the present invention is provided with a plurality of audio mixing circuits per conference.

[0007]

[Action]

 Since the multipoint video conference control device according to the present invention is provided with a plurality of audio mixing circuits per conference, a voice conference different from the general conference can be held.

[0008]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is an ISDN BASIC I / F unit that controls connection with each terminal, 2 is an ISDN PRIMARY I / F unit, 3 is a transmission control unit, 4 is a video processing unit, 5 is an audio codec unit, and 6 is Audio mixing units 6a, 6b, 6c, 6d are audio mixing circuits, and 7 is a system control unit.

Next, the operation will be described. In FIG. 1, the operations of the ISDN BASIC I / F unit 1, the ISDN PRIMARY I / F unit 2, the transmission control unit 3, the video processing unit 4, and the audio codec unit 5 are the same as those in the conventional technique.

The voice is decoded by the voice codec unit 5 and input to the voice mixing unit 6 as in the prior art. The audio mixing unit 6 has four mixing circuits, audio mixing circuits 6a and 6b for the A conference, and audio mixing circuits 6c and 6d for the B conference. For example, when the A conference is held, the voices of all terminals participating in the conference are usually mixed in the same manner as in the past. When a request for individual meeting is received from a terminal in the middle of a meeting, the system control unit 7 mixes the sound of the individual meeting terminal with the mixing circuit 6b, and mixes the sounds of other terminals with the mixing circuit 6a. The circuit is switched as described above. The mixed voice is removed from the voice of its own station, encoded again by the voice codec unit 5, and transmitted from the transmission control unit 3 to each terminal. When the B conference is being held in parallel with the A conference, it is possible to use the mixing circuits 6c and 6d to hold an individual meeting with the general conference as in the A conference.

Example 2. In the above embodiment, the audio mixing circuit has two circuits for one conference, four circuits in total, but when only two circuits are provided and only one conference is held, an unused mixing circuit is provided. The same effect can be obtained by using the circuit for individual meetings. In FIG. 3, when the A conference is held, first, the voices of all the terminals participating in the conference are mixed by the mixing circuit 6e. The mixing circuit 6f is a mixing circuit for the B conference. However, when a request for an individual meeting is received from the terminal in the middle of the A conference, the system control unit 7 determines whether the B conference mixing circuit 6f is being used. If it is not used, the circuit is switched so that it will be used as an individual meeting for the A conference.

[0012]

[Effect of the device]

 As described above, according to this invention, it is possible to hold two or more audio conferences at the same time in one conference, so that individual meetings can be held during the general conference.

[Brief description of drawings]

FIG. 1 is a block diagram of a multipoint video conference control device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing another embodiment of the present invention.

FIG. 3 is a block diagram of a conventional multi-point video conference control device.

[Explanation of code] 1 ISDN BASIC I / F section 2 ISDN PRIMARY I / F section 3 Transmission control section 4 Video processing section 5 Audio codec section 6 Audio mixing section 6a A Conference whole meeting audio mixing circuit 6b A Conference individual meeting Audio mixing circuit 6c audio conference mixing circuit 6B audio conference mixing circuit 6d audio conference mixing conference audio mixing circuit 6e audio conference audio mixing circuit 6f audio conference mixing circuit 7 system control unit

Claims (1)

[Claims for utility model registration] [Claim 1] A function of simultaneously holding two or more voice conferences in one conference in a video conference system in which a teleconference is held simultaneously among video conference terminals at three or more points. A multi-point video conference control device having: