System and apparatus to provide a backchannel for a receiver terminal in a conference

• US 6,202,084 B1
• Filed: 06/14/1999
• Issued: 03/13/2001
• Est. Priority Date: 10/31/1997
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Kumar, Vineet, Bhasker, Narjala
• Primary Examiner(s): VU, VIET DUY
• Application Number:
  US09/333,174
• Time in Patent Office: 638 Days
• Field of Search: 709/204, 709/205, 709/206, 709/207, 709/217, 709/219, 709/223, 709/225, 709/227, 709/237, 709/313, 709/329, 370/260, 370/261, 370/264, 370/265, 370/390
• US Class Current: 709/204
• CPC Class Codes: H04N 7/152 Multipoint control units therefor

Abstract

A computer program product and system for providing a back-channel for a receiver terminal in a conference is described. In one embodiment, the computer program product includes a computer usable medium having computer program code embodied therein to receive media streams of one or more terminals in a panel on a multicast address. The computer program product further includes computer readable program code to connect to a multipoint controller in the panel by using a multipoint address, and computer readable program code to join the panel to transmit and receive media streams on the multicast address and for establishing bi-directional communication with the one or more terminals.

Claims

1. A computer program product comprising:

a computer usable medium, the computer usable medium including,

computer program code to receive media streams of one or more H.323 terminals in an H.323 panel on a multicast address;

computer readable program code to connect to a multipoint controller in the H.323 panel by using a multipoint address;

computer readable program code to join the H.323 panel to transmit and receive media streams on the multicast address and for establishing bi-directional communication with the one or more H.323 terminals; and

computer readable program code to disconnect from the multipoint controller to leave the H.323 panel while simultaneously receiving the media streams on the multicast address.

2. The computer program product of claim 1 wherein

the computer program code to receive media streams of the one or more H.323 terminals comprises

computer program code to receive media streams of the one or more H.323 terminals in the H.323 panel by connecting to the multicast address without connecting to the multipoint controller.

3. The computer program product of claim 1 wherein

the media streams include audio and/or video streams.

4. The computer program product of claim 1 wherein

each of the one or more H.323 terminals and the multipoint controller transmits and receives media streams on the multicast address.

5. The computer program product of claim 1 wherein

the multipoint controller is a multipoint controller unit.

6. The computer program product of claim 5 wherein each of the one or more H.323 terminals transmits and receives media streams directly with the multipoint controller unit in a point-to-point manner, the multipoint controller unit transmitting a mixed signal of the one or more H.323 terminals on the multicast address.

7. A computer data signal comprising:

a receiving code segment to receive media streams of one or more H.323 terminals in an H.323 panel on a multicast address;

a connecting code segment to connect to a multipoint controller in the H.323 panel by using a multipoint address;

a joining code segment to join the H.323 panel to transmit and receive media streams on the multicast address and for establishing bi-directional communication with the one or more H.323 terminals; and

a disconnecting code segment to disconnect from the multipoint controller to leave the H.323 panel while simultaneously receiving the media streams on the multicast address.

8. The computer data signal of claim 7 wherein

the receiving code segment receives media streams of the one or more H.323 terminals in the H.323 panel by connecting to the multicast address without connecting to the multipoint controller.

9. The computer data signal of claim 7 wherein

the media streams include audio and/or video streams.

16. The computer data signal of claim 7 wherein,

the media streams include audio and/or video streams.

17. The computer data signal of claim 7 wherein,

the multipoint controller is a multipoint controller unit.

10. A system for providing a back-channel for a receiver terminal in a conference, comprising:

a panel including,

a multipoint controller having a multipoint address, said multipoint controller transmitting media streams on a media channel having a multicast address, and

one or more terminals coupled to the multipoint controller on a control channel, using the multipoint address, each of the one or more terminals to transmit and receive media streams on the media channel; and

a receiver terminal coupled to receive the media streams of the multipoint controller and the one or more terminals on the media channel, the receiver terminal, using the multipoint address, connects to the multipoint controller on the control channel, and joins the panel to transmit and receive media streams on the media channel, the receiver terminal to disconnect from the multipoint controller on the control channel and leave the panel while remaining connected to the media channel.

18. The system of claim 10 wherein,

the panel is a H.323 panel and each of the one or more terminals is a H.323 terminal.

19. The system of claim 10 wherein,

the media streams include audio and/or video streams.

20. The system of claim 10 wherein,

the multipoint controller is a multipoint controller unit.

11. A system for providing a back-channel for a receiver terminal in a conference, comprising:

an H.323 panel including,

a multipoint controller unit (MCU) having a multipoint address,

one or more H.323 terminals each coupled to the MCU on a control channel and a media channel, using the multipoint address,

wherein the MCU mixes the media streams of the one or more H.323 terminals providing a mixed media stream, and transmits the mixed media stream to the one or more H.323 terminals on a media channel having a multicast address; and

a receiver terminal coupled to the media channel using the multicast address to receive the mixed media stream, the receiver terminal, using the multipoint address, connects to the MCU on the control and media channels and joins the panel to transmit and receive media streams, the receiver terminal to disconnect from the MCU on the control channel and leave the panel while remaining connected to the media channel.

12. The system of claim 11 wherein,

the media streams include audio and/or video streams.

13. The system of claim 11 wherein,

each of the one or more H.323 terminals and the multipoint controller unit transmit and receive media streams on the multicast address.

14. The system of claim 11 wherein,

each of the one or more H.323 terminals transmit and receive media streams directly with the multipoint controller unit in a point-to-point manner, the multipoint controller unit transmitting a mixed signal of the one or more H.323 terminals on the multicast address.

15. The system of claim 11 wherein,

the one or more H.323 terminals in the H.323 panel receive media streams by connecting to the multicast address without connecting to the multipoint controller.

21. The system of claim 11 wherein,

the media streams include audio and/or video streams.