Video management system over satellite

Abstract

A videoconference system has videoconference terminals which communicate with a centralized station over satellite. Video signals from each videoconference terminal are unicast to the centralized station via satellite. The centralized station forms a composite signal of all the video signals multicasts the composite signal to the local videoconference terminals over satellite that can be received by hundreds, thousands or more recipients. The system dynamically allocates satellite bandwidth and other network resources to establish a high definition videoconference call on demand. A frequency allocation manager manages the resources available on the satellite network according with the capacity of each transponder and network resources available. It administrates the resources available and dynamically assigns a satellite capacity and network resources.

1 . A videoconference system comprising:
 a plurality of videoconference terminals each configured to generate a videoconference signal and transmit the videoconference signal on a designated channel amongst a plurality of channels;   a router configured to receive the videoconference signals from each of the plurality of channels; and   a control module configured to form a composite videoconference signal having the received videoconference signals, and transmit the composite videoconference signal over a multicast channel different from the plurality of channels, wherein the plurality of videoconference terminals receive the composite videoconference signal and present the videoconference signal.   
     
     
         2 . The system of  claim 1 , wherein the plurality of channels each comprise a unique frequency allocated on demand and retransmitted via a satellite multicast to all videoconferencing participants. 
     
     
         3 . The system of  claim 1 , wherein the composite videoconference signal comprises a continuous presence videoconference signal over a multicast channel available to all videoconferencing participants. 
     
     
         4 . The system of  claim 1 , further comprising a frequency allocation manager configured to receive a communication request from one of the plurality of videoconference terminals, determine availability of the plurality of channels, and assign one of the plurality of channels to the one of the plurality of videoconference terminals on demand based on the determined availability. 
     
     
         5 . The system of  claim 1 , wherein each of said plurality of videoconference terminals are further configured to eliminate the videoconference signal from the composite signal which was generated by that respective one of said plurality of videoconference terminals, and to present the videoconference signals from the composite signal which were not generated by that respective one of said plurality of videoconference terminals. 
     
     
         6 . The system of  claim 1 , wherein the control module comprises a media control unit. 
     
     
         7 . The system of  claim 1 , wherein said plurality of videoconference terminals are further configured to transmit a command signal over a dedicated TDMA channel different than the plurality of channels. 
     
     
         8 . The system of  claim 7 , wherein the command signal comprises a videoconference initiation request. 
     
     
         9 . The system of  claim 8 , further comprising a user interface configured to generate the videoconference initiation request in response to a user input. 
     
     
         10 . The system of  claim 8 , wherein said router and said control module are at a central location and communicate via satellite with said plurality of videoconference terminals to control frequency assignments on demand. 
     
     
         11 . A videoconference system comprising:
 a first videoconference terminal configured to generate a videoconference signal and transmit the videoconference signal on a first channel;   a router configured to receive the videoconference signal from the first channel;   a control module configured to send the received videoconference signal over a satellite on a second channel different from the first channel; and   a second videoconference terminal configured to receive the videoconference signal on the second channel and present the videoconference signal.   
     
     
         12 . The system of  claim 10 , wherein said system has a star configuration. 
     
     
         13 . The system of  claim 10 , wherein said first videoconference terminal is further configured to receive the videoconference signal on the second channel and present the videoconference signal. 
     
     
         14 . The system of  claim 10 , wherein said second videoconference terminal comprises a display and said second videoconference terminal is configured to display the videoconference signal on said display. 
     
     
         15 . A videoconference system comprising a plurality of videoconference terminals each configured to generate a videoconference signal and transmit the videoconference signal on a designated channel amongst a plurality of channels to a centralized server which forms a composite videoconference signal having the received videoconference signals, each of said plurality of videoconference terminals further configured to receive a composite videoconference signal over a multicast channel different from the plurality of channels from the centralized server, and present the videoconference signal. 
     
     
         16 . A videoconference system comprising a centralized server associated with a plurality of communication channels and a dedicated TDMA channel, said centralized server configured to receive a videoconference request signal from one of a plurality of videoconference terminals over the dedicated TDMA channel, determine the availability of the plurality of communication channels, and assign one of the plurality of communication channels to the requesting videoconference terminal. 
     
     
         17 . The videoconference system of  claim 16 , said centralized server further configured to receive videoconference signals over each of the plurality of communication channels from the videoconference terminals, and create a composite signal including each of the videoconference signals. 
     
     
         18 . The videoconference system of  claim 17 , the videoconference request signal identifying authorized videoconference terminals and said centralized server is further configured to associate with the composite signal an address for each of the requesting videoconference terminal and the authorized videoconference terminals. 
     
     
         19 . The videoconference system of  claim 17 , said centralized server further configured to transmit the composite signal over a multicast channel different than the plurality of communication channels. 
     
     
         20 . The videoconference system of  claim 16 , wherein the communication channels are satellite communication channels and the centralized server communicates with the plurality of videoconference terminals via satellite only. 
     
     
         21 . A videoconference system comprising:
 a frequency allocation manager in communication with a plurality of communication channels, said frequency allocation manager configured to receive a communication request from one of a plurality of videoconference terminals, determine availability of the plurality of communication channels, assign one of the plurality of communication channels to the one of the plurality of videoconference terminals on demand based on the determined availability, receive videoconference signals from the plurality of videoconference terminals, and retransmit a composite videoconference signal via a multicast channel to all of the plurality of videoconference terminals.   
     
     
         22 . A videoconference system comprising:
 a plurality of videoconference terminals configured to receive a composite videoconference signal having video signals from each of the plurality of videoconference terminals, and to eliminate the video signal from the composite videoconference signal which was generated by that respective one of said plurality of videoconference terminals, and to present the video signals from the composite signal which were generated by the other ones of said plurality of videoconference terminals.   
     
     
         23 . A videoconference system comprising:
 a plurality of videoconference terminals having an SCPC modem configured to transmit a video signal over one of a plurality of SCPC channels, said plurality of videoconference terminals further configured to transmit a request signal over a dedicated TDM/TDMA channel to control the SCPC modem.   
     
     
         24 . The system of  claim 23 , further comprising a frequency allocation manager configured to receive the request signal over the dedicated TDM/TDMA channel from one of the plurality of videoconference terminals, determine availability of the plurality of SCPC channels, and assign one of the plurality of SCPC channels to the one of the plurality of videoconference terminals on demand based on the determined availability.