Method and apparatus for synchronizing audio and video in encrypted videoconferences
First Claim
1. A method for synchronizing audio and video in encrypted videoconferences, comprising the steps of:
- providing a plurality of conference sites; and
providing a hub for receiving a compressed and encrypted, composite audio and video signal from each site, for determining a currently active site, and for transmitting said composite audio and video signal from said currently active site to all other sites;
said hub separately receiving a compressed and encrypted audio only signal from each site;
wherein said hub separately routes all incoming compressed and encrypted audio only signals to each site.
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Accused Products
Abstract
The invention provides a system that preserves the synchronization of the audio and video presented at a secure conferencing site without necessitating decryption, decompression, compression, and encryption of signals at the hub. The presently preferred embodiment of the invention provides an apparatus and method for synchronizing audio and video in encrypted videoconferences that comprises a plurality of conference sites; and a hub for receiving a compressed and encrypted, composite audio and video signal from each site, for determining a currently active site, and for transmitting said composite audio and video signal from said currently active site to all other sites; said hub receiving a compressed and encrypted audio only signal from each site; wherein said hub routes all incoming compressed and encrypted audio only signals to each site.
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Citations
13 Claims
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1. A method for synchronizing audio and video in encrypted videoconferences, comprising the steps of:
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providing a plurality of conference sites; and providing a hub for receiving a compressed and encrypted, composite audio and video signal from each site, for determining a currently active site, and for transmitting said composite audio and video signal from said currently active site to all other sites; said hub separately receiving a compressed and encrypted audio only signal from each site; wherein said hub separately routes all incoming compressed and encrypted audio only signals to each site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for synchronizing audio and video in encrypted videoconferences, comprising:
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a hub for receiving a compressed and encrypted, composite audio and video signal from a plurality of sites, for determining a currently active site, and for transmitting said composite audio and video signal from said currently active site to all other sites; said hub separately receiving a compressed and encrypted audio only signal from each site; wherein said hub routes all incoming compressed and encrypted audio only signals to each site, separately from said composite audio and video signal.
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11. An apparatus for synchronizing audio and video in encrypted videoconferences among a plurality of sites, at least two of said sites comprising:
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a decoder for decrypting and decompressing video within a composite audio and video signal for a currently active site; a decoder for decrypting and decompressing a compressed and encrypted audio only signal from each site separately from said composite audio and video signal; and an audio deselection and mixing device for deselecting an audio only signal corresponding to an audio portion of said composite audio and video signal for said currently active site, and for mixing said audio portion of said composite audio and video signal for said currently active site with all other audio only signals at said site; wherein audio associated with displayed video is synchronized with said displayed video.
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12. A method for synchronizing audio and video in encrypted videoconferences, comprising the steps of:
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receiving a compressed and encrypted, composite audio and video signal from a plurality of sites at a hub; determining a currently active site; transmitting said composite audio and video signal from said currently active site to all other sites with said hub; separately receiving a compressed and encrypted audio only signal at said hub from each site; and routing all incoming compressed and encrypted audio only signals to each site from said hub separately from said composite audio and video signal.
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13. A method for synchronizing audio and video in encrypted videoconferences among a plurality of sites, comprising at least two of said sites the steps of:
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decrypting and decompressing video within a composite audio and video signal for a currently active site; decrypting and decompressing a compressed and encrypted audio only signal separately received from each site; and deselecting an audio only signal corresponding to an audio portion of said composite audio and video signal for said currently active site; and mixing said audio portion of said composite audio and video signal for said currently active site with audio only signals separately received from each site at said currently active site; wherein audio associated with displayed video is synchronized with said displayed video.
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Specification