WO2005029738B1 - Method and apparatus for synchronizing audio and video in encrypted videoconferences - Google Patents

Method and apparatus for synchronizing audio and video in encrypted videoconferences

Info

Publication number
WO2005029738B1
WO2005029738B1 PCT/US2004/029904 US2004029904W WO2005029738B1 WO 2005029738 B1 WO2005029738 B1 WO 2005029738B1 US 2004029904 W US2004029904 W US 2004029904W WO 2005029738 B1 WO2005029738 B1 WO 2005029738B1
Authority
WO
WIPO (PCT)
Prior art keywords
audio
site
video
encrypted
signal
Prior art date
Application number
PCT/US2004/029904
Other languages
French (fr)
Other versions
WO2005029738A3 (en
WO2005029738A2 (en
Filing date
Publication date
Priority claimed from US10/661,110 external-priority patent/US7464262B2/en
Application filed filed Critical
Publication of WO2005029738A2 publication Critical patent/WO2005029738A2/en
Publication of WO2005029738A3 publication Critical patent/WO2005029738A3/en
Publication of WO2005029738B1 publication Critical patent/WO2005029738B1/en

Links

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.

Claims

AMENDED CLAIMS[received by the International Bureau on 20 January 2006 (20.01.2006); original claims 1-28 amended (5 pages)]
1. An apparatus for synchronizing audio and video in videoconferences, comprising: a plurality of conference sites; and a hub for receiving a composite audio and video signal from each site, determining for each site a currently displayed composite audio and video signal, and transmitting said currently displayed composite audio and video signal to each of said sites; said hub receiving an audio only signal from each site; wherein said hub separately routes all incoming audio only signals to each site.
2. The apparatus of Claim 1 , wherein said audio only signal for a site comprises: a mixed audio signal composed of audio obtained from several microphones at said site.
3. The apparatus of Claim 1 , wherein said composite audio and video signals are encrypted.
4. The apparatus of Claim 1 , wherein said composite audio and video signals are compressed.
5. The apparatus of Claim 1 , wherein said composite audio and video signals are both encrypted and compressed.
6. The apparatus of Claim 5, each site comprising: a decoder for decrypting and decompressing video within said currently displayed composite audio and video signal.
7. The apparatus of Claim 1 , wherein said audio only signal from each site is encrypted and compressed, each site comprising: a decoder for decrypting and decompressing said compressed and encrypted audio only signal from each site. 15
8. The apparatus of Claim 1 , each site comprising: an audio deselection and mixing device for deselecting an audio only signal corresponding to an audio portion of said currently displayed composite audio and video signal, 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.
9. The apparatus of Claim 8, said audio deselection and mixing device further comprising: delay circuitry for aligning said audio only signals with said composite audio and video signal.
10. The apparatus of Claim 1 , wherein said hub transmits at least two composite audio and video signals to each site to provide a split screen display at each site.
11. The apparatus of Claim 10, wherein those of said audio only signals which correspond to said at least two composite audio and video signals are deselected at each said site.
12. The apparatus of Claim 1 , further comprising: an audio deselection hub for deselecting those audio only signals not directly associated with an ongoing conversation.
13. 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 receiving a compressed and encrypted 16 audio only signal from each site; wherein said hub separat incoming compressed and encrypted audio only signals to each site.
14. The method of Claim 13. wherein audio for a site comprises: a mixed audio signal composed of audio obtained from several microphones at said site.
15. The method of Claim 13, wherein said composite audio and video signals are encrypted.
16. The method of Claim 13, wherein said composite audio and video signals are compressed.
17. The method of Claim 13, wherein said composite audio and video signals are both encrypted and compressed.
18. The method of Claim 17, performing at each site the steps comprising:
decrypting and decompressing video within said composite audio and video signal for said currently active site.
19. The method of Claim 13, wherein said audio only signal from each site is encrypted and compressed and further comprising performing at each site the steps comprising: decrypting and decompressing said compressed and encrypted audio only signal from each site.
20. The method of Claim 13, performing at each site the steps comprising: 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 all other audio only signals at said site; wherein audio associated with displayed video is synchronized with said displayed video. 17
21. The method of Claim 20, said audio deselection and mixing steps further comprising the step of: aligning said audio only signals with said composite audio and video signal.
22. The method of Claim 13, wherein said hub transmits at least two composite audio and video signals to each site to provide a split screen display at each site.
23. The method of Claim 22, wherein those of said audio only signals which correspond to said at least two composite audio and video signals are deselected at each said site.
24. The method of Claim 13, further comprising the step of: deselecting those audio only signals not directly associated with an ongoing conversation.
25. An apparatus for synchronizing audio and video in encrypted videoconferences, comprising: 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 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.
26. An apparatus for synchronizing audio and video in encrypted videoconferences among a plurality of sites, at least two of said sites comprising: 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; and 18 an audio deselection and mixing device for deselecting 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.
27. A method for synchronizing audio and video in encrypted videoconferences, comprising the steps of: 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; 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.
28. A method for synchronizing audio and video in encrypted videoconferences among a plurality of sites, comprising at at least two of said sites the steps of: 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 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 all other audio only signals at said site; wherein audio associated with displayed video is synchronized with said displayed video.
PCT/US2004/029904 2003-09-12 2004-09-10 Method and apparatus for synchronizing audio and video in encrypted videoconferences WO2005029738A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/661,110 2003-09-12
US10/661,110 US7464262B2 (en) 2003-09-12 2003-09-12 Method and apparatus for synchronizing audio and video in encrypted videoconferences

Publications (3)

Publication Number Publication Date
WO2005029738A2 WO2005029738A2 (en) 2005-03-31
WO2005029738A3 WO2005029738A3 (en) 2006-01-12
WO2005029738B1 true WO2005029738B1 (en) 2006-03-23

Family

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Family Applications (1)

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PCT/US2004/029904 WO2005029738A2 (en) 2003-09-12 2004-09-10 Method and apparatus for synchronizing audio and video in encrypted videoconferences

Country Status (2)

Country Link
US (2) US7464262B2 (en)
WO (1) WO2005029738A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7464262B2 (en) * 2003-09-12 2008-12-09 Applied Minds, Inc. Method and apparatus for synchronizing audio and video in encrypted videoconferences
US20080273078A1 (en) * 2007-05-01 2008-11-06 Scott Grasley Videoconferencing audio distribution
US7908490B2 (en) * 2007-06-28 2011-03-15 Novell, Inc. Techniques for synchronizing and archive-versioning of encrypted files
US8423470B2 (en) 2007-09-21 2013-04-16 Microsoft Corporation Distributed secure anonymous conferencing
US10629311B2 (en) 2010-07-30 2020-04-21 Fawzi Shaya System, method and apparatus for real-time access to networked radiology data
US20160302666A1 (en) * 2010-07-30 2016-10-20 Fawzi Shaya System, method and apparatus for performing real-time virtual medical examinations
US9954909B2 (en) 2013-08-27 2018-04-24 Cisco Technology, Inc. System and associated methodology for enhancing communication sessions between multiple users
WO2015106156A1 (en) * 2014-01-10 2015-07-16 Revolve Robotics, Inc. Systems and methods for controlling robotic stands during videoconference operation
US11088861B2 (en) 2019-08-16 2021-08-10 Logitech Europe S.A. Video conference system
US11258982B2 (en) 2019-08-16 2022-02-22 Logitech Europe S.A. Video conference system
US11095467B2 (en) 2019-08-16 2021-08-17 Logitech Europe S.A. Video conference system
US11038704B2 (en) * 2019-08-16 2021-06-15 Logitech Europe S.A. Video conference system

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE575134A (en) * 1958-01-28
US4172896A (en) * 1978-06-05 1979-10-30 Dainippon Pharmaceutical Co., Ltd. Methane-sulfonamide derivatives, the preparation thereof and composition comprising the same
US4768190A (en) * 1986-04-30 1988-08-30 Og Corporation Packet switching network
US5484763A (en) * 1995-02-10 1996-01-16 American Cyanamid Company Substituted benzisoxazole and benzisothiazole herbicidal agents
KR0163723B1 (en) * 1995-03-20 1999-01-15 김광호 Apparatus of controlling a video conferencing of a video conferencing system using isdn
US5841763A (en) * 1995-06-13 1998-11-24 Multilink, Inc. Audio-video conferencing system
EP0868795A4 (en) * 1995-12-21 2000-04-19 Intel Corp Method and apparatus for integrating video, voice and computer data traffic in a single, conferencing system using existing telephone and catv connections
US6909708B1 (en) * 1996-11-18 2005-06-21 Mci Communications Corporation System, method and article of manufacture for a communication system architecture including video conferencing
US6335927B1 (en) * 1996-11-18 2002-01-01 Mci Communications Corporation System and method for providing requested quality of service in a hybrid network
US7145898B1 (en) * 1996-11-18 2006-12-05 Mci Communications Corporation System, method and article of manufacture for selecting a gateway of a hybrid communication system architecture
US5867494A (en) * 1996-11-18 1999-02-02 Mci Communication Corporation System, method and article of manufacture with integrated video conferencing billing in a communication system architecture
US6754181B1 (en) * 1996-11-18 2004-06-22 Mci Communications Corporation System and method for a directory service supporting a hybrid communication system architecture
US5999525A (en) * 1996-11-18 1999-12-07 Mci Communications Corporation Method for video telephony over a hybrid network
US5886734A (en) 1997-01-28 1999-03-23 Videoserver, Inc. Apparatus and method for storage and playback of video images and audio messages in multipoint videoconferencing
US6731625B1 (en) * 1997-02-10 2004-05-04 Mci Communications Corporation System, method and article of manufacture for a call back architecture in a hybrid network with support for internet telephony
US6262978B1 (en) * 1998-03-20 2001-07-17 At&T Corp. Call completion of video telephone/teleconference call as packet voice call
US6851053B1 (en) * 1999-03-02 2005-02-01 Microsoft Corporation Multiparty conference authentication
US6728221B1 (en) * 1999-04-09 2004-04-27 Siemens Information & Communication Networks, Inc. Method and apparatus for efficiently utilizing conference bridge capacity
US6442758B1 (en) * 1999-09-24 2002-08-27 Convedia Corporation Multimedia conferencing system having a central processing hub for processing video and audio data for remote users
CN1192618C (en) * 2000-04-28 2005-03-09 瑞士电信流动电话公司 Method and system for video conferences
US20020093531A1 (en) * 2001-01-17 2002-07-18 John Barile Adaptive display for video conferences
US20070285504A1 (en) * 2002-02-15 2007-12-13 Hesse Thomas H Systems and methods for conferencing among governed and external participants
US7046779B2 (en) * 2002-02-15 2006-05-16 Multimedia Telesys, Inc. Video conference system and methods for use at multi-station sites
US20050084086A1 (en) * 2002-02-15 2005-04-21 Hesse Thomas H. Systems and methods for conferencing among governed and external participants
US7362349B2 (en) * 2002-07-10 2008-04-22 Seiko Epson Corporation Multi-participant conference system with controllable content delivery using a client monitor back-channel
US20040008249A1 (en) * 2002-07-10 2004-01-15 Steve Nelson Method and apparatus for controllable conference content via back-channel video interface
US7464262B2 (en) * 2003-09-12 2008-12-09 Applied Minds, Inc. Method and apparatus for synchronizing audio and video in encrypted videoconferences
US8659636B2 (en) * 2003-10-08 2014-02-25 Cisco Technology, Inc. System and method for performing distributed video conferencing
US7180535B2 (en) * 2004-12-16 2007-02-20 Nokia Corporation Method, hub system and terminal equipment for videoconferencing
US20060244818A1 (en) * 2005-04-28 2006-11-02 Comotiv Systems, Inc. Web-based conferencing system
JP2009543452A (en) * 2006-06-28 2009-12-03 ヴィ２ テクノロジー， インコーポレイテッド Method and apparatus for a single chassis communication server having a connection only interface
US8194116B2 (en) * 2008-11-10 2012-06-05 The Boeing Company System and method for multipoint video teleconferencing

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