[특허]Multipoint video conference system

[미국특허] Multipoint video conference system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04N-007/14
출원번호	US-0563114 (1995-11-27)
우선권정보	JP-0291087 (1994-11-25)
발명자 / 주소	Iizawa Junichi,JPX
출원인 / 주소	NEC Corporation, JPX
대리인 / 주소	Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
인용정보	피인용 횟수 : 43 인용 특허 : 7

초록 ▼

A multipoint video conference system includes a plurality of conference terminals, placed at remote points in correspondence with participants in a conference, for transmitting/receiving speech and image signals from/to the participants, and a video conference controller for transmitting/receiving speech and image signals to/from the conference terminals. The video conference controller includes an audio mixer, an identifying section, a frame selecting section, and multiplexers. The audio mixer forms a synthetic speech signal by synthesizing speech signals from the conference terminals. The identifying section detects speech signals from the conference terminals and identifies the conference terminal through which the participant has made utterance. The frame selecting section forms a multi-image signal by selecting image signals equal in number to multiple frames from the image signals from the conference terminals on the basis of the identification result obtained by the identifying section. The multiplexers receive the speech and image signals from the conference terminals and transmit the synthetic speech signal from the audio mixer and the multi-image signal from the frame selecting section to the conference terminals.

대표청구항 ▼

[ What is claimed is:] [1.] A multipoint video conference system comprising a plurality of conference terminals, said conference terminals located at remote points which correspond to participants in a conference, for transmitting/receiving speech and image signals to/from the participants, and a video conference controller for controlling transmitting/receiving of speech utterance signals and image signals through said conference terminals, said video conference controller comprising:speech synthesizing means for forming a synthetic speech signal by synthesizing speech utterance signals received from said conference terminals;identifying means for detecting said speech utterance signals from said conference terminals, identifying said conference terminal through which one of said participants has made a speech utterance and producing an identification result;wherein said identifying means comprisesutterance detecting means for detecting the presence/absence of a speech utterance signal from each of said conference terminals by monitoring said speech utterance signal therefrom;utterance time measuring means for measuring an utterance time of the speech utterance of said one of said participants whose utterance is detected by said utterance detecting means;memory means for storing utterance times measured by said utterance time measuring means in correspondence with said conference terminals; andnon-utterance time measuring means for measuring a non-utterance time of said one of said participants whose speech utterance has been detected by said utterance detecting means and for subtracting the measured non-utterance time from the utterance time stored in said memory means, wherein said non-utterance time measuring means measures said non-utterance time when said non-utterance time is greater than a predetermined time period, and wherein said multi-image signal contains image signals from said conference terminals which are selected in the order of increasing utterance times stored in said memory means;frame selecting means for forming a multi-image signal, said multi-image signal comprising a number of image signals equal to a number of multiple frames contained in the image signals of said conference terminals, said number of image signals corresponding to said identification result so that image signals from conference terminals through which said one of said participants making a speech utterance is included in said multi-image signal; andtransmission/reception means for receiving the speech utterance signals and image signals from said conference terminals and transmitting the synthetic speech signal from said speech synthesizing means and the multi-image signal from said frame selecting means to said conference terminals.

이 특허에 인용된 특허 (7) 인용/피인용 타임라인 분석

Boerger Georg (Berlin DEX) Romahn Gtz (Berlin DEX), Communication system for videoconferencing.
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Goutmann Michel M. H. (Fort Washington PA) Harper Robert C. (Oreland PA), Digital voice conferencer.
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Hsing To R. (Sudbury MA), Framed digital voice summing for teleconferencing.
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Bass Ann H. (Lisle IL) Blaschak Jeffery G. (Downers Grove IL) Marouf Mohamed A. (Lisle IL) Vancil Paul W. (Lisle IL) Winchell David F. (Glen Ellyn IL), Method and apparatus for controlling ports in a digital conference arrangement.
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Hatanaka Masanobu (Kawasaki JPX) Takei Hitoshi (Kawasaki JPX) Sano Shoichi (Kawasaki JPX) Natori Hiroaki (Kawasaki JPX) Okazaki Reiko (Kawasaki JPX) Tamuki Shoichi (Kawasaki JPX), Multi-location control apparatus, television conference terminal unit, and multi-location television conference system.
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Kannes Deno (2000 Broadway ; Suite 119 San Francisco CA 94115), Video conferencing system for courtroom and other applications.
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Kohda Youji (Kawasaki JPX), Video teleconferencing system.
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Stark, John G.; Dempster, Shawn B., Communication system for an instrumented orthopedic restraining device and method therefor.
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Martinson, James B.; Stark, John G.; Hanson, Timothy J. B.; Backes, Steven, Instrumented implantable stents, vascular grafts and other medical devices.
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Westin, Patrik, Key frame distribution in video conferencing.
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Chen, Feng-Wei; Chen, Ying; Lin, Dinah H.; Sivakumar, Latha, Managing participation in a teleconference by monitoring for use of an unrelated term used by a participant.
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Shah, Krutarth M.; Kalipatnapu, Rajah K. V. R., Method and system for identifying a multipoint control unit for hosting a conference.
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Henrikson, Eric Harold, Mixing video signals for an audio and video multimedia conference call.
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Iizawa Junichi,JPX, Multi-point video conference system.
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Kalipatnapu, Rajah K V R; Velliyatt, Rajesh; Shah, Krutarth M.; Atmakuri, Murthy V.; Tran, Khoa T., Optimizing bandwidth in a multipoint video conference.
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Kalipatnapu, Rajah K. V. R.; Velliyatt, Rajesh; Shah, Krutarth M.; Atmakuri, Murthy V.; Tran, Khoa T., Optimizing bandwidth in a multipoint video conference.
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Shaffer, Shmuel; Beyda, William J., Reducing multipoint conferencing bandwidth.
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Stark,John G.; Oyen,Duane; Mowery,Blair P., Rehabilitative orthoses.
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Jia, Wei; Gu, Qunshan, Remote access encoding.
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Stark, John G.; Oyen, Duane P. M.; Bybee, Thomas; Lohmann, Arthur M.; Boyd, Joel L., Remote monitoring of a patient.
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Stark, John G.; Oyen, Duane P.; Bybee, Thomas; Lohmann, Arthur M.; Boyd, Joel L., Remote monitoring of a patient.
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Dunn, Kristin A.; Graham, Philip R.; Wales, Richard T., System and method for displaying users in a visual conference between locations.
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Lian, TiongHu; Dunn, Chris A.; Baldino, Brian J., System and method for exchanging information in a video conference environment.
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Shah, Krutarth; Graham, Philip R., System and method for optimizing maintenance of geographically distributed processing units.
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Shah, Krutarth; Graham, Philip R., System and method for optimizing maintenance of geographically distributed processing units.
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Firestone,Scott S.; Friedrich,Walter R.; Ismail,Nermin M.; Lantz,Keith A.; Sarkar,Shantanu; Surazski,Luke K.; Wu,Duanpei, System and method for providing video conferencing synchronization.
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Shah, Krutarth; Harrell, Randy K.; Erion, Kenneth W.; Kumar, Rajneesh, System and method for single action initiation of a video conference.
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Boneh, Rami Y.; Biby, Danny; Rotkovitch, Rivka, System and method of monitoring video and/or audio conferencing through a rapid-update web site.
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Biby, Danny; Rotkovitch, Rivka; Boneh, Rami Y., System and method of monitoring video and/or audio conferencing through a rapid-update website.
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Stark, John G.; Oyen, Duane; Hanson, Timothy J. B.; Tracey, Timothy; Backes, Steven; Manninen, Gary, System for medical protocol management.
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Holmer, Stefan; Lundin, Henrik Fahlberg; Westin, Patrik, System, method and apparatus for multipoint video transmission.
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Thakkar, Pulin; Singh, Noor-E-Gagan; Jain, Stuti; Bhattacharjee, Avronil, Techniques to manage media content for a multimedia conference event.
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Gu, Qunshan; Wu, Ronghua, Video encoding and decoding using un-equal error protection.
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Ellner, Lars Henrik, Video multicast engine.
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Ellner, Henrik, Video selector.
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[미국특허] Multipoint video conference system 원문보기

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이 특허에 인용된 특허 (7) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (43) 인용/피인용 타임라인 분석

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