[특허]Full-duplex video communication system

[미국특허] Full-duplex video communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-015/20 G06F-015/42
출원번호	US-0450641 (1989-12-14)
발명자 / 주소	Tanenbaum Richard (New York NY)
출원인 / 주소	Options Unlimited Research Corp. (Princeton NJ 02)
인용정보	피인용 횟수 : 102 인용 특허 : 0

초록 ▼

Each terminal in a full-duplex communication system comprises a computer-controlled display screen such as a CRT, at least one input means such as a keyboard, a mouse or a light pen and bidirectional communication means through which the terminals are interconnected. Each communication means comprises a receiver for receiving display information received at the terminal from the remote terminal(s) and a transmitter for transmitting information to the remote terminal(s) where it is displayed. In accordance with the invention, each terminal also comprises control means which periodically read sits input means and communications means and uses the information contained therein to control the content of its display. Further, the control means at each terminal also provides to its transmitter instructions which are transmitted to the remote terminal to change the display at the remote terminal so that all the displays are the same. As a result of this arrangement, changes in the display that are made at the same time by the user at the local terminal and by the user at the remote terminal are entered on the display screens at both terminals at substantially the same time so far as is discernable by the users. As a result, not only can each user interact with the display but it is also possible for each user to interact with the other users through the display without having to wait for one user to complete his entry of information as in the prior art. As a result, truly interactive communication is possible through the display.

대표청구항 ▼

A communication system for creating substantially identical simultaneously interactive displays at a plurality of locations comprising: a first terminal at a first of said locations comprising a first interactive display means, a first local input means for input of information to be displayed by said first display means, a first communications buffer for receiving information from a communication line, and a first means for transmitting information to a second location via the communication line, a functionally similar second terminal at a second of said locations comprising a second interactive display means, a second local input means for input of information to be displayed by said second display means, a second communications buffer for receiving information from said communication line, and a second means for transmitting information to said first location via said communication line, means at said first terminal for continuously receiving display instructions from said first input means and said first communication buffer and for implementing such instructions on said first display means upon receipt thereof, said instructions specifying a change in the information to be displayed by said display means and a location of said change in the information displayed, means at said first terminal for communicating display instructions entered at said first input means to the communications buffer of the second terminal via the communication line, said instructions being communicated upon receipt from said first input means, said instructions specifying a change in the information to be displayed by the second display means and a location of said change in the information displayed, means at said second terminal for continuously receiving display instructions from said second input means and said second communication buffer and for implementing such instructions on said second display means upon receipt thereof, said instructions specifying a change in the information to be displayed by said display means and a location of said change in the information displayed, and means at said second terminal for communicating display instructions entered at said second input means to the communications buffer of the first terminal via the communication line, said instructions being communicated upon receipt from said second input means, said instructions specifying a change in the information to be displayed by the first display means and a location of said change in the information displayed, whereby the same display is generated and updated substantially simultaneously at each of said first and second terminals.

이 특허를 인용한 특허 (102) 인용/피인용 타임라인 분석

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[미국특허] Full-duplex video communication system 원문보기

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