A collaboration system that integrates separate real-time and asynchronous networks - the former for real-time audio and video, and the latter for control signals and textual, graphical and other data - in a manner which closely approximates the experience of face-to-face collaboration. These capabilities are achieved by exploiting a variety of hardware, software and networking technologies in a manner that preserves the quality and integrity of audio/video/data and other multimedia information, even after wide area transmission, and at a significantly reduced networking cost as compared to what would be required by presently known approaches. The system architecture is readily scalable to the largest enterprise network environments. It accommodates differing levels of collaborative capabilities available to individual users and permits high-quality audio and video capabilities to be readily superimposed onto existing personal computers and workstations (12) and their interconnecting LANs (10) and WANs (15). In the case of a plurality of geographically dispersed LANs (10) interconnected by a WAN (15), the demands made on the WAN are significantly reduced by employing multi-hopping techniques, including avoiding the unnecessary decompression of data at intermediate hops, as well as video mosaicing and cut-and-paste technology.

Multimedia collaboration system

A multimedia collaboration system that integrates separate real-time and asynchronous networks--the former for real-time audio and video, and the latter for control signals and textual, graphical and other data--in a manner that is interoperable across different computer and network operating system platforms and which closely approximates the experience of face-to-face collaboration, while liberating the participants from the limitations of time and distance. These capabilities are achieved by exploiting a variety of hardware, software and networking technologies in a manner that preserves the quality and integrity of audio/video/data and other multimedia information, even after wide area transmission, and at a significantly reduced networking cost as compared to what would be required by presently known approaches. The system architecture is readily scalable to the largest enterprise network environments. It accommodates differing levels of collaborative capabilities available to individual users and permits high-quality audio and video capabilities to be readily superimposed onto existing personal computers and workstations and their interconnecting LANs and WANs. In a particular preferred embodiment, a plurality of geographically dispersed multimedia LANs are interconnected by a WAN. The demands made on the WAN are significantly reduced by employing multi-hopping techniques, including dynamically avoiding the unnecessary decompression of data at intermediate hops, and exploiting video mosaicing, cut-and-paste and audio mixing technologies so that significantly fewer wide area transmission paths are required while maintaining the high quality of the transmitted audio/video.

Multimedia collaboration system arrangement for routing compressed AV signal through a participant site without decompressing the AV signal

A method of real-time communication between a plurality of users each with respective communication devices having associated displays, the method comprising the steps of providing each of the plurality of users with collaboration initiation software at their communication devices and allowing at least first and second users to connect to at least one communication network by logging in at their respective communication devices. Further, the method comprises maintaining service records for at least the first and second logged in users, the service records including user identification information and an associated location where each user is logged in no matter where they are located. A display of a user identifier for at least the second user on the display of at least a first user's communication device is caused, thereby allowing the user to select the displayed second user's identifier and retrieve necessary addressing information of the second user so that a connection between the first and second users can be established, thereby enabling real-time communication displayed on the display of the first and second users.

Method for real-time communication between plural users

System for teleconferencing in which collaboration types and participants by names or icons are selected by a participant of the teleconference

A video collaboration system and method utilizing at least one control communications link, and an unshielded twisted pair (UTP) wire network among a plurality of video sources and display devices, the UTP network defining a video signal path for transport of video signals. In the invention, the control communications link controls any of transmission, routing, multipoint conferencing, and end display of video signals as well as connection termination.

Video conferencing on existing UTP infrastructure

Provided is a method and apparatus for the decentralized control of respective video cameras at a plurality of subscriber stations. According to the invention, there is provided a telephone, video camera, input device and camera control module at each subscriber station. The camera control module includes the input device and has a communication section for providing intelligence to the system, a control section for controlling respective video cameras, and a user feed-back section to identify a respective camera, its station and a camera function being controlled.

Decentralized video telecommunication system

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Decentralized video telecommunication system