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5850250 |
Video distance learning system
A video distance learning system including a teaching classroom connected to remote learning classrooms by a fiber-optic communication network. The teaching classroom includes at least a rear...
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5844599 |
Voice-following video system
A voice-following video system for dynamically capturing the view of an active speaker includes a video camera, a position control system for the video camera, and one or more voice-activated...
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5844597 |
Method of transmitting signals between communications stations
Method of transmitting signals between communication stations via a network, in which a central control station is adapted to transmit a picture of a virtually real ambience to each connected...
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5844994 |
Automatic microphone calibration for video teleconferencing
A method of automatically calibrating a microphone having a microphone input gain comprises the steps of receiving an input signal generated by the microphone in response to an audio input,...
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5841763 |
Audio-video conferencing system
A processor unit for a multipoint audio-video conferencing system, wherein the processor unit includes a host processor for controlling operation of the audio-video conferencing system. Controlling...
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5838914 |
Collaboration system for allowing computer to draw annotation images on the output of selected program and replicating the annotation images on displays of other computers
The invention concerns using multiple computers to hold a conference. Under the invention, an application program can run on a single computer, yet remote participants can issue commands to the...
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5835140 |
Remote-control method and apparatus for rotating image device
A method of remotely controlling the direction of a camera which is rotatively supported by a remote control device. Several remote control devices are coupled by a communication line. The...
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5828838 |
Method and apparatus for conducting multi-point electronic conferences
A number of personal conferencing systems, each executing a personal conferencing application, are networked together in a peer-to-peer manner. Each personal conferencing application is provided...
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5825870 |
Methods and apparatus for implementing a network call center
A network call center hosted by a network service provider has equipment and software for providing call center services to customers of the network service provider. In a preferred embodiment...
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5821984 |
Communication conference system with storage of conference information including proceedings data
When a closing time for data transmission is reserved by a transmission source terminal, a multi-point control unit secures idle time periods of a destination terminal before the closing time, and...
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5821986 |
Method and apparatus for visual communications in a scalable network environment
A method and apparatus for providing a flexible and scalable videoconferencing system for use in connection with a network provides for scalably encoding an image sequence for transmission onto the...
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5822537 |
Multimedia networked system detecting congestion by monitoring buffers' threshold and compensating by reducing video transmittal rate then reducing audio playback rate
Disclosed is a networked multimedia information system which may be utilized to record, store and distribute multimedia presentations together with any supplemental materials that may be referenced...
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5819038 |
Collaboration system for producing copies of image generated by first program on first computer on other computers and annotating the image by second program
The invention concerns using multiple computers to hold a conference. Under the invention, an application program can run on a single computer, yet remote participants can issue commands to the...
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5818514 |
Video conferencing system and method for providing enhanced interactive communication
A system and method for enhancing interactive communication between video conferencing devices of the type in which a delay is inserted into the audio transmission path to provide lip...
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5819048 |
Image data processing apparatus transmitting data in accordance with a reception rate
Image data processing apparatus transmitting data in according with a reception rate includes a receiver for receiving information data transmitted from at least one external terminal, and...
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5812185 |
Multipoint video teleconferencing apparatus for processing and combining compressed image information
In a video teleconferencing system, line interfaces are connected to communication channels for receiving data-compressed integrated frame format signals from a video teleconferencing apparatus....
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5812125 |
Method and apparatus for selectively generating display images
An apparatus and method for selecting portions of a displayed image for remote display including displaying a first image, selecting a subset of the displayed first image, and communicating the...
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5809237 |
Registration of computer-based conferencing system
A conferencing server accepts a conferencing session call from a conferencing node over a communications link. The conferencing server receives product registration information from the...
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5802294 |
Teleconferencing system in which location video mosaic generator sends combined local participants images to second location video mosaic generator for displaying combined images
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...
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5802283 |
Method and system for accessing multimedia data over public switched telephone network
A public switched telephone network for providing information from a multimedia information server to any one of a plurality of subscriber premises, comprises a central office receiving multimedia...
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5802163 |
Methods and apparatus for implementing an outbound network call center
A system for incorporating a remote home agent in a call center is accomplished by the home agent dialing a telephony switch and the telephony switch terminating the home agent's incoming call to a...
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5796724 |
Method and apparatus for partitioning transmission bandwidth among different data streams
A communications system having a first data subsystem; a data transmission controller coupled to the first data subsystem; a data line coupled to the data transmission controller having a bandwidth...
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5794018 |
System and method for synchronizing data streams
Two sequences of signal packets are played. Each signal packet of a first type of signals has been stamped with a sequence number corresponding to the position of the signal packet in the first...
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5793415 |
Videoconferencing and multimedia system
A videoconferencing system is provided which comprises a personal computer having a 32-bit multi-tasking, native-networking operating system and a touch screen graphic user interface for...
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5790178 |
Picture codec for teleconference equipment, which forms and displays picture-in-frame including at least two of received motion picture, a received still picture and a self motion picture in an optional combination
In a teleconference terminal equipment; a picture codec for simultaneously displaying a still picture and video on a single screen. The picture codec includes an analog-to-digital converter which...
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5790174 |
PSTN architecture for video-on-demand services
A public switched telephone network (PSTN) provides digital video signals from a video information provider to one or more of a plurality of subscriber premises. A subscriber uses either a standard...
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5790177 |
Digital signal recording/reproduction apparatus and method
The present invention describes a new digital video tape recorder apparatus and method in which video channels are simultaneously recorded in a recording mode, and in which any of the recorded...
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5784099 |
Video camera and method for generating time varying video images in response to a capture signal
A method and video camera for generating time varying video images. A first capture signal is received from a video processing system by a video camera, which captures a first set of one or more...
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5781727 |
Collaborative system for allowing user to draw annotation images on the user display and replicating the annotation images on the displays of all other computers
The invention concerns using multiple computers to hold a conference. Under the invention, an application program can run on a single computer, yet remote participants can issue commands to the...
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5781174 |
Image synthesizer and image pointing system
A "city block" image subject to pointing is given as a first image V a . A "hand" image serving as a pointer pointing something out on the first image V a is given as a second image V b . A mixer...
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5778082 |
Method and apparatus for localization of an acoustic source
An acoustic signal processing method and system using a pair of spatially separated microphones to obtain the direction or location of speech or other acoustic signals from a common sound source is...
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5777664 |
Video communication system using a repeater to communicate to a plurality of terminals
A video communication system includes a terminal unit for transmitting/receiving an information signal including video information, and a repeater to which a plurality of terminal units identical...
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5774674 |
System for negotiating at least two sets of video capabilities between two nodes to perform video conferencing between the nodes according to the selected set
Nodes of a computer-based teleconferencing network may be able to encode and decode video signals using different video compression/decompression algorithms with different parameters. In order to...
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5774457 |
Multi-point video conference control apparatus
In a multi-point video conference control apparatus, a chairman demultiplexer separates video and speech signals from a multiplexed signal from a chairman CODEC. A talker demultiplexer separates...
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5771436 |
Satellite communications multi-point video transmit system
A satellite communications multi-point video transmit system is provided which employs a satellite link and a hybrid system of a terrestrial line and is economical. Further, a system configuration...
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5768517 |
Paperless publication distribution and retrieval system
A paperless system that allows data including publications to be networked and retrieved includes a plurality of remote stations for transmitting the data to users, a plurality of local stations...
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5767913 |
Mapping system for producing event identifying codes
A mapping system for producing event identifying codes includes a plurality of video-audio-data (VAD) marker channels representative of a method for coding and/or encoding signals such as video and...
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5767897 |
Video conferencing system
A video conferencing system wherein a director controller is adapted for disposition on a lecture podium. The controller includes an interconnected control section and a video display section for...
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5764279 |
Method and apparatus for instantaneous in-band document exchange during a video conference
A method and apparatus for "piggy backing" a FAX transmission on a video call. A document, in the form of modulated facsimile data, is received from a machine located in proximity of a sending...
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5764901 |
Record and playback in a data conference
A method, apparatus, and storage medium for processing data streams of a data conference between a local user of a data conferencing system and at least one remote user of the data conferencing...
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5760794 |
Method for storing video data in a plurality of video data buffers on a host
In an interface connecting a video camera to a host, a method and apparatus for storing video data received from a video camera in video data buffers in the host's memory. The method allows for a...
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5757424 |
High-resolution video conferencing system
A system enables high-resolution videoconferencing images to be transmitted, without extreme demands on bandwidth. A mosaicing camera sequentially samples a series of small portions of a general...
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5758079 |
Call control in video conferencing allowing acceptance and identification of participants in a new incoming call during an active teleconference
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...
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5757418 |
Television conference system and method therefor
An apparatus for displaying an image captured by a video camera displays a window of the captured image, buttons displayed about the window for scrolling the image, and a sizing button displayed...
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5754765 |
Automatic transport detection by attempting to establish communication session using list of possible transports and corresponding media dependent modules
The transports available in a local computer system for communicating with a remote computer system are automatically determined at either install time or run time. At install time, a list of...
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5754836 |
Split bus architecture for multipoint control unit
A split bus arrangement for increasing network interface bandwidth capacity in a multipoint control unit includes a bus clock circuit for passing clock signals from a first network bus to a second...
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5751338 |
Methods and systems for multimedia communications via public telephone networks
Methods and systems for providing multimedia telecommunication services to multimedia workstations communicating with a multimedia central office which includes a digital switch complex coupled to...
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5751700 |
Communication terminal apparatus
A communication terminal apparatus for multiplexing a plurality of different types of data and for performing communications using the multiplexed data includes a network control unit connected to...
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5751337 |
Teleconferencing method and system for providing face-to-face, non-animated teleconference environment
A method and system provides a face-to-face video conference utilizing a video mirror. The method and apparatus comprise a first station having a first predetermined sensory setting; a second...
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5751445 |
Image transmission system and terminal device
A clear print image is obtained from a moving image. A switch (66) for selectively supplying an output from a moving image input camera (60) or a still image input picture/image camera (64) to a...
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