WO1995010917A1 - Multimedia enabled network - Google Patents

Multimedia enabled network

Info

Publication number
WO1995010917A1
WO1995010917A1 PCT/AU1994/000627 AU9400627W WO1995010917A1 WO 1995010917 A1 WO1995010917 A1 WO 1995010917A1 AU 9400627 W AU9400627 W AU 9400627W WO 1995010917 A1 WO1995010917 A1 WO 1995010917A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
video
network
audio
invention
present
Prior art date
Application number
PCT/AU1994/000627
Other languages
French (fr)
Inventor
Rudie Joseph Hoess
Original Assignee
Megavision International Pty. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/02Communication control; Communication processing contains provisionally no documents
    • H04L29/06Communication control; Communication processing contains provisionally no documents characterised by a protocol
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/40Services or applications
    • H04L65/403Arrangements for multiparty communication, e.g. conference
    • H04L65/4053Arrangements for multiparty communication, e.g. conference without floor control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/02Communication control; Communication processing contains provisionally no documents
    • H04L29/06Communication control; Communication processing contains provisionally no documents characterised by a protocol
    • H04L29/0602Protocols characterised by their application
    • H04L29/06027Protocols for multimedia communication

Abstract

A network which is suitable for the distribution of signals such as video and audio is disclosed. A second network (30) is overlaid on an existing LAN (20) to provide audio and video functionality, without further loading the capacity of the LAN. Switching of the video and audio signals is provided by a switchbox (31), controllable from the LAN via server (50). The second network may be a simple UTP arrangement.

Description

MULTIMEDIA ENABLED NETWORK Technical Field

This invention relates to the provision of multimedia capabilities with a communications network. Background Art

The current trend in communications and computer network systems is to provide a broad functionality within an integrated network, capable of handling some or all of voice, text, data, video, and still images. Such systems may also access external or shared resources, (e.g. image databases or video on demand), while allowing for video telephony and collaborative working within the office. Such systems typically use a LAN network within premises and ISDN or similar links to other sites.

Current LAN systems, regardless of topology, generally deliver much less useable bandwidth than is theoretically promised, due to system overheads, compression / decompression at terminals, and other factors. Installation of video capabilities for some or all terminals on an already near capacity LAN is likely to further degrade performance, particularly given the bursty nature and high bandwidth requirements for video. Further, installation of compression / decompression facilities onto terminals requires either very high performance, expensive hardware, or the acceptance of a loss of computation power for other tasks. It is network performance which in current LAN arrangements will provide the ultimate limitation on effective performance.

US patent No. 5170252 to Gear et al discloses a device for enabling the selective connection of video and audio signals to multiple terminals on a local network. The arrangement disclosed uses a specialised pipeline within the device to carry signals.

It is an object of the present invention to provide an improved arrangement allowing for existing LAN-based systems to cope with video and similar signals, without the need for customised hardware or cabling . Summary of Invention

According to one aspect the present invention comprises a system providing selective distribution within a network of video and/or audio data, control signals for said video and/or audio data, and further data, characterised in that the further data and control signals are carried on a first digital network, and the video and/or audio data is transmitted over a second, physically distinct cable network, said second network being responsive to said control signals via switching nodes communicating with both networks .

Preferably, the video and/or audio signals are carried in analog format. Preferably, the second network may comprises a series of unshielded twisted pair (UTP) connections, or an optical fibre connection. Preferably, at least some of the terminals within said system are operatively connected to both the first and second networks.

According to the present invention, it has been determined that video and audio, or so-called multi-media capacity, can be provided without degrading LAN performance and without requiring purpose built cabling. The present invention uses an overlapping but physically distinct network to provide video and audio capacity, with the existing LAN left to carry digital data. The second network can be simply formed by UTP cabling of the type used for telephone connections, yet allow for fast, high quality video conferencing and video telephony. Indeed, in many office situations, four pairs of UTP are cabled, of which only two are required for the phone system. The other two can be used to implement the present invention. Control remains with the digital system, which via switching nodes and control of the peripheral devices and program sources retains control of the overall system, so as to allow for coordination and synchronisation of media. Brief Description of Drawings An illustrative embodiment of the present invention will now be described with reference to the accompanying figures, in which:

Figure 1 illustrates the overall arrangement according to a first embodiment of the present invention;

Figure 2 illustrates a schematic site arrangement in more detail; Figure 3 illustrates schematically a terminal arrangement suitable for use with the present invention;

Figure 4 illustrates schematically a conference server suitable for use with the present invention; and

Figure 5 illustrates in overview a software system to facilitate operation of the illustrated embodiment. Description Figure 1 illustrates schematically the operation of a preferred embodiment of the present invention. As can be seen, two networks are overlayed: a LAN 20 (bold lines) and a set of UTP 30 connections (faint lines). The various screen terminals 40 to 45 are connected to both networks. Conference server devices 50, 51 control communications via ISDN link 46 to the other location 51 , 50. It will be appreciated that the UTP connections may be alternatively an optical fibre link, or any other suitable medium. The switching of the UTP network 30 is controlled via switching nodes 31, 32.

Of course, the ISDN connection may be replaced within the general concept of the present invention with other suitable external connections such as microwave links, or amateur TV (ATV) technologies. These may be used to connect various sites utilising the present invention , so as to expand the reach of the network and enable further and more complex services and functionality within the network. Such technologies may be particularly applicable to remote communities, and to applications such as distance education. The present invention enables relatively inexpensive switched inhouse audio and video, and so these applications are particularly suitable for the present invention.

Video and audio information is exchanged between parties over the UTP network: other data, and control information for the UTP network, is carried over the LAN. Leaving signals such as video and audio in analog format removes the requirement for significant numbers of elaborate D/A converters, and in the present configuration provides comparable or better quality than a system with analog to digital conversion taking place at each terminal.

The present invention does not have onerous requirements in terms of hardware for screen terminals. Each screen terminal may comprise a suitable PC platform, with adequate memory and a suitable versions of MS Windows or other comparable software. Preferably, in order to allow adequate definition, the screen used is of at least VGA standard. A 486 or equivalent IBM compatible computer, with a 180MB or larger hard disk and 8 MB of RAM provides a minimum platform. To provide interactive audio and video functionality, a facility such as Movie Machine PRO which includes a VGA to PAL converter, suitable speakers and microphone, and a video camera such as a Sony Hi-8 are required. Movie Machine is a video overlay board which enables the receive mode for audio and video to become part of the computer display within the MS Windows Graphics shell. Movie Machine enables video display at screen resolutions up to flicker-free 72Hz at 1024 x 768 high resolution, and is commercially available from Fast Electronics. If access to sound or image databases, or to RF channels is required, a suitable circuit cards and /or software will be required. All of theses components are readily available commercially.

Figure 3 illustrates schematically an illustrative arrangement for a terminal 46 connected to the LAN 20 and to the UTP network 30. data from terminal 46 is exchanges with the LAN 20. It is also connected, via Balun 67, to the UTP network 30, and ultimately to switch 31. Balun 67 includes transmitter 61 and receiver 62. The movie machine card 65 receives inputs from the balun, as well as from video camera and microphone 51, and potentially other inputs 63. It produces outputs to speakers 48, display 66, and other outputs 64. Figure 4 illustrates a conference server unit 50. Balun 67 is connected to the server hardware 70 as for each terminal 46, and thereby to the UTP network 30 and ultimately switch 60. However, it is also directly connected to switch 60 via a data line 22, for example an RS232 link. The server hardware 70 includes a communications board 71 , a codec 72, and audio processor 73. The communications board will of course be determined by the type of remote links, if any, which are provided. Illustratively, it may be an AVM ISDN board. Inputs to the codec may also include stored video such as from a VCR 54, or other sources 53. The codec may be, for example, a VistaCom Codec board.

Figure 2 shows the types of interactions and services possible using the inventive system. Terminals 46, 47 are connected to both the LAN 20, and the UTP network 30. Each has associated speakers 48, 49. For video telephony implementation, or security or monitoring purposes, video cameras 51 , 52 are connected to the UTP network. Server 50 is connected to the LAN, and provides control signals for the UTP network via switch 33. The connection to switch 33 may be, for example, via RS 232. Switch 33 ensures material is switched to the appropriate destinations, under control of the server 50, which in turn may be accessed via LAN-based commands.

Switch 33 may also have further inputs, such as form video disc player 53, VCR 54, and television tuner 55, which can also be accessed by terminals 46, 47.

When utilised as a video telephone or conferencing type system, the video component should allow for concurrent or user selected display of the communicating parties, fully connected for flicker-free high resolution display of live video frames at 350 lines in full 24 bit true colour. If the preferred Windows implementation is used, it is preferred that all video display windows can be freely moved and sized without impeding the functionality of the host PC, which is free to work on applications providing supportive information to assist the communication process. The ability of the LAN to fully support interactive services such as chalkboards and document manipulation is one of the key advantages of the present invention.

Preferably, the system allows for full capture and discussion of two concurrent images during communications. These video sources, as illustrated in figure 2, may be generated in-house, such as from video cameras 51, 52, from stored material such as VCR 54 or video disc player 53, or from a converted outside source, such as via TV tuner 55. Images received can preferably be captured to disk or memory for subsequent use in PC based applications with compatible file extensions. Full JPEG compression may be used for captured video images. Commercially available software packages may be used to perform this function.

The UTP switch 33 is preferably a Megavision passive matrix switch, available from the applicants. Any suitable controllable UTP switch could be used. The preferred device can be easily extended by multiple cascading units of similar configuration achieving multiples of 48 connections of audio and video per unit. It has an on board processor and is controlled by software to determine multiple switching configurations via user determined look-up tables. Suitable icons on the user screen allow the desired selection possibilities. Within the UTP network, preferably all physical connections are via industry standard RJ45 connectors using standard UTP cabling, where possible as part of an already existing Building Distribution System.

The present invention is preferably implemented on standard AT&T UTP cabling system, and can carry full frame video with concurrent audio (mono or stereo) . A standard AT&T Balun is required between switches ( 31 , 32) and the source. That means that one Balun is required to carry audio/video from each source (send module) and one Balun is required at each receiving end (receive module). When send/receive nodes are specified, a pair of baluns are required, one for the send device (e.g. camera and microphone) and one for the receive device (e.g. screen and speaker system).

Alternatively, if appropriate the signals may be converted to RF, by a commercially available converter, so as to allow for several channels to be carried simultaneously on the cable. Preferably, low channels are selected, for example channel 0. In this case, generally the conversion would take place before the signal passed through the balun, and the receiving device would be equipped to receive and display RF format programming.

Figure 5 illustrates the general arrangement of the software system according to an embodiment of the present invention. The preferred implementation has a client-server architecture. It will be appreciated that the precise details of interactions and protocols will be dependant upon the type of hardware components and LAN which are chosen. It is emphasised that the present invention provides a general principle of network arrangement, which can be implemented in many different ways, using commercially available components. User interface agent 80 is resident on each connected user terminal to provide a user interface for access to services including the UTP network. Conference control module 81 controls the establishment, progress and termination of conferences. Communications control 84 prepares compressed video, and connects outside links. Switch control 82 controls the UTP switchbox 85. Finally, video splitter 83 provides a hardware facility for combining individual video streams into a composite image, under software control . Software to perform these functions is generally available commercially, and any necessary additional software can be provided by the skilled network engineer relatively easily. It will be appreciated that the present invention may be implemented so as to operate on various different LAN systems, and to connect to different LANs via the PSTN or other connections. The present invention is independent of the particular LAN system utilised, and the necessary interface components are largely available as off the shelf items, as would be apparent to those skilled in the art.

The present invention allows for the use of an extensive user interface, which while not essential tho the invention, magnifies its benefits. Preferably, such a user interface is based on MS/Windows and should cater for comprehensive functions related to image display, data capturing, communications variables, auto clock, data transmissions, image capturing and interactive application software available during active communications.

The present invention is also suitable for audio and video distribution. Audio - mono, stereo or left and right track separation (for bilingual sources) sound may be supported, and distributed to each node synchronised to video. Sound can be connected to existing audio systems or can be delivered via additional speaker sets or handsets. Audio should be switched together with video at all times to ensure correct sound with selected video source.

The communications link 46 preferably provides full H.621 Codec capability, and complies with necessary CCITT recommendations ( H.221, H.261 and H.242 ) for video conferencing. It preferably will handle both NTSC and PAL format material.

Thus, if implemented using the above principles, the present invention will work independent of geography or source format (PAL or NTSC). The video display will detect and display a PAL or NTSC originated image. Preferably, video encoding and decoding are performed in full duplex, supporting simultaneous encoding of transmitted and received signals, regardless of video standards, PAL and NTSC at nominal frame rates of 25 Hz and 30 Hz respectively. Video display is equally conforming to these frame rates, but is decoded to display on high resolution PC monitors at 640 x 480 or 800 x 600 resolutions for up to 38 kHz horizontal display frequency. This guarantees absolutely sharp and flicker-free images for subsequent usage as video data where desired.

Both an audio input multiplexer and an audio amplifier are provided in a preferred implementation, allowing for telephone handset or microphone (line input) under software control. Audio attenuation and echo suppressor are preferably provided to compensate for various output devices (loudspeakers, external amplifier) and possible audio circulation (Echo) between input and output.

It will be appreciated that the video enabled terminal described and conference server may be assembled from readily available hardware and software components - any suitable configuration may be used. Although the foregoing discussion of an illustrative embodiment of the present invention has proceeded on the basis of discussion principally of a UTP network for audio/video, the reader will appreciate that other technologies may be used for this network if desired or required in a particular environment, for example optical fibre connections. It will be understood that the implementation described is purely illustrative, and is not limitative of the general inventive concept. It will be appreciated that variations and additions are possible within the general inventive concept.

Claims

Claims
1. A system providing selective distribution within a network of video and/or audio data, control signals for said video and/or audio data, and further data, characterised in that the further data and control signals are carried on a first digital network, and the video and/or audio data is transmitted over a second, physically distinct cable network, said second network being responsive to said control signals via switching nodes communicating with both networks .
2. A system according to claim 1 , wherein the video and/or audio signals are carried in analog format.
3. A system according to claim 2, wherein said second network comprises a series of unshielded twisted pair (UTP) connections.
4. A system according to claim 1, wherein at least some of the terminals within said system are operatively connected to both the first and second networks.
5. A system according to any one of the preceding claims, wherein at least one switching means is provided within said second network, such that said switching means responds directly or indirectly to control signals sent over said first network.
PCT/AU1994/000627 1993-10-14 1994-10-14 Multimedia enabled network WO1995010917A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AUPM182793 1993-10-14
AUPM1827 1993-10-14

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE1994630202 DE69430202T2 (en) 1993-10-14 1994-10-14 Multimedia-capable network
RU96108917A RU2127960C1 (en) 1993-10-14 1994-10-14 Network which provides multiple heterogeneous information transmission tools
US08632481 US5956076A (en) 1993-10-14 1994-10-14 Multimedia enabled network
DE1994630202 DE69430202D1 (en) 1993-10-14 1994-10-14 Multimedia-capable network
CA 2174214 CA2174214C (en) 1993-10-14 1994-10-14 Multimedia enabled network
EP19940930127 EP0723730B1 (en) 1993-10-14 1994-10-14 Multimedia enabled network
JP51108895A JPH09505448A (en) 1993-10-14 1994-10-14 Network of multi-media is possible

Publications (1)

Publication Number Publication Date
WO1995010917A1 true true WO1995010917A1 (en) 1995-04-20

Family

ID=3777275

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1994/000627 WO1995010917A1 (en) 1993-10-14 1994-10-14 Multimedia enabled network

Country Status (8)

Country Link
US (1) US5956076A (en)
EP (1) EP0723730B1 (en)
JP (2) JPH09505448A (en)
CN (1) CN1056025C (en)
CA (1) CA2174214C (en)
DE (2) DE69430202D1 (en)
RU (1) RU2127960C1 (en)
WO (1) WO1995010917A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0847178A2 (en) * 1996-12-06 1998-06-10 International Business Machines Corporation Multimedia conferencing using parallel networks
US7617515B1 (en) 2001-05-24 2009-11-10 Vixs Systems, Inc. Method and apparatus for managing resources in a multimedia system
US8170004B2 (en) 2005-08-08 2012-05-01 Genesis Technical Systems Corp. Shared DSL network and deployment method
US8666057B2 (en) 2007-10-04 2014-03-04 Genesis Technical Systems Corp. Remote powering of DSL ADMs
US9197435B2 (en) 2001-05-24 2015-11-24 Vixs Systems, Inc Channel selection in a multimedia system
US9420341B2 (en) 2001-05-24 2016-08-16 Vixs Systems, Inc. Method and streaming video server for use in a multimedia system

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119148A (en) * 1998-07-29 2000-09-12 Aten International Co., Ltd. Computer video signal distributor between a computer and a plurality of monitors
US6532218B1 (en) * 1999-04-05 2003-03-11 Siemens Information & Communication Networks, Inc. System and method for multimedia collaborative conferencing
US7020888B2 (en) * 2000-11-27 2006-03-28 Intellocity Usa, Inc. System and method for providing an omnimedia package
KR100444572B1 (en) * 2002-08-23 2004-08-16 삼성전자주식회사 Communication device having function of one-way speaker phone and controlling method thereof
CN100385430C (en) 2003-08-15 2008-04-30 夏志坚;夏潮涌 High-resolution-ratio video-frequency network control system
US7307651B2 (en) * 2003-10-16 2007-12-11 Mark A. Chew Two-way mobile video/audio/data interactive companion (MVIC) system
US7589760B2 (en) * 2005-11-23 2009-09-15 Microsoft Corporation Distributed presentations employing inputs from multiple video cameras located at multiple sites and customizable display screen configurations
JP5347489B2 (en) * 2008-12-24 2013-11-20 日本電気株式会社 Microwave communication systems and equipment

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2708625A1 (en) * 1977-02-28 1978-08-31 Siemens Ag Communications system with optical fibres electrical line wires - uses optical fibres for signal transmission and wire lines for current supply to subscribers
GB1586543A (en) * 1978-01-23 1981-03-18 Communications Patents Ltd Wired broadcasting systems
FR2558674A1 (en) * 1984-01-19 1985-07-26 Telecommunications Sa Video communication distribution network.
US4780758A (en) * 1987-04-30 1988-10-25 Gte Government Systems Corporation Telecommunication system with burst and continuous audio signals
US4792849A (en) * 1987-08-04 1988-12-20 Telaction Corporation Digital interactive communication system
EP0352210A2 (en) * 1988-07-22 1990-01-24 France Telecom Domestic reconfigurable multipoint cable network for simultaneous and/or alternative distribution of several types of signals, especially baseband picture signals, and method for reconfigurating such a network
EP0386635A2 (en) * 1989-03-08 1990-09-12 Siemens Aktiengesellschaft Device for distributing wide-band signals through a branched coaxial-cable network
EP0578573A1 (en) * 1992-07-07 1994-01-12 Alcatel Reseaux D'entreprise Method and arrangement for correcting the losses in a video signal transmitted over a wire pair line

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885747A (en) * 1988-02-17 1989-12-05 International Business Machines Corp. Broadband and baseband LAN
US4922486A (en) * 1988-03-31 1990-05-01 American Telephone And Telegraph Company User to network interface protocol for packet communications networks
US5040171A (en) * 1989-01-24 1991-08-13 Kabushiki Kaisha Toshiba Call restricting method in packet switching network and network controller having call restricting function
US5170252A (en) * 1990-04-09 1992-12-08 Interactive Media Technologies, Inc. System and method for interconnecting and mixing multiple audio and video data streams associated with multiple media devices
US5361091A (en) * 1990-09-28 1994-11-01 Inteletext Systems, Inc. Interactive home information system for distributing video picture information to television viewers over a fiber optic telephone system
US5572347A (en) * 1991-07-30 1996-11-05 Alcatel Network Systems, Inc. Switched video architecture for an optical fiber-to-the-curb telecommunications system
US5255267A (en) * 1992-03-09 1993-10-19 First Pacific Networks, Inc. Apparatus for combining broadband and baseband signal transmissions
US5183404A (en) * 1992-04-08 1993-02-02 Megahertz Corporation Systems for connection of physical/electrical media connectors to computer communications cards
US5283789A (en) * 1992-05-15 1994-02-01 Private Satellite Network, Inc. Communication system providing data and television signals to PC work stations
US5335011A (en) * 1993-01-12 1994-08-02 Bell Communications Research, Inc. Sound localization system for teleconferencing using self-steering microphone arrays
WO1994030017A1 (en) * 1993-06-03 1994-12-22 Target Technologies, Inc. Videoconferencing system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2708625A1 (en) * 1977-02-28 1978-08-31 Siemens Ag Communications system with optical fibres electrical line wires - uses optical fibres for signal transmission and wire lines for current supply to subscribers
GB1586543A (en) * 1978-01-23 1981-03-18 Communications Patents Ltd Wired broadcasting systems
FR2558674A1 (en) * 1984-01-19 1985-07-26 Telecommunications Sa Video communication distribution network.
US4780758A (en) * 1987-04-30 1988-10-25 Gte Government Systems Corporation Telecommunication system with burst and continuous audio signals
US4792849A (en) * 1987-08-04 1988-12-20 Telaction Corporation Digital interactive communication system
EP0352210A2 (en) * 1988-07-22 1990-01-24 France Telecom Domestic reconfigurable multipoint cable network for simultaneous and/or alternative distribution of several types of signals, especially baseband picture signals, and method for reconfigurating such a network
EP0386635A2 (en) * 1989-03-08 1990-09-12 Siemens Aktiengesellschaft Device for distributing wide-band signals through a branched coaxial-cable network
EP0578573A1 (en) * 1992-07-07 1994-01-12 Alcatel Reseaux D'entreprise Method and arrangement for correcting the losses in a video signal transmitted over a wire pair line

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0723730A4 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0847178A2 (en) * 1996-12-06 1998-06-10 International Business Machines Corporation Multimedia conferencing using parallel networks
US5916302A (en) * 1996-12-06 1999-06-29 International Business Machines Corporation Multimedia conferencing using parallel networks
EP0847178A3 (en) * 1996-12-06 1999-12-15 International Business Machines Corporation Multimedia conferencing using parallel networks
US9420341B2 (en) 2001-05-24 2016-08-16 Vixs Systems, Inc. Method and streaming video server for use in a multimedia system
US9609388B2 (en) 2001-05-24 2017-03-28 Vixs Systems, Inc. Method and set top box for use in a multimedia system
US9578375B2 (en) 2001-05-24 2017-02-21 Vixs Systems, Inc. Method and modem for use in a multimedia system
US9197435B2 (en) 2001-05-24 2015-11-24 Vixs Systems, Inc Channel selection in a multimedia system
US7617515B1 (en) 2001-05-24 2009-11-10 Vixs Systems, Inc. Method and apparatus for managing resources in a multimedia system
US9456248B2 (en) 2001-05-24 2016-09-27 Vixs Systems, Inc. Method and television for use in a multimedia system
US9467741B2 (en) 2001-05-24 2016-10-11 Vixs Systems, Inc. Method and computer for use in a multimedia system
US9485539B2 (en) 2001-05-24 2016-11-01 Vixs Systems, Inc. Method and client module for use in a multimedia system
US9832536B2 (en) 2001-05-24 2017-11-28 Vixs Systems, Inc. Method and set top box for use in a multimedia system
US8170004B2 (en) 2005-08-08 2012-05-01 Genesis Technical Systems Corp. Shared DSL network and deployment method
US8666057B2 (en) 2007-10-04 2014-03-04 Genesis Technical Systems Corp. Remote powering of DSL ADMs

Also Published As

Publication number Publication date Type
CA2174214C (en) 2004-06-22 grant
CN1056025C (en) 2000-08-30 grant
US5956076A (en) 1999-09-21 grant
JP2005192227A (en) 2005-07-14 application
CN1137336A (en) 1996-12-04 application
EP0723730A1 (en) 1996-07-31 application
EP0723730B1 (en) 2002-03-20 grant
CA2174214A1 (en) 1995-04-20 application
EP0723730A4 (en) 1999-04-07 application
JPH09505448A (en) 1997-05-27 application
DE69430202T2 (en) 2002-10-24 grant
DE69430202D1 (en) 2002-04-25 grant
RU2127960C1 (en) 1999-03-20 grant

Similar Documents

Publication Publication Date Title
US6522645B1 (en) Computer telephony integration system and operation method therein
US6972786B1 (en) Multimedia services using central office
US6081291A (en) Methods and systems for multimedia communication via public telephone networks
US6772436B1 (en) Interactive audio conferencing system
US6646677B2 (en) Image sensing control method and apparatus, image transmission control method, apparatus, and system, and storage means storing program that implements the method
US6128033A (en) Audiovisual communications terminal apparatus for teleconferencing and method
US6904451B1 (en) Wireless networked presentation system
US5509009A (en) Video and aural communications system
US5793415A (en) Videoconferencing and multimedia system
US5774527A (en) Integrated telephone and cable communication networks
US6404811B1 (en) Interactive multimedia system
US5313297A (en) System for providing pictures responding to users' remote control
US6215515B1 (en) Videocommunicating device with an on-screen telephone keypad user-interface method and arrangement
US20100225736A1 (en) Virtual Distributed Multipoint Control Unit
US4893326A (en) Video-telephone communications system
US6163335A (en) Multiple-mode videoconferencing arrangement
US5917470A (en) Communication conference method and communication conference terminal
US5534914A (en) Videoconferencing system
US20040150748A1 (en) Systems and methods for providing and displaying picture-in-picture signals
US4995071A (en) Video conference installation
US5374952A (en) Videoconferencing system
US6356294B1 (en) Multi-point communication arrangement and method
US6414707B1 (en) Apparatus and method for incorporating virtual video conferencing environments
US20070009114A1 (en) Integrated videoconferencing system
US7404001B2 (en) Videophone and method for a video call

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE MW SD SZ AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2174214

Country of ref document: CA

ENP Entry into the national phase in:

Ref country code: CA

Ref document number: 2174214

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: 1994930127

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 275397

Country of ref document: NZ

WWE Wipo information: entry into national phase

Ref document number: 08632481

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 1994930127

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWG Wipo information: grant in national office

Ref document number: 1994930127

Country of ref document: EP