Method and apparatus for continuously receiving images from a plurality of video channels and for alternately continuously transmitting to each of a plurality of participants in a video conference individual images containing information concerning each of said video channels
First Claim
Patent Images
1. A method for receiving and transmitting video data across a network comprising the steps of:
- (a) Receiving a call initialization signal further comprising a codec identifying signal that corresponds to a codec format, in a network interface from a first video source;
(b) Storing said codec identifying signal in a memory;
(c) Receiving a component video packet stream from said first video source;
(d) Disassembling said component video packet stream into a component video signal;
(e) Forming a composite video signal from said component video signal said composite video signal further comprising said codec format;
(f) Assembling said composite video signal into a composite video packet stream further comprising said codec format; and
, (g) Transmitting said composite video packet stream to said first video source.
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Abstract
A method and apparatus is provided for video conferencing. The method and apparatus continuously receive frames from a plurality of video channels and alternately continuously transmit to each of a plurality of participants in a video conference individual frames containing information concerning each of the video channels. The method and apparatus only transmits at any given instant new picture data for one of the participants in the video conference.
60 Citations
16 Claims
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1. A method for receiving and transmitting video data across a network comprising the steps of:
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(a) Receiving a call initialization signal further comprising a codec identifying signal that corresponds to a codec format, in a network interface from a first video source;
(b) Storing said codec identifying signal in a memory;
(c) Receiving a component video packet stream from said first video source;
(d) Disassembling said component video packet stream into a component video signal;
(e) Forming a composite video signal from said component video signal said composite video signal further comprising said codec format;
(f) Assembling said composite video signal into a composite video packet stream further comprising said codec format; and
,(g) Transmitting said composite video packet stream to said first video source. - View Dependent Claims (2, 7, 8)
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3. An apparatus for receiving and transmitting video data across a network comprising:
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A. a video processing unit, said video processing unit further comprising;
1. a network interface for receiving a call initialization signal from a video source, said call initialization signal further comprising a codec format, receiving a component video packet stream from said video source and transmitting a composite video packet stream to said video source, 2. a memory further comprising a call set-up algorithm for identifying said codec format of said call initialization signal and storing said codec format in said memory, 3. a packet driver for disassembling said component video packet stream into a component video signal and for assembling a composite video signal into a composite video packet stream, and 4. a multi-point control unit for revising said component video signal into said composite video signal;
B. said packet driver coupled to said multi-point control unit, said memory and said network interface;
C. said multi-point control unit coupled to said memory. - View Dependent Claims (4, 5, 6, 9)
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10. A method for receiving and transmitting video data across a network comprising the steps of
(a) Receiving a video signal from a first video source, said signal further comprising a codec identifying signal that corresponds to a first codec format; -
(b) Receiving a second video signal from a second video source, said second signal further comprising a codec identifying signal that corresponds to a second codec format different from said first codec format;
(c) Forming a composite video signal from said first and second signals, said composite video signal further comprising said first codec format;
(d) Assembling said composite video signal into a composite video packet stream further comprising said first codec format; and
,(e) Transmitting said composite video packet stream to said first video source.
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11. A method for receiving and transmitting video data across a network comprising the steps of
(a) Receiving a call initialization signal in a network interface from a first video source; -
(b) Receiving a call initialization signal in said network interface from a second video source;
(c) Receiving a component packet stream from said first video source;
(d) Disassembling said component video packet stream into a component video signal;
(e) Forming a composite video signal from said component video signal, said composite video signal further comprising steady state data for said second video source;
(f) Assembling said composite video signal into a composite video packet; and
,(g) Transmitting said composite video packet stream to said second video source.
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12. An apparatus for receiving video data across a network comprising
(a) A display further comprising a screen displaying at least first and second images; -
(b) A network interface for receiving a composite video packet stream further comprising coded domain data to revise said first image and steady state data indicating that said second image is unchanged;
(c) A packet driver for disassembling said composite video packet stream into a composite video signal including said steady state data and said coded domain data; and
,(d) A control unit to revise said first image in said display with said coded domain data and, based on said steady state data, to permit said second image to remain unchanged in said display.
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13. An apparatus for receiving video data across a network comprising
(a) A display further comprising a screen displaying at least first and second images; -
(b) A network interface for receiving a composite video packet stream further comprising coded domain data to revise said first image;
(c) A packet driver for disassembling said composite video packet stream into a composite video signal including said coded domain data; and
,(d) A control unit to receive said composite video signal and revise only said first image in said display with said coded domain data.
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14. An apparatus for receiving and transmitting video data across a network comprising a video processing unit, said video processing unit further comprising:
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A. a network interface for (1) receiving a call initialization signal from a video source, said call initialization signal further comprising a codec format, (2) receiving a component video packet stream from said video source, (3) receiving a call initialization signal from a second video source, said call initialization signal further comprising a second codec format, and (4) transmitting a composite video packet stream;
B. a packet driver coupled to said network interface for disassembling said component video packet stream into a component video signal and for assembling said composite video signal into a composite video packet stream;
C. a memory coupled to said packet driver and further comprising a call set-up algorithm for identifying the codec formats of said call initialization signals and storing said codec formats in said memory; and
,D. a multi-point control unit coupled to said packet driver and said memory for revising said component video signal into said composite video signal further comprising steady state data for said second video source. - View Dependent Claims (15, 16)
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Specification