US5914940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipoint video conference controlling method and system capable of synchronizing video and audio packets
Assignee: NEC Corp
•
Filing: 1997-02-07
•
Granted: 1999-06-22
•
Expires: 2017-02-07
Abstract
Abstract In a multipoint video conference controlling system which is supplied with video packets and audio packets from conference terminals, multiplexes the video packets to produce a composite video packet, and mixes the audio packets to produce a mixed audio packet, a sequence number collating device collates the sequence numbers of the video packets and the audio packets to produce a coincidence signal when the sequence numbers of the video packets and the audio packets coincide with each other. Video and audio transmitting devices transmit synchronously the composite video packet and the mixed audio packet in response to the coincidence signal. The multipoint video conference controlling system may comprise video and audio sequence number processing devices which add one of sequence numbers to the composite packet and the mixed audio packet when the video packets and the audio packets have the sequence numbers. The multipoint video conference controlling system may comprise a sequence number producing and adding device which produces a sequence number in response to one of multiplexed video and audio packets from a video server and adds the sequence number to the composite video packet and the mixed audio packet.
Inventors
- 👤 Hideyuki Fukuoka
- 👤 Hiromi Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:27
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/14; H04N7/15; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/2368; H04N21/2365; H04N21/242; H04N21/25; H04N21/266; H04N21/2665; H04N21/40; H04N21/43; H04N21/4302; H04N21/4307; H04N21/43072; H04N21/434; H04N21/4341; H04N21/4347; H04N7/152
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
125 words
A multipoint video conference controlling method, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: collating said sequence numbers of said video packets and said audio packets to produce a coincidence signal when said sequence numbers of said video packets and said audio packets coincide with each other; and transmitting synchronously said composite video packet and said mixed audio packet in response to said coincidence signal.
Claim 2
Dependent Claim
125 words
A multipoint video conference controlling method, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: collating said sequence numbers of said video packets and said audio packets to produce a coincidence signal when said sequence numbers of said video packets and said audio packets coincide with each other; and transmitting synchronously said composite video packet and said mixed audio packet in response to said coincidence signal.
Claim 3
Dependent Claim
119 words
A multipoint video conference controlling method, which is supplied with video packets and audio packets from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from the plurality of video conference terminals with sequence numbers; and transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 4
Dependent Claim
119 words
A multipoint video conference controlling method, which is supplied with video packets and audio packets from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from the plurality of video conference terminals with sequence numbers; and transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 5
Dependent Claim
137 words
A multipoint video conference controlling method, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: collating said sequence numbers of said video packets and said audio packets from said video server to produce a coincidence signal when said sequence numbers of said video packets and said audio packets from said video server coincide with each other; and transmitting synchronously said composite video packet and said mixed audio packet in response to said coincidence signal.
Claim 6
Dependent Claim
137 words
A multipoint video conference controlling method, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: collating said sequence numbers of said video packets and said audio packets from said video server to produce a coincidence signal when said sequence numbers of said video packets and said audio packets from said video server coincide with each other; and transmitting synchronously said composite video packet and said mixed audio packet in response to said coincidence signal.
Claim 7
Dependent Claim
120 words
A multipoint video conference controlling method, which is supplied with video packets and audio packets from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from said video server with sequence numbers; and transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 8
Dependent Claim
120 words
A multipoint video conference controlling method, which is supplied with video packets and audio packets from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from said video server with sequence numbers; and transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 9
Dependent Claim
138 words
A multipoint video conference controlling method, which is supplied with video packets and audio packets from a plurality of video conference terminals, and with multiplexed video and audio packets each of which has said video packets and said audio packets from a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: producing sequence numbers in response to one of said multiplexed video and audio packets from said video server; adding said sequence numbers to said composite video packet and said mixed audio packet; and transmitting synchronously said composite video packet and said mixed audio packet having said sequence numbers.
Claim 10
Dependent Claim
138 words
A multipoint video conference controlling method, which is supplied with video packets and audio packets from a plurality of video conference terminals, and with multiplexed video and audio packets each of which has said video packets and said audio packets from a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling method comprising the steps of: producing sequence numbers in response to one of said multiplexed video and audio packets from said video server; adding said sequence numbers to said composite video packet and said mixed audio packet; and transmitting synchronously said composite video packet and said mixed audio packet having said sequence numbers.
Claim 11
Dependent Claim
136 words
A multipoint video conference controlling system, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmit said composite video packets and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: collating means for collating said sequence numbers of said video packets and said audio packets to produce a coincidence signal when said sequence numbers of said video packets and said audio packets coincide with each other; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet when said transmitting means is supplied with said coincidence signal from said collating means.
Claim 12
Dependent Claim
136 words
A multipoint video conference controlling system, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmit said composite video packets and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: collating means for collating said sequence numbers of said video packets and said audio packets to produce a coincidence signal when said sequence numbers of said video packets and said audio packets coincide with each other; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet when said transmitting means is supplied with said coincidence signal from said collating means.
Claim 13
Dependent Claim
122 words
A multipoint video conference controlling system, which is supplied with video packets and audio packets from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: adding means for adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from the plurality of video conference terminals with sequence numbers; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 14
Dependent Claim
122 words
A multipoint video conference controlling system, which is supplied with video packets and audio packets from a plurality of video conference terminals, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: adding means for adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from the plurality of video conference terminals with sequence numbers; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 15
Dependent Claim
148 words
A multipoint video conference controlling system, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: collating means for collating said sequence numbers of said video packets and said audio packets from said video server to produce a coincidence signal when said sequence numbers of said video packets and said audio packets from said video server coincide with each other; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet when said transmitting means is supplied with said coincidence signal from said collating means.
Claim 16
Dependent Claim
148 words
A multipoint video conference controlling system, which is supplied with video packets having sequence numbers and audio packets having sequence numbers from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: collating means for collating said sequence numbers of said video packets and said audio packets from said video server to produce a coincidence signal when said sequence numbers of said video packets and said audio packets from said video server coincide with each other; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet when said transmitting means is supplied with said coincidence signal from said collating means.
Claim 17
Dependent Claim
100 words
A multipoint video conference controlling system as claimed in claim 8, wherein said multipoint video conference controlling system further comprises: another collating means for collating said sequence numbers of said video packets and said audio packets from said video conference terminals to produce another coincidence signal when said sequence numbers of said video packets and said audio packets from said video conference terminals coincide with each other; and another transmitting means for transmitting synchronously said composite video packet and said mixed audio packet when the other transmitting means is supplied with the other coincidence signal from the other collating means.
Claim 18
Dependent Claim
123 words
A multipoint video conference controlling system, which is supplied with video packets and audio packets from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: adding means for adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from said video server with sequence numbers; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 19
Dependent Claim
123 words
A multipoint video conference controlling system, which is supplied with video packets and audio packets from a plurality of video conference terminals and a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: adding means for adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from said video server with sequence numbers; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet having said corresponding sequence numbers.
Claim 20
Dependent Claim
56 words
A multipoint video conference controlling system as claimed in claim 10, wherein said multipoint video conference controlling system further comprises another adding means for adding corresponding sequence numbers to said composite video packet and said mixed audio packet when said video packets and said audio packets are supplied from said video conference terminals with sequence numbers.
Claim 21
Dependent Claim
145 words
A multipoint video conference controlling system, which is supplied with video packets and audio packets from a plurality of video conference terminals, and with multiplexed video and audio packets each of which has said video packets and said audio packets fr om a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: producing means for producing sequence numbers in response to one of said multiplexed video and audio packets from said video server; adding means for adding said sequence numbers to said composite video packet and said mixed audio packet; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet having said sequence numbers.
Claim 22
Dependent Claim
145 words
A multipoint video conference controlling system, which is supplied with video packets and audio packets from a plurality of video conference terminals, and with multiplexed video and audio packets each of which has said video packets and said audio packets fr om a video server, multiplexes said video packets to produce a composite video packet, mixes said audio packets to produce a mixed audio packet, and transmits said composite video packet and said mixed audio packet to said video conference terminals, said multipoint video conference controlling system comprising: producing means for producing sequence numbers in response to one of said multiplexed video and audio packets from said video server; adding means for adding said sequence numbers to said composite video packet and said mixed audio packet; and transmitting means for transmitting synchronously said composite video packet and said mixed audio packet having said sequence numbers.
References Cited (Backward Citations)
US4360827A
Cited
US5257306A
Cited
US5440565A
Cited
JPH05130601A
Cited
US5375068A
Cited
US5546324A
Cited
US5608653A
Cited
JPH0750818A
Cited
US5384772A
Cited
US5627825A
Cited
EP0669764A1
Cited
US5657096A
Cited
US5764277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-06-21 | 2002-12-21 | 2003-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-21 | 2006-12-21 | 2007-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-21 | 2010-12-21 | 2011-06-22 | $7700.00 | Window Closed / Lapsed |