Multiplex communications – Special services – Conferencing
Patent
1996-11-18
1998-06-30
Pham, Chi H.
Multiplex communications
Special services
Conferencing
348 15, 379202, H04N 715
Patent
active
057744572
ABSTRACT:
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 video and speech signals from a selected multiplexed signal. A detecting section detects a talk request signal. A first selection instructing section instructs a first selector to select one multiplexed signal on the basis of a detected talk request signal. A second selection instructing section instructs an image selector to select the video signal from the talker demultiplexer upon detection of no talk request signal, and instructs the image selector to select the video signal from the chairman demultiplexer upon detection of no talk request signal. A multi-address calling multiplexer multiplexes the video signal from the image selector and the speech signal from a speech adder. A distribution unit transmits a signal based on the signal from the chairman CODEC to the entrant CODEC as the talk request source and transmits the multiplexed signal from the multi-address calling multiplexer to the remaining entrant CODECs upon detection of a talk request signal, and transmits the multiplexed signal from the multi-address calling multiplexer to all the entrant CODECs upon detection of no talk request signal.
REFERENCES:
patent: 5444477 (1995-08-01), Yamadera et al.
patent: 5446491 (1995-08-01), Shibata et al.
patent: 5548591 (1996-08-01), Horikoshi
patent: 5604738 (1997-02-01), Shibata et al.
patent: 5638114 (1997-06-01), Hatanaka et al.
patent: 5684527 (1997-11-01), Terui et al.
patent: 5689641 (1997-11-01), Ludwig et al.
patent: 6575374 (1997-10-01), Kohda
NEC Corporation
Ngu Ricky Q.
Pham Chi H.
LandOfFree
Multi-point video conference control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-point video conference control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-point video conference control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1867717