Multiplex communications – Special services – Conferencing
Patent
1996-04-02
1997-04-22
Marcelo, Melvin
Multiplex communications
Special services
Conferencing
370412, 370462, 364514A, H04L 1256
Patent
active
056234902
ABSTRACT:
The present invention is embodied in a digital communication system where multiple media data sources are time multiplexed into a packetized data stream, each packet having an assigned priority and the packetized data stream transmitted in substantially the order of assigned priority. At both the transmit side, and the receive side, audio packets are given priority processing over video packets, which in turn have priority over text/graphics data packets. Continuous real time audio playback is maintained at the receiver by delaying the playback of received audio in a first in/first out (FIFO) buffer providing a delay at least equal to the predicted average packet delay for the communication system. Optionally, the average system delay is continuously monitored, and the audio playback delay time is adjusted accordingly. Audio playback is slowed or accelerated in order to shrink or grow the difference in time between the sender and receiver. In another aspect of the invention, a conference of three or more callers is created by broadcasting a common packetized data stream to all conference callers.
REFERENCES:
patent: 4516156 (1985-05-01), Fabris et al.
patent: 4627052 (1986-12-01), Hoare et al.
patent: 4707831 (1987-11-01), Weir et al.
patent: 4763317 (1988-08-01), Lehman et al.
patent: 4847829 (1989-07-01), Tompkins et al.
patent: 4935953 (1990-06-01), Appel et al.
patent: 4942470 (1990-07-01), Nishitani et al.
patent: 4942569 (1990-07-01), Maeno
patent: 4945410 (1990-07-01), Walling
patent: 4949169 (1990-08-01), Lumelski et al.
patent: 4991169 (1991-02-01), Davis et al.
patent: 4995071 (1991-02-01), Weber et al.
patent: 5014267 (1991-05-01), Tompkins et al.
patent: 5083269 (1992-01-01), Syobatake et al.
patent: 5132966 (1992-07-01), Hayano et al.
patent: 5140584 (1992-08-01), Suzuki
patent: 5155594 (1992-10-01), Birnstein et al.
patent: 5177604 (1993-01-01), Martinez
patent: 5195086 (1993-03-01), Baumgartner et al.
patent: 5210836 (1993-05-01), Childers et al.
patent: 5220653 (1993-06-01), Miro
patent: 5231492 (1993-07-01), Dangi et al.
patent: 5243596 (1993-09-01), Port et al.
Reed, Jr. Ogden C.
Richter Andreas
Intelligence-at-Large
Marcelo Melvin
LandOfFree
Method and apparatus for multiple media digital communication sy does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for multiple media digital communication sy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for multiple media digital communication sy will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-346731