Multiplex communications – Special services – Conferencing
Patent
1996-12-19
2000-05-30
Jung, Min
Multiplex communications
Special services
Conferencing
370266, 370458, H04M 356, H04J 302
Patent
active
060698780
ABSTRACT:
A time division multiplexing ("TDM") digital matrix intercom system for connecting intercom stations. The system includes a digital switching system receiving audio input communications signals from at least some of the intercom stations, and sending audio input communications signals to at least some of the intercom stations. The digital switching system includes a TDM system for broadcasting on a TDM bus multiple digital communications signals including such digital audio input signals. The TDM system includes one or more interfaces connecting intercom stations with the TDM bus. The system also includes a signal mixer which is capable of receiving from the TDM bus selected ones of the digital audio input signals, and creating and broadcasting on the TDM bus a custom mixed digital audio output communications signal which is a loudness weighted mix of such selected digital audio input signals which at least one of such selected signals optionally being given a larger weight corresponding to a louder volume than others of the selected signals. A custom mixed digital audio output signal thus may be routed to a selected one of the intercom stations as an audio output communications signal. Preferably the system includes an integrated circuit for producing custom output mix signals.
REFERENCES:
patent: 4188511 (1980-02-01), Smith et al.
patent: 4550400 (1985-10-01), Henderson, Jr. et al.
patent: 4716585 (1987-12-01), Tompkin et al.
patent: 5027347 (1991-06-01), Malkki
patent: 5309517 (1994-05-01), Barclay
patent: 5357511 (1994-10-01), DiNapoli et al.
patent: 5384776 (1995-01-01), Gulliford et al.
patent: 5406634 (1995-04-01), Anderson et al.
patent: 5483528 (1996-01-01), Christensen
Goldsmith, B.J., "Advanced Digital Voice Communications", Symposium Record, Broadcast Sessions, 18th International Television Symposium and Technical Exhibition--Montreux, Switzerland, 863-876, (Jun. 10-15, 1993).
"Digital Voice Communications, System Profile", Drake Intelligent Communications, 6 pages.
"PRHB671/1, PREV671/PDE3601--Flexible Routing Module (FRM) Technical Handbook", Issue 1.0 May 22, 1991 I.G. Dennis, Prism Sound Ltd., 41 pages.
Jung Min
Telex Communications, Inc.
LandOfFree
TDM digital matrix intercom system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with TDM digital matrix intercom system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TDM digital matrix intercom system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1916113