Digital conferencing apparatus

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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340347DD, 179 1CN, H04M 300

Patent

active

042152470

ABSTRACT:
Apparatus is illustrated for converting nonlinear or compressed digital information representative of an analog signal from a plurality of sources into a single composite digital signal. As specifically used and illustrated, a plurality of digital voice signals are summed to produce a new digital nonlinear signal representative of a combination of original voice signals for transmittal to each of the conferees in a conference call. This is accomplished without reverting to analog signals during the combination process.

REFERENCES:
patent: 3743790 (1973-07-01), Hilsley
patent: 3949299 (1976-04-01), Song
patent: 3971891 (1976-07-01), Wolcott
patent: 4128832 (1978-12-01), Betts

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