Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1978-11-13
1980-07-29
Miller, Charles D.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
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
Greenberg Howard R.
Hamann H. Fredrick
Lutz Bruce C.
Miller Charles D.
Rockwell International Corporation
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