Participant-identification recording and playback system

Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission

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455 2, 455 67, 381 42, 360 13, 369 7, 34087011, H04B 100, H04B 700

Patent

active

045960410

ABSTRACT:
A participant-identification, recording and playback system includes a plurality of radio transmitters, preferably FM transmitters, which are tuned to respectively different center frequencies, and serve as respective wireless microphones assigned to respective participants. A radio receiver which is operatively associated with a recording and playback system is provided to receive signals from all of the wireless microphones, reduce these to a plurality of IF signal and record the same. The playback portion of the system includes a plurality of demodulators which allows one to recover all the audio signals on a selective basis for transcription. Circuitry is provided to identify the speakers and to indicate start and stop times.

REFERENCES:
patent: 2668283 (1954-02-01), Mullin
patent: 2904682 (1959-09-01), Rawlins
patent: 3058065 (1962-10-01), Freeman et al.
patent: 3122847 (1964-03-01), Redfield et al.
patent: 3587077 (1971-06-01), Kaldor et al.
patent: 3673331 (1972-06-01), Hair et al.
patent: 3879751 (1975-04-01), Gimelli
patent: 4109104 (1978-08-01), Toyoshima
patent: 4345334 (1982-08-01), Nordahl

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