4-Channel stereophonic demodulating system

Details 4-Channel stereophonic demodulating system 4-Channel stereophonic demodulating system

1974-10-24

1976-10-12

Olms, Douglas W.

1791004ST, 1791001TD, H04H 500, H04R 500

Patent

active

039859649

ABSTRACT:
A 4-channel stereophonic demodulating system based on a switching mode, which comprises a plurality of switching means for demodulating a received 4-channel stereophonic composite signal under control by a first and a second switching signals obtained from a pilot signal, means to separately derive four stereophonically related signals at the respective output terminals of said switching means, and adding means to add plural output signals from at least one switching means to each other. The signal levels of the individual channel signal components are adjustable by said adding means relative to one another to enable separation adjustment, so that in each of the four stereophonically related signals which appear at respective output terminals of the system, cross-talk due to the other signals is reduced.

REFERENCES:
patent: 3211834 (1965-10-01), Okatani
patent: 3315038 (1967-04-01), Zwollo
patent: 3573382 (1971-04-01), Frit
patent: 3584154 (1971-06-01), McShan
patent: 3707603 (1972-12-01), Limberg
patent: 3708623 (1973-01-01), Dorren
patent: 3711652 (1973-01-01), Metro
patent: 3721766 (1973-03-01), Hibert
patent: 3732375 (1973-05-01), Kuribavashi
patent: 3883692 (1975-05-01), Tsurshima

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