H - Electricity – 04 – R
Patent
H - Electricity
04
R
363/3, 179/6
H04R 5/04 (2006.01) H04N 5/60 (2006.01) H04H 5/00 (2006.01)
Patent
CA 1192138
ABSTRACT OF THE DISCLOSURE Apparatus for demodulating a multiplexed sound signal comprised of a first sound signal formed by the sum of a left channel signal and a right channel signal in a first language, a second sound signal formed by the difference of the left channel signal and the right channel signal, and a third sound signal in a second language, comprising a single demodulation circuit for producing either the second sound signal or third sound signal in response to the multiplexed sound signal; a selector switch for selectively changing the center frequency of the demodulation circuit to control the latter to produce either the second sound signal or third sound signal in response to the multiplexed sound signal; a matrix circuit for producing a stereo sound signal in response to the first and second sound signals; a pair of output terminals; and a switch device for supplying the third sound signal as a second language monaural sound signal from the demodulation circuit to one output terminal when the selector switch controls the demodulation circuit to produce the third sound signal and for supplying the stereo sound signal to both output terminals from the matrix circuit as a first-language stereo signal when the selector switch controls the demodulation circuit to produce the second sound signal.
420978
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
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