FM Multiplex system for selectively delaying one of two audio signals
AssigneeSony Corporation
InventorsShigeo Tanaka, Keitaro Yamashita
Life of this patent
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Abstract
An FM multiplex audio system wherein either stereo signals or signals of two languages can be simultaneously transmitted and where switch means are provided so as to selectively delay either of the language signals so that the listener will hear a first language and then after a delay a second language. Means are also provided for muting either of the language signals if desired.
Claims7
A signal delaying apparatus for delaying one of two audio signals reproduced by a multiplex sound demodulating apparatus particularly one of said two audio signals being of one language, another audio signal being of another language corresponding to said one language, comprising a pair of input terminals to which said two audio signals are supplied respectively, means for delaying said one of two audio signals, a pair of output terminals to be connected to a pair of speakers, respectively, and at which said one of two audio signals and another audio signal is obtained.
An audio demodulating and delaying system for a pair of FM stereo signals or a pair of audio signals of different languages comprising, means for demodulating said pair of stereo and language signals, control means for detecting whether stereo or language signals are being received, a stereo matrix, first switching means connected to said control means and to said matrix receiving said pair of audio signals, and a delay means to which said pair of audio signals are applied for delaying one of said pair of audio signals relative to the other, including indicating means for indicating which of said audio signals is delayed relative to the other.
An audio demodulating and delaying system for a pair of stereo signals or a pair of audio signals of different languages comprising, means for demodulating a pair of audio signals control means for detecting whether stereo or language signals are being received, a stereo matrix receiving said pair of audio signals and generating said pair of stereo signals, first switching means having first pair of input terminals connected to said means for demodulating said pair of audio signals, second pair of input terminals supplied with said pair of stereo signals, and a pair of output terminals selectively connected to said first or second pair of input terminals by said control means, and delay means connected to one of said pair of output terminals for delaying one of audio signals obtained at said pair of output terminals of said first switching means relative to the other.
Dependencies are inferred from the claim text.