Multiplex communications – Wide area network – Packet switching
Patent
1994-03-08
1996-03-05
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
4551541, 4551584, 4551861, H04J 114
Patent
active
054973724
ABSTRACT:
An FM multiplex broadcasting and receiving system has an FM multiplex broadcast apparatus and an FM multiplex receiving apparatus. The FM multiplex broadcast apparatus has a reproducing device for reproducing, from a recording medium, an audio signal and character data associated with the audio signal recorded in the recording medium. The FM multiplex broadcast apparatus also includes a multiplex device and a frequency modulation device. The multiplex device multiplexes the audio signal with additional information such as the character data to generate a multiplex signal. The frequency modulation device frequency modulates a carrier with the multiplex signal to provide an FM multiplex broadcasting signal. The FM multiplexing receiving apparatus has a frequency demodulating device for frequency demodulating the FM multiplex broadcast signal to provide an audio signal and an additional information data signal, a displaying device displaying the additional information data signal.
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patent: 5134719 (1992-07-01), Mankovitz
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patent: 5278826 (1994-01-01), Murphy et al.
Inoue Akio
Kawabata Tohru
Nankoh Mitsuo
Tomida Yosikazu
Yokomizo Hitoshi
Nguyen Chau T.
Olms Douglas W.
Sanyo Electric Co,. Ltd.
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