Multiplex communications – Wide area network – Packet switching
Patent
1979-02-02
1983-04-12
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 76, 370 11, 370 691, H04H 500, H04J 114
Patent
active
043799477
ABSTRACT:
An FM broadcasting system is disclosed for transmitting a data signal simultaneously with an auxiliary audio program on the same subcarriers of an FM transmission channel. The main program is transmitted on the FM transmission channel carrier and the auxiliary audio program, which may be background music, is transmitted on the subcarriers in a conventional manner. According to the present invention, the data signal, which is added to the auxiliary audio program, is a binary digital information signal. This binary digital information signal is used to generate a signal which modulates the phase and amplitude of a data reference signal. The resulting phase transition of the modulated data reference signal represents the binary value of the binary digital information signal. The amplitude of the modulated data reference signal then is adjusted in an automatic gain control amplifier relative to the amplitude of a corresponding frequency range of the auxiliary audio program. This amplitude adjusted signal is combined in a linear summing network with the auxiliary audio program and transmitted over the FM transmission channel. The receiver is capable of receiving one or more of the main program, the auxiliary audio program and the data signal.
REFERENCES:
patent: 2615986 (1952-10-01), Kalfaian
patent: 3122610 (1964-02-01), Csicsatka
patent: 3160812 (1964-12-01), Scantlin
patent: 3317838 (1967-05-01), Ham
patent: 3406343 (1968-10-01), Mehlman
patent: 3486117 (1969-12-01), Groves et al.
patent: 3603882 (1971-09-01), Wilson
patent: 3683277 (1972-08-01), Kuller et al.
patent: 3701946 (1972-10-01), Anderson
patent: 3706945 (1972-12-01), Yanagidaira et al.
patent: 3714375 (1973-01-01), Stover
patent: 3760274 (1973-09-01), Vogt
patent: 3773979 (1973-11-01), Kirk et al.
patent: 3778718 (1973-12-01), Bass et al.
patent: 3792199 (1974-02-01), Saeki
patent: 3824468 (1974-07-01), Zegers et al.
patent: 3824470 (1974-07-01), Eastmond
patent: 3842196 (1974-10-01), Loughlin
patent: 3845391 (1974-10-01), Crosby
patent: 3875512 (1975-04-01), Baranyi et al.
patent: 4024342 (1977-05-01), Croiser et al.
patent: 4048619 (1977-09-01), Forman
Olms Douglas W.
Teleprompter Corporation
LandOfFree
System for transmitting data simultaneously with audio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for transmitting data simultaneously with audio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for transmitting data simultaneously with audio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-939709