AM Stereo Broadcasting system

Details AM Stereo Broadcasting system AM Stereo Broadcasting system

1982-05-11

1984-07-03

Hickey, R. J.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 16, H04H 500

Patent

active

044583613

ABSTRACT:
An AM stereo broadcasting system for transmitting stereo signals in the AM broadcasting band. The system is based on amplitude modulation by two carriers having the same frequency and a 90.degree. phase difference from each other, and is capable of increasing the modulation depth of pilot signals (used for stereo signal identification) irrespective of the stereo signals, so that the pilot signals can be easily detected. By modulating both the sum and difference signals by the pilot signal, the receiver portion of the present system can derive the pilot signal irrespective of the stereo signals, thereby obviating many of the previous AM stereo broadcasting system problems.

REFERENCES:
patent: 4194088 (1980-03-01), Streeter
patent: 4332978 (1982-01-01), Streeter

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