Asymmetrical sideband AM stereo transmission

Details Asymmetrical sideband AM stereo transmission Asymmetrical sideband AM stereo transmission

1987-11-05

1989-07-18

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

H04H 500

Patent

active

048500208

ABSTRACT:
Asymmetrical sideband amplitude modulation (AM) stereo transmission apparatus which transmits left (L) plus right (R) stereo information (L+R) in one stereo channel and a signal including L-R stereo information in a second stereo channel. Benefits include significant reduction of modulation envelope distortion in null regions of the transmitter's antenna radiation pattern and improved quality of reception in the presence of adjacent channel and co-channel interference, easing of the difficulty in tuning continuously tuned receivers and improvement of the fidelity of such receivers when side tuned, while at the same time providing a signal which, when received and decoded by an independent sideband AM stereo receiver, provides pleasing stereo effects.

REFERENCES:
patent: 4356349 (1982-10-01), Robinson
patent: 4503554 (1985-03-01), Davis
patent: 4569073 (1986-02-01), Kahn
patent: 4589127 (1986-05-01), Loughlin
patent: 4679238 (1987-07-01), Markovic et al.

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