Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent
1989-07-28
1991-04-16
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Broadcast or multiplex stereo
H04H 500
Patent
active
050089390
ABSTRACT:
A receiver for receiving an amplitude modulated signal with upper and lower sidebands, comprising: an independent sideband decoder for providing demodulated upper and lower sideband audio signals, a combiner for differentially combining the upper and lower sideband audio signals to provide a noise signal, a quality detector apparatus for providing upper and lower quality signals representative of undesired noise in the upper and lower sideband audio signals respectively, and a selector responsive to the quality signals for processing the upper and lower sideband audio signals to provide an output audio signal with reduced noise. The quality detector includes a correlator for correlating the noise and audio signal in the associated sideband to provide the quality signals. In another aspect of the invention, the receiver also comprises a plurality of band-pass filters for selectively transmitting spectral components of the upper and lower sideband audio signals in contiguous frequency bands, a corresponding plurality of said combiners, and a summer for summing the output audio signals provided by said selectors. The quality detectors and the selectors are associated with a respective band pass filter.
REFERENCES:
patent: 3218393 (1965-11-01), Kahn
patent: 4018994 (1977-04-01), Kahn
patent: 4192970 (1980-03-01), Kahn
patent: 4206317 (1980-06-01), Kahn
patent: 4489431 (1984-12-01), Ecklund
patent: 4641341 (1987-02-01), Kahn
patent: 4653095 (1987-03-01), Kahn
patent: 4680795 (1987-07-01), Ecklund
Bose Amar G.
Short William R.
Bose Corporation
Isen Forester W.
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