Electrical audio signal processing systems and devices – One-way audio signal program distribution
Reexamination Certificate
2006-06-13
2006-06-13
Pendleton, Brian (Department: 2644)
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Reexamination Certificate
active
07062050
ABSTRACT:
A method of processing an audio signal in a nonlinear acoustic system to reduce distortion in corresponding regenerated audio signals. A first nonlinear processing method includes producing a modeled representation of signal demodulation through a propagation medium, applying an inversion to the modeled representation of signal demodulation, and processing an audio signal using the inverted, modeled signal demodulation representation. A second nonlinear processing method includes applying an inversion to a signal demodulation function, producing a modeled representation of the inverted signal demodulation function, and processing an audio signal using the modeled representation of the inverted signal demodulation function. The processed audio signal is then modulated using an ultrasonic carrier signal, and projected through a propagation medium using an acoustic transducer.
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Improved efficiency in the parametric transmitting array, Harold M. Merklinger, J. Acoustical Society of America, vol. 53, No. 4, Oct. 1975, pp. 784-787.
Partametric Loudspeaker-Characteristics of Acoustic Field and Suitable Modulation of Carrier Ultrasound, Kenichi Aoki, et al., Electronics and Communications in Japan, Part 3, vol. 74, No. 9, 1991, pp. 76-82.
Pendleton Brian
Weingarten Schurgin, Gagnebin & Lebovici LLP
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