Error correction for ultrasonic audio systems
AssigneeTurtle Beach Corporation
InventorsBrian Alan Kappus, Elwood Grant Norris
Life of this patent
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Abstract
Systems and methods for removing or reducing distortion in an ultrasonic audio system can include receiving a first audio signal, wherein the first audio signal represents audio content to be reproduced using the ultrasonic audio system; calculating a first error function for the ultrasonic audio system, the first error function comprising an estimate of distortion introduced by reproduction of the audio content by the ultrasonic audio system; transforming the first audio signal into a first pre-conditioned audio signal by combining the first error function with the first audio signal; and modulating the transformed audio signal onto an ultrasonic carrier.
Claims29
A method for reducing distortion in an ultrasonic audio system, comprising:
- receiving a first audio signal, wherein the first audio signal represents audio content to be reproduced using the ultrasonic audio system;
- calculating a first error function for the ultrasonic audio system, the first error function comprising H(x1)2+x12, where x1 is the received first audio signal and H(x1) is a Hilbert transform;
- and
- transforming the first audio signal into a first pre-conditioned audio signal by combining an additive inverse of the first error function with the first audio signal.
A method for reducing distortion in an ultrasonic audio system, comprising:
- receiving a first audio signal, wherein the first audio signal represents audio content to be reproduced using the ultrasonic audio system;
- calculating a first error function for the ultrasonic audio system, the first error function comprising H(x1)2−x12, where x1 is the received first audio signal and H(x1) is a Hilbert transform;
- and
- transforming the first audio signal into a first pre-conditioned audio signal by combining the first error function with the first audio signal.
A system for reducing distortion in an ultrasonic audio system, comprising:
- a receiver that receives a first audio signal, wherein the received first audio signal represents audio content to be reproduced using the ultrasonic audio system;
- and
- a non-transitory computer-readable medium operatively coupled to a processor, and having instructions stored thereon that, when executed by the processor:
- calculates a first error function for the ultrasonic audio system, the first error function comprising H(x1)2+x12, where x1 is the received first audio signal and H(x1) is a Hilbert transform of the received first audio signal;
- and
- transforms the received first audio signal into a first pre-conditioned audio signal by combining an additive inverse of the first error function with the received first audio signal.
Dependencies are inferred from the claim text.