Parametric signal processing systems and methods
AssigneeTurtle Beach Corporation
InventorElwood G. Norris
Life of this patent
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Abstract
A signal processing system for generating a parametric signal comprises an audio compressor, operable to compress a dynamic range of an audio input signal, and an equalization network, operable to equalize the audio signal. A low pass filter is operable to remove high portions of the audio signal and a high pass filter is operable to remove low portions of the audio signal. An oscillator circuit is operable to generate a carrier signal, and a modulation circuit is operable to combine the audio signal with the carrier signal to produce at least one modulated carrier signal.
Claims11
A method for generating a modulated carrier signal that can be emitted as a parametric wave, comprising:
- compressing a dynamic range of an audio signal to generate a compressed audio signal;
- equalizing the audio signal to generate an equalized audio signal;
- band pass filtering the audio signal to generate a filtered audio signal;
- and modulating a carrier signal with the compressed audio signal to generate a single sideband (“SSB”) modulated carrier signal;
- the single sideband (“SSB”) modulated carrier signal being of sufficient intensity so as to demodulate when emitted into a non-linear medium;
- wherein modulating the carrier signal includes utilizing a single oscillator circuit to drive at least a pair of modulators, each of which modulates a carrier signal with a filtered audio signal.
A method for generating a parametric sound, comprising:
- i) processing at least two audio input signals with at least two signal processing systems, each processing system comprising an audio processor, operable to compress a dynamic range of an audio input signal;
- an equalization network;
- a low pass filter, operable to remove high portions of the audio signal;
- a high pass filter, operable to remove low portions of the audio signal;
- an oscillator circuit, operable to generate a carrier signal;
- and a modulation circuit, operable to combine the audio signal with the carrier signal to produce at least one single sideband (“SSB”) modulated carrier signal;
- ii) providing the at least one single sideband (“SSB”) modulated carrier signal to an emitter assembly;
- and
- iii) emitting the modulated carrier signal from the emitter assembly into a non-linear medium, the modulated carrier signal being of sufficient intensity to demodulate in the non-linear medium;
- wherein modulating each audio signal includes utilizing a single oscillator circuit to drive at least a pair of modulators each of which modulates a carrier signal with a filtered audio signal.
Dependencies are inferred from the claim text.