System for playback of pre-encoded signals through a parametric loudspeaker system
First Claim
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1. A method for generating parametric output from a parametric loudspeaker system, comprising the steps of:
- retrieving a pre-encoded audio signal from an electronically readable storage medium, wherein an ultrasonic carrier signal having at least one sideband represents the pre-encoded audio signal; and
playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter.
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Accused Products
Abstract
A method and system for generating parametric output directly from a prerecorded and error corrected parametric signal for playback in a parametric loudspeaker system. The method includes the step of retrieving a pre-encoded audio signal from an electronically readable storage medium. In addition, an ultrasonic carrier signal has at least one sideband which represents the pre-encoded audio signal. The next step is playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter.
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Citations
51 Claims
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1. A method for generating parametric output from a parametric loudspeaker system, comprising the steps of:
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retrieving a pre-encoded audio signal from an electronically readable storage medium, wherein an ultrasonic carrier signal having at least one sideband represents the pre-encoded audio signal; and
playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for storing parametric output for later playback from a parametric loudspeaker system, comprising the steps of:
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modulating the ultrasonic carrier with the audio signal to create at least one sideband which represents the audio signal and produces a processed signal; and
storing the processed signal on an electronically readable storage medium. - View Dependent Claims (9, 10)
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11. A device for storing parametric audio signals for output through a parametric loudspeaker system, comprising:
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an electronically readable storage medium; and
an ultrasonic carrier signal having at least one sideband which represents a pre-encoded audio signal, wherein said pre-encoded audio signal is stored on the electronically readable storage medium. - View Dependent Claims (12, 13, 14, 15, 16, 18, 19, 20, 21)
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17. A method for storing pre-encoded signals for a parametric loudspeaker system, comprising the steps of:
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receiving at least one audio sideband signal;
modulating an ultrasonic carrier signal with the audio sideband signal to create at least one sideband which represents the audio signal and form a modulated signal;
applying error correction to the modulated signal to form a processed signal;
storing the processed signal on an electronically readable storage medium for replay by the parametric loudspeaker system.
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22. A method for generating parametric output through a parametric loudspeaker system, comprising the steps of:
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receiving an incoming audio signal;
modulating an ultrasonic carrier signal with the audio signal to create at least one sideband which represents the audio signal and to form a modulated signal;
applying error correction to the modulated signal to form a processed signal;
storing the processed signal on an electronically readable storage medium; and
playing back the processed signal through an ultrasonic amplifier and emitter. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A device for generating parametric output through a parametric loudspeaker system, comprising:
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retrieval unit for retrieving a pre-encoded ultrasonic signal from an electronically readable storage medium that has ultrasonic bandwidth;
an amplifier, coupled to the retrieval unit, for amplifying the pre-encoded ultrasonic signal; and
an ultrasonic emitter, coupled to the amplifier, configured to emit ultrasonic waves that de-couple in the air to audible sounds.
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29. A device to store pre-encoded signals for a parametric loudspeaker system, comprising:
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an audio signal;
a modulator configured to modulate an ultrasonic carrier signal with the audio signal to create at least one sideband which represents the audio signal and to produce a modulated signal;
an error correction unit configured to pre-correct the modulated signal for de-modulation distortion created by demodulation of parametric output in air;
an electronically readable storage medium, having an ultrasonic bandwidth, configured to store the pre-corrected, modulated signal.
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30. A method for pre-encoding signals for a parametric loudspeaker system through a computer network, comprising the steps of:
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receiving an incoming audio signal at a network processing node;
modulating an ultrasonic carrier signal with the audio signal to create at least one sideband which represents the audio signal and to form a modulated signal using the network processing node; and
returning the modulated signal through the computer network for replay by the parametric loudspeaker system. - View Dependent Claims (31, 32)
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33. A method of inexpensively delivering information to a local listening area using parametric output from a parametric loudspeaker system, comprising the steps of:
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retrieving a pre-encoded audio signal from an electronically readable storage medium, wherein the pre-encoded audio signal includes an ultrasonic carrier signal having at least one sideband to represent the audio signal;
playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter to produce parametric output; and
directing the parametric output to a limited listening area. - View Dependent Claims (34, 35, 36, 40, 41)
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37. A method of inexpensively delivering information to a local listening area using parametric output from a parametric loudspeaker system to create a virtual speaker source, comprising the steps of:
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retrieving a pre-encoded audio signal from an electronically readable storage medium, wherein the pre-encoded audio signal includes an ultrasonic carrier signal having at least one sideband to represent the audio signal;
playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter to produce parametric output; and
directing the parametric output to a sound reflective surface which produces a virtual speaker source.
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38. A device for storing parametric audio signals for output through a parametric loudspeaker system, comprising:
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an electronically readable storage medium having an audible bandwidth storage capacity; and
a pre-distorted audio signal, having distortion error correction applied thereto, stored on the electronically readable storage medium.
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39. A method for generating parametric output from a parametric loudspeaker system, comprising the steps of:
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retrieving a pre-distorted audio signal from an electronically readable storage medium for storing an audible audio bandwidth;
modulating an ultrasonic carrier signal with the pre-distorted audio signal, to create at least one sideband, which represents an audio signal and produces a pre-encoded signal; and
playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter.
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42. A method for generating parametric output through a parametric loudspeaker system, comprising the steps of:
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receiving an incoming audio signal;
applying error correction to the audio signal to form an error corrected signal;
storing the error corrected signal on an electronically readable storage medium having an audible bandwidth;
retrieving the error corrected signal from the electronically readable storage medium;
modulating an ultrasonic carrier signal with the error corrected signal to create at least one sideband which represents the audio signal and to form a modulated signal; and
playing back the modulated signal through an ultrasonic amplifier and emitter.
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43. A device for storing parametric audio signals for output through a parametric loudspeaker system, comprising:
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an electronically readable storage medium having an audible bandwidth storage capacity; and
a pre-distorted audio signal, having distortion error correction, ultrasonic modulation and signal compression applied thereto, stored on the electronically readable storage medium. - View Dependent Claims (44, 45, 46, 47, 48, 50)
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49. A method for generating parametric output from a parametric loudspeaker system, comprising the steps of:
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retrieving a pre-processed audio signal from an electronically readable storage medium for storing an audible audio bandwidth, wherein the pre-processed audio signal has been distortion error corrected, modulated by an ultrasonic carrier, and compressed;
uncompressing the pre-processed audio signal; and
playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter.
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51. A method for generating parametric output through a parametric loudspeaker system, comprising the steps of:
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receiving an incoming audio signal;
applying error correction, ultrasonic modulation, and compression to the audio signal to form an error corrected signal;
storing the error corrected signal on an electronically readable storage medium having an audible bandwidth;
retrieving the error corrected signal from the electronically readable storage medium; and
playing back the modulated signal through an ultrasonic amplifier and emitter. It is to be understood that the above disclosure is not to be a basis of limiting scope of the future claims to be filed in connection with a non-provisional patent application which claims priority on this provisional filing;
but represents subject matter from which the applicant intends to develop appropriate claim language in a formal patent application.
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Specification