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Method and device for reducing distortion of loudspeaker, audio reproduction device

A technology of loudspeakers and equipment, applied in the direction of sensors, transducer circuits, stereo systems, etc., can solve the problems of harmonic difficulties and harmonic distortion of the original signal

Inactive Publication Date: 2016-08-10
SONTIA LOGIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to filter out and control the distortion that can introduce harmonics of the original signal; usually referred to as harmonic distortion

Method used

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  • Method and device for reducing distortion of loudspeaker, audio reproduction device
  • Method and device for reducing distortion of loudspeaker, audio reproduction device
  • Method and device for reducing distortion of loudspeaker, audio reproduction device

Examples

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Embodiment Construction

[0014] figure 1

[0015] figure 1 An audio reproduction device 101 is shown. The audio reproduction device includes a housing 102 and a digital audio input socket 103 . Internally, the reproduction device includes a digital signal processing system, an amplifier and one or more speakers. The digital signal processing system is configured to introduce the modulated ultrasonic signal to reduce speaker distortion.

[0016] in such as figure 1 In the example shown, the digital audio input jack 103 is configured to receive a digital audio input signal from the portable device 104 . In this embodiment, the rendering device is also configured to physically support the portable device 104 in a configuration commonly referred to as a dock.

[0017] figure 2

[0018] figure 2 An optional audio reproduction device 201 is shown. In this example, a digital audio input socket located on the rear of the device is configured to receive a digital audio input signal from a televisio...

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Abstract

Reduction of distortion introduced by speakers is shown. The ultrasonic generator (408) generates an ultrasonic signal. The signal processor is configured to process the input signal to generate a modulated signal, and to modulate the ultrasound signal to generate a modulated ultrasound signal. A combiner (403) combines the input signal and the modulated ultrasonic signal to generate an output signal. The signal processor comprises means (406) for calculating an absolute value and inverting means (407) for inverting the absolute value to generate the modulated signal.

Description

[0001] Cross references to related patent applications [0002] This application claims priority from UK Patent Application No. 11 08 646.9, filed 23 May 2011, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to techniques for reducing distortion introduced by loudspeakers. Background technique [0004] A problem with known loudspeakers is that, due to their construction, they can introduce distortion relatively easily. Some of these are mainly frequency-based and / or phase-based distortions, which can be removed by a filtering process. However, it is difficult to filter out and control distortions that can be introduced as harmonics of the original signal; often referred to as harmonic distortion. Contents of the invention [0005] According to a first aspect of the present invention there is provided a method of reducing distortion introduced by a loudspeaker, wherein an input signal is provided to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04S2400/09H04R3/04
Inventor 克里斯托弗·大卫·弗农
Owner SONTIA LOGIC
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