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Combined active noise cancellation and noise compensation in headphone

A technology of active noise cancellation and noise compensation, which is used in active noise cancellation hearing devices, earphones to reduce ambient noise, active noise control, etc.

Active Publication Date: 2017-08-18
DOLBY LAB LICENSING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be noted that the effect of noise cancellation techniques is limited below (approximately) 1500Hz
Cancellation of higher frequency noise is constrained by hardware limitations

Method used

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  • Combined active noise cancellation and noise compensation in headphone
  • Combined active noise cancellation and noise compensation in headphone
  • Combined active noise cancellation and noise compensation in headphone

Examples

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Embodiment Construction

[0021] Example embodiments are described below with reference to the accompanying drawings. It should be noted that, for the purpose of clarity, the representation and description of parts and processes known to those skilled in the art but not related to the example embodiments are omitted from the drawings and descriptions.

[0022] As will be appreciated by one skilled in the art, aspects of the example embodiments may be embodied as a system, method or computer program product. Accordingly, example embodiments may be embodied in an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, microcode, etc.), or an embodiment combining software and hardware portions, as described herein. It may generally be referred to as a "circuit," "module," or "system." Furthermore, aspects of the example embodiments may take the form of a computer program product embodied on one or more computer-readable media having computer-readable program ...

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Abstract

The disclosure relates to combined active noise cancellation and noise compensation in a headphone. An audio processing device includes a selector and a noise compensation unit. The selector can select one of a plurality of first transfer functions based on at least one feature of at least one of an external noise and a content audio signal representing a sound to be reproduced through the headphone. The noise compensation unit can compute a second audio signal by applying the selected first transfer function to a first audio signal, and derive gains for the noise compensation at least based on the second audio signal. The at least one feature can be used to distinguish at least two of the first transfer functions. Each of the first transfer functions can transform the first audio signal to the second audio signal which is assumed as representing a version of the sound represented by the first audio signal, which arrives at an eardrum of a listener wearing the headphone. The first audio signal is one of a noise signal representing the external noise and the content audio signal.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to Chinese Patent Application No. 201410521327.3, filed on September 30, 2014, and U.S. Provisional Patent Application No. 62 / 074881, filed on November 4, 2014, both of which are hereby incorporated by reference in their entirety. . technical field [0003] Embodiments disclosed herein relate generally to joint active noise cancellation and noise compensation of headphones. More specifically, example embodiments relate to audio enhancement headphones with hybrid active noise cancellation and noise compensation. Background technique [0004] Techniques of active noise cancellation and noise compensation have been proposed to improve the playback quality of headphones in the presence of external interference. For example, in WO2013144099A1, "Apparatus and Method for Improving the Perceived Quality of Sound Reproduction by Combining Active NoiseCancellation and Perceptual Noise compensati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/178H04R1/1083G10K2210/3025G10K2210/1081G10K2210/3224H03G5/165H03G3/32G10K11/17873G10K11/17861G10K11/17827G10K11/17881G10K11/17857G10K11/17885G10K11/17823H04R2460/01G10K2210/30232G10K2210/3055
Inventor 马桂林郑羲光
Owner DOLBY LAB LICENSING CORP
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