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Calibration method and device of active noise reduction system of wearable equipment, storage medium and terminal

A technology for active noise reduction and wearable devices, applied in hearing devices with active noise reduction, active noise control, earphones to reduce environmental noise, etc., can solve the problems of limited noise reduction performance and low mass production yield, and achieve consistency The effect of low requirements, improved calibration efficiency, and good noise reduction performance

Pending Publication Date: 2021-09-03
RDA MICROELECTRONICS SHANGHAICO LTD
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Problems solved by technology

[0006] The technical problem solved by the invention is how to solve the problems of low mass production yield and limited noise reduction performance in the traditional calibration scheme

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  • Calibration method and device of active noise reduction system of wearable equipment, storage medium and terminal
  • Calibration method and device of active noise reduction system of wearable equipment, storage medium and terminal
  • Calibration method and device of active noise reduction system of wearable equipment, storage medium and terminal

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Embodiment Construction

[0029] As mentioned in the background art, existing production line calibration solutions may have the problems of low mass production yield and limited noise reduction performance of wearable devices.

[0030] To solve the above problems, an embodiment of the present invention provides a wearable device including an active noise reduction system 10 . See figure 1 , figure 1 It is a schematic structural diagram of the active noise reduction system 10 . The active noise reduction system 10 includes: an audio playback module 101, configured to play an input audio signal. The sound collection module 102 is configured to collect the audio signal played by the audio playback module 101 or the audio signal played by the external playback module 11 . The filter 103 is used to filter the audio signal collected by the sound collection module 102 to generate a noise reduction signal, and the filter may include a single feedforward filter or a single feedback filter or a hybrid of fee...

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Abstract

The invention discloses a calibration method and device of an active noise reduction system of wearable equipment, a storage medium and a terminal. The method comprises the steps: starting the active noise reduction system, enabling an audio playing module to play a noise test signal, and collecting the noise test signal through a sound collection module; calculating secondary path estimation of the active noise reduction system; stopping playing the noise test signal, playing an environment noise through an external playing module, and configuring an initial parameter of the active noise reduction system and a preset calibration coefficient of a filter, wherein the initial parameter comprises the secondary path estimation; and enabling the audio playing module to play the noise reduction signal, and acquiring the target coefficient of the filter, wherein the target coefficient is used for calibrating the filter. According to the scheme, the mass production yield of the wearable equipment can be improved, and the noise reduction performance is increased.

Description

technical field [0001] The present invention relates to the field of audio signal processing, in particular to a calibration method and device, a storage medium, and a terminal for an active noise reduction system of a wearable device. Background technique [0002] Wearable devices that perform audio processing such as earphones usually include an Active Noise Cancellation (ANC) system. Neutralize and offset to achieve the effect of noise reduction. In order to improve the noise reduction effect, many active noise reduction wearable devices have been improved from a single feedforward and single feedback structure to a hybrid structure of feedforward and feedback, which can improve the depth and width of noise reduction. But no matter which structure is used, the best noise reduction experience can only be achieved if the optimal coefficient of the noise reduction filter is obtained through calibration. [0003] For earphones, a wearable device, the mass production stage i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178H04R1/10
CPCG10K11/17854G10K11/17879H04R1/1083G10K2210/1081G10K2210/504H04R2460/01
Inventor 方思敏叶顺舟罗丽云
Owner RDA MICROELECTRONICS SHANGHAICO LTD
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