Single-channel voice enhancement method and device, storage medium and terminal

A voice enhancement, single-channel technology, used in voice analysis, instruments, etc., can solve problems such as affecting the quality of voice calls, unsatisfactory, and poor noise reduction effect, so as to improve subjective experience, enhance significantly, and suppress non-stationary noise. Effect

Active Publication Date: 2020-08-18
SPREADTRUM COMM (TIANJIN) INC
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Problems solved by technology

[0006] However, the performance of existing speech enhancement technologies in non-stationary noise and hands-free call scenarios is not satisfactory, and the noise reduction effect is poor, which seriously affects the quality of speech calls

Method used

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  • Single-channel voice enhancement method and device, storage medium and terminal
  • Single-channel voice enhancement method and device, storage medium and terminal
  • Single-channel voice enhancement method and device, storage medium and terminal

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Embodiment Construction

[0038] As mentioned in the background art, when people use mobile devices (such as mobile phones, telephone watches) to make daily calls, they are often exposed to noisy background environments, and most of these noises are statistically non-stationary noises.

[0039] Traditional voice enhancement technology usually uses the voice activity detection (Voice Activity Detection, referred to as VAD) method to determine whether there is voice in each frame signal in the time domain, that is, to identify the voice frame and the pure noise frame from a noisy voice signal. The algorithm only estimates and updates the noise in the pure noise frame judged by VAD, and performs noise reduction in the speech frame according to the estimated noise spectrum.

[0040] This method of speech enhancement is effective for stationary noise that does not vary much. But for non-stationary noise, since the noise may change greatly in the speech frame, the noise spectrum estimated in the pure noise f...

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Abstract

The invention discloses a single-channel voice enhancement method and device, a storage medium and a terminal. The method comprises the steps of obtaining a frequency domain amplitude spectrum of a current frame signal based on a received input signal; performing VAD processing on the full band of the current frame signal based on the frequency domain amplitude spectrum of the current frame signalto obtain an initial full band amplitude spectrum gain function of the current frame signal; dividing the whole band into a plurality of sub-bands; performing VAD processing on the plurality of sub-bands of the current signal frame based on the frequency domain amplitude spectrum of the current frame signal and the initial full-band amplitude spectrum gain function, and updating the initial full-band amplitude spectrum gain function according to the VAD processing result of each sub-band to obtain an updated full-band amplitude spectrum gain function of the current frame signal; and calculating according to the frequency domain amplitude spectrum of the current frame signal and the updated full-band amplitude spectrum gain function to obtain a frequency spectrum after speech enhancement.Through the scheme of the invention, non-stationary noise can be effectively suppressed, the voice quality is protected from being lost, and the voice call quality of mobile equipment such as a mobilephone is favorably improved.

Description

technical field [0001] The present invention relates to the technical field of voice processing, in particular to a single-channel voice enhancement method and device, a storage medium, and a terminal. Background technique [0002] With the popularization of mobile devices such as mobile phones and the construction and development of mobile networks, users have higher and higher requirements for the quality of voice calls. [0003] When making a voice call, the near-end speaker is often placed in a noisy background environment, and the noise in the environment will pollute useful voice information. If the uplink voice signal containing noise is not processed, it will cause great trouble to the remote receiver, making it impossible to accurately grasp the meaning of the voice. [0004] In addition, there are some cases where the near-end talker is not only in a noisy environment, but also turns on the hands-free talking mode during the call. For example, the driver turns on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0232G10L25/18
CPCG10L21/0232G10L25/18
Inventor 纪伟于伟维潘思伟雍雅琴董斐林福辉
Owner SPREADTRUM COMM (TIANJIN) INC
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