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Noise suppression method and device for quickly calculating voice existence probability, storage medium and terminal

A fast computing and voice technology, applied in voice analysis, instruments, etc., to achieve the effects of suppressing noise, optimizing noise reduction performance, and wide application range

Active Publication Date: 2020-11-06
UNISOC CHONGQING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention is how to quickly and accurately suppress the noise in the noisy speech

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  • Noise suppression method and device for quickly calculating voice existence probability, storage medium and terminal
  • Noise suppression method and device for quickly calculating voice existence probability, storage medium and terminal
  • Noise suppression method and device for quickly calculating voice existence probability, storage medium and terminal

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Embodiment Construction

[0048] As mentioned in the background art, there is noise in the communication process, which will interfere with voice transmission.

[0049] To solve this problem, a series of noise suppression methods are adopted in the prior art, and noise suppression usually includes noise estimation and gain calculation. Among them, noise estimation includes two aspects, one is noise tracking speed, and the other is noise estimation accuracy. The accuracy of noise estimation will directly affect the final effect. When the noise estimation is too high, the weak voice will be removed when filtering the noise, resulting in speech distortion; if the noise estimation is too low, too much background noise will remain after filtering the noise , especially when the background noise is non-stationary noise, due to the rapid change of the noise, it is difficult to estimate the noise, resulting in too much residual noise, so continuous tracking of the noise is required. The currently widely used ...

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Abstract

The invention discloses a noise suppression method and device for quickly calculating a voice existence probability, a storage medium and a terminal, and the method comprises the steps: obtaining an input signal, and converting the input signal into a frequency domain signal from a time domain signal; calculating a real-time power spectrum of the frequency domain signal, and tracking a minimum power value in the real-time power spectrum; performing noise estimation according to the minimum power value to obtain an estimated noise power spectrum; calculating a gain coefficient according to theestimated noise power spectrum, and enhancing the frequency domain signal according to the gain coefficient to obtain an enhanced frequency domain signal; and converting the enhanced frequency domainsignal into a time domain signal to obtain an output signal. According to the method, the power minimum value of the real-time power spectrum is tracked by adopting a continuous spectrum minimum valuetracking method, so that the noise in the voice signal can be quickly and accurately suppressed.

Description

technical field [0001] The invention relates to the technical field of voice communication, in particular to a noise suppression method and device, a storage medium, and a terminal for quickly calculating the voice existence probability. Background technique [0002] In the process of real-time voice communication and voice message transmission through Voice over Internet Protocol (VOIP), environmental noise and voice interference from people around will be picked up by the near-end microphone of the device, and the picked up voice is usually signal The signal-to-noise ratio (SNR for short) is low. If the signal is sent without processing it, the noise in it will interfere with the far end's understanding of the call content; at the same time, if the noise is not handled properly, it may cause distortion to the near-end voice and affect the intelligibility of the voice. For example, in the field of human-computer interaction, because the noise in the environment is picked u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216G10L21/0232G10L25/21
CPCG10L21/0216G10L21/0232G10L25/21Y02D30/70G10L25/78
Inventor 巴莉芳康力
Owner UNISOC CHONGQING TECH CO LTD
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