A method and device for obtaining denoised speech signals
A speech signal and signal value technology, applied in speech analysis, instruments, etc., can solve the problems of inability to apply intensive data processing, large amount of computation, and inability to de-noise speech signals with noise.
Active Publication Date: 2019-09-13
GUANGZHOU KUGOU COMP TECH CO LTD
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[0005] The gain function of the MMSE-LSA speech enhancement algorithm involves exponential integral operations and exponential operations, and the above operations have a huge amount of computation, which cannot be applied to mobile phones and other devices that are not good at intensive data processing, that is, they cannot be used on mobile phones. The signal is denoised to obtain the denoised speech signal
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[0049] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0050]An embodiment of the present invention provides a method for acquiring a denoised speech signal, where the subject of execution of the method is a terminal. Wherein, the terminal may be a terminal capable of acquiring voice signals but not good at intensive data processing, such as a mobile phone and a tablet computer. The terminal may be provided with a processor and a memory, the processor may be used for processing related to sound quality detection, and the memory may be used for storing data required and generated during the following processing. It can also be provided with an input / output component and a transceiver. The input component can be used to receive instructions input by the user, which can be a keyboard, a micro...
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The invention discloses a method for acquiring a denoised voice signal and belongs to the field of voice denoising. The method comprises the following steps: determining a target prior signal-to-noise ratio and a target posterior signal-to-noise ratio corresponding to a target time frequency point of a target noisy voice signal; according to the target prior signal-to-noise ratio and the target posterior signal-to-noise ratio, calculating a target estimating signal-to-noise ratio corresponding to the target time frequency point; according to a prestored corresponding relationship between an estimating signal-to-noise ratio and a gain value as well as the target estimating signal-to-noise ratio, determining a gain value corresponding to the target time frequency point; and according to the gain value corresponding to each time frequency point of the target noisy voice signal, performing gain processing on the target noisy voice signal to acquire a denoised voice signal. By the method for acquiring the denoised voice signal, a terminal with low data processing capacity also can perform denoising processing on the noisy voice signal to acquire the denoised voice signal.
Description
technical field [0001] The invention relates to the field of voice denoising, in particular to a method and device for obtaining a denoising voice signal. Background technique [0002] With the development and progress of modern society, noise has also become an increasingly serious problem, which has a great impact on people's lives. For example, in daily voice calls, various noises will interfere with the voice signal, so that the generated voice signal will contain a lot of noise. [0003] MMSE-LSA (Minimum Mean Square Error-Log Spectral Amplitude Estimator, Minimum Mean Square Error Log Spectral Amplitude Estimator) speech enhancement algorithm is a gain function estimation algorithm that can effectively eliminate noise. The algorithm processing process is as follows. The speech signal is divided into frames, and the noisy speech signal is Fourier transformed to obtain its spectrum. Then, for the noisy speech signal of each frequency in each frame, the noise estimation...
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IPC IPC(8): G10L21/0216G10L25/60
Inventor 肖纯智
Owner GUANGZHOU KUGOU COMP TECH CO LTD