Audio signal enhancement processing method and related device
A technology for audio signal enhancement processing, applied in speech analysis, instruments, etc., can solve the problems of inapplicability and insignificant audio signal enhancement effect, and achieve the best enhancement effect
Active Publication Date: 2019-12-24
IFLYTEK CO LTD
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[0004] However, the inventor found through research that the bistable stochastic resonance system with constant system parameters has strong constraints on the pickup signal, and the signal-to-noise ratio of different pickup signals is likely to be different, so the bistable stochastic resonance system with constant system parameters is used. The audio signal enhancement processing of the bistable stochastic resonance system, the enhancement effect of the audio signal in the pickup signal under certain noise ratios is not obvious, that is, the bistable stochastic resonance system with constant system parameters is not suitable for pickup under different signal-to-noise ratios Audio signal enhancement processing in audio signal
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[0048] In order to enable those skilled in the art to better understand the solutions of the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only It is a part of the embodiments of this application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.
[0049] At this stage, methods such as filtering, multi-array beamforming, or stochastic resonance processing can be used for audio signal enhancement. Among them, the filtering method inevitably causes attenuation and distortion of the audio signal while filtering out the noise signal, and more filtering parameters need to be considered and low practicability; the multi-array beamfor...
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The invention discloses an audio signal enhancement processing method and a related device. The method comprises the following steps of taking a signal-to-noise ratio of a pickup signal including an audio signal and a noise signal as an input signal-to-noise ratio of a bistable stochastic resonance system; adjusting system parameters of the bistable stochastic resonance system according to the input signal-to-noise ratio and an output signal-to-noise ratio of the bistable stochastic resonance system; and inputting the pickup signal to the bistable stochastic resonance system subjected to the parameter adjustment so as to obtain an enhanced audio signal corresponding to the audio signal. It can be seen that the system parameters of the bistable stochastic resonance system are adjusted by the signal-to-noise ratio of the pickup signal and the output signal-to-noise ratio of the bistable stochastic resonance system, so that the gain of the output signal-to-noise ratio of the bistable stochastic resonance system subjected to the parameter adjustment is maximum for the pickup signal; and the pickup signal is input to the bistable stochastic resonance system subjected to the parameter adjustment, so that the enhancement effect of the audio signal is optimal. The technical scheme is suitable for audio signal enhancement processing of the pickup signal under different signal-to-noise ratios.
Description
Technical field [0001] This application relates to the technical field of audio signal processing, and in particular to a method and related devices for audio signal enhancement processing. Background technique [0002] In the process of picking up audio signals, the picked-up audio signals are usually inevitably mixed with noise signals generated by the background environment where the audio signals are located, that is, the picked-up signals include audio signals and noise signals. When the audio signal in the pickup signal is analyzed and processed, the noise signal will have a certain impact on the audio signal. Therefore, the audio signal in the pickup signal needs to be enhanced to ensure the quality of the audio signal. [0003] At present, the stochastic resonance processing method can be used for audio signal enhancement processing. Specifically, the pickup signal including audio signal and noise signal is input into a bistable stochastic resonance system with constant sys...
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IPC IPC(8): G10L21/007G10L21/02G10L25/15
CPCG10L21/007G10L21/02G10L25/15
Inventor 李清谢信珍蒋亮亮李胜才李冬冬
Owner IFLYTEK CO LTD