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Speech enhancement method/system, computer readable storage medium and electronic equipment

A technology for voice enhancement and electronic equipment, applied in the fields of computer-readable storage media and electronic equipment, and voice enhancement methods/systems, can solve the problems of reduced interference reduction capability and unfavorable practical applications, and achieve robustness enhancement, enhanced low-frequency reduction, etc. Interference ability, the effect of narrowing the selection range

Active Publication Date: 2018-11-23
FUZHOU ROCKCHIP SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a speech enhancement method / system, computer-readable storage medium and electronic equipment, which are used to solve the problems in the prior art by using the normalized autocorrelation matrix. A diagonal loading factor is added to the main diagonal elements to achieve the purpose of increasing the white noise gain constraint, but controlling the white noise gain and maintaining the ability to reduce interference are contradictory, and increasing the white noise gain constraint will inevitably lead to super-gain beamforming The ability to reduce interference is reduced; and the value range of the diagonal loading factor is from zero to infinity. Since this factor is difficult to choose, it is not conducive to practical application problems

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  • Speech enhancement method/system, computer readable storage medium and electronic equipment
  • Speech enhancement method/system, computer readable storage medium and electronic equipment
  • Speech enhancement method/system, computer readable storage medium and electronic equipment

Examples

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Embodiment 1

[0050] This embodiment provides a voice enhancement method, which is characterized in that it is applied to an electronic device, and a microphone array is set in the electronic device; the voice enhancement method includes the following steps:

[0051] Step 1, performing short-time Fourier transform on the input signal of the microphone array to form a frequency domain input signal;

[0052] Step 2, under the constraint that the microphone array is guaranteed to be undistorted in the desired direction, an optimized super-gain beamformer is generated to process the frequency-domain input signal through the super-gain beamformer to form Ultra-gain beam processing output signal;

[0053] Step 3, on the basis of the delay-and-sum beamformer processing the frequency-domain input signal by the pre-stored delay-and-sum beamformer to process the output signal of the delay-and-sum beam, perform low-frequency white noise gain on the super-gain beam-processed output signal Correction t...

Embodiment 2

[0105] This embodiment provides a voice enhancement system, which is applied to electronic equipment, and a microphone array is set in the electronic equipment; the voice enhancement system includes:

[0106] A Fourier transform module, configured to perform short-time Fourier transform on the input signal of the microphone array to form a frequency-domain input signal;

[0107] A processing module, configured to generate an optimized super-gain beamformer under the constraint that the microphone array is not distorted in a desired direction, so as to process the frequency-domain input signal through the super-gain beamformer, processing the output signal to form a super-gain beam;

[0108] A correction module, configured to perform low-frequency whitening on the super-gain beam processing output signal on the basis of the delay-add beam processing output signal formed by the pre-stored delay-add beamformer processing the frequency-domain input signal Noise gain correction, p...

Embodiment 3

[0143] This embodiment provides an electronic device 6, please refer to Figure 6 , is shown as a schematic structural diagram of the electronic device in an embodiment of the electronic device. Such as Figure 6 As shown, the electronic device 6 provided by this example includes: a processor 61, a memory 62, a transceiver 63, a communication interface 64, and a system bus 65; the memory and the communication interface are connected to the processor and the transceiver through the system bus and complete the mutual The memory is used to store computer programs, the communication interface is used to communicate with other devices, and the processor and transceiver are used to run the computer programs, so that the electronic device 6 executes the various steps of the voice enhancement method provided in Embodiment 1.

[0144] The system bus mentioned above may be a Peripheral Component Interconnect (PCI for short) bus or an Extended Industry Standard Architecture (EISA for sh...

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Abstract

The invention provides a speech enhancement method / system, a computer readable storage medium and electronic equipment. The speech enhancement method comprises the following steps: performing short-time Fourier transform on the input signal of a microphone array so as to form a frequency domain input signal; generating an optimized super-gain beam former to process the frequency domain input signal through the super-gain beam former so as to form a super-gain beam processing output signal; performing low-frequency white noise gain correction on the super-gain beam processing output signal so as to determine whether the low-frequency white noise gain correction result is the super-gain beam processing output signal or the delayed addition beam processing output signal; and performing low-frequency noise reduction compensation on the low-frequency white noise gain correction result so as to output the frequency domain signal after low-frequency noise reduction compensation. The problem of white noise amplification can be controlled and the low-frequency interference dropping ability can be reduced to a certain extent. Moreover, after application of the speech enhancement method, theselection range of the diagonal loading factor is reduced and the robustness is enhanced so as to be favorable for practical application.

Description

technical field [0001] The invention belongs to the technical field of audio processing, and relates to an enhancement method and system, in particular to a voice enhancement method / system, a computer-readable storage medium and electronic equipment. Background technique [0002] The information provided by traditional single-microphone technology is limited to time / frequency information, so its noise reduction performance is not ideal. The microphone array can provide airspace and time / frequency information, which can better solve this problem. [0003] A core technology of microphone array signal processing is beamforming technology, that is, the received signal of the microphone array is weighted to maximize the gain of the array pattern in the direction of the desired signal, while the total output power of the system is minimized, thereby completing spatial filtering. [0004] According to different implementation methods, existing beamforming technologies can be class...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216G10L21/0232
CPCG10L21/0216G10L21/0232G10L2021/02166
Inventor 张益萍
Owner FUZHOU ROCKCHIP SEMICON
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