CN103310796A - Voice signal extraction method - Google Patents
Voice signal extraction method Download PDFInfo
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- CN103310796A CN103310796A CN201310269608XA CN201310269608A CN103310796A CN 103310796 A CN103310796 A CN 103310796A CN 201310269608X A CN201310269608X A CN 201310269608XA CN 201310269608 A CN201310269608 A CN 201310269608A CN 103310796 A CN103310796 A CN 103310796A
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Abstract
The invention discloses a voice signal extraction method which includes the steps: analyzing frequency response of acquired environmental sound signals according to set noise and voice frequency range and separating noise signals and voice signals from the ambient sound signals; reversely suppressing the noise signals according to the phase of the noise signals to acquire residual voice signals; and acquiring current voice signals according to the voice signals and the residual voice signals. The noise signals and the voice signals are separated from a noisy environment, the noise signals can be reduced, the voice signals are extracted from the environmental sound signals and applied to manual auditory device users, and accordingly, the language communication capacity of the manual auditory device users in the noisy environment is improved.
Description
Technical field
The present invention relates to field of voice signal, particularly the voice signal extracting method.
Background technology
The application of artificial hearing device (such as osophone, cochlear implant etc.) is more and more, and these artificial hearing devices have improved the auditory language ability to exchange of deaf individual in quiet or relatively quiet environment, bring the user and help greatly.But existing artificial hearing device still exists problem.For example, in the many noisy environments of people, the user can't extract effective information and exchange, such as dining room, school, meeting-place etc., because the ground unrest composition mostly is phonetic sound, artificial hearing device is difficult to extract communicatee's voice messaging, therefore under this environment the communication difficulty can occur.
Summary of the invention
The objective of the invention is to provide a kind of voice signal extracting method, improve the communication skills of user in noisy environment.
According to an aspect of the present invention, provide a kind of voice signal extracting method, comprised,
According to setting noise and voice frequency range, the environmental sound signal that gathers is carried out Frequency Response Analysis, therefrom isolate noise signal and voice signal;
According to the noise signal phase place, noise signal is carried out anti-phase inhibition, obtain residual voice signal;
According to described voice signal and residual voice signal, obtain the current speech signal.
In some embodiments, before the step of carrying out Frequency Response Analysis, can also gather ambient sound by multi-direction voice collection device, obtain environmental sound signal.Because multi-direction voice collection device can receive voice signal from a plurality of directions, therefore can realize the comprehensive collection effect to environmental sound signal.
In some embodiments, multi-direction voice collection device can be the directive property harvester.Owing to adopting the directive property harvester so that different microphone can gather environmental sound signal from different pointing directions, therefore noise signal and voice signal can be realized in noisy environment, distinguishing, the comprehensive and accuracy of environmental sound signal can also be realized gathering simultaneously.Simultaneously, can also collect the voice signal of rule by the directive property harvester, be convenient to sound signal processing, improve sound signal processing speed.
In some embodiments, the directive property harvester can comprise polyhedral shell, microphone and signal processor, on each face of polyhedral shell the directive property pipeline can be installed, microphone can be arranged in the directive property pipeline, and the output terminal of microphone can be connected with the input end of signal processor.Because therefore the setting of directive property pipeline can realize comprising noise and voice and other sporadic sound from a plurality of direction reception environment voice signals, has improved the comprehensive and accuracy of collected sound signal.Because microphone is arranged in the directive property pipeline, the neighbourhood noises such as picture dining room, cocktail party, meeting-place, classroom are from from all directions, the noise spectrum that each microphone is accepted is the same with the sound intensity, and voice signal usually come from the communication the voice sender to, then the voice signal that receives of different microphones is different, point to the voice sender to microphone to receive the signal sound intensity larger, and dorsad or the sound intensity of the voice signal of other direction a little less than.In the certain hour section, the noise sound intensity and frequency are basically identical, change not quite, and the sound intensity and the tone of the voice signal that exchanges have certain tempo variation, and other sporadic sound do not have the feature of tempo variation.In noisy environment, noise source is compared the distant of source speech signal usually, and the feature of voice can not covered fully by ground unrest, therefore just can exactly they be separated with the feature of voice according to noise.Because microphone is connected with signal processor, so the voice signal that microphone collects can carry out the signal processing by signal processor.
In some embodiments, signal processor can be dsp processor, owing to the effect of dsp processor, therefore can realize the digital signal processing of sound.
In some embodiments, the directive property pipeline can comprise the collection taper hole, gathers the taper hole terminal part and can be provided with acquisition cavity, and the collection terminal of microphone is positioned at acquisition cavity.Because it is larger to gather the taper hole opening, and sound is converged in the taper hole from all quarter, the collection terminal that therefore is conducive to microphone gathers sound.
In some embodiments, can adhere to soft coating on the inwall of directive property pipeline.Because therefore the structure of soft coating can reduce acoustic reflection in the pipeline, has improved transfer voice efficient.
Beneficial effect of the present invention is: because to the anti-phase inhibition of noise signal, reduce noise, obtain residual voice signal, according to isolated voice signal and residual voice signal, therefore can realize from environmental sound signal, extracting the technique effect of current speech signal.
Description of drawings
Fig. 1 is the step schematic diagram of the voice signal extracting method of one embodiment of the present invention.
Fig. 2 is the structural representation of directive property harvester shown in Figure 1.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
Fig. 1 has schematically shown the voice signal extracting method according to one embodiment of the present invention.As shown in Figure 1, the step of the method is as follows:
Step S101: by multi-direction voice collection device ambient sound is gathered, obtain environmental sound signal.Multi-direction voice collection device is the directive property harvester, and as shown in Figure 2, the directive property harvester comprises square housing 1, built-in four the directive property pipelines 2 of each face of housing 1, and the inwall of directive property pipeline 2 is with soft lubricious.Each directive property pipeline 2 comprises collection taper hole 21 and acquisition cavity 22, gathers taper hole 21 terminal parts and is provided with acquisition cavity 22, and the collection terminal of microphone 3 is positioned at acquisition cavity 22.On each face of housing 1 signal processor is installed all, the output terminal of microphone 3 is connected with the input end of signal processor.Signal processor is dsp processor 4, adopts the PCM4204 chip of TI company.The directive property harvester gathers environmental sound signal by directive property pipeline 2, directive property pipeline 2 is the receiving cable of extraneous sound source, this receiving cable has different sensings, so that extraneous sound source is input to directive property pipeline 2 from all directions, and is transferred to each microphone 3 and gathers environmental sound signal.
Step S102: the environmental sound signal that collects is changed through A/D, voice signal is converted to digital signal, and the range of audibility 125Hz～8000Hz that is exchanged according to the normal person by dsp processor and the embedded software with numerical analysis function, voice Hz-KHz 350Hz～5000Hz that the normal person exchanges, the frequency range of voice Hz-KHz 500Hz～2500Hz that deaf individual can exchange is judged, isolate noise signal and voice signal by following Frequency Response Analysis process: will be constant in Hz-KHz 63Hz～8000Hz and the identical sound separation signal of the sound intensity, carry out numerical analysis, be separated into noise signal, with in Hz-KHz 125Hz～8000Hz or 350Hz～5000Hz or the 500Hz～2500Hz and have a voice signal of frequency response continuous-changing features, carry out numerical analysis, be separated into voice signal.
Step S103: noise signal is modulated by Fourier transform and anti-phase modulation algorithm, and superpose with input noise, thereby the reduction noise obtains residual voice signal, thereby extracts the current speech signal from isolated voice signal and residual voice signal.
The current speech signal that extracts by wireless transmission method for hearing aid user, thereby improve the communication skills of user in noisy environment.
Above-described only is some embodiments of the present invention.For the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, these all belong to the protection domain of invention.
Claims (7)
1. the voice signal extracting method is characterized in that, comprises that step is:
According to setting noise and voice frequency range, the environmental sound signal that gathers is carried out Frequency Response Analysis, therefrom isolate noise signal and voice signal;
According to the noise signal phase place, noise signal is carried out anti-phase inhibition, obtain residual voice signal;
According to described voice signal and residual voice signal, obtain the current speech signal.
2. voice signal extracting method according to claim 1, it is characterized in that, according to setting noise and voice frequency range, the environmental sound signal that gathers is carried out also comprise before the step of Frequency Response Analysis, by multi-direction voice collection device ambient sound is gathered, obtain environmental sound signal.
3. voice signal extracting method according to claim 2 is characterized in that, described multi-direction voice collection device is the directive property harvester.
4. voice signal extracting method according to claim 3 is characterized in that, described directive property harvester comprises: polyhedral shell, microphone and signal processor; The directive property pipeline is installed on each face of described polyhedral shell, and described microphone is arranged in the described directive property pipeline, and the output terminal of described microphone is connected with the input end of described signal processor.
5. voice signal extracting method according to claim 4 is characterized in that, described voice signal processor is dsp processor.
6. voice signal extracting method according to claim 4 is characterized in that, described directive property pipeline comprises the collection taper hole, and described collection taper hole terminal part is provided with acquisition cavity, and the collection terminal of described microphone is positioned at acquisition cavity.
7. according to claim 4 or 6 described voice signal extracting method, it is characterized in that, also adhere to soft coating on the inwall of described directive property pipeline.
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| CN105745119A (en) * | 2013-11-19 | 2016-07-06 | 歌乐株式会社 | Headrest device and sound collecting device |
| CN108986822A (en) * | 2018-08-31 | 2018-12-11 | 出门问问信息科技有限公司 | Audio recognition method, device, electronic equipment and non-transient computer storage medium |
| CN109218882A (en) * | 2018-08-16 | 2019-01-15 | 歌尔科技有限公司 | The ambient sound monitor method and earphone of earphone |
| CN109243453A (en) * | 2018-10-29 | 2019-01-18 | 珠海格力电器股份有限公司 | Voice information processing method and device, storage medium and electronic device |
| CN110853622A (en) * | 2019-10-22 | 2020-02-28 | 深圳市本牛科技有限责任公司 | Method and system for sentence segmentation by voice |
| CN112885366A (en) * | 2021-01-18 | 2021-06-01 | 宇龙计算机通信科技(深圳)有限公司 | Active noise reduction method and device, storage medium and terminal |
| CN113825082A (en) * | 2021-09-19 | 2021-12-21 | 武汉左点科技有限公司 | Method and device for relieving hearing aid delay |
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| CN108986822A (en) * | 2018-08-31 | 2018-12-11 | 出门问问信息科技有限公司 | Audio recognition method, device, electronic equipment and non-transient computer storage medium |
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| CN112885366A (en) * | 2021-01-18 | 2021-06-01 | 宇龙计算机通信科技(深圳)有限公司 | Active noise reduction method and device, storage medium and terminal |
| CN113825082A (en) * | 2021-09-19 | 2021-12-21 | 武汉左点科技有限公司 | Method and device for relieving hearing aid delay |
| CN113825082B (en) * | 2021-09-19 | 2024-06-11 | 武汉左点科技有限公司 | Method and device for relieving hearing aid delay |
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