CN109637552A - A kind of method of speech processing for inhibiting audio frequency apparatus to utter long and high-pitched sounds - Google Patents
A kind of method of speech processing for inhibiting audio frequency apparatus to utter long and high-pitched sounds Download PDFInfo
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- CN109637552A CN109637552A CN201811439246.3A CN201811439246A CN109637552A CN 109637552 A CN109637552 A CN 109637552A CN 201811439246 A CN201811439246 A CN 201811439246A CN 109637552 A CN109637552 A CN 109637552A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17819—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the output signals and the reference signals, e.g. to prevent howling
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L21/0232—Processing in the frequency domain
Abstract
The invention discloses a kind of method of speech processing that inhibition audio frequency apparatus is uttered long and high-pitched sounds to extract feature of uttering long and high-pitched sounds this method comprises: pretreatment voice data, calculates speech signal spec-trum, inhibits signals step of uttering long and high-pitched sounds.The present invention can accurately judge signal of uttering long and high-pitched sounds in real time, and the phenomenon of uttering long and high-pitched sounds for effectively audio frequency apparatus being inhibited to generate promotes the sound quality of voice, be suitable for audio frequency apparatus transmitting terminal or receiving end.
Description
Technical field
The present invention relates to a kind of method of speech processing that audio is set more particularly to a kind of voices for inhibiting audio frequency apparatus to utter long and high-pitched sounds
Processing method belongs to wireless communication technology field.
Background technique
With the development of communication technology, wireless telecom equipment greatly facilitates daily life and work, especially
It is mobile terminal device, is not only widely used in personal lifestyle, demand of the every profession and trade to wireless telecom equipment is also increasingly
Extensively, such as the industries such as rail traffic, security protection, public security have more specifically demand to private radio communication equipment.
Bigger to the volume requirement of voice frequency terminal equipment due to the Special use scene of private network industry, this there is sound
Phenomenon of uttering long and high-pitched sounds is generated between frequency equipment.
Phenomenon of uttering long and high-pitched sounds is one kind of acoustic feedback, and in two equipment communication process, hypotelorism, speaker volume are sufficiently large
When, phenomenon of uttering long and high-pitched sounds can be generated, generation of uttering long and high-pitched sounds needs to meet three conditions: first is that microphone uses simultaneously with loudspeaker；Second is that loudspeaking
Device sound can pass to microphone by space；Third is that the acoustic energy that loudspeaker issues is sufficiently large, the pickup sensitivity foot of microphone
Enough height.
Audio frequency apparatus phenomenon of uttering long and high-pitched sounds has very big influence to the sound quality of equipment audio, and uttering long and high-pitched sounds can be such that sound quality sharply declines,
It affects user experience, is that system formation positive feedback generates due to uttering long and high-pitched sounds, system loading can be made to become larger, or even can damage
Bad equipment.
Since the acoustic feedback environment for phenomenon generation of uttering long and high-pitched sounds is with the relative position of two equipment, speaker volume and microphone
Pickup change of sensitivity, what acoustic feedback environment under different conditions generated utter long and high-pitched sounds frequency point and bandwidth difference, it is accurate to be difficult
The model of acoustic feedback environment is established, and acoustic feedback is the wheat for passing to another equipment from the loudspeaker of an equipment by space
Gram wind, it is impossible to while the speaker output signal an of equipment and the microphone input signal of another equipment are got, because
This almost impossible functional relation for estimating two paths of signals.
Summary of the invention
Aiming at the shortcomings in the prior art, the present invention provides a kind of method of speech processing that inhibition audio frequency apparatus is uttered long and high-pitched sounds.
In order to solve the above technical problems, the technical solution used in the present invention is:
A kind of method of speech processing for inhibiting audio frequency apparatus to utter long and high-pitched sounds, comprising the following specific steps
Step 101, it pre-processes voice data: obtaining transmitting terminal or receiving end voice data, filter out dry other than audio
Disturb signal；
Step 102, speech signal spec-trum is calculated；
Step 103, it extracts feature of uttering long and high-pitched sounds: signature analysis of uttering long and high-pitched sounds being carried out to speech signal spec-trum, whether differentiates voice signal
Generation is uttered long and high-pitched sounds phenomenon, and is accurately positioned the frequency point for signal of uttering long and high-pitched sounds；
Step 104, inhibit signal of uttering long and high-pitched sounds: to uttering long and high-pitched sounds, signal carries out trap processing, inhibits signal of uttering long and high-pitched sounds；
Step 105, restore and export voice signal: being voice signal after trap is handled by frequency-domain transform to time domain, it is defeated
Treated out voice signal.
Optionally, step 101 includes: to sample to transmitting terminal microphone signal, obtains the data of transmitting terminal；To reception
It holds the voice data demodulated to carry out sampling rate conversion, obtains receiving end data；Low-pass filtering is carried out to voice signal, is only retained
The signal of 0-3.4KHz；
Optionally, step 102 includes: that time domain speech signal is transformed into frequency domain using discrete Fourier transform, obtains language
Sound signal frequency spectrum；
Optionally, step 103 includes: that voice band is divided into 0-1KHz frequency range, 1KHz-2KHz frequency range and 2KHz or more
Three subbands of frequency range determine subband where the maximum amplitude frequency point of the speech signal spec-trum；If maximum amplitude frequency point exists
1KHz-2KHz frequency range or 2KHz are to be directly determined as frequency point of uttering long and high-pitched sounds for the maximum amplitude frequency point in super band；If maximum amplitude
Frequency point in 0-1KHz frequency range, calculate actual measurement voice 0-1KHz frequency range in energy spectral density, and in 0-1KHz frequency range just
Normal speech energy spectrum density compares, and judges that actual measurement voice whether there is and utters long and high-pitched sounds.
By adopting the above-described technical solution, the beneficial effects of the present invention are:
The present invention can accurately judge signal of uttering long and high-pitched sounds in real time, and the phenomenon of uttering long and high-pitched sounds for effectively audio frequency apparatus being inhibited to generate promotes language
The sound quality of sound is suitable for audio frequency apparatus transmitting terminal or receiving end.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is flow chart of the invention；
Fig. 2 is the flow chart of step 103 in the embodiment of the present invention 1；
Fig. 3 is voice signal low-frequency range spectrogram of uttering long and high-pitched sounds in the embodiment of the present invention 1；
Fig. 4 is voice signal Mid Frequency spectrogram of uttering long and high-pitched sounds in the embodiment of the present invention 1；
Fig. 5 is voice signal high band spectrogram of uttering long and high-pitched sounds in the embodiment of the present invention 1；
Fig. 6 is the speech signal spec-trum figure restored in the embodiment of the present invention 1.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to Fig.1, a kind of process flow diagram of method of speech processing embodiment for inhibiting audio frequency apparatus to utter long and high-pitched sounds, specifically can be with
Include the following steps:
Step 101, terminal obtains upstream or downstream voice data, pre-processes to voice data.
In the present embodiment, voice data may include ascending voice communicating data and/or downlink voice communicating data, the application
It is not specifically limited.Wherein, ascending voice communicating data may include the collected voice data of microphone of mobile terminal；Under
Row voice communication data are that mobile terminal passes through the data for eating dishes without rice or wine to receive and demodulate.In order to preferably make a whistling sound to voice signal
Analysis is cried, voice signal is pre-processed first, mainly includes low-pass filtering treatment, it, will using FIR low-pass filtering algorithm
The frequency content of 3400Hz or more filters, and reduces interference of the high-frequency signal to analysis of uttering long and high-pitched sounds.
Step 102, FFT processing is carried out to voice signal, obtains speech signal spec-trum.
In the present embodiment, voice signal of uttering long and high-pitched sounds is not obvious in the feature of time domain, is difficult to obtain the feature of uttering long and high-pitched sounds of quantization, and
Signal of uttering long and high-pitched sounds is comparatively obvious in the feature of frequency domain, and the purpose for obtaining the frequency spectrum of voice signal is to obtain quantifiable letter of uttering long and high-pitched sounds
Number spectrum signature, and then analyzing and positioning and inhibition are carried out to frequency point of uttering long and high-pitched sounds.
Step 103, spectrum analysis is carried out to frequency domain speech signal, differentiated with the presence or absence of signal of uttering long and high-pitched sounds in voice signal, and
Determine frequency point frequency of uttering long and high-pitched sounds.
Step 104, trap processing is carried out to signal of uttering long and high-pitched sounds.
In the present embodiment, trap processing is carried out to voice signal of uttering long and high-pitched sounds using trapper, wherein trapper centre frequency is
The frequency point of uttering long and high-pitched sounds, notch filter and gain determine by the actual speech signal intensity, the actual speech signal intensity
Higher, corresponding notch filter is wider, and trap centre frequency gain is smaller.It is maked a whistling sound using notch filter to voice data
Inhibition is made to handle, voice data herein may include ascending voice communicating data and/or downlink voice communicating data, this implementation
Example is without limitation.
Step 105, to treated, frequency domain speech signal carries out IFFT, restores time domain speech signal.
Fig. 2 is a kind of spectrum analysis flow chart for the method for speech processing embodiment for inhibiting audio frequency apparatus to utter long and high-pitched sounds of the present invention.
In the present embodiment, for frequency point of uttering long and high-pitched sounds as the relative position of terminal and volume are different, the frequency point of uttering long and high-pitched sounds of generation is not solid
Determine in a certain range, but full voice frequency band is all likely to occur frequency point of uttering long and high-pitched sounds, and starts to generate and utter long and high-pitched sounds initial stage, signal of uttering long and high-pitched sounds may
There are multiple frequency points, signal of uttering long and high-pitched sounds after aggravation of uttering long and high-pitched sounds can focus in a frequency point ranges, and the frequency point ranges are to utter long and high-pitched sounds
Centered on frequency point, signal energy of uttering long and high-pitched sounds is distributed in certain bandwidth, such as frequency point of uttering long and high-pitched sounds is 2500Hz, bandwidth 200Hz, therefore is maked a whistling sound
Cry signal distributions in 2400Hz-2600Hz frequency range.
Illustratively, to downlink voice communicating data carry out it is anti-utter long and high-pitched sounds handle when, can be first to downlink voice communicating data
Carry out detection of uttering long and high-pitched sounds, judge to exist utter long and high-pitched sounds sound when, an attenuation processing is carried out for uttering long and high-pitched sounds, to reach anti-effect of uttering long and high-pitched sounds.
In some embodiments, under type such as can be used to judge in downlink voice communicating data with the presence or absence of sound of uttering long and high-pitched sounds:
Step 201, entire voice band is artificially divided into 3 subbands, respectively 0-1KHz, 1KHz-2KHz and 2KHz
Three above subband, is referred to as low frequency sub-band, intermediate frequency subband and high-frequency sub-band, and the partitioning standards are that frequency of uttering long and high-pitched sounds is not solid
It is fixed, in fact it could happen that the signal of uttering long and high-pitched sounds in any one of described three subbands or more, and in low frequency sub-band is not easy to identify.
Step 202, the maximum amplitude frequency point of voice signal is found out, and judges that the maximum amplitude frequency point is fallen in described in which
In subband.
Step 203, if the maximum amplitude frequency point cannot directly be determined as frequency point of uttering long and high-pitched sounds in low frequency sub-band, because
Normal speech signals maximum amplitude frequency point needs further to differentiate generally in low frequency sub-band.
When the maximum amplitude frequency point is in low frequency sub-band, low frequency sub-band signal energy spectral density is calculated, when energy spectrum is close
When degree is lower than given threshold, it can determine that the maximum amplitude frequency point is frequency point of uttering long and high-pitched sounds, conversely, then to be normal without voice of uttering long and high-pitched sounds.
Step 204, if the maximum amplitude frequency point is in intermediate frequency subband, it can determine that and be for the maximum amplitude frequency point
It utters long and high-pitched sounds frequency point, and determines that this is uttered long and high-pitched sounds and utter long and high-pitched sounds for intermediate frequency.
Step 205, if the maximum amplitude frequency point is in high-frequency sub-band, it can determine that and be for the maximum amplitude frequency point
It utters long and high-pitched sounds frequency point, and determines that this is uttered long and high-pitched sounds and utter long and high-pitched sounds for high frequency.
Fig. 3 is speech signal spec-trum figure of uttering long and high-pitched sounds under collected different situations, this, which is shown in the figure, respectively falls in three
The frequency spectrum of voice signal of uttering long and high-pitched sounds in subband, the factors such as the position for generation of uttering long and high-pitched sounds and the relative position of terminal and volume are related.
To utter long and high-pitched sounds, treated restores normal speech signal spec-trum figure to Fig. 4, there is the voice for signal of uttering long and high-pitched sounds by institute
State it is a kind of inhibition audio frequency apparatus utter long and high-pitched sounds method of speech processing processing after, voice signal of uttering long and high-pitched sounds is effectively suppressed, voice restore just
Often.
There are two types of a kind of specific implementations of method of speech processing that inhibition audio frequency apparatus is uttered long and high-pitched sounds of the embodiment of the present invention,
One is embedded in the transmitter or receiver of baseband processor；Second is that providing interface in the form of dynamic base for application side tune
With.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is by claim and its equivalent limits.
Claims (4)
1. a kind of method of speech processing for inhibiting audio frequency apparatus to utter long and high-pitched sounds characterized by comprising
Comprising the following specific steps
Step 101, it pre-processes voice data: obtaining transmitting terminal or receiving end voice data, filter out the interference letter other than audio
Number；
Step 102, speech signal spec-trum is calculated；
Step 103, it extracts feature of uttering long and high-pitched sounds: signature analysis of uttering long and high-pitched sounds being carried out to speech signal spec-trum, differentiates whether voice signal generates
It utters long and high-pitched sounds phenomenon, and is accurately positioned the frequency point for signal of uttering long and high-pitched sounds；
Step 104, inhibit signal of uttering long and high-pitched sounds: to uttering long and high-pitched sounds, signal carries out trap processing, inhibits signal of uttering long and high-pitched sounds；
Step 105, restore and export voice signal: being voice signal after trap is handled by frequency-domain transform to time domain, at output
Voice signal after reason.
2. the method for speech processing according to claim 1 for inhibiting audio frequency apparatus to utter long and high-pitched sounds, which is characterized in that step 101 packet
It includes: transmitting terminal microphone signal is sampled, obtain the data of transmitting terminal；The voice data that receiving end demodulates is adopted
The transformation of sample rate obtains receiving end data；Low-pass filtering is carried out to voice signal, only retains the signal of 0-3.4KHz.
3. the method for speech processing according to claim 1 for inhibiting audio frequency apparatus to utter long and high-pitched sounds, which is characterized in that step 102 packet
It includes: time domain speech signal being transformed into frequency domain using discrete Fourier transform, obtains speech signal spec-trum.
4. the method for speech processing according to claim 3 for inhibiting audio frequency apparatus to utter long and high-pitched sounds, which is characterized in that step 103 packet
It includes: voice band being divided into 0-1KHz frequency range, 1KHz-2KHz frequency range and 2KHz with three subbands of super band, determines institute's predicate
Subband where the maximum amplitude frequency point of sound signal frequency spectrum；If maximum amplitude frequency point is in 1KHz-2KHz frequency range or 2KHz or more frequency
In section, the maximum amplitude frequency point is directly determined as frequency point of uttering long and high-pitched sounds；If maximum amplitude frequency point in 0-1KHz frequency range, calculates real
The energy spectral density in voice 0-1KHz frequency range is surveyed, and compared with the normal voice energy spectral density in 0-1KHz frequency range, judgement
Actual measurement voice, which whether there is, utters long and high-pitched sounds.
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| CN110838301A (en) * | 2019-11-20 | 2020-02-25 | 北京雷石天地电子技术有限公司 | Method, device terminal and non-transitory computer readable storage medium for suppressing howling |
| CN112309364A (en) * | 2020-11-04 | 2021-02-02 | 广州市立锐升电子有限公司 | Method, system and chip for realizing DSP multichannel squeal reduction processing |
| CN112565981A (en) * | 2021-02-20 | 2021-03-26 | 深圳市智听科技有限公司 | Howling suppression method, howling suppression device, hearing aid, and storage medium |
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| CN110838301A (en) * | 2019-11-20 | 2020-02-25 | 北京雷石天地电子技术有限公司 | Method, device terminal and non-transitory computer readable storage medium for suppressing howling |
| CN110838301B (en) * | 2019-11-20 | 2022-04-12 | 北京雷石天地电子技术有限公司 | Method, device terminal and non-transitory computer readable storage medium for suppressing howling |
| WO2021139327A1 (en) * | 2020-01-09 | 2021-07-15 | 腾讯科技（深圳）有限公司 | Audio signal processing method, model training method, and related apparatus |
| WO2022068440A1 (en) * | 2020-09-30 | 2022-04-07 | 腾讯科技（深圳）有限公司 | Howling suppression method and apparatus, computer device, and storage medium |
| CN112309364A (en) * | 2020-11-04 | 2021-02-02 | 广州市立锐升电子有限公司 | Method, system and chip for realizing DSP multichannel squeal reduction processing |
| CN112565981A (en) * | 2021-02-20 | 2021-03-26 | 深圳市智听科技有限公司 | Howling suppression method, howling suppression device, hearing aid, and storage medium |
| CN112565981B (en) * | 2021-02-20 | 2021-06-15 | 深圳市智听科技有限公司 | Howling suppression method, howling suppression device, hearing aid, and storage medium |
| WO2022174727A1 (en) * | 2021-02-20 | 2022-08-25 | 深圳市智听科技有限公司 | Howling suppression method and apparatus, hearing aid, and storage medium |
| CN112802492A (en) * | 2021-04-14 | 2021-05-14 | 展讯通信（上海）有限公司 | Method, device, chip and module equipment for inhibiting howling |
| CN112802492B (en) * | 2021-04-14 | 2021-07-27 | 展讯通信（上海）有限公司 | Method, device, chip and module equipment for inhibiting howling |
| WO2022217978A1 (en) * | 2021-04-14 | 2022-10-20 | 展讯通信（上海）有限公司 | Howling suppression method and apparatus, chip, and module device |
| CN113225657A (en) * | 2021-04-16 | 2021-08-06 | 深圳木芯科技有限公司 | Multi-channel squeal suppression method based on double-microphone architecture |
| CN113225657B (en) * | 2021-04-16 | 2022-09-30 | 深圳木芯科技有限公司 | Multi-channel squeal suppression method based on double-microphone architecture |
| CN115881080A (en) * | 2023-03-02 | 2023-03-31 | 全时云商务服务股份有限公司 | Acoustic feedback processing method and device in voice communication system |
| CN115881080B (en) * | 2023-03-02 | 2023-05-26 | 全时云商务服务股份有限公司 | Acoustic feedback processing method and device in voice communication system |
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Application publication date: 20190416 |