CN106453762A - A method and system for processing voice whistlers in an audio system - Google Patents
A method and system for processing voice whistlers in an audio system Download PDFInfo
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- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
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Abstract
The invention discloses a method and system for processing voice whistlers in an audio system. According to the scheme, through real time processing carried out on voice signals in a frequency domain, whether the signals contain effective signals of human sound is analyzed and checked; when no human acoustical signal is detected, a background may contain a relatively large amount of noise or whistlers. After the signals are removed in the frequency domain, time domain transmission is retrieved. According to the scheme, processing is only carried out when noise or voice whistlers exist, and normal conversation quality will not be affected. Processing is added after a sending end performs sound recording and before a receiving end performs sound playing. The hardware or software design of the existing system will not be affected.
Description
Technical field
The present invention relates to the treatment technology that in audio system treatment technology, more particularly to audio system, voice is uttered long and high-pitched sounds.
Background technology
With the development of digital network, numerous mobile phone speech intercom systems are occurred in that：Can be very by cell phone software
Traditional transmitter receiver is easily realized.Transmitting terminal mobile phone is obtained voice signal and is delivered to by data network by Mike and answers
End, answers to hold and plays, by speaker, the acoustical signal for receiving, and such a basic voice inter-speaking system is formed.But
Be in actual application, if conversed indoors or closely, as the speaker for answering end constantly sends sound, with
When also received by the Mike of transmitting terminal, constantly circulation generates the self-excitation of sound, ear-piercing sound of uttering long and high-pitched sounds occurs.This sound of uttering long and high-pitched sounds
Experience effect destruction for system is very serious, it is therefore desirable to a kind of technology that can effectively filter out sound of uttering long and high-pitched sounds.
In existing technology, processing the method uttered long and high-pitched sounds of voice has a lot, such as using sef-adapting filter minimizing gain or
Wave trap；Whether signal center frequency is such as judged in the frequency range of generation of uttering long and high-pitched sounds, if it find that in occurrence frequency of uttering long and high-pitched sounds, then swashing
The specific frequency of work filters filter；Or directly filter specifically, using wave trap, frequency of uttering long and high-pitched sounds.
Mostly traditional audio system treatment technology of uttering long and high-pitched sounds is to process in signal gain, may utter long and high-pitched sounds when detecting
Afterwards, gain is reduced to audio signal, it is to avoid voice system loop positive feedback self-excitation formation occurs and utters long and high-pitched sounds.Reduce the method meeting of gain
While normal voice is affected, so that receiving terminal voice signal is diminished, and do not filtered completely due to uttering long and high-pitched sounds, it would still be possible to may proceed to
Self-excitation generation is more serious to utter long and high-pitched sounds, and treatment effect is unsatisfactory.
The method for directly falling characteristic frequency using trap filters can effectively remove certain and utter long and high-pitched sounds, but with audio frequency
The continuous feedback of system circuit, sound of uttering long and high-pitched sounds can be continually changing, i.e., center frequency is constantly shifted.And use adaptive wave trap
Process, then normal acoustic information may be filtered out, effect is still undesirable.
Content of the invention
Utter long and high-pitched sounds the problems for the treatment of technology for existing audio system, need new audio system to utter long and high-pitched sounds process skill
Art, to improve treatment effect.
Thus, the technical problem to be solved be provide a kind of processing method that in audio system, voice is uttered long and high-pitched sounds and
System, to improve treatment effect of uttering long and high-pitched sounds.
In order to solve above-mentioned technical problem, the processing method that in the audio system that the present invention is provided, voice is uttered long and high-pitched sounds, which passes through
Detection people's sound and feature of the sound in domain of uttering long and high-pitched sounds, it is determined whether sound of uttering long and high-pitched sounds, and it is all to remove which when sound of uttering long and high-pitched sounds occurs
Domain component.
Preferably, whether the processing method is uniform by detecting that voice signal is distributed in people's voice range, is then uniformly
Normal speech signals containing people's sound, are otherwise background noise or sound of uttering long and high-pitched sounds.
Preferably, the processing method is specifically included：In domain, real-time processing is carried out to voice signal, analysis checks voice
Signal whether normal speech signals containing people's sound；When human voice signal is not detected by, it is defined as background noise or utters long and high-pitched sounds
Signal, converts back time-domain transmission after the signal is removed in domain.
Preferably, the processing method passes through strength characteristic of the Inspection and analysis voice signal in people's voice range, determines letter
Whether uniform number it is distributed in people's voice range.
Preferably, the processing method travels through each section of frequency for voice signal per band frequency component in people's voice range
The energy intensity of rate component, when energy powerful in the intensity of advance measurement when count, when counting effective people for reaching advance measurement
When sound is counted, determine that voice signal, for normal speech signals, is left intact；The effective of advance measurement is not reaching to when counting
When voice is counted, the skewness of voice signal is described, is defined as signal of uttering long and high-pitched sounds, domain signal is reset and is processed and be converted back into
Time domain is eliminating signal of uttering long and high-pitched sounds.
Preferably, the position of people's voice range is determined in the processing method by equation below：
Low=(int) (size*1000f*2/rate),
Wherein, low is the position of people's acoustic low-pass, and rate is input audio sample sample rate, and size is sample size.
In order to solve above-mentioned technical problem, the processing system that in the audio system that the present invention is provided, voice is uttered long and high-pitched sounds includes：
FFT module, the FFT module goes to domain for audio sample is carried out fast fourier transform；
Sound detection module, the sound detection module carries out sound detection to the signal for transforming to frequency domain, determines signal
Whether uniform it is distributed in people's voice range；
Acoustic processing module, the acoustic processing module is eliminated to signal according to the testing result of sound detection module
Utter long and high-pitched sounds process；
IFFT module, the IFFT module carries out inverse-Fourier transform by signal to the signal for processing through acoustic processing module
It is converted back to time domain.
Preferably, the sound detection module passes through strength characteristic of the Inspection and analysis voice signal in people's voice range, really
Determine signal be distributed in people's voice range whether uniform.
Preferably, the sound detection module check voice signal is per band frequency component in people's voice range, and will per section
The energy intensity of frequency component and the intensity contrast of advance measurement, count when higher than advance measurement intensity；When counting reach pre-
When the effective voice for first measuring is counted, determine that signal is evenly distributed in people's voice range；Having for measurement in advance is not up to when counting
When effect voice is counted, determine that signal is distributed in people's voice range and concentrate.
Preferably, the acoustic processing module is not processed to the signal being evenly distributed in people's voice range；To in voice
Signal pockety in domain, removes its all domain component.
Preferably, also include initialization module in the processing system, the initialization module is to determine people's voice range
Position.
Relative with existing processing method, the audio system that the present invention is provided processing scheme of uttering long and high-pitched sounds has the advantage that：
1）To being filtered not comprising the audio frequency of effective sound completely, it is to avoid noise and uttering long and high-pitched sounds is passed in phonological loop again
Pass；
2）Any process will not be done to normal audio signal, it is ensured that normal speech signals gain is constant and does not appoint
What frequency and energy loss；
3）Implement simple, easily operation, it is not necessary to which any hardware and software changes, and quickly can be deployed in existing
Voice system；
4）In real practical application, test has ideal uttering long and high-pitched sounds and noise treatment effect；
5）Only when have noise or utter long and high-pitched sounds voice when process, do not interfere with normal talking quality；
6）Interpolation before this programme is after transmitting terminal recording, receiving terminal is played is processed, and does not affect the hardware of existed system or soft
Part is designed.
Description of the drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is process model schematic of uttering long and high-pitched sounds in present example；
Fig. 2 is Processing Algorithm flow chart of uttering long and high-pitched sounds in present example；
Fig. 3 is to increase an audio system model after processing of uttering long and high-pitched sounds in present example；
Fig. 4 is the spectrum signature figure of an audio sample of uttering long and high-pitched sounds without treated radio voice system；
Fig. 5 is one and no utters long and high-pitched sounds the frequency spectrum of audio sample through the utter long and high-pitched sounds radio voice system of processing scheme process of the present invention
Characteristic pattern.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Based on substantial amounts of experiment and creative work, it is found by the applicant that the sound of people has obvious feature in domain：Little
In the band that the low frequency part of 1000hz shows as being evenly distributed（As shown in Figure 5）；And obvious spy of the signal in domain that utter long and high-pitched sounds
Levy：Integrated distribution in a certain band frequency（As shown in Figure 4）；In the case, although can using traditional processing method of uttering long and high-pitched sounds
To suppress the signal of uttering long and high-pitched sounds of characteristic frequency, but in real-time audio system, sound of uttering long and high-pitched sounds may become because suppression is processed
Change, mid frequency of uttering long and high-pitched sounds constantly can be shifted, and at this moment traditional processing method is difficult to reach preferable effect.
For this purpose, the present invention is by detecting people's sound and feature of the sound in domain of uttering long and high-pitched sounds, to determine whether sound of uttering long and high-pitched sounds, when
Sound of uttering long and high-pitched sounds removes all domain components when occurring, thus eliminating sound of uttering long and high-pitched sounds.
For wherein, people's sound, can be by detecting whether voice is uniform in low frequency distribution, all in the detection of the feature in domain
Even, it is the normal speech signals containing people's sound, is otherwise background noise or sound of uttering long and high-pitched sounds.
Scheme is as follows to the process of process that voice in audio system is uttered long and high-pitched sounds accordingly：
In domain, real-time processing is carried out to voice signal, checks voice signal whether containing people's sound by phonetic analysiss
Normal speech signals；
When human voice signal is not detected by, illustrate that background may include more noise or utter long and high-pitched sounds, removing in domain should
Time-domain transmission is converted back after signal.
Whether be distributed in low frequency by detection voice containing people's acoustical signal in Inspection and analysis voice signal in this programme is
No uniformly come carried out, its detailed process is as follows：
1）To audio sample to be detected, carry out fast fourier transform and go to domain；
2）After focusing on conversion, audio sample signal each frequency in the voice frequency range 50hz-1000hz domain is divided
Amount, checks that whether the audio sample signal is distributed in people's voice range uniform, exists especially by Inspection and analysis voice signal here
Strength characteristic in people's voice range, determines with this whether signal is distributed in people's voice range uniform, and process is as follows：
Detect the energy intensity px of each frequency component, and by the energy intensity px of each frequency component and measurement in advance
Intensity p0 is contrasted, and is counted when higher than advance measurement intensity p0；
When the effective voice counting c0 for reaching advance measurement is counted, then sound detection is triggered, audio sample letter is described
Number it is evenly distributed in people's voice range, is the normal speech signals containing people's sound, signal is left intact；When count not
When reaching effective voice of advance measurement c0 is counted, then audio sample signal skewness in people's voice range is described（I.e.
For integrated distribution）, the signal is background noise or sound of uttering long and high-pitched sounds, and all domain components of audio sample signal are reset；
3）Signal after process is changed back to the time domain, is transmitted by existed system or plays.
From the foregoing, it will be observed that originally utter long and high-pitched sounds processing scheme only when have noise or utter long and high-pitched sounds voice when process, do not interfere with positive normal open
Words quality.
Come illustratively below by way of a concrete application example.
Utter long and high-pitched sounds process for voice in above-mentioned audio system in this example, design a kind of voice for audio system
Utter long and high-pitched sounds processing system.
Referring to Fig. 1, which show voice in this example and utters long and high-pitched sounds the composition schematic diagram of processing system.
As seen from the figure, this voice processing system 100 of uttering long and high-pitched sounds mainly includes FFT module 110, sound detection module 120, sound
Processing module 130 and IFFT module 140.
Wherein, FFT module 110, go to domain for pending audio sample is carried out fast fourier transform.
Sound detection module 120, carries out sound detection analysis for the signal to transforming to frequency domain, pending to determine
Whether signal is distributed uniform in people's voice range.
The sound detection module 120 passes through strength characteristic of the pending voice signal of Inspection and analysis in people's voice range, really
Determine signal be distributed in people's voice range whether uniform.
Specifically, audio sample (data []) of this sound detection module 120 after to conversion is all in voice
Frequency component in domain is traveled through, and whether compares each frequency component values (data [i]) more than preset threshold value
(power), meet condition hour counter (count) and Jia one；Finally check whether enumerator (count) is more than preset measured value
(C)；If being more than, judge that signal is evenly distributed in people's voice range；If being less than, judge that signal is distributed collection in people's voice range
In.
Here preset threshold value (power) is the intensity of advance measurement；And preset measured value (C) is advance measurement
Effectively voice is counted.
Acoustic processing module 130, utters long and high-pitched sounds place for carrying out elimination to signal according to the testing result of sound detection module 120
Reason.
If the acoustic processing module 130 receives 120 testing result of sound detection module for being evenly distributed, it is determined that the sound
Frequency sample (data []) is normal voice signal, and which is left intact；If the acoustic processing module 130 receives sound
120 testing result of sound detection module is concentrated for distribution, it is determined that the audio sample (data []) is background noise or letter of uttering long and high-pitched sounds
Number, it is zeroed out operation to all domain components of audio sample (data []).
IFFT module 140, for processing through acoustic processing module 130（Including not processing or to all domain components
It is zeroed out）Signal carry out inverse-Fourier transform and convert signals back to time domain and export.
Utter long and high-pitched sounds the effect of the process of processing system 100 to improve this voice further, also set up further in the system just
Beginningization module, for determining the position of people's voice range in real time.The initialization module is according to input audio sample sample rate and sampling
Size, determines the position (low) of sound detection upper frequency limit (1000hz) i.e. people's acoustic low-pass, thus realizing real-time determination
The position of people's voice range.
Accordingly, the initialization module is realized especially by formula below pattern：
low=(int)(size*1000f*2/rate)；
Wherein, rate is input audio sample sample rate, and size is sample size.
Referring to Fig. 2, which show this voice processing system 100 of uttering long and high-pitched sounds and carries out uttering long and high-pitched sounds the flow chart of process.
As seen from the figure, this voice carry out uttering long and high-pitched sounds flow process of process of processing system 100 of uttering long and high-pitched sounds includes system initialization and utters long and high-pitched sounds
Process two parts.
Initialization：
Input audio sample sample rate (rate) and sample size (size), initialization module passes through formula low=(int)
(size*1000f*2/rate) position (low) of sound detection upper frequency limit (1000hz) i.e. people's acoustic low-pass is calculated.
Utter long and high-pitched sounds process：
FFT module is arrived in input audio sample (data []), and FFT module carries out fast fourier transform to sample and goes to
Domain, and it is input to sound detection module；
All frequencies less than detection upper frequency limit (low) of the sound detection module to the audio sample (data []) after conversion
Rate component is traveled through, and whether is compared component value (data [i]) more than preset threshold value (power), is met condition hour counter
(count) Jia one；
Check whether enumerator (count) is more than preset measured value (C), explanation when meeting condition is normal voice letter
Number, it is left intact, otherwise explanation is background noise or signal of uttering long and high-pitched sounds, to audio sample (data []) clear operation；
Inverse-Fourier transform is done to audio sample (data []), is returned to time domain and export audio sample (data []).
Referring to Fig. 3, which show the sound with processing function of uttering long and high-pitched sounds of the composition of processing system 100 of uttering long and high-pitched sounds based on above-mentioned voice
Display system.The overall audio system model is broadly divided into two parts：Transmitting terminal 200 and receiving terminal 300.
Wherein, transmitting terminal main body 200 is comprising mike and processing unit of uttering long and high-pitched sounds（Uttered long and high-pitched sounds 100 structure of processing system by voice
Become）, then receiving terminal is transferred to by compressed encoding and physical link；
Receiving terminal main body 300 is comprising speaker and processing unit of uttering long and high-pitched sounds（Processing system of being uttered long and high-pitched sounds by voice 100 is constituted）, pass through
After physical link receives the voice signal that transmitting terminal is sent, decompressed and decoding process passed to processing unit of uttering long and high-pitched sounds.
The overall audio system for constituting accordingly can be processed to the sound of uttering long and high-pitched sounds for producing in audio system, greatly improved logical
Words quality.
Here audio system is the audio system of the various sound process that need to carry out uttering long and high-pitched sounds, as an example as mobile phone communication pair
Say system etc..Below by increase voice utter long and high-pitched sounds process mobile phone communication intercom system as a example by, illustratively which carries out voice and utters long and high-pitched sounds
The process of process.
1st, transmitting terminal：Transmitting terminal gets voice PCM signal from mobile phone Mike, and the signal to getting does FFT and turns
The domain of change, checks strength characteristic of the signal in people voice range 50hz-1000hz；The energy for traveling through each band frequency component is strong
Degree, increases when signal intensity is more than default threshold value and counts；When enumerator is not reaching to default threshold value, signal is described
Skewness, it may be determined that be signal of uttering long and high-pitched sounds；Domain signal is reset and is processed and convert back to the time domain signal of uttering long and high-pitched sounds is eliminated, place
Signal after reason is no uttered long and high-pitched sounds signal.
2nd, receiving terminal：After answering the voice signal that end is sent from Network Capture to transmitting terminal, PCM letter is decoded as to signal
Number, and signal is done and the process of transmitting terminal identical；By the nothing after process utter long and high-pitched sounds signal write loudspeaker apparatus broadcasting, you can defeated
Go out no sound of uttering long and high-pitched sounds.
Referring to Fig. 4, which show the spectrum signature of an audio sample of uttering long and high-pitched sounds without treated radio voice system；
Fig. 5 is the spectrum signature of an audio sample of no uttering long and high-pitched sounds through radio voice system；The howl for being provided by contrast, this example
Sound processing scheme is made to have ideal uttering long and high-pitched sounds and noise treatment effect.
Meanwhile, this utter long and high-pitched sounds sound processing scheme application when, interpolation process only after transmitting terminal recording, before receiving terminal is played is
Can, do not affect hardware or the software design of existed system completely.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (11)
1. the processing method that in audio system, voice is uttered long and high-pitched sounds, it is characterised in that the processing method is by detecting people's sound and howl
Sound being in the feature in domain, it is determined whether sound of uttering long and high-pitched sounds, and its all domain component is removed when sound of uttering long and high-pitched sounds occurs.
2. the processing method that in audio system according to claim 1, voice is uttered long and high-pitched sounds, it is characterised in that the processing method
Specifically include：In domain real-time processing carried out to voice signal, analysis checks the voice signal whether normal language containing people's sound
Message number；When human voice signal is not detected by, it is defined as background noise or signal of uttering long and high-pitched sounds, changes after the signal is removed in domain
Back to the time domain is transmitted.
3. the processing method that in audio system according to claim 2, voice is uttered long and high-pitched sounds, it is characterised in that the processing method
Whether uniform by detecting that voice signal is distributed in people's voice range, it is then uniformly the normal speech signals containing people's sound, no
It is then background noise or sound of uttering long and high-pitched sounds.
4. the processing method that in audio system according to claim 3, voice is uttered long and high-pitched sounds, it is characterised in that the processing method
By strength characteristic of the Inspection and analysis voice signal in people's voice range, determine whether signal is distributed in people's voice range uniform.
5. the processing method that in audio system according to claim 4, voice is uttered long and high-pitched sounds, it is characterised in that the processing method
For voice signal per band frequency component in people's voice range, the energy intensity of each band frequency component is traveled through, when energy is powerful
Count when the intensity of advance measurement, when the effective voice counting for reaching advance measurement is counted, determine that voice signal is normal
Voice signal, is left intact；When the effective voice counting for being not reaching to advance measurement is counted, be described dividing for voice signal
Cloth is uneven, is defined as signal of uttering long and high-pitched sounds, and domain signal is reset and is processed and convert back to the time domain to eliminate signal of uttering long and high-pitched sounds.
6. the processing method that in the audio system according to claim 3 or 4 or 5, voice is uttered long and high-pitched sounds, it is characterised in that the place
The position of people's voice range is determined in reason method by equation below：
Low=(int) (size*1000f*2/rate),
Wherein, low is the position of people's acoustic low-pass, and rate is input audio sample sample rate, and size is sample size.
7. the processing system that in audio system, voice is uttered long and high-pitched sounds, it is characterised in that the processing system includes：
FFT module, the FFT module goes to domain for audio sample is carried out fast fourier transform；
Sound detection module, the sound detection module carries out sound detection to the signal for transforming to frequency domain, determines signal in people
In voice range, whether distribution is uniform；
Acoustic processing module, the acoustic processing module carries out elimination according to the testing result of sound detection module to signal and utters long and high-pitched sounds
Process；
IFFT module, the IFFT module carries out inverse-Fourier transform to the signal for processing through acoustic processing module and changes signal
Return to time domain.
8. the processing system that in audio system according to claim 7, voice is uttered long and high-pitched sounds, it is characterised in that the sound detection
Module passes through strength characteristic of the Inspection and analysis voice signal in people's voice range, determines whether signal is distributed in people's voice range equal
Even.
9. the processing system that in audio system according to claim 8, voice is uttered long and high-pitched sounds, it is characterised in that the sound detection
Module check voice signal is per band frequency component in people's voice range, and measures by the energy intensity of every band frequency component and in advance
Intensity contrast, higher than advance measurement intensity when count；When the effective voice counting for reaching advance measurement is counted, letter is determined
Number it is evenly distributed in people's voice range；When the effective voice for counting not up to measurement in advance is counted, determine signal in voice
In domain, distribution is concentrated.
10. the processing system that in audio system according to claim 7, voice is uttered long and high-pitched sounds, it is characterised in that at the sound
Reason module is not processed to the signal being evenly distributed in people's voice range；To signal pockety in people's voice range, move
Except its all domain component.
The processing system that in 11. audio systems according to claim 7, voice is uttered long and high-pitched sounds, it is characterised in that the processing system
Also include initialization module in system, the initialization module is to determine the position of people's voice range.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108053833A (en) * | 2017-11-30 | 2018-05-18 | 广东欧珀移动通信有限公司 | Processing method, device, electronic equipment and the storage medium that voice is uttered long and high-pitched sounds |
| CN108449498A (en) * | 2018-03-12 | 2018-08-24 | 广东欧珀移动通信有限公司 | Voice communication data processing method, device, storage medium and mobile terminal |
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| CN108053833A (en) * | 2017-11-30 | 2018-05-18 | 广东欧珀移动通信有限公司 | Processing method, device, electronic equipment and the storage medium that voice is uttered long and high-pitched sounds |
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| CN108449492A (en) * | 2018-03-12 | 2018-08-24 | 广东欧珀移动通信有限公司 | Voice communication data processing method, device, storage medium and mobile terminal |
| CN108449498B (en) * | 2018-03-12 | 2020-04-17 | Oppo广东移动通信有限公司 | Voice call data processing method and device, storage medium and mobile terminal |
| CN108449492B (en) * | 2018-03-12 | 2020-05-12 | Oppo广东移动通信有限公司 | Voice call data processing method and device, storage medium and mobile terminal |
| CN111294446A (en) * | 2019-03-28 | 2020-06-16 | 紫光展讯通信(惠州)有限公司 | Power supply system circuit of terminal |
| CN111294446B (en) * | 2019-03-28 | 2021-05-18 | 紫光展讯通信(惠州)有限公司 | Power supply system circuit of terminal |
| CN113316075A (en) * | 2021-05-11 | 2021-08-27 | 紫光展锐(重庆)科技有限公司 | Howling detection method and device and electronic equipment |
| CN113316075B (en) * | 2021-05-11 | 2023-02-14 | 紫光展锐(重庆)科技有限公司 | Howling detection method and device and electronic equipment |
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