CN109671445A - A kind of suppressing method that audio system sound is uttered long and high-pitched sounds - Google Patents
A kind of suppressing method that audio system sound is uttered long and high-pitched sounds Download PDFInfo
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- CN109671445A CN109671445A CN201811625456.1A CN201811625456A CN109671445A CN 109671445 A CN109671445 A CN 109671445A CN 201811625456 A CN201811625456 A CN 201811625456A CN 109671445 A CN109671445 A CN 109671445A
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- 230000005236 sound signal Effects 0.000 claims abstract description 20
- 238000001228 spectrum Methods 0.000 claims abstract description 16
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- 239000000284 extract Substances 0.000 claims abstract description 5
- 238000011156 evaluation Methods 0.000 claims description 9
- 238000009432 framing Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
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- 230000000694 effects Effects 0.000 claims description 3
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- 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
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- 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
- 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
- G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- 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
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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Abstract
The present invention relates to voice-frequency telephony fields to include the following steps more particularly, to a kind of suppressing method that audio system sound is uttered long and high-pitched sounds；Audio signal is transformed into frequency domain from time domain, and is counted according to the range value of each component of audible spectrum by S1；S2 sets the empirical value A and continuous time B that utters long and high-pitched sounds that utters long and high-pitched sounds；S3, creates and finds the aray variable count of storage statistical data, and obtains maximum value max；S4 extracts one of numerical value as bottom in aray variable count；S5 obtains howling index p rob by bottom divided by the maximum value max in S3；S6, when howling index p rob, which is greater than, utters long and high-pitched sounds empirical value A, direct output signal, when howling index p rob, which is less than, utters long and high-pitched sounds empirical value A, sound clip in short-term is carried out to audio signal to judge, it exports after directly being deleted if belonging to sound clip in short-term, is exported after being filtered by trapper if being not belonging to sound clip in short-term.
Description
Technical field
The present invention relates to voice-frequency telephony fields, more particularly, to a kind of suppressing method that audio system sound is uttered long and high-pitched sounds.
Background technique
Currently, intercom or phone have been widely applied in daily life, and the speech quality of intercommunication
It is the biggest factor of influence user experience, and in the various indexs of assessment speech quality, uttering long and high-pitched sounds is one of great index, so
Chauvent's criterion is audio-video intercom system urgent problem to be solved.
Wherein, sound is uttered long and high-pitched sounds the most common problem in voice communication or voice conferencing that occurs from, it often makes intercommunication
Significant decline occurs for the sound collection performance of machine microphone, system can be made to become unstable in extreme circumstances, uttered long and high-pitched sounds,
Currently, general solution is started with from the configuration of the microphone parameters of hardware layer, or the biography of balanced device is added in amplifier
System method is usually inconvenient for operation, and ineffective, in addition, phase modulation and gain reduction method commonly used in the trade is to compare
Flexible chauvent's criterion method, but be difficult to obtain between the loss of real-time, public address gain raising and sound quality flat well
Weighing apparatus, and be mostly to be detected and handled after generation of uttering long and high-pitched sounds, influence the subjective auditory perception of user.
It is therefore proposed that a kind of suppressing method that the audio system sound to solve the above problems is uttered long and high-pitched sounds is actually necessary.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above (deficiency), provides a kind of audio system sound
The suppressing method uttered long and high-pitched sounds.
In order to solve the above technical problems, technical scheme is as follows: a kind of inhibition side that audio system sound is uttered long and high-pitched sounds
Method includes the following steps；
Audio signal is transformed into frequency domain from time domain, and is united according to the range value of each component of audible spectrum by S1
Meter；
S2 sets the empirical value A and continuous time B that utters long and high-pitched sounds that utters long and high-pitched sounds；
S3, creates and finds the aray variable count of storage statistical data, and obtains maximum value max；
S4 extracts one of numerical value as bottom in aray variable count；
S5 obtains howling index p rob by bottom divided by the maximum value max in S3；
S6, when howling index p rob, which is greater than, utters long and high-pitched sounds empirical value A, direct output signal, as howling index p rob
Less than utter long and high-pitched sounds empirical value A when, to audio signal carry out in short-term sound clip judge, directly deleted if belonging to sound clip in short-term
It exports after removing, is exported after being filtered if being not belonging to sound clip in short-term by trapper,
It is further, further comprising the steps of in the step S1,
S11 carries out sub-frame processing after handling audio signal plus Hanning window；
S12, if the audio signal after framing is mute, directly progress sound clip judgement in short-term, if the audio after framing
Signal be not it is mute, audio signal is transformed into frequency domain from time domain；
S13 counts the range value of each component of audible spectrum.
It is further, further comprising the steps of in the step S3,
S31 creates the aray variable count of storage statistical data；
S32 extracts the maximum value max of aray variable count.
It is further, further comprising the steps of in the step S4,
S41 arranges numerical value from small to large；
S42 counts 80 percent data distribution in certain numerical value hereinafter, this numerical value is as bottom.
It is further, further comprising the steps of in the step S6,
S61 is deleted and the processed sound of trapper carries out evaluation of uttering long and high-pitched sounds by LSD effect assessment of uttering long and high-pitched sounds to direct；
S62 turns empirical value A down if not meeting evaluation, if meeting evaluation, signal is directly exported.
Further, the value range of the empirical value A is 0.01-0.2.
Further, the value range of the continuous time B that utters long and high-pitched sounds is 200-400 milliseconds.
Compared with prior art, the beneficial effect of technical solution of the present invention is: the invention howl short for energy duration
The method for making sound bite carry out unified erasing, is to overcome phase shift frequency modulation to a kind of effective ways of traditional chauvent's criterion
It the shortcomings that preparation method and gain reduction method, can be realized real-time processing, while greatly improving system gain, lesser sound brought to lose
Very, and hardware cost is low.
Detailed description of the invention
Fig. 1 is the suppressing method flow chart that sound intermediate frequency system sounds of the present invention are uttered long and high-pitched sounds.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, be also possible to be indirectly connected with by intermediary, it may be said that two
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of suppressing method that audio system sound is uttered long and high-pitched sounds, includes the following steps；S1, by audio signal from
Time domain is transformed into frequency domain, and is counted according to the range value of each component of audible spectrum；S2 sets the empirical value A that utters long and high-pitched sounds
With the continuous time B that utters long and high-pitched sounds；S3, creates and finds the aray variable count of storage statistical data, and obtains maximum value max；S4,
In aray variable count, one of numerical value is extracted as bottom；S5, by bottom divided by the maximum value in S3
Max obtains howling index p rob；S6, when howling index p rob, which is greater than, utters long and high-pitched sounds empirical value A, direct output signal, when
Howling index p rob be less than utter long and high-pitched sounds empirical value A when, to audio signal carry out in short-term sound clip judge, if belonging to burst sound
Tablet section exports after then directly deleting, and exports after being filtered if being not belonging to sound clip in short-term by trapper,
In the present invention, further comprising the steps of, S11 in step S1 divides after handling audio signal plus Hanning window
Frame processing；S12, if the audio signal after framing is mute, directly progress sound clip judgement in short-term, if the audio after framing is believed
Number be not it is mute, audio signal is transformed into frequency domain from time domain；S13 unites to the range value of each component of audible spectrum
Meter, and further comprising the steps of in step s3, S31, create the aray variable count of storage statistical data；S32 is extracted
The maximum value max of aray variable count.Further comprising the steps of in step s 4, S41 arranges numerical value from small to large；
S42 counts 80 percent data distribution in certain numerical value hereinafter, this numerical value is as bottom.And in step s 6 also
Include the following steps, S61, is deleted and the processed sound of trapper utter long and high-pitched sounds commenting by LSD effect assessment of uttering long and high-pitched sounds to direct
Valence；S62 turns empirical value A down if not meeting evaluation, if meeting evaluation, signal is directly exported, in the present invention, experience threshold
The value range of value A is 0.01-0.2, and the value range for the continuous time B that utters long and high-pitched sounds is 200-400 milliseconds.
In the present embodiment, after by audio signal by adding Hanning window to handle, made using traditional Fast Fourier Transform (FFT)
Audio signal is transformed into frequency domain from time domain, is then counted further according to the range value of each component of frequency spectrum, in the present invention,
It is counted using the spectrum amplitude value of 64 frequency points, quadratic sum first is carried out to the real and imaginary parts on each frequency point and obtains depanning,
It is reduced again divided by 1000, formula is as follows:
After being reduced divided by 1000, the numberical range of magn can be made to control within the scope of less than 2500, in this way
Operand can be reduced, more convenient for the statistics of data concentrations, then 64 frequency spectrum datas are counted, due to every number
According to numberical range between 0-2500, for these data, creation can store the aray variable count of 2500 data
[i] index of array (i expression) carrys out storage statistical data, traverses to 64 data, the values of each data can and array
This corresponding count [i] numerical value of the corresponding of some index value i of variable count is incremented by 1. as a statistical variable automatically
After having traversed, the maximum value of count aray variable is found.Index value corresponding to this maximum value be 64 frequency spectrum datas most
Big value max. can be concentrated in some frequency point in view of the energy frequency spectrum for audio of uttering long and high-pitched sounds, from small to large from count aray variable
Numerical value in count 80 percent data distribution numerical value hereinafter, this numerical value is denoted as bottom, removed with bottom
It with regard to explanation is compared a possibility that uttering long and high-pitched sounds if prob is sufficiently small with the maximum value max of front, i.e. prob=bottom/max
Greatly, we can determine an empirical value A=0.1.
In the time domain of audio, the audio power of every frame is judged, when being greater than some empirical value, it can be determined that
The frame has sound, otherwise judges the frame to be mute.Due in having the sound clip uttered long and high-pitched sounds, there is the company for segment of partially uttering long and high-pitched sounds
The continuous time is less than 300 milliseconds, in normal person's one's voice in speech segment, continuously speaks the time, typically more than 300 milliseconds
's.Then along with the prob index of front can utter long and high-pitched sounds to judge whether the sound bite less than 300 milliseconds belongs to, if
Belong to, directly wipe this partial data, for the sound bite more than 300 milliseconds, utters long and high-pitched sounds if be judged as by prob index,
In order to avoid manslaughtering normal sound, it is not possible to directly wipe, but use common notch filter in industry, in frequency point of uttering long and high-pitched sounds
Place carries out notch filter processing, it is ensured that normal sound targetedly wipes the spectrum component uttered long and high-pitched sounds while reservation
It removes.
Logarithmic spectrum distance be it is a kind of based on spectrum distance from evaluation method, be mainly used for evaluate voice enhancement algorithm in enhance language
Sound and the average log spectrum distance of raw tone are from formula is as follows.
Wherein, X (k, l) withThe Fourier in short-term for respectively indicating raw tone and tested speech changes, and N is frame
Long, J is frame number, and the Short Time Fourier Transform Hanning window of overlapping 60%, the value of frame length 10ms, LSD are smaller, illustrate raw tone
Closer with tested speech, i.e., voice quality is better, and be arranged an empirical value 0.1. when the value of LSD is greater than 0.1 here,
Above-mentioned prob is just turned down to utter long and high-pitched sounds judge index.
In figure, description positional relationship only for illustration, should not be understood as the limitation to this patent；Obviously, this hair
Bright the above embodiment is merely an example for clearly illustrating the present invention, and is not to embodiments of the present invention
It limits.For those of ordinary skill in the art, other different forms can also be made on the basis of the above description
Variation or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the spirit and principles in the present invention it
Any modifications, equivalent replacements, and improvements made by interior etc., should all be included in the scope of protection of the claims of the present invention.
Claims (7)
1. a kind of suppressing method that audio system sound is uttered long and high-pitched sounds, which is characterized in that include the following steps；
Audio signal is transformed into frequency domain from time domain, and is counted according to the range value of each component of audible spectrum by S1；
S2 sets the empirical value A and continuous time B that utters long and high-pitched sounds that utters long and high-pitched sounds；
S3, creates and finds the aray variable count of storage statistical data, and obtains maximum value max；
S4 extracts one of numerical value as bottom in aray variable count；
S5 obtains howling index p rob by bottom divided by the maximum value max in S3；
S6, when howling index p rob, which is greater than, utters long and high-pitched sounds empirical value A, direct output signal, when howling index p rob is less than
Utter long and high-pitched sounds empirical value A when, to audio signal carry out in short-term sound clip judge, if belonging to sound clip in short-term directly delete after
Output exports after being filtered if being not belonging to sound clip in short-term by trapper.
2. the suppressing method that audio system sound according to claim 1 is uttered long and high-pitched sounds, which is characterized in that in the step S1 also
Include the following steps,
S11 carries out sub-frame processing after handling audio signal plus Hanning window；
S12, if the audio signal after framing is mute, directly progress sound clip judgement in short-term, if the audio signal after framing
To be mute, audio signal is transformed into frequency domain from time domain；
S13 counts the range value of each component of audible spectrum.
3. the suppressing method that audio system sound according to claim 1 is uttered long and high-pitched sounds, which is characterized in that in the step S3 also
Include the following steps,
S31 creates the aray variable count of storage statistical data；
S32 extracts the maximum value max of aray variable count.
4. the suppressing method that audio system sound according to claim 1 is uttered long and high-pitched sounds, which is characterized in that in the step S4 also
Include the following steps,
S41 arranges numerical value from small to large；
S42 counts 80 percent data distribution in certain numerical value hereinafter, this numerical value is as bottom.
5. the suppressing method that audio system sound according to claim 1 is uttered long and high-pitched sounds, which is characterized in that in the step S6 also
Include the following steps,
S61 is deleted and the processed sound of trapper carries out evaluation of uttering long and high-pitched sounds by LSD effect assessment of uttering long and high-pitched sounds to direct；
S62 turns empirical value A down if not meeting evaluation, if meeting evaluation, signal is directly exported.
6. the suppressing method that audio system sound according to claim 1 is uttered long and high-pitched sounds, which is characterized in that the empirical value A
Value range be 0.01-0.2.
7. the suppressing method that audio system sound according to claim 1 is uttered long and high-pitched sounds, which is characterized in that the consecutive hours of uttering long and high-pitched sounds
Between B value range be 200-400 milliseconds.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110708651A (en) * | 2019-09-25 | 2020-01-17 | 天津大学 | Hearing aid squeal detection and suppression method and device based on segmented trapped wave |
| CN111182431A (en) * | 2019-12-27 | 2020-05-19 | 中山大学花都产业科技研究院 | Howling suppression method for conference sound reinforcement system |
| 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 |
| 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 |
| CN113192529A (en) * | 2021-04-28 | 2021-07-30 | 广州繁星互娱信息科技有限公司 | Sound source data repairing method, device, terminal and storage medium |
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| CN110708651A (en) * | 2019-09-25 | 2020-01-17 | 天津大学 | Hearing aid squeal detection and suppression method and device based on segmented trapped wave |
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| CN113192529A (en) * | 2021-04-28 | 2021-07-30 | 广州繁星互娱信息科技有限公司 | Sound source data repairing method, device, terminal and storage medium |
| CN113192529B (en) * | 2021-04-28 | 2024-05-10 | 广州繁星互娱信息科技有限公司 | Sound source data restoration method, device, terminal and storage medium |
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Application publication date: 20190423 |