CN102510418B - Intelligibility of speech method of measurement under noise circumstance and device - Google Patents
Intelligibility of speech method of measurement under noise circumstance and device Download PDFInfo
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Abstract
The present invention relates to the intelligibility of speech method of measurement under noise circumstance and device.Front end of the present invention connects computer, loudspeaker, artitificial ear, communication terminal to be measured respectively; There are multichannel sound card, signals collecting parts, control assembly in described front end, and multiple channel acousto links and connects loudspeaker, and communication terminal to be measured is connected with the signals collecting parts of front end by cable or radio, and control assembly is connecting multi-channel card and signals collecting parts respectively; Described calculator memory contains special noise testing use-case and measuring and calculation program, and computer connects the control assembly in front end.What artificial subjective evaluation of the invention solves over brought wastes time and energy, and different people can draw different result and cannot accurate and objective defect.Noise and the voice signal wanted separate by the present invention effectively, thus provide a measurement mechanism that is effective, objective, the intelligibility of speech of communication terminal exactly and method, ensure that accurately with objective.
Description
Technical field
The present invention relates to the communication technology under the intelligibility of speech, definition, noise, elimination, noise, the intelligibility of speech method of measurement particularly under noise circumstance and device.
Technical background
Voice in a noisy environment mainly concentrate on how to improve intelligibility, and this is for an important indicator of communication terminal audio performance.
Before making the present invention, the objective measurement of the intelligibility of speech in a noisy environment, want the voice heard be aliasing in noise together with, therefore, the voice first noise and wanting must heard are separately.Noise and the voice wanted cannot separate by existing processing method, there is the defect that evaluated error is large.
And some speech processes in a noisy environment, can improve the volume of receiving terminal and regulates the frequency spectrum of receiving terminal voice automatically.Intelligibility directly has influence on the effect of communication terminal, is the important indicator of quality standard in noise communication and recording.If cannot automatically measure, then can only do artificial subjective evaluation, so not only waste time and energy, and different people can draw different results, cannot accurately with objective.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, develop method of measurement and the device of intelligibility under a kind of noise circumstance.
Technical scheme of the present invention is:
Intelligibility of speech measurement mechanism under noise circumstance, its technical characteristics is that front end connects computer, loudspeaker, artitificial ear, communication terminal to be measured respectively; There are multichannel sound card, signals collecting parts, control assembly in described front end, and multiple channel acousto links and connects loudspeaker, and communication terminal to be measured is connected with the signals collecting parts of front end by cable or radio, and control assembly is connecting multi-channel card and signals collecting parts respectively; Described calculator memory contains special noise testing use-case and measuring and calculation program, and computer connects the control assembly in front end.
Another technical scheme of the present invention is:
Intelligibility of speech method of measurement under noise circumstance, its major technique step is:
(1) the special noise testing use-case stored in computer is sent to the multichannel sound card of front end by the control assembly of front end;
(2) special noise testing use-case is sent in loudspeaker through multichannel sound card;
(3) control assembly in front end controls the broadcasting sequential of special noise testing use-case on loudspeaker and volume;
(4) in front end, signals collecting parts record the Received signal strength of the standard microphone in artitificial ear;
(5) this signal is delivered to computer by the control assembly of front end;
(6) computer carries out analytical calculation, process to this signal, thus measures the intelligibility under ambient noise wanting voice.
Advantage of the present invention and effect are effectively noise and the voice signal wanted to be separated, thus a measurement mechanism that is effective, objective, the intelligibility of speech of communication terminal exactly and method are provided, the method of the intelligibility of speech of subjective evaluation communication terminal artificial before solving like this, ensure that accurately with objective.
Other concrete advantages of the present invention and effect will go on to say below.
Accompanying drawing explanation
Fig. 1---general structure block diagram of the present invention.
Fig. 2---in the present invention, test case is play and intelligibility calculation process schematic diagram.
The broadcasting of Fig. 3---ambient noise test case of the present invention and remote signaling and the recording order schematic diagram of artitificial ear Received signal strength.
The another kind of implementation method schematic diagram of Fig. 4---the broadcasting of ambient noise test case of the present invention and remote signaling and the recording of artitificial ear Received signal strength.
The calculating schematic diagram of Fig. 5---the intelligibility of speech of the present invention.
Embodiment
Technical thought of the present invention is:
The test case of ambient noise comprises different noise signals, as the noise etc. of restaurant, subway, railway station, automobile, road.The test case of remote signaling comprises the sound of speech of the other end user of communication, has boy student, schoolgirl and different language etc.The test case of ambient noise plays back the ambient noise as communication terminal to be measured by player and loudspeaker power amplifier from loudspeaker under the control of the computer in acoustical laboratory.The test case of remote signaling is also send to communication terminal to be measured by transmission and transmitter under the unified control of computer.The signal that acoustics artitificial ear receives is sent into computer and is carried out signal time alignment, then calculates the intelligibility of voice.
Here illustrates.
As shown in Figure 1:
The measurement mechanism of the intelligibility of speech mainly contains loudspeaker, front end hardware, (acoustics) artitificial ear and (software of rear end) computer composition playing noise.
Loudspeaker are used to broadcasting noise, and in order to the various noises in simulated environment, the hardware of front end is mainly used for the broadcasting sound of system and the collection of recording and control and signal; Specifically, front end comprises multichannel sound card, signals collecting, control assembly, and artitificial ear is used for the voice that analog subscriber listens communication terminal receiver to be measured.The running software of rear end in a computer, for generation of, On-board test use-case, and the intelligibility of analytical calculation voice under ambient noise.
A concrete example is:
8 loudspeaker circumferentially arrange according to difference 45 degree, and each loudspeaker have a lead-in wire, are connected respectively to multichannel sound card and the control assembly of the front end of device.Various noise testing use-cases in computer, by multichannel sound card, the control assembly of front end, loudspeaker are play corresponding noise to simulate various ambient noise.Here loudspeaker as required, can play noise one by one, and the loudspeaker combination also simultaneously can playing noise or various quantity gets up to play noise.
The quantity of loudspeaker and put arrangement mode and be not limited to above example, can have other form.
As shown in Figure 2:
The flow process that the concrete broadcasting of test case and intelligibility calculate.
1) control assembly, in front end send control signal to control designed special noise testing use-case broadcasting sequential, play passage and broadcast sound volume.
2), multichannel sound card in front end of designed noise and the test case of far-end speech and the built-in or external power amplifier of loudspeaker, play out, as ambient noise in loudspeaker; The test case of ambient noise comprises different noise signals, as the noise etc. of restaurant, subway, railway station, automobile, road; The test case of remote signaling comprises the sound of speech of the other end user of communication, has boy student, schoolgirl and different language etc.
3), communication terminal to be measured sends the voice of far-end by its loudspeaker or receiver.
4), the standard microphone in artitificial ear receives voice and the ambient noise of far-end, is sent it back in computer by the control assembly of front end.
5), computer carries out time unifying, analytical calculation, thus draws tested speech intelligibility.
As shown in Figure 3:
The recording order of the ambient noise test case in the present invention and the broadcasting of remote signaling and artitificial ear Received signal strength.
1), computer first plays one section of ambient noise by the loudspeaker putting noise, does not now play any other sound;
2) standard microphone, in artitificial ear receives sound and is sent in computer by front end;
3), then play duplicate ambient noise by noise loudspeaker again, also play the far-end sound of communication terminal to be measured simultaneously by the loudspeaker of determinand or receiver;
4) standard microphone, in artitificial ear is received sound and is sent in computer by front end
As shown in Figure 4:
The another kind of implementation method of the broadcasting of ambient noise test case and remote signaling and the recording of artitificial ear Received signal strength in the present invention:
1), the sequential arrangement of all broadcastings is good, that is: arrange one section of ambient noise in noise testing vector, then one section of 0 value, more then another section of same noise;
2), the test vector of remote signaling first puts one section of 0 value, and then talks with coordinating placement one section of far-end the time of second segment ambient noise;
3), then again by noise loudspeaker playing environment noise, the far-end sound of communication terminal to be measured is play by the loudspeaker of determinand or receiver;
4) standard microphone, in artitificial ear is received sound and is sent in computer by front end.
Shown in Fig. 5:
The calculating of the intelligibility of speech in the present invention.
1), the signal transmitted from the standard microphone artitificial ear obtained, carries out dividing, cutting, and main object is separated with the signal of voice aliasing pure noise and noise;
2), first time time unifying is carried out, to eliminate the time delay that broadcasting, transmission and recording etc. bring;
3), using the signal of pure noise as with reference to signal, by adaptive-filtering, the noise in aliasing signal is eliminated, only retain the voice signal of far-end, namely from the voice signal that the receiver of communication terminal to be measured obtains;
4), psychoacoustic model and masking curve is set up with pure noise;
5), calculate each frequency band power by the far-end speech signal obtained above, and compare with masking curve, calculate the snr value of each frequency range;
6), then according to the signal to noise ratio of each frequency range, intelligibility is calculated.
Processing method of the present invention, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5:
1. in computer, store the test case such as various noise signal and far-end sound of speech;
2. the test case stored in computer is sent to the multichannel sound card of front end;
3. the broadcasting sequential of the control assembly control noises test case in front end on loudspeaker and volume;
4. test case is sent in multiple loudspeaker by the multichannel sound card of front end respectively, and an example is employing 8 loudspeaker, circumferentially equiangularly arranged;
5. determinand is arranged in the middle of 8 loudspeaker, and on artitificial ear or above, is connected with front end by cable or radio;
6. computer first plays one section of ambient noise by 8 loudspeaker, does not now play any other sound;
7. the standard microphone in artitificial ear receives sound and is sent in computer by front end;
8. then or play duplicate ambient noise by 8 loudspeaker, also play the far-end sound of communication terminal to be measured by the loudspeaker of determinand or receiver simultaneously;
9. the standard microphone in artitificial ear receives sound and is sent in computer by front end again;
Above step 6) to 9) also can with 10) to 12) realize
The sequential arrangement of all broadcastings is good 10., that is: arrange one section of ambient noise in noise testing vector, then one section of 0 value, more then another section of same noise;
The test vector of 11. remote signalings first puts one section of 0 value, and then talks with coordinating placement one section of far-end the time of second segment ambient noise;
12. then again by 8 noise loudspeaker playing environment noises, are play the far-end sound of communication terminal to be measured by the loudspeaker of determinand or receiver;
Standard microphone in 13. artitificial ears receives sound and is sent in computer by front end;
This signal is carried out time unifying, analytical calculation by 14. in a computer, thus draws the intelligibility of speech.
Claims (4)
1. the intelligibility of speech measurement mechanism under noise circumstance, is characterized in that front end connects computer, loudspeaker, artitificial ear, communication terminal to be measured respectively; There are multichannel sound card, signals collecting parts, control assembly in described front end, multiple channel acousto links and connects loudspeaker, communication terminal to be measured is connected with the signals collecting parts of front end by cable or radio, control assembly is connecting multi-channel card and signals collecting parts respectively, and computer connects the control assembly in front end; Described calculator memory contains special noise testing use-case and measuring and calculation program, and its testing procedure is as follows:
(1) various noise signal and far-end sound of speech test case is stored in computer;
(2) test case stored in computer is sent to the multichannel sound card of front end;
(3) the broadcasting sequential of the control assembly control noises test case in front end on loudspeaker and volume;
(4) test case is sent in 8 loudspeaker by the multichannel sound card of front end respectively, and 8 loudspeaker are circumferentially equiangularly arranged;
(5) determinand is arranged in the middle of 8 loudspeaker, and on artitificial ear or above, is connected with front end by cable or radio;
(6) computer first plays one section of ambient noise by 8 loudspeaker, does not now play any other sound;
(7) standard microphone in artitificial ear receives sound and is sent in computer by front end;
(8) then or play duplicate ambient noise by 8 loudspeaker, also play the far-end sound of communication terminal to be measured by the loudspeaker of determinand or receiver simultaneously;
(9) standard microphone in artitificial ear receives sound and is sent in computer by front end again;
(10) this signal is carried out time unifying, analytical calculation in a computer, thus draw the intelligibility of speech, namely
1), the signal transmitted from the standard microphone artitificial ear obtained, carries out dividing, cutting, and main object is separated with the signal of voice aliasing pure noise and noise;
2), first time time unifying is carried out, to eliminate broadcasting, transmission and the time delay brought of recording;
3), using the signal of pure noise as with reference to signal, by adaptive-filtering, the noise in aliasing signal is eliminated, only retain the voice signal of far-end, namely from the voice signal that the receiver of communication terminal to be measured obtains;
4), psychoacoustic model and masking curve is set up with pure noise;
5), calculate each frequency band power by the far-end speech signal obtained above, and compare with masking curve, calculate the snr value of each frequency range;
6), then according to the signal to noise ratio of each frequency range, intelligibility is calculated.
2. the intelligibility of speech measurement mechanism under noise circumstance according to claim 1, is characterized in that communication terminal to be measured is arranged in the middle of multiple loudspeaker and artitificial ear.
3. the intelligibility of speech measurement mechanism under noise circumstance according to claim 1, is characterized in that loudspeaker have 8, circumferentially arranges according to difference 45 degree, and each loudspeaker have a lead-in wire, are connected respectively to multichannel sound card, the control assembly of the front end of device.
4. the intelligibility of speech method of measurement under noise circumstance, its step is:
(1) the special noise testing use-case stored in computer is sent to the multichannel sound card of front end by the control assembly of front end;
(2) special noise testing use-case is sent in loudspeaker through multichannel sound card;
(3) control assembly in front end controls the broadcasting sequential of special noise testing use-case on loudspeaker and volume;
(4) in front end, signals collecting parts record the Received signal strength of the standard microphone in artitificial ear;
(5) this signal is delivered to computer by the control assembly of front end;
(6) computer carries out analytical calculation, process to this signal, thus measures the intelligibility under ambient noise wanting voice; Its analytical calculation, treatment step are as follows:
(6-1) various noise signal and far-end sound of speech test case is stored in computer;
(6-2) test case stored in computer is sent to the multichannel sound card of front end;
(6-3) the broadcasting sequential of the control assembly control noises test case in front end on loudspeaker and volume;
(6-4) test case is sent in 8 loudspeaker by the multichannel sound card of front end respectively, and 8 loudspeaker are circumferentially equiangularly arranged;
(6-5) determinand is arranged in the middle of 8 loudspeaker, and on artitificial ear or above, is connected with front end by cable or radio;
(6-6) computer first plays one section of ambient noise by 8 loudspeaker, does not now play any other sound;
(6-7) standard microphone in artitificial ear receives sound and is sent in computer by front end;
(6-8) then or play duplicate ambient noise by 8 loudspeaker, also play the far-end sound of communication terminal to be measured by the loudspeaker of determinand or receiver simultaneously;
(6-9) standard microphone in artitificial ear receives sound and is sent in computer by front end again;
(6-10) this signal is carried out time unifying, analytical calculation in a computer, thus draw the intelligibility of speech, namely
1), the signal transmitted from the standard microphone artitificial ear obtained, carries out dividing, cutting, and main object is separated with the signal of voice aliasing pure noise and noise;
2), first time time unifying is carried out, to eliminate broadcasting, transmission and the time delay brought of recording;
3), using the signal of pure noise as with reference to signal, by adaptive-filtering, the noise in aliasing signal is eliminated, only retain the voice signal of far-end, namely from the voice signal that the receiver of communication terminal to be measured obtains;
4), psychoacoustic model and masking curve is set up with pure noise;
5), calculate each frequency band power by the far-end speech signal obtained above, and compare with masking curve, calculate the snr value of each frequency range;
6), then according to the signal to noise ratio of each frequency range, intelligibility is calculated.
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| CN103118205A (en) * | 2013-01-08 | 2013-05-22 | 声科科技(南京)有限公司 | Method and device for testing call performance of downlink receiving terminal in noisy environment |
| CN103400585A (en) * | 2013-07-24 | 2013-11-20 | 南京声准科技有限公司 | Device and method for evaluating objective performances of residual noise subjected to denoising |
| CN106501556A (en) * | 2015-09-06 | 2017-03-15 | 福禄克公司 | Measurement apparatus and measuring method |
| CN105280195B (en) | 2015-11-04 | 2018-12-28 | 腾讯科技（深圳）有限公司 | The processing method and processing device of voice signal |
| DK3220661T3 (en) * | 2016-03-15 | 2020-01-20 | Oticon As | PROCEDURE FOR PREDICTING THE UNDERSTANDING OF NOISE AND / OR IMPROVED SPEECH AND A BINAURAL HEARING SYSTEM |
| CN105869656B (en) * | 2016-06-01 | 2019-12-31 | 南方科技大学 | Method and device for determining definition of voice signal |
| WO2019061055A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳传音通讯有限公司 | Testing method and system for electronic device |
| CN108364643A (en) * | 2017-12-29 | 2018-08-03 | 潍坊歌尔电子有限公司 | The test method and system of auditory localization performance for smart machine |
| CN108281140A (en) * | 2017-12-29 | 2018-07-13 | 潍坊歌尔电子有限公司 | The test method and system of smart machine noise removing performance |
| CN112086097B (en) * | 2020-07-29 | 2023-11-10 | 广东美的白色家电技术创新中心有限公司 | Instruction response method of voice terminal, electronic equipment and computer storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101268624B (en) * | 2005-09-20 | 2011-07-06 | 艾利森电话股份有限公司 | Method and test signal for measuring speech intelligibility |
| CN102208190A (en) * | 2011-05-06 | 2011-10-05 | 声科科技(南京)有限公司 | Measurement method and device for inhibiting unstable noise equipment convergence time |
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| US8392194B2 (en) * | 2008-10-15 | 2013-03-05 | The Boeing Company | System and method for machine-based determination of speech intelligibility in an aircraft during flight operations |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101268624B (en) * | 2005-09-20 | 2011-07-06 | 艾利森电话股份有限公司 | Method and test signal for measuring speech intelligibility |
| CN102208190A (en) * | 2011-05-06 | 2011-10-05 | 声科科技(南京)有限公司 | Measurement method and device for inhibiting unstable noise equipment convergence time |
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