CN109616132A - A kind of conference system microphone slicing self checking method - Google Patents
A kind of conference system microphone slicing self checking method Download PDFInfo
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- CN109616132A CN109616132A CN201811552489.8A CN201811552489A CN109616132A CN 109616132 A CN109616132 A CN 109616132A CN 201811552489 A CN201811552489 A CN 201811552489A CN 109616132 A CN109616132 A CN 109616132A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 claims description 10
- 230000006854 communication Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004364 calculation method Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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Classifications
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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
-
- 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
- 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
-
- 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
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
Abstract
The invention discloses a kind of conference system microphone slicing self checking methods, mainly include following operation: step a. carries out slicing judgement to the voice data that microphone acquires；Step b. reduces the analog gain of microphone to clipped signal, plays voice document again, judges slicing situation, until being judged as not slicing.The loudspeaker that wherein step a mainly passes through conference system plays one section of voice signal A automatically, this section of voice signal B of its local microphone automatic collection, by calculate voice signal B maximum sound pressure level and setting slicing when critical maximum sound pressure level compare, thus judge voice signal B whether slicing.The method of the present invention improves the accuracy of the correlation calculations of the echo signal in the reference signal and near end signal of echo cancellor, so as to improve the effect of echo cancellor, improves communication process audio quality.
Description
Technical field
The invention belongs to the audio signal processing techniques in Audiotechnica field more particularly to conference communications.
Background technique
With the development of voip technology and voice communication technology, video conferencing system/call voice conference system is increasingly
Mostly it is widely used in all kinds of enterprises.In view of no time, territory restriction, the features such as low-cost, high communication efficiency, enterprise
Industry is increasingly favored in conference system, thus the requirement to voice call quality in its communication process is also higher and higher, so being
Meet enterprise to video/TeleConference Bridge high request, high standard, promote the audio quality in conference process, realize compared with
Good echo processing effect becomes important goal, it may have significance.
Echo cancellation technology is to guarantee audio quality and the smoothly highly important processing technique of speech exchange.In video
In conference system/call voice conference system, if will generate without echo processing and seriously affect the complete of communication effect
Echo.Its generation is played via network transmission by the loudspeaker of local video terminal connection by far-end speech signal
Afterwards, it is acquired together with local sound by local microphone, then distal end, the voice distally to spread out of in this way is returned by network transmission
Signal has been passed back again, and remote speaker will hear the sound of oneself, and here it is the generations of echo.
Currently, more commonly used echo cancel method is the digital signal work before playing remote signaling via loudspeaker
For reference signal, using local pickup microphone acquisition signal as near end signal, then by time in reference signal and near end signal
Acoustical signal carries out correlation calculations and carries out echo cancellor, and final output near end signal leaves after removing wherein echo signal ingredient
Local pickup signal.And when near end signal has slicing or distortion phenomenon, it will affect its correlation calculations, to will affect
Echo processing effect.
The necessary component of loudspeaker and microphone as conference system, loudspeaker realize that high loudness, microphone are realized
Remote pickup range becomes the important goal of VoIP conference system.And when conference system loudspeaker loudness itself it is higher, by
Limitation on device structure or volume, the distance between microphone and loudspeaker very little, microphone is close to source of sound, when equipment carries out
When call, the sound that local microphone collects loudspeaker broadcasting is likely to be breached maximum acoustics input, to generate clipping phenomena；When
When conference system external tv machine or other external sound amplifiers, loudspeaker loudness is higher, when equipment is conversed, local wheat
The sound that gram wind collects loudspeaker broadcasting is likely to be breached maximum acoustics input, to generate clipping phenomena, microphone is caused to acquire
Voice data distortion it is serious, be finally unfavorable for local echo cancellor effect, to influence the audio quality of VoIP voice communication.
Therefore, find a kind of detection microphone acquisition near end signal whether clipping method, and slicing is effectively avoided, to guarantor
The effect of echo cancellor is demonstrate,proved, the audio quality for improving VoIP call is of great significance.
Summary of the invention
It is an object of that present invention to provide a kind of conference system microphone slicing self checking methods, can be to avoid the local Mike of generation
The case where collected voice signal of wind generates slicing reduces the shadow that linear and nonlinear caused by local microphone slicing is distorted
It rings.
In order to achieve the above-mentioned object of the invention, a kind of conference system microphone slicing self checking method of the invention mainly includes
Operate below: step a. carries out slicing judgement to the voice data that microphone acquires;Step b. reduces microphone to clipped signal
Analog gain, play voice document again, judge slicing situation, until being judged as not slicing.
Preferably, voice signal A is played by the loudspeaker that conference system carries automatically in step a.
Preferably, voice signal A is played by the loudspeaker of external public address equipment in step a.
Preferably, while voice signal A is played, local microphone automatic collection obtains voice signal B.
Preferably, step a includes: the maximum sound pressure level for calculating signal B.
Preferably, critical maximum sound pressure level ratio when step a includes: the slicing by the maximum sound pressure level of signal B and setting
After judge voice signal B whether slicing.
Preferably, step b includes: to export the slicing judging result.
Preferably, when it is above-mentioned be judged as not slicing when, output slicing test passes through；When it is above-mentioned be judged as slicing when, output
There is slicing situation.
Preferably, step b include: when it is above-mentioned be judged as slicing when, to clipped signal reduce microphone analog gain.
Preferably, step b includes: after reducing microphone gain, to play voice document again, and judge automatically slicing feelings
Condition, until being judged as not slicing.
A kind of automatic detection microphone provided by the invention whether the method for slicing, not only may determine that a microphone
Slicing situation, and the slicing situation of multiple microphones can be judged simultaneously, which only needs can be fast by control command
Fast automatization judgement, it is simple and effective.
Meanwhile it can be real when the collected voice data of microphone generates slicing using test method provided by the invention
Existing automatic adjusument microphone gain, it is ensured that slicing situation will not be generated, thus linear and nonlinear caused by reducing because of slicing
The influence of distortion improves the accuracy of the correlation calculations of the echo signal in the reference signal and near end signal of echo cancellor,
Improve echo cancellor effect, guarantees communication process audio quality.
Detailed description of the invention
Fig. 1 is microphone slicing self checking method flow chart in the embodiment of the present invention;
Fig. 2 is that microphone slicing test judgement program interface is shown in the specific embodiment of the invention.
Specific embodiment
General principles: the present invention plays one section of voice signal A, local by the loudspeaker of conference system automatically
This section of voice signal B of microphone automatic collection, by calculate voice signal B maximum sound pressure level and setting slicing when
Critical maximum sound pressure level compares, thus judge voice signal B whether slicing.When being judged as not slicing (judgement passes through), if
Without processing in standby system；When being judged as slicing (judgement failure), the simulation that can reduce microphone in device systems automatically increases
Benefit plays voice document again, judges slicing situation, until being judged as not slicing.
In addition, slicing self-checking system of the present invention only need in equipment write-in program, pass through control command open slicing self-test
Function can realize automatic detection slicing situation, and in the case where guaranteeing that loudspeaker loudness is constant, automatic adjusument microphone
Gain, up to no slicing situation, the test method is simple and effective.
The present invention is described in further detail with reference to the accompanying drawings and examples.It can be understood that described at this time
Specific embodiment be used only for explaining the present invention rather than limiting the invention.It also should be noted that for convenience
It describes, the relevant part of the present invention is only illustrated in attached drawing rather than entire infrastructure.
Sentenced automatically with microphone natural seeding from by way of adopting the embodiment of the invention provides a kind of conference system loudspeaker
The voice signal of disconnected microphone acquisition whether the method for slicing, and reduce microphone gain automatically when detecting slicing, realize
Quickly detection conference system acoustic characteristic ensures microphone acquisition voice signal without clipping phenomena.
Fig. 1 is microphone slicing self checking method flow chart in the embodiment of the present invention.As seen from the figure, the specific embodiment of the invention
In, which mainly comprises the steps that
Step S1: conference system loudspeaker is adopted certainly with microphone natural seeding.The loudspeaker carried by conference system or external expansion
The loudspeaker of sound equipment plays one section of voice signal, while local microphone is acquired and saves the voice data of acquisition.
Step S2: calculating and judge microphone acquisition data whether slicing.Program reads the acquisition voice number of preservation automatically
According to and calculating the maximum sound pressure level of its voice signal automatically, and critical maximum sound pressure level when slicing with setting is compared
Compared with, thus judge local microphone acquisition voice signal whether slicing.When calculated maximum sound pressure level is more than or equal to critical
Value, then be judged as slicing；When calculated maximum sound pressure level be less than critical value, then be judged as no slicing, test passes through.
Step S3: slicing processing.When program is judged as not slicing (judgement passes through), without handling in device systems,
Sensitivity of microphone remains as default value；When program is judged as slicing (judgement failure), wheat can be reduced automatically in device systems
The analog gain of gram wind, plays voice document again, judges slicing situation, until being judged as not slicing, guarantees local wheat
Gram collected voice signal of wind will not generate slicing situation.
In the specific embodiment of the invention, conference system microphone slicing self checking method mainly includes two processing stages:
First stage is the judgement of microphone acquisition voice data, and second stage is the processing of slicing situation.
In the first stage in the judgement of microphone acquisition voice data, concrete operations include:
Step S101: playing one section of voice signal A automatically, at this point it is possible to played by the loudspeaker that conference system carries, it can also
To be played by the loudspeaker of external public address equipment.
Step S102: while above-mentioned broadcasting, broadcasting voice signal in local microphone automatic collection step 101,
It is saved after obtaining voice signal B.
Step S103: reading above-mentioned preservation voice signal B by program automatically, while calculating the most loud of voice signal B
It arbitrarily downgrades.
Step S104: critical maximum sound pressure level when slicing with setting compares.In practical applications, it sets herein
Slicing critical maximum sound pressure level can the numerical value as obtained from the voice data that tens equipment of producing line actual test are taken.
Step S105: according to above-mentioned comparing result further judge voice signal B whether slicing.For example, setting slicing faces
Boundary's maximum sound pressure level is that 80dB shows no clipping phenomena then as maximum sound pressure level=76dB of calculating (judgement passes through)；Work as meter
When maximum sound pressure level=86dB of calculation, show slicing situation (judgement failure).
Fig. 2 is that microphone slicing test judgement program interface is shown in the specific embodiment of the invention.
In the specific implementation process, the correspondence test judgement software of design has interface prompt as shown, i.e., as shown in figure,
There is interface prompt shown in left figure when test is not by being judged as slicing；Test is by being judged as that no slicing situation then has shown in right figure
Interface prompt.
Mainly include following operation in the processing of second stage slicing situation:
Step S201: when voice signal B is judged as not slicing, that is, program judgement passes through in a particular embodiment, meeting
System is without processing.
Step S202: when voice signal B is judged as slicing, that is, program judgement fails in a particular embodiment, meeting
Conference system will reduce the analog gain of microphone automatically.
In the specific embodiment of the invention, the microphone of conference system has the analog gain of multi-gear adjustable section, such as 0-8 grades,
The value of gain 0.5dB between two grades, the analog gain of different conference system settings are also different.
Step S203: playing voice document again, judges slicing situation, until being judged as not slicing.
To guarantee that the collected voice signal of local microphone will not generate slicing situation, guarantee voice call quality.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art can manage
Solution, the present invention is not limited to the specific embodiments, are able to carry out various apparent variations, again for a person skilled in the art
New adjustment and substitution are without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, may be used also
To include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of conference system microphone slicing self checking method, which is characterized in that the self checking method includes the following operational phase:
Step a. carries out slicing judgement to the voice data that microphone acquires；
Step b. reduces the analog gain of microphone to clipped signal, plays voice document again, judges slicing situation, until sentencing
Until breaking as not slicing.
2. self checking method according to claim 1, which is characterized in that the step a includes: to be carried by conference system
Loudspeaker plays voice signal A automatically.
3. self checking method according to claim 1, which is characterized in that the step a includes: by external public address equipment
Loudspeaker plays voice signal A.
4. self checking method according to claim 2 or 3, which is characterized in that while the voice signal A is played, this
Ground microphone automatic collection obtains voice signal B.
5. self checking method according to claim 4, which is characterized in that the step a includes: to calculate the signal B most
Sound pressure level.
6. self checking method according to claim 5, which is characterized in that the step a includes: by the maximum of the signal B
Judge after compared with critical maximum sound pressure level of the sound pressure level when slicing of setting the voice signal B whether slicing.
7. self checking method according to claim 6, which is characterized in that the step b includes: by the slicing judging result
Output.
8. self checking method according to claim 7, which is characterized in that the step b includes: to be judged as not slicing for described
When, output slicing test passes through；By it is described be judged as slicing when, output have slicing situation.
9. self checking method according to claim 8, which is characterized in that the step b includes: described when being judged as slicing,
The analog gain of microphone is reduced to clipped signal.
10. self checking method according to claim 9, which is characterized in that the step b includes: that the reduction microphone increases
After benefit, voice document is played again, and judges automatically slicing situation, until being judged as not slicing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811552489.8A CN109616132A (en) | 2018-12-19 | 2018-12-19 | A kind of conference system microphone slicing self checking method |
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| CN201811552489.8A CN109616132A (en) | 2018-12-19 | 2018-12-19 | A kind of conference system microphone slicing self checking method |
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| CN104066036A (en) * | 2014-06-19 | 2014-09-24 | 华为技术有限公司 | Pick-up device and method |
| CN104519212A (en) * | 2013-09-27 | 2015-04-15 | 华为技术有限公司 | An echo cancellation method and apparatus |
| CN106657507A (en) * | 2015-11-03 | 2017-05-10 | 中移（杭州）信息技术有限公司 | Acoustic echo cancellation method and device |
| KR20180126926A (en) * | 2017-05-19 | 2018-11-28 | (주)오즈디에스피 | Signal processing apparatus and method for barge-in speech recognition |
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2018
- 2018-12-19 CN CN201811552489.8A patent/CN109616132A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247663A (en) * | 1996-12-31 | 2000-03-15 | 艾利森公司 | AC-center clipper for noise and echo suppression in communications system |
| JP2002009677A (en) * | 2000-06-23 | 2002-01-11 | Matsushita Electric Ind Co Ltd | Acoustic echo canceller |
| CN1826797A (en) * | 2003-05-27 | 2006-08-30 | 皇家飞利浦电子股份有限公司 | Loudspeaker-microphone system with echo cancellation system and method for echo cancellation |
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