CN107360530A - The method of testing and device of a kind of echo cancellor - Google Patents
The method of testing and device of a kind of echo cancellor Download PDFInfo
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- CN107360530A CN107360530A CN201710533933.0A CN201710533933A CN107360530A CN 107360530 A CN107360530 A CN 107360530A CN 201710533933 A CN201710533933 A CN 201710533933A CN 107360530 A CN107360530 A CN 107360530A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
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Abstract
The invention discloses a kind of method of testing of echo cancellor and device, wherein method comprises the following steps：Proximally device plays test audio signal, proximal device communicate to connect with remote equipment；The audio signal to be measured that proximal device plays is received, audio signal to be measured is to be gathered by remote equipment after test audio signal is played and be transmitted back to the audio signal of proximal device；Audio Meter to be measured is obtained, extracts Audio Meter peak value to be measured；By the Audio Meter peak value to be measured got compared with the level threshold pre-set；The echo cancellor quality between proximal device and remote equipment is determined according to comparative result.The echo cancellor method of testing is by the quantitative analysis of audio signal to be measured, and the effect progress to echo cancellor is qualitative.Therefore, method of testing accuracy height and efficiency high；In addition, the method for testing is uniformly to receive and dispatch test signal by test device, regression test can be carried out, testing efficiency is high.
Description
Technical field
The present invention relates to echo processing technical field, and in particular to the method for testing and device of a kind of echo cancellor.
Background technology
Acoustic echo refers to the sound that the loudspeaker of remote equipment (or proximal device) plays back, by remote equipment (or
Proximal device) microphone pickup, proximal device (or remote equipment) is then communicated to, by proximal device (or remote equipment)
The sound that loudspeaker plays back.Can echo be heard by near-end user depending on two factors：One be echo energy, separately
Outer one is that near-end is spoken to the delay of near-end broadcasting distal end sound.Usually, speak to the delay for hearing echo and reach when near-end
When there is certain energy to more than 30 milliseconds and echo, the presence of echo is just may feel that, communication effect will be influenceed when serious.
In the prior art, the usual way for eliminating echo is to increase echo cancellation performance in distal end.The effect of echo cancellor
Depending on many factors, the definition such as talked except the subjective feeling index with people, intelligibility, whether trail, whether have back
Sound, whether smoothness etc. has outside the Pass for whether loud, exchange, and whether the size, echo path also with such as room be adapted, be double
Say, the distance of the size of the broadcast sound volume of the size of horn volume, video conference terminal, remote microphone and loudspeaker, play and set
The delay of standby processing sound, playback equipment whether open sound effect processing, echo cancellation convergence speed, it is double say threshold value,
Nonlinear Processing threshold value, the close phase of disposal ability whether opened AGC functions, whether open the parameter settings such as ANS and echo
Close.
So that video conference is tested as an example, the different positions in test process, it is necessary in all size, the room fitted up
Put, using various audio playing devices, the speak mode of exchange of tester carries out echo cancellor test.Not only test scene is numerous
It is more, environmental structure is cumbersome, and test environment stability is poor, and it is very big that regression test difficulty is carried out after modification problem.This
Under testing efficiency, echo cancellor (Acoustic Echo Canceller, referred to as AEC) Resolving probiems, the speed of performance optimization
Slow down significantly, the issue progress and quality of extreme influence product.It is badly in need of improving the speed and efficiency of echo cancellor test now.
The content of the invention
In view of this, the embodiments of the invention provide a kind of method of testing of echo cancellor and device, to solve existing skill
The problem of testing efficiency of echo cancellor quality is low in art, and regression test difficulty is big.
According in a first aspect, the embodiments of the invention provide a kind of method of testing of echo cancellor, comprise the following steps：
Proximally device plays test audio signal, the proximal device communicate to connect with remote equipment；
The audio signal to be measured that the proximal device plays is received, the audio signal to be measured is to be existed by the remote equipment
Gathered after playing the test audio signal and be transmitted back to the audio signal of the proximal device；
The Audio Meter to be measured is obtained, extracts the Audio Meter peak value to be measured；
By the Audio Meter peak value to be measured got compared with the level threshold pre-set；
The echo cancellor quality between the proximal device and the remote equipment is determined according to comparative result.
Alternatively, the level threshold includes the first level threshold and second electrical level threshold value, and first level threshold is small
In the second electrical level threshold value；It is described to determine that the echo between the proximal device and the remote equipment disappears according to comparative result
Except quality includes：
When the Audio Meter peak value to be measured is less than first level threshold, determine the proximal device with
Echo between the remote equipment is completely eliminated；
When the Audio Meter peak value to be measured higher than first level threshold and is less than the second electrical level threshold
During value, echo remnants be present after determining the echo cancellor between the proximal device and the remote equipment；
When the Audio Meter peak value to be measured reaches default higher than the second electrical level threshold value and duration
During the time, the echo cancellor failure between the proximal device and the remote equipment is determined.
Alternatively, the Audio Meter to be measured is obtained, extracting the Audio Meter peak value to be measured includes：
Work as SampleValue>When 0, PCMdB=Alogb(SampleValue/(2c-1-1))；
Work as SampleValue<When 0, PCMdB=Alogb(|SampleValue-2c|/(2c-1-1))；
The Audio Meter peak E choPeakdB=Max (PCMdB) to be measured；
Wherein, SampleValue is the sampled value of the audio signal amplitude to be measured；PCMdB is the audio letter to be measured
Number in level value corresponding to sampled value SampleValue；A is proportionality coefficient；B is constant；C is the audio signal amplitude to be measured
Sampling depth；Max (PCMdB) represents to take PCMdB maximum.
Alternatively, the method for testing also includes：The Audio Meter sampled value to be measured is obtained higher than described the
The duration of two level thresholds, specifically include：
When the Audio Meter peak value to be measured is higher than the second electrical level threshold value, sampling time and institute are obtained
State the number of whole sampled points in the sampling time；
Calculate the number that sampled value is more than continuous sampling point corresponding to the second electrical level threshold value；
Calculate the ratio of the number of the continuous sampling point and the number of whole sampled points；
The product of the ratio and the sampling time is calculated, the Audio Meter sampled value to be measured is obtained and is higher than
The duration of the second electrical level threshold value.
Alternatively, the Audio Meter sampled value to be measured is calculated by below equation and is higher than the second electrical level threshold
The duration of value：
EchoTime=(SampleCount (PCMdB>Second electrical level threshold value)/PCMSampleRate) * T；
Wherein, EchoTime is the duration；(SampleCount(PCMdB>Second electrical level threshold value) represent in sampled value
During more than second electrical level threshold value, the number of its corresponding continuous sampling point is taken；PCMSampleRate is all to be adopted in the sampling time
The number of sampling point；T is the sampling time.
According to second aspect, the embodiments of the invention provide a kind of test device of echo cancellor, including：
Broadcast unit, for proximally device plays test audio signal, the proximal device and remote equipment communication link
Connect；
Receiving unit, the audio signal to be measured played for receiving the proximal device, the audio signal to be measured are served as reasons
The remote equipment gathers after the test audio signal is played and is transmitted back to the audio signal of the proximal device；
First acquisition unit, for obtaining the Audio Meter to be measured, extract the electricity of the audio signal to be measured
Flat peak value；
Comparing unit, for by the Audio Meter peak value to be measured got and the level threshold that pre-sets
It is compared；
Qualitative unit, the echo cancellor matter between the proximal device and the remote equipment is determined according to comparative result
Amount.
Alternatively, the level threshold includes the first level threshold and second electrical level threshold value, and first level threshold is small
In the second electrical level threshold value；It is described to determine that the echo between the proximal device and the remote equipment disappears according to comparative result
Except quality includes：
When the Audio Meter peak value to be measured is less than first level threshold, determine the proximal device with
Echo between the remote equipment is completely eliminated；
When the Audio Meter peak value to be measured higher than first level threshold and is less than the second electrical level threshold
During value, echo remnants be present after determining the echo cancellor between the proximal device and the remote equipment；
When the Audio Meter peak value to be measured reaches default higher than the second electrical level threshold value and duration
During the time, the echo cancellor failure between the proximal device and the remote equipment is determined.
Alternatively, the Audio Meter to be measured is obtained, extracting the Audio Meter peak value to be measured includes：
Work as SampleValue>When 0, PCMdB=Alogb(SampleValue/(2c-1-1))；
Work as SampleValue<When 0, PCMdB=Alogb(|SampleValue-2c|/(2c-1-1))；
The Audio Meter peak E choPeakdB=Max (PCMdB) to be measured；
Wherein, SampleValue is the sampled value of the audio signal amplitude to be measured；PCMdB is the audio letter to be measured
Number in level value corresponding to sampled value SampleValue；A is proportionality coefficient；B is constant；C is the audio signal amplitude to be measured
Sampling depth；Max (PCMdB) represents to take PCMdB maximum.
Alternatively, the test device also includes：
Second acquisition unit, it is higher than the second electrical level threshold value for obtaining the Audio Meter sampled value to be measured
Duration, the second acquisition unit includes：
Subelement is obtained, for when the Audio Meter peak value to be measured is higher than the second electrical level threshold value, obtaining
Take the number of whole sampled points in sampling time and the sampling time；
First computation subunit, for calculating of the sampled value more than continuous sampling point corresponding to the second electrical level threshold value
Number；
Second computation subunit, for calculating the ratio of the number of the continuous sampling point and the number of whole sampled points
Value；
3rd computation subunit, for calculating the product of the ratio and the sampling time, obtain the audio to be measured
The level sample value of signal is higher than the duration of the second electrical level threshold value.
According to the third aspect, the embodiment of the present invention provides a kind of test equipment, including memory, processor and is stored in
The present invention first is realized on memory and the computer program that can run on a processor, during the computing device described program
The step of method of testing of echo cancellor described in any one of aspect.
It is described non-temporary the embodiments of the invention provide a kind of non-transient computer readable storage medium storing program for executing according to fourth aspect
State computer-readable recording medium storage computer instruction, the computer instruction are used to make the computer perform first aspect
Or the method for testing of the echo cancellor described in any one optional mode of first aspect.
According to the 5th aspect, the embodiments of the invention provide a kind of computer program product, the computer program product
Including the calculation procedure being stored on non-transient computer readable storage medium storing program for executing, the computer program includes programmed instruction, when
Described program instruction is when being computer-executed, make the computer perform first aspect or first aspect any one is optional
The method of testing of echo cancellor described in mode.
Technical scheme, have the following advantages that：
1. the method for testing for the echo cancellor that the embodiment of the present invention is provided, comprises the following steps：Proximally device plays
Test audio signal, the proximal device communicate to connect with remote equipment；Receive the audio to be measured letter that the proximal device plays
Number, the audio signal to be measured is described near to be gathered by the remote equipment and being transmitted back to after the test audio signal is played
The audio signal of end equipment；The Audio Meter to be measured is obtained, extracts the Audio Meter peak value to be measured；Will
The Audio Meter peak value to be measured got is compared with the level threshold pre-set；It is true according to comparative result
Fixed echo cancellor quality between the proximal device and the remote equipment.The method of testing of the echo cancellor is near by receiving
The audio signal to be measured that end equipment plays, in the test equipment of echo cancellor, the method for testing to be believed by audio to be measured
Number analysis, the effect of echo cancellor is carried out qualitative, rather than human subjective impression tests.Therefore, the echo cancellor
Method of testing accuracy height and efficiency high；In addition, the method for testing is uniformly to receive and dispatch test signal by test device, without work
Make personnel to be tested to each near-end or remote equipment, so as to carry out regression test, testing efficiency is high.
2. the method for testing for the echo cancellor that the embodiment of the present invention is provided, level threshold includes first in the method for testing
Level threshold and second electrical level threshold value, first level threshold are less than the second electrical level threshold value；It is described according to comparative result
Determine that the echo cancellor quality between the proximal device and the remote equipment includes：When the Audio Meter to be measured
When peak value is less than first level threshold, determine that the echo between the proximal device and the remote equipment is completely eliminated；
When the Audio Meter peak value to be measured is higher than first level threshold and is less than the second electrical level threshold value, it is determined that
Echo remnants after echo cancellor between the proximal device and the remote equipment be present；When the electricity of the audio signal to be measured
When flat peak value reaches preset time higher than the second electrical level threshold value and duration, determine the proximal device with it is described remote
Echo cancellor failure between end equipment.By by Audio Meter peak value to be measured and default level threshold or default
Level threshold and preset time are compared, and so as to realize the quantitative analysis of echo cancellor quality, the method for testing accuracy is high,
And the time of echo cancellation performance tuning can be reduced.
3. a kind of echo cancellor test device provided in an embodiment of the present invention, including：Broadcast unit, for proximally equipment
Test audio signal is played, the proximal device communicates to connect with remote equipment；Receiving unit, for receiving the proximal device
The audio signal to be measured played, the audio signal to be measured are to be adopted by the remote equipment after the test audio signal is played
Collect and be transmitted back to the audio signal of the proximal device；First acquisition unit, for obtaining the Audio Meter to be measured,
Extract the Audio Meter peak value to be measured；Comparing unit, for the Audio Meter to be measured that will be got
Peak value is compared with the level threshold pre-set；Qualitative unit, according to comparative result determine the proximal device with it is described
Echo cancellor quality between remote equipment.The echo cancellor test device, unified audio signal of receiving and dispatching are used to test, and test is accurate
True property is high, regression test can be carried out, so as to reduce the time of echo cancellation performance tuning.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to accompanying drawing, accompanying drawing is schematically without that should manage
Solve to carry out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows the flow chart of the method for testing of echo cancellor according to embodiments of the present invention；
Fig. 2 shows the concrete structure schematic diagram according to test environment of the present invention；
Fig. 3 shows the schematic diagram of the test device of echo cancellor according to embodiments of the present invention；
Fig. 4 shows the partial schematic diagram of the test device of echo cancellor according to embodiments of the present invention；
Fig. 5 shows the schematic diagram of test equipment according to embodiments of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art are not having
There is the every other embodiment made and obtained under the premise of creative work, belong to the scope of protection of the invention.
, it is necessary to which explanation, term " first ", " second " are only used for describing purpose, and can not manage in the description of invention
Solve to indicate or implying relative importance.
Those skilled in the art are it is to be understood that " level " in audio signal just refers in circuit 2 points or several
The relative ratio of point electricity under same impedance, electricity here refer to electrical power, voltage, electric current and multiple are turned into logarithm, use
" decibel " represents, is denoted as " dB ".
Build the test environment of echo cancellor in a simulation embodiment of the present invention：Embodiment is, such as Fig. 2 institutes
Show, communication connection is established between proximal device 10 and remote equipment 30, then using the echo cancellor test device 11 of near-end
Test audio signal is played, substitution microphone is exported to the first terminal 12 of near-end；The test audio signal passes through first afterwards
The coding of terminal 12 is sent, and remote equipment 30 is reached by network transmission 20；The second terminal 31 of remote equipment 30 decodes after receiving,
The test audio signal is played to sound delay device 32, sound delay device 32 is played to reverberation after the test audio signal is postponed
Device 33, after reverberator 33 produces reverberation, transmit to second terminal 31；The audio coding that remote equipment 30 gathers second terminal 31
Send, reach proximal device 10 by network transmission 20, played after the reception decoding of first terminal 12 of proximal device 10, echo disappears
Except test equipment 11 gathers the audio signal to be tested of the broadcasting of first terminal 12.Wherein AEC devices can be built in first terminal
In 12, or second terminal 31, or the telecommunication circuit of first terminal 12 and second terminal 31.
Wherein, the near-end human ear after removal AEC devices in the test environment can recognize that echo.In the embodiment of the present invention
Echo, be the relevant parameter by setting sound delay device 32 and sound reverberator 33, realize the method for testing of echo cancellor
In quantitative test.Wherein, relevant parameter includes the delay time for setting sound delay device 32, i.e. AEC devices are from receiving audio
Signal is to the delay time for collecting audio signal；The die-away time of acoustic reverberation device 33 is set, i.e. the decay of reverberation sound is prolonged
When the time；The reverberation interval of acoustic reverberation device 33 is set.
By adjusting delay time, die-away time and reverberation interval, the audio of more actual environments can be simulated
Characteristic.As a kind of optional combined situation, table 1 shows the combination of above-mentioned three kinds of parameters, the situation of echogenicity.
The test data of the echo of table 1
| Sequence number | Delay time | Die-away time | Reverberation interval | Whether echo is had |
| 1 | 100ms | 500ms | 10ms | It is |
| 2 | 110ms | 500ms | 10ms | It is |
In the test environment of the present invention, test audio signal is being played proximally by using echo cancellor test device 11,
Exported instead of near-end microphone to the collection port of first terminal 12；Pass through sound delay device 32 and sound reverberator 33 in distal end
Environment caused by analog echo, so as to avoid the diverse location in all size of distal end, the room of finishing, use is various
Audio playing device is tested, and then greatly simplify building for test environment, reduces required time, space and people
Power, the stability for the test effect of echo cancellor provide guarantee.
Embodiment 1
A kind of method of testing for depending on the echo cancellor of institute's test environment in Fig. 2, this time are provided in the embodiment of the present invention
The method of testing that sound eliminates is used in the test equipment 11 of echo cancellor.The echo cancellor test equipment 11 needs to broadcast with audio
The function with collection is put, the test equipment 11 of echo cancellor can possess the tests such as smart mobile phone, the computer of above-mentioned function to set
Standby, the flow chart of the method for testing of the echo cancellor is as shown in figure 1, comprise the following steps：
Step S11, proximally device plays test audio signal, the proximal device communicate to connect with remote equipment.
Proximally device plays test audio signal, the test audio signal pass through near-end to the test device 11 of echo cancellor
Communication channel between equipment and distal end, is transferred in remote equipment.
In the present embodiment, proximal device and remote equipment can be for the video conference terminal in video conference, also may be used
To be the electronic device terminal for other voice communication functions, such as can be mobile phone, computer etc..
Step S12, receives the audio signal to be measured that proximal device plays, and audio signal to be measured is to be played by remote equipment
Gathered after test audio signal and be transmitted back to the audio signal of proximal device.
The test audio signal that echo cancellor test device 11 plays plays by remote equipment, and by remote equipment
Sound delay device 32 and sound reverberator 33 are handled, i.e., the affix echo on the basis of test audio signal, then by AEC
Device processing.So far, the audio signal is audio signal to be measured.The echo that the audio signal transmission to be measured returns proximal device disappears
In the test device 11 removed, in the present embodiment, audio signal to be measured can be directly transferred to echo cancellor by electric channel
In test device 11 or the test device 11 of echo cancellor is entered while proximal device plays the audio signal to be measured
What row was recorded.
Step S13, Audio Meter to be measured is obtained, extract Audio Meter peak value to be measured.
After the test device 11 of echo cancellor receives audio signal to be measured, Audio Meter to be measured is obtained, and carry
Take the Audio Meter peak value to be measured, the qualitative analysis for AEC.
Step S14, by the Audio Meter peak value to be measured got compared with the level threshold pre-set.
The test device 11 of echo cancellor is by the Audio Meter peak value to be measured got and default level threshold
It is compared, draws corresponding comparative result.Wherein, the level threshold in the present embodiment can enter according to the property of audio signal
Row setting, can also set according to perception degree of the human ear to sound.
Step S15, the echo cancellor quality between proximal device and remote equipment is determined according to comparative result.
The test device 11 of echo cancellor is according to the comparison of Audio Meter peak value to be measured and default level threshold
As a result, the echo cancellor quality between proximal device and remote equipment is determined.
The audio signal to be measured that the method for testing of the echo cancellor is played by receiving proximal device, is surveyed for echo cancellor
During trial assembly is put, the method for testing is according to the quantitative analysis results of audio signal to be measured, and the effect progress to echo cancellor is qualitative
, rather than human subjective impression tests, and therefore, the method for testing accuracy is high and efficiency high；In addition, the method for testing is
Test signal is uniformly received and dispatched by the test device of echo cancellor, surveyed without staff to each near-end or remote equipment
Examination, therefore, regression test can be carried out, testing efficiency is high.So-called regression test, i.e., in original test environment, repeat
Above-mentioned method of testing step.Due in above-mentioned method of testing step, entirely being carried out by the test device of echo cancellor
Quantitative analysis, the process artificially not participated in, therefore, regression test can be carried out.
As a kind of optional embodiment of the present embodiment, in step s 13, Audio Meter to be measured is obtained, is carried
Audio Meter peak value to be measured is taken, including treats the amplitude progress sliding-model control for surveying audio signal, i.e., in the sampling time
It is interior, treat and survey the amplitude of audio signal and sampled, obtain some sampled values, the sampled value take the logarithm after processing, obtained
Audio Meter value to be measured, specific formula for calculation are as follows accordingly：
Work as SampleValue>When 0, PCMdB=Alogb(SampleValue/(2c-1-1))；
Work as SampleValue<When 0, PCMdB=Alogb(|SampleValue-2c|/(2c-1-1))；
Audio Meter peak E choPeakdB=Max (PCMdB) to be measured；
Wherein, SampleValue is the sampled value of the audio signal amplitude to be measured；PCMdB is the audio letter to be measured
Number in level value corresponding to sampled value SampleValue；A is proportionality coefficient, and span is [15,25]；B is constant, value
Scope is [5,15]；C is the sampling depth of the audio signal amplitude to be measured, and span is [8bit, 32bit]；Max
(PCMdB) expression takes PCMdB maximum.
As a preferred embodiment, because the sampling depth of the digital audio and video signals for high quality is 24bit-
32bit, some require tonequality relatively low occasion, such as the networking telephone, it is also possible to use 8bit.In sampling, higher adopts
Sample depth can provide the amplitude of more possibilities, so as to produce more big oscillating region, higher signal to noise ratio, improve and protect
True degree.However, the higher evaluation that correspond to of sampling depth is huger, calculate more complicated.Therefore, in the present embodiment, sample
Depth c chooses 16bit, and the sampling depth can not only ensure preferable audio fidelity, and and can enough simplifies calculating, reduce
The time of method of testing.In addition, A takes 20, b to take 10, denary logarithm calculates simply, and the degree of accuracy is higher, is method of testing
The degree of accuracy provide guarantee.
As a kind of optional embodiment of the present embodiment, the level threshold in the present embodiment include the first level threshold and
Second electrical level threshold value, the first level threshold are less than the second electrical level threshold value.Wherein, the scope of the first level threshold for [-
110dB, -90dB], the scope of second electrical level threshold value is [- 65dB, -55dB].As a preferred embodiment, the first electricity
Flat threshold value is -100dB, and second electrical level threshold value is -60dB, because p- 60dB of human ear or so arrives -100dB or so sound slightly
Perceive, but unobvious；Below -100dB or so sound, human ear will not perceive；More than -60dB or so sound human ear is easily felt
Know.Therefore, from the angle of Consumer's Experience, the first level threshold and second electrical level threshold value is set, the echo can be effectively improved
The accuracy of the method for testing of elimination, so as to improve the audio transmission effect of audio communication system.
Wherein, in step S15, the echo cancellor quality pack between proximal device and remote equipment is determined according to comparative result
Include following three kinds of situations：
When Audio Meter peak value to be measured is less than the first level threshold, determine between proximal device and remote equipment
Echo be completely eliminated；
When Audio Meter peak value to be measured is higher than the first level threshold and is less than second electrical level threshold value, near-end is determined
Echo remnants after echo cancellor between equipment and remote equipment be present；
When Audio Meter peak value to be measured is higher than second electrical level threshold value and the duration reaches preset time, really
Determine the echo cancellor failure between proximal device and the remote equipment.
In the present embodiment, by by Audio Meter peak value to be measured and default level threshold or default level threshold
Value and preset time are compared, and so as to realize the quantitative analysis of echo cancellor quality, the method for testing accuracy is high, and can
Reduce the time of echo cancellation performance tuning.
In the present embodiment, the method for testing also includes：Obtain Audio Meter sampled value to be measured and be higher than second electrical level
The duration of threshold value.Wherein, level sample value reaches preset time higher than Second Threshold and duration, does not imply that level
Sampled value persistently reaches preset time, is time point because peak is a sampled point, it is impossible to when forming lasting
Between；And refer within the sampling time, a certain section of amplitude exceedes the duration of the continuous sampling point number of Second Threshold.Specifically
Ground, obtain Audio Meter sampled value to be measured includes following calculation procedure higher than the duration of second electrical level threshold value：
Step S21, when Audio Meter peak value to be measured is higher than the second electrical level threshold value, obtain the sampling time with
And the number of whole sampled points in the sampling time；Wherein, the scope in sampling time is [500ms, 2000ms], and it can basis
Actual conditions are set, for example, it may be 500ms, 1000ms, 1500ms or 2000ms etc..In the present embodiment, the sampling time
For 1000ms, the sampling time can reduce amount of calculation, and then improve the effect of method of testing while sampling precision is ensured
Rate.
Step S22, calculate the number that sampled value is more than continuous sampling point corresponding to second electrical level threshold value；
Step S23, calculate the ratio of the number of continuous sampling point and the number of whole sampled points；
Step S24, ratio calculated and the product in the sampling time, obtain Audio Meter sampled value to be measured and are higher than
The duration of second electrical level threshold value.
As a kind of optional embodiment of the present embodiment, Audio Meter to be measured can be calculated by below equation
Sampled value is higher than the duration of the second electrical level threshold value：
EchoTime=(SampleCount (PCMdB>Second electrical level threshold value)/PCMSampleRate) * T；
Wherein, EchoTime is the duration；(SampleCount(PCMdB>Second electrical level threshold value) represent in sampled value
During more than second electrical level threshold value, the number of its corresponding continuous sampling point is taken；PCMSampleRate is all to be adopted in the sampling time
The number of sampling point；T is the sampling time.
In the present embodiment, duration EchoTime span is [45ms, 55ms].As a kind of preferable implementation
Mode, duration 50ms, because the duration is the time interval that may recognize that of human ear, by from Consumer's Experience angle
Set out, the duration is set, it is possible to increase the audio transmission effect of the audio communication system.
As a preferred embodiment of the present invention, in step S15, determine that proximal device is set with distal end according to comparative result
Echo cancellor quality between standby includes following three kinds of situations：
When Audio Meter peak value to be measured is less than -100dB, the echo between proximal device and remote equipment is determined
It is completely eliminated；
When Audio Meter peak value to be measured is higher than -100dB and is less than -60dB, determine that proximal device is set with distal end
Echo remnants after echo cancellor between standby be present；
When Audio Meter peak value to be measured is higher than -60dB and the duration reaches 50ms, proximal device is determined
Echo cancellor failure between the remote equipment.
Embodiment 2
A kind of test device of echo cancellor is provided in the embodiment of the present invention, for performing returning in the embodiment of the present invention 1
The method of testing that sound eliminates.As shown in figure 3, the test device includes：
Broadcast unit 41, for proximally device plays test audio signal, proximal device communicates to connect with remote equipment；
Receiving unit 42, for receiving the audio signal to be measured of proximal device broadcasting, audio signal to be measured is by distally setting
It is standby to be gathered after test audio signal is played and be transmitted back to the audio signal of proximal device；
First acquisition unit 43, for obtaining Audio Meter to be measured, extract Audio Meter peak value to be measured；
Comparing unit 44, for the Audio Meter peak value to be measured got to be entered with the level threshold pre-set
Row compares；
Qualitative unit 45, the echo cancellor quality between proximal device and remote equipment is determined according to comparative result.
As a kind of optional embodiment of the present embodiment, the level threshold in the test device includes the first level threshold
With second electrical level threshold value, the first level threshold is less than second electrical level threshold value；Wherein, according to comparative result determine proximal device with it is remote
Echo cancellor quality between end equipment includes：
When Audio Meter peak value to be measured is less than the first level threshold, determine between proximal device and remote equipment
Echo be completely eliminated；
When Audio Meter peak value to be measured is higher than the first level threshold and is less than second electrical level threshold value, near-end is determined
Echo remnants after echo cancellor between equipment and remote equipment be present；
When Audio Meter peak value to be measured is higher than second electrical level threshold value and the duration reaches preset time, really
Determine the echo cancellor failure between proximal device and remote equipment.
As another optional embodiment of the present embodiment, Audio Meter to be measured is obtained, extracts audio to be measured
The peak of signal includes：
Work as SampleValue>When 0, PCMdB=Alogb(SampleValue/(2c-1-1))；
Work as SampleValue<When 0, PCMdB=Alogb(|SampleValue-2c|/(2c-1-1))；
Audio Meter peak E choPeakdB=Max (PCMdB) to be measured；
Wherein, SampleValue is the sampled value of the audio signal amplitude to be measured；PCMdB is the audio letter to be measured
Number in amplitude corresponding to sampled value SampleValue；A is proportionality coefficient；B is constant；C is the audio signal amplitude to be measured
Sampling depth；Max (PCMdB) represents to take PCMdB maximum.
As another optional embodiment of the present embodiment, as shown in figure 4, the test device also includes：Second obtains
Unit 51, the duration of second electrical level threshold value is higher than for obtaining Audio Meter sampled value to be measured, second acquisition
Unit 51 specifically includes：
Subelement 511 is obtained, for when Audio Meter peak value to be measured is higher than second electrical level threshold value, obtaining sampling
The number of whole sampled points in time and sampling time；
First computation subunit 512, for calculating of the sampled value more than continuous sampling point corresponding to second electrical level threshold value
Number；
Second computation subunit 513, for calculating the ratio of the number of continuous sampling point and the number of whole sampled points；
3rd computation subunit 514, for ratio calculated and the product in sampling time, obtain Audio Meter to be measured
Sampled value is higher than the duration of second electrical level threshold value.
The echo cancellor test device, tested by unified transmitting-receiving audio signal, test accuracy is high, can be returned
Return test, so as to reduce the time of echo cancellation performance tuning.
Embodiment 3
Fig. 5 is the hardware architecture diagram of test equipment provided in an embodiment of the present invention, as shown in figure 5, the equipment includes
One or more processors 61 and memory 62, in Fig. 5 by taking a processor 61 as an example.
Test equipment can also include：AV display (not shown), for showing the level magnitude image of audio.
Processor 61, memory 62 can be connected with AV display by bus or other modes, to pass through bus in Fig. 5
Exemplified by connection.
Processor 61 can be central processing unit (Central Processing Unit, CPU).Processor 61 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other PLDs, discrete gate or transistor logic,
The chips such as discrete hardware components, or the combination of above-mentioned all kinds of chips.General processor can be microprocessor or the processing
Device can also be any conventional processor etc..
Memory 62 is used as a kind of non-transient computer readable storage medium storing program for executing, available for storing non-transient software program, non-
Transient computer executable program and module, the program as corresponding to the method for testing of the echo cancellor in the embodiment of the present application refer to
Order/module.Processor 61 is stored in non-transient software program, instruction and module in memory 62 by operation, so as to hold
The various function application of row server and data processing, that is, realize in above-described embodiment, the processing method of echo cancellor test.
Memory 62 can include storing program area and storage data field, wherein, storing program area can storage program area,
Application program required at least one function；Storage data field can store to be created according to the using for test device of echo cancellor
Data built etc..In addition, memory 62 can include high-speed random access memory, non-transient memory, example can also be included
Such as at least one disk memory, flush memory device or other non-transient solid-state memories.In certain embodiments, store
Device 62 is optional including can extremely be returned by network connection relative to the remotely located memory of processor 61, these remote memories
The test device that sound eliminates.The example of above-mentioned network includes but is not limited to internet, intranet, LAN, mobile communication
Net and combinations thereof.
One or more of modules are stored in the memory 62, when by one or more of processors 61
During execution, the method for testing of echo cancellor as shown in Figure 1 is performed.
The said goods can perform the method that the embodiment of the present invention is provided, and possesses the corresponding functional module of execution method and has
Beneficial effect.The ins and outs of detailed description, the correlation that for details, reference can be made in embodiment as shown in Figure 1 are not retouched in the present embodiment
State.
Embodiment 4
The embodiment of the present invention additionally provides a kind of non-transient computer storage medium, and the computer-readable storage medium is stored with
Computer executable instructions, the computer executable instructions can perform the processing in the method for testing embodiment of above-mentioned echo cancellor
Method.Wherein, the storage medium can be magnetic disc, it is CD, read-only memory (Read-Only Memory, ROM), random
Storage memory (Random Access Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk
Drive, abbreviation：) or solid state hard disc (Solid-State Drive, SSD) etc. HDD；The storage medium can also include above-mentioned
The combination of the memory of species.
It is to lead to it will be understood by those skilled in the art that realizing all or part of flow in above-described embodiment method
Computer program is crossed to instruct the hardware of correlation to complete, described program can be stored in a kind of computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (ROM) or random access memory (RAM) etc..
Although being described in conjunction with the accompanying embodiments of the invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case of various modification can be adapted and modification, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (10)
1. a kind of method of testing of echo cancellor, it is characterised in that comprise the following steps：
Proximally device plays test audio signal, the proximal device communicate to connect with remote equipment；
The audio signal to be measured that the proximal device plays is received, the audio signal to be measured is to be played by the remote equipment
Gathered after the test audio signal and be transmitted back to the audio signal of the proximal device；
The Audio Meter to be measured is obtained, extracts the Audio Meter peak value to be measured；
By the Audio Meter peak value to be measured got compared with the level threshold pre-set；
The echo cancellor quality between the proximal device and the remote equipment is determined according to comparative result.
2. method of testing according to claim 1, it is characterised in that the level threshold includes the first level threshold and the
Two level thresholds, first level threshold are less than the second electrical level threshold value；It is described that the near-end is determined according to comparative result
Echo cancellor quality between equipment and the remote equipment includes：
When the Audio Meter peak value to be measured is less than first level threshold, determine the proximal device with it is described
Echo between remote equipment is completely eliminated；
When the Audio Meter peak value to be measured is higher than first level threshold and is less than the second electrical level threshold value,
Echo remnants be present after determining the echo cancellor between the proximal device and the remote equipment；
When the Audio Meter peak value to be measured reaches preset time higher than the second electrical level threshold value and duration
When, determine the echo cancellor failure between the proximal device and the remote equipment.
3. method of testing according to claim 1 or 2, it is characterised in that obtain the Audio Meter to be measured, carry
The Audio Meter peak value to be measured is taken to include：
Work as SampleValue>When 0, PCMdB=Alogb(SampleValue/(2c-1-1))；
Work as SampleValue<When 0, PCMdB=Alogb(|SampleValue-2c|/(2c-1-1))；
The Audio Meter peak E choPeakdB=Max (PCMdB) to be measured；
Wherein, SampleValue is the sampled value of the audio signal amplitude to be measured；PCMdB is that the audio signal to be measured exists
Level value corresponding to sampled value SampleValue；A is proportionality coefficient；B is constant；C is adopting for the audio signal amplitude to be measured
Sample depth；Max (PCMdB) represents to take PCMdB maximum.
4. according to the method for testing described in any one of Claims 2 or 3, it is characterised in that the method for testing also includes：Obtain
The Audio Meter sampled value to be measured is higher than the duration of the second electrical level threshold value, specifically includes：
When the Audio Meter peak value to be measured is higher than the second electrical level threshold value, obtains the sampling time and described adopt
The number of whole sampled points in the sample time；
Calculate the number that sampled value is more than continuous sampling point corresponding to the second electrical level threshold value；
Calculate the ratio of the number of the continuous sampling point and the number of whole sampled points；
The product of the ratio and the sampling time is calculated, obtains the Audio Meter sampled value to be measured higher than described
The duration of second electrical level threshold value.
5. according to the method for testing described in any one of Claims 2 or 3, it is characterised in that by below equation calculate described in treat
The level sample value for surveying audio signal is higher than the duration of the second electrical level threshold value：
EchoTime=(SampleCount (PCMdB>Second electrical level threshold value)/PCMSampleRate) * T；
Wherein, EchoTime is the duration；(SampleCount(PCMdB>Second electrical level threshold value) represent to be more than in sampled value
During second electrical level threshold value, the number of its corresponding continuous sampling point is taken；PCMSampleRate is whole sampled points in the sampling time
Number；T is the sampling time.
A kind of 6. test device of echo cancellor, it is characterised in that including：
Broadcast unit, for proximally device plays test audio signal, the proximal device communicates to connect with remote equipment；
Receiving unit, the audio signal to be measured played for receiving the proximal device, the audio signal to be measured are by described
Remote equipment gathers after the test audio signal is played and is transmitted back to the audio signal of the proximal device；
First acquisition unit, for obtaining the Audio Meter to be measured, extract the Audio Meter peak to be measured
Value；
Comparing unit, for the Audio Meter peak value to be measured got and the level threshold pre-set to be carried out
Compare；
Qualitative unit, the echo cancellor quality between the proximal device and the remote equipment is determined according to comparative result.
7. the test device of echo cancellor according to claim 6, it is characterised in that the level threshold includes the first electricity
Flat threshold value and second electrical level threshold value, first level threshold are less than the second electrical level threshold value；It is described true according to comparative result
Fixed echo cancellor quality between the proximal device and the remote equipment includes：
When the Audio Meter peak value to be measured is less than first level threshold, determine the proximal device with it is described
Echo between remote equipment is completely eliminated；
When the Audio Meter peak value to be measured is higher than first level threshold and is less than the second electrical level threshold value,
Echo remnants be present after determining the echo cancellor between the proximal device and the remote equipment；
When the Audio Meter peak value to be measured reaches preset time higher than the second electrical level threshold value and duration
When, determine the echo cancellor failure between the proximal device and the remote equipment.
8. the test device according to claim 6 or 7, it is characterised in that obtain the Audio Meter to be measured, carry
The Audio Meter peak value to be measured is taken to include：
Work as SampleValue>When 0, PCMdB=Alogb(SampleValue/(2c-1-1))；
Work as SampleValue<When 0, PCMdB=Alogb(|SampleValue-2c|/(2c-1-1))；
The Audio Meter peak E choPeakdB=Max (PCMdB) to be measured；
Wherein, SampleValue is the sampled value of the audio signal amplitude to be measured；PCMdB is that the audio signal to be measured exists
Level value corresponding to sampled value SampleValue；A is proportionality coefficient；B is constant；C is adopting for the audio signal amplitude to be measured
Sample depth；Max (PCMdB) represents to take PCMdB maximum.
9. according to the method for testing described in any one of claim 7 or 8, it is characterised in that the test device also includes：Second
Acquiring unit, the duration of the second electrical level threshold value is higher than for obtaining the Audio Meter sampled value to be measured,
The second acquisition unit includes：
Subelement is obtained, for when the Audio Meter peak value to be measured is higher than the second electrical level threshold value, acquisition to be adopted
The number of whole sampled points in sample time and the sampling time；
First computation subunit, the number of continuous sampling point corresponding to the second electrical level threshold value is more than for calculating sampled value；
Second computation subunit, for calculating the ratio of the number of the continuous sampling point and the number of whole sampled points；
3rd computation subunit, for calculating the product of the ratio and the sampling time, obtain the audio signal to be measured
Level sample value be higher than the second electrical level threshold value duration.
10. a kind of test equipment, including memory, processor and storage are on a memory and the meter that can run on a processor
Calculation machine program, it is characterised in that the step of any one of claim 1-5 methods described is realized during the computing device described program
Suddenly.
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