CN105448306B - Voice loop detecting method - Google Patents
Voice loop detecting method Download PDFInfo
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- CN105448306B CN105448306B CN201510744171.XA CN201510744171A CN105448306B CN 105448306 B CN105448306 B CN 105448306B CN 201510744171 A CN201510744171 A CN 201510744171A CN 105448306 B CN105448306 B CN 105448306B
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims abstract description 4
- 238000004886 process control Methods 0.000 claims abstract 2
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000013480 data collection Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000005070 sampling Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
- G10L25/51—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination
- G10L25/60—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination for measuring the quality of voice signals
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
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- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses voice loop detection system, including the multichannel hardware coupling circuit by switch control, for an output end of mobile terminal voice channel all the way being connected to by blocking coupling circuit the input terminal of this terminal voice input channel all the way.The control circuit being made of singlechip chip, for realizing the communication with PC machine and completing gain configuration and testing process control.Assist completing the starting of testing process, the acquisition and judgement of PCM data by PC machine.The PCM data of detection is generated by signal generator.The present invention controls the mutual switching between each road participation loop detection signal by the hardware mode by GPIO and electronic switch, and being separately configured for each road signal gain may be implemented, and interferes with each other caused by avoiding because of gain difference.The detection of connectivity of voice input, output circuit can be automatically performed by program simultaneously, manual intervention is not necessarily to, accelerates detection speed, improve judging nicety rate.Compared with the prior art, the thorough effective solution of the present invention several big drawbacks of the existing technology, provide a kind of mobile terminal sound loop automatic testing method of reliable high speed.
Description
Technical field
The present invention relates to a kind of voice loop detecting methods for mobile terminal product.
Background technique
The main purpose of voice loop detection is defeated per voice all the way after output in order to detect mobile terminal product
Whether normal enter/export, this detection is a test must carrying out in the functional test of end product.It generallys use at present
Test method be all artificial detection: testing staff against the MIC on earphone or microphone firmly blow or speech, voice letter
Voice input channel number through terminal is sent into Analog Baseband chip, converts through A/D, becomes digital signal, this data is real-time again
Move and exported on a certain voice output channel, testing staff listens to the voice of oneself by earphone or earpiece, is come with this
Whether the selected input/output channel of confirmation is normal.Detection is completed all the way, is needed to be manually switched in addition all the way, whole process
Testing staff is required to manually complete.
Mobile terminal product is reserved with voice input terminal and speech output end, and carrying out voice loop detection at present is module
It is anchored in detection plate, detection plate external microphone, earphone and loudspeaker meet the detection in all channels, need to examine in detection process
Survey personnel vary, and need longer detection time, and in addition producing line detection environment is more noisy, are easy erroneous judgement.Mobile terminal
Product is drawn using voice input/output channel as interface, according to this feature, has invented a kind of new voice loop inspection
Survey method, to solve the problems, such as above.
Summary of the invention
The present invention provides a kind of effective and high speed voice loop detecting method for mobile terminal product.
This voice loop detecting method provided by the invention includes:
Step 1, multichannel hardware coupling circuit, mobile terminal all the way voice channel an output end pass through blocking coupling
Close circuit connection to this terminal voice input channel all the way input terminal；Control circuit communicates with PC machine and completes gain configuration
It is controlled with testing process；PC machine auxiliary completes the starting of testing process, the acquisition and judgement of PCM data.Signal generator generates
The PCM data of detection；
Step 2, one group of PCM data is generated with signal generator, selects frequency for the sine wave PCM data of 2KHz, this
Group PCM data is continuously introduced into mobile terminal sound output channel (sample rate 8KHz), and data are through speech processes and Analog Baseband
After D/A conversion, it is transformed into analog sine output, and send to the hardware coupling circuit input terminal of voice loop detecting method；
Step 3, the detection program of PC machine starting control circuit, the testing process of control circuit configure certain coupling circuit all the way
Connection, other roads disconnect；
Step 4, the hardware that the analog sine wave signal of step 2 is sent into connection is coupled electricity by hardware coupling circuit input terminal
Road completes gain with postponing by control circuit, couples coupling circuit output end for this signal；
Step 5, analog sine wave signal is sent and chooses voice input channel all the way to mobile terminal by coupling circuit output end
(sample rate 8KHz) is converted through A/D, and after speech processing module is handled, and becomes PCM data, and send so far road voice input
The PCM data collection terminal in channel；
Step 6, the data of the PCM data collection terminal of PC machine acquisition mobile terminal input channel, and whether determine this data
It is the periodic signal (sample rate 8KHz) of 2KHz, if it is provides this normal conclusion of road voice input/output of mobile terminal,
Otherwise abnormal；
Step 7, current mobile terminal voice loop detection is completed, and the testing process of control circuit configures current coupling circuit
Disconnect, under all the way coupling circuit be connected to, start the detection of voice loop all the way under mobile terminal；
Voice loop detecting method needs hardware and software two parts to realize: hardware components are according to detection demand by multiple
What the coupling channel and control circuit of output end and input terminal composition were constituted；Software section, when guarantee one is channel attached,
Other channels are all off, and are determined from the collected data of input channel after winding.
Hardware components are being of coupled connections for all channels to be established on voice loop detecting method, and pass through control circuit
Free time GPIO controls electronic switch on single-chip microcontroller, because the bias voltage of output is different with the bias voltage of input, in output end
Block isolating circuit is accessed with input terminal, the applying bias voltage of input terminal is adjusted to suitably be worth, it is ensured that the signal of input does not lose
A/D conversion is really inputted, and is sampled.
The realization of software is realized using the control circuit and PC machine of voice loop detecting method, mainly includes two
Point.
First part is the configuration of each access input/output gain and the control of testing process, this part is in voice
It is realized in the control circuit of loop detecting method, the control of process is that a few road coupling circuit detected needed for setting are connected in turn,
In the case where certain configures connection all the way and is detected, other roads are remained open；In the voice ring of current road coupling channel connection
After the completion of the detection of road, the voice channel for automatically switching to down coupling path connection all the way is detected；The configuration of gain be in order to
Keep the signal integrity of output, the maximum peak peak that the amplitude of input signal no more than allows to input plus the gain of input terminal
Value, the data for ensuring that input terminal is adopted in this way are complete.In addition the sample rate for exporting and inputting is consistent, and is 8KHz.
Second part starting detection program simultaneously the data adopted after winding from input channel are determined, this part by
PC machine is completed.Judgement is to determine whether surveyed mobile terminal sound input/output is normal, and determination method is to determine to adopt
Whether the PCM data integrated is that (for sample rate as 8KHz), this signal is close to sinusoidal signal, such as the periodic signal of a 2KHz
Fruit is that then mobile terminal sound input/output is normal, is otherwise determined as abnormal.Specific determination method: data just start to connect
To a delay when receipts, after guaranteeing signal stabilization, 4 data are continuously received as sample, then receiving below
5th number subtracts each other with the 1st number, and ideally, the two numbers should be equal, our judgement is require this difference exhausted
To value less than the first threshold value (this difference very little compared with the value of number itself), then the 6th number subtracts each other with the 2nd number, with
This analogizes.The number adopted below is compared with sample, guarantees that the number occurred below occurs with 4 for loop cycle.But this is sentenced
It is disconnected that the identical situation of all numerical value has been also contained in the inside (being such case when access open circuit).Therefore, it is necessary to guarantee this 4
Number cannot be all identical, it is therefore desirable to increase a judgement, the difference of two numbers adjacent two-by-two in 4 numbers adopted every time
Take absolute value addition, this value should be greater than the second threshold value of the corresponding PCM numerical value of peak-to-peak value of signal.Meet the two simultaneously
Condition could illustrate that the data adopted are exactly the data that output end is sent, otherwise be judged to failure.Signal there may come a time when to have wave
It is dynamic, it judges by accident in order to prevent, in thousand judgements, allows less than 10 times and be unsatisfactory for criterion.
Detailed description of the invention
Fig. 1 is mobile terminal sound I/O channel to be measured；
The composition of Fig. 2 voice loop detecting method；
The hardware circuit of Fig. 3 voice loop detecting method.
Specific embodiment
Following further describes the present invention with reference to the drawings.
As shown in Figure 1, being mobile terminal sound I/O channel to be measured, upper figure is output channel, including PCM data is defeated
Enter end, speech processing module, D/A conversion and loudspeaker.The following figure is input channel, including Mike, A/D conversion, speech processes mould
Block and PCM data collection terminal.It detects for convenience of phonological loop by the Mike of I/O channel, loudspeaker, PCM data input terminal
Detection plate is external to PCM data collection terminal.
As shown in Fig. 2, being the composition of voice loop detecting method, including signal generator, PC machine, voice loop detection
Module and mobile terminal to be measured.Signal generator generates the sine wave PCM data that frequency is 2KHz, as detection data, input
To the PCM data input terminal of detection method；PC machine is used to start detection program and to the data adopted after winding from input channel
Determined；Voice loop detection module includes hardware and software two parts, and hardware is made of coupling circuit and control circuit, soft
The control of part completion gain configuration and testing process.
As shown in figure 3, being two channel mobile terminal sound loop detection module hardware circuits, including coupling circuit and control
Circuit two parts.A single-pole double-throw switch (SPDT) ADG736 is connected in coupling circuit, input pin " 6 " and " 10 " connect inspection respectively
The loudspeaker of drafting board, and its control terminal pin " 1 " and " 5 " meet the idle GPIO of voice loop detecting method control circuit, are used in combination
The on-off of these GPIO control switches." 2 " and " 4 " pin of ADG736 is coupled to the inspection of voice loop by capacitance coupling circuit
The output end Mike 1 and Mike 2 of survey method, capacity coupled purpose is to carry out blocking to output end and input terminal, because of output
Bias voltage and input bias voltage it is different.And Mike 1 and Mike 2 are connected to the Mike end of detection plate.The outer biasing of Mike
Setting voltage will be adjusted to suitably be worth, and just can guarantee the distortionless input A/D conversion of the signal of input in this way, so in voice ring
Mike's output of road detection method is terminated with voltage offset electric circuit.
The control circuit of voice loop detection module, as control chip, there is 8K using STC89C52RC single-chip microcontroller thereon
FLASH and 2K E2PROM can satisfy the software requirement of voice loop detecting method.The P15 of STC89C52RC is connected with P17
The control terminal GPIO1 and GPIO2 of single-pole double-throw switch (SPDT) ADG736, using serial port level conversion core piece MAX232 by STC89C52RC
It is connected with PC machine.The software that will test: gain configuration and testing process control software download to STC89C52RC single-chip microcontroller.
The present invention will be further described combined with specific embodiments below.
Now it is equipped with mobile terminal 1 to be measured and voice loop detecting method 1.There are two-way voice channel needs on mobile terminal 1
Detection, is set to input channel 1 and input channel 2, output channel 1 and output channel 2.The two-way input and output of mobile terminal
Mike, loudspeaker and the PCM data input terminal and PCM data collection terminal in channel are drawn as interface.Voice loop detection side
There are two-way coupling channel, respectively coupling channel 1 and coupling channel 2 in method 1.
Step 1, the loudspeaker of the output channel 1 of mobile terminal 1 and output channel 2 is connected to voice loop detection side respectively
The loudspeaker 1 and loudspeaker 2 of method 1；The input channel 1 of mobile terminal 1 and the Mike of input channel 2 are connected to voice loop respectively
The Mike 1 and Mike 2 of detection method 1；
Step 2, the sine wave PCM data that frequency is 2KHz is generated with signal generator, and this group of PCM data is continuously sent
Enter the output channel 1 of mobile terminal 1 and the PCM data input terminal (sample rate 8KHz) of output channel 2；
Step 3, PCM data is sent into D/A conversion, transformation after the processing of the output channel speech processing module of mobile terminal 1
At analog sine, and it is output to loudspeaker end；
Step 4, with the control circuit of PC machine control voice loop detecting method 1, starting detection program.Voice loop detection
Method 1 control circuit control GPIO1 and GPIO2 make needed for detect several roads open in turn, certain configure all the way be connected into
In the case where row detection, other roads are remained open；
Step 5, it is assumed that the coupling channel 1 of voice loop detecting method 1 is connected, then the output of step 3 mobile terminal 1 is logical
The analog sine of 1 loudspeaker of road output is input to coupling channel 1, control circuit through the loudspeaker 1 of voice loop detecting method 1
Voice loop is sent into the gain for configuring 1 analog sine wave signal of coupling channel after capacitive coupling filters out direct current noise signal
The output end Mike 1 of detection method；
Step 6, the output end Mike 1 of voice loop detecting method 1 is connected with the Mike of mobile terminal input channel 1, institute
It is sent into the A/D conversion of input channel with this analog sine, and after speech processing module is handled, becomes PCM data；
Step 7, the data of the PCM data collection terminal of PC machine acquisition mobile terminal input channel 1, and determine that these data are
No is the periodic signal (sample rate 8KHz) of 2KHz, and determination method is: it is delayed when data just start to receive to one,
After guaranteeing signal stabilization, 4 data are continuously received as sample, then the 5th number received below and the 1st several phase
Subtract, ideally, the two numbers should be equal, and judgement herein is to require the absolute value of this difference less than the first threshold value
(this difference very little compared with the value of number itself), then the 6th number subtracts each other with the 2nd number, and so on.What is adopted below
Number is compared with sample, guarantees that the number occurred below occurs with 4 for loop cycle.But this judgement is the identical feelings of all numerical value
Condition has been also contained in the inside (being such case when access open circuit).Therefore, it is necessary to guarantee that this 4 numbers cannot be whole, it is therefore desirable to
Increase a judgement, the difference of two numbers adjacent two-by-two in 4 numbers adopted every time is taken absolute value addition, this value should be big
In the second threshold value of the corresponding PCM numerical value of the peak-to-peak value of signal.Meet the two conditions simultaneously, could illustrate the data adopted
It is exactly the data that output end is sent, is otherwise judged to failure.Signal there may come a time when to have fluctuation, judge by accident in order to prevent, thousand times
In judgement, allows less than 10 times and be unsatisfactory for criterion.
Step 8, the output channel 1 and input for the mobile terminal 1 that the coupling channel 1 of voice loop detecting method 1 is connected to
Voice loop detection is completed in channel 1, so the control circuit control GPIO1 and GPIO2 of voice loop detecting method 1 to couple
Channel 1 disconnects, and coupling channel 2 is connected.The loop of the output channel 2 and input channel 2 that then start mobile terminal 1 detects automatically.
Claims (4)
1. a kind of voice loop detecting method, which is characterized in that the described method includes:
Step 1, multichannel hardware coupling circuit, mobile terminal all the way voice channel an output end pass through blocking couple electricity
Road is connected to the input terminal of this terminal voice input channel all the way；Control circuit communicates with PC machine and completes gain configuration and inspection
Flow measurement process control；PC machine auxiliary completes the starting of testing process, the acquisition and judgement of PCM data；Signal generator generates detection
PCM data；
Step 2, one group of PCM data is generated with signal generator, selects frequency for the sine wave PCM data of 2KHz, this group of PCM
Data are continuously introduced into mobile terminal sound output channel, sample rate 8KHz, and data are converted through the D/A of speech processes and Analog Baseband
Afterwards, it is transformed into analog sine output, and send to the hardware coupling circuit input terminal for realizing voice loop detecting method；
Step 3, the detection program of PC machine starting control circuit, the testing process of control circuit configures certain, and coupling circuit connect all the way
Logical, other roads disconnect；
Step 4, the analog sine wave signal of step 2 is sent into the hardware coupling circuit of connection by hardware coupling circuit input terminal, by
Control circuit completes gain with postponing, and couples coupling circuit output end for this signal；
Step 5, coupling circuit output end send analog sine wave signal chooses voice input channel to mobile terminal all the way, sampling
Rate 8KHz, is converted through A/D, and after speech processing module is handled, and becomes PCM data, and send so far road voice input channel
PCM data collection terminal；
Step 6, PC machine acquisition mobile terminal input channel PCM data collection terminal data, and determine this data whether be
The periodic signal of 2KHz, sample rate 8KHz if it is provide this normal conclusion of road voice input/output of mobile terminal, no
It is then abnormal；
Step 7, current mobile terminal voice loop detection is completed, and it is disconnected that the testing process of control circuit configures current coupling circuit
Open, under all the way coupling circuit be connected to, start the detection of voice loop all the way under mobile terminal.
2. voice loop detecting method according to claim 1, which is characterized in that the hardware coupling circuit establish movement
The hardware coupling channel of all voice loops of terminal, the switching in each channel is controlled by electronic switch；Free time in control circuit
GPIO controls electronic switch, accesses block isolating circuit in output end and input terminal, adjusts the applying bias voltage of input terminal, it is ensured that defeated
The distortionless input A/D conversion of the signal entered, and sampled.
3. voice loop detecting method according to claim 1, which is characterized in that the control circuit controls each logical
The configuration of road input/output gain and testing process, a few road coupling circuit detected needed for testing process setting are connected in turn,
Certain configure all the way connection detected in the case where, other roads remain open, current coupling channel connection voice loop inspection
After the completion of survey, the voice channel for automatically switching to down coupling path connection all the way is detected；The configuration of gain is to keep
The signal integrity of output configures the maximum peak peak that the amplitude of input signal no more than allows to input plus the gain of input terminal
Value.
4. voice loop detecting method according to claim 1, which is characterized in that the PC machine acquisition mobile terminal input
The data of the PCM data collection terminal in channel, and determine this data whether be 2KHz periodic signal, sample rate 8KHz sentences
The method of determining is: to a delay when data just start to receive, after guaranteeing signal stabilization, continuously receiving 4 data conducts
Then sample subtracts each other the 5th number received below with the 1st number, ideally the two numbers should be equal, herein
Judgement is to require the absolute value of this difference less than the first threshold value, this difference very little compared with the value of number itself, then the 6th
Number is subtracted each other with the 2nd number, and so on；The number adopted below is compared with sample, guarantees the number occurred below with 4 for week
Phase circulation occurs, but inside this judge the identical situation of all numerical value to be also contained in, and when access open circuit is such case,
Therefore it needs to guarantee that this 4 numbers cannot be all identical, increases a judgement, in 4 numbers adopted every time two-by-two adjacent two
The difference of number takes absolute value addition, this value should be greater than the second threshold value of the corresponding PCM numerical value of peak-to-peak value of signal, simultaneously
Meet the two conditions, could illustrate that the data adopted are exactly the data that output end is sent, otherwise be judged to failure；Signal is sometimes
It might have fluctuation, judge by accident in order to prevent, in thousand judgements, allow less than 10 times and be unsatisfactory for criterion.
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| CN106451613B (en) * | 2016-09-21 | 2019-05-24 | 奇酷互联网络科技（深圳）有限公司 | Mobile device and its charging method |
| CN110907694A (en) * | 2020-02-07 | 2020-03-24 | 南京派格测控科技有限公司 | Method and device for calculating input current of power amplifier |
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