CN105448306A - Voice loop detection system - Google Patents
Voice loop detection system Download PDFInfo
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- CN105448306A CN105448306A CN201510744171.XA CN201510744171A CN105448306A CN 105448306 A CN105448306 A CN 105448306A CN 201510744171 A CN201510744171 A CN 201510744171A CN 105448306 A CN105448306 A CN 105448306A
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- 238000001514 detection method Methods 0.000 title claims abstract description 63
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 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
- 238000004886 process control Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000013480 data collection Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000010998 test method Methods 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
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- 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
Disclosed in the invention is a voice loop detection system comprising a multi-channel hardware coupling circuit controlled by a switch and a control circuit formed by a single-chip microcomputer chip. The multi-channel hardware coupling circuit is used for connecting an output terminal of one path of voice channel of a mobile terminal to an input terminal of one path of voice input terminal of the terminal by a blocking coupling circuit; and the control circuit is used for realizing communication with a PC machine and completing gain configuration and detection flow control. The PC machine assists in completing starting of the detection flow and carrying out PCM data collection and determination. A signal generator generates PCM data for detection. According to the invention, mutual switching of all paths of participated loop detection signals is controlled by means of GPIO and electronic switch hardware and independent configuration of gains of all paths of signal is realized, thereby avoiding mutual interference caused by different gains. Meanwhile, connection detection of voice input and output circuits can be completed automatically by the program without any manual intervention, thereby accelerating detection and improving the determination accuracy. Compared with the prior art, the system enables several defects in the prior art to be overcome effectively and completely; and a reliable and high-speed automatic detection of the mobile terminal voice loop is provided.
Description
Technical field
The present invention relates to a kind of voice loop detection system for mobile terminal product.
Background technology
The fundamental purpose of voice loop detection is whether the phonetic entry/output in order to detect mobile terminal product each road after output is normal, and this detection is the test must carried out in the functional test of end product.The method of testing generally adopted at present is all manual detection: testing staff firmly blows or speech facing to the MIC on earphone or microphone, voice signal sends into Analog Baseband chip through the phonetic entry passage of terminal, change through A/D, become digital signal, these data are exported by real-time moving on a certain voice output passage again, testing staff listens to the voice of oneself by earphone or receiver, confirms that whether selected I/O passage is normal with this.One tunnel has been detected, and needs to be manually switched to an other road, and whole process all needs testing staff manually to complete.
Mobile terminal product is reserved with phonetic entry end and speech output end, carrying out voice loop detection is at present that module is anchored on check-out console, check-out console external microphone, earphone and loudspeaker meet the detection of all passages, testing staff is needed to vary in testing process, need longer detection time, produce line testing environment in addition more noisy, easily judge by accident.Mobile terminal product is drawn phonetic entry/output channel as interface, according to this feature, invented a kind of new voice loop detection system, solved problem above.
Summary of the invention
The present invention for mobile terminal product provide a kind of effectively and voice loop detection system at a high speed.
This voice loop detection system provided by the invention comprises:
Step 1, hyperchannel hardware coupled circuit, an output terminal of mobile terminal one road voice channel by being connected to the input end of this terminal one tunnel phonetic entry passage every straight coupled circuit; Control circuit, communicates with PC and completes gain configuration and testing process controls; The startup of testing process assisted by PC, the collection of PCM data and judgement.Signal generator produces the PCM data detected;
Step 2, one group of PCM data is produced with signal generator, selection frequency is the sinusoidal wave PCM data of 2KHz, this group PCM data are sent into mobile terminal sound output channel (sampling rate 8KHz) continuously, data are after the D/A conversion of speech processes and Analog Baseband, be transformed into analog sine to export, and deliver to the hardware coupled circuit input end of voice loop detection system;
Step 3, PC starts the trace routine of control circuit, and the testing process of control circuit configures a certain road coupled circuit and is communicated with, and other road disconnects;
Step 4, the analog sine wave signal of step 2 is sent into the hardware coupled circuit be communicated with by hardware coupled circuit input end, after completing gain configuration by control circuit, by this signal coupling to coupled circuit output terminal;
Step 5, analog sine wave signal is delivered to mobile terminal one road and is chosen phonetic entry passage (sampling rate 8KHz) by coupled circuit output terminal, through A/D conversion, and after speech processing module process, become PCM data, and deliver to the PCM data acquisition end of this road phonetic entry passage;
Step 6, PC gathers the data of the PCM data acquisition end of mobile terminal input channel, and judges that whether these data are the periodic signals (sampling rate as 8KHz) of 2KHz, if it is provides this road phonetic entry of mobile terminal/export normal conclusion, otherwise abnormal;
Step 7, current mobile terminal voice loop detection completes, and the testing process of control circuit configures current coupled circuit and disconnects, and next road coupled circuit is communicated with, and starts the detection of next road voice loop of mobile terminal;
Voice loop detection system needs hardware and software two parts to realize: the coupling channel that hardware components is made up of multiple output terminal and input end according to detection demand and control circuit are formed; Software section, ensure one channel attached time, other passages all disconnect, and judge the data collected from input channel after winding.
Hardware components sets up being of coupled connections of all passages in voice loop detection system, and control electronic switch by GPIO idle on the single-chip microcomputer of control circuit, because the bias voltage exported is different with the bias voltage of input, at output terminal and input end access block isolating circuit, the applying bias voltage of input end is adjusted to suitable value, guarantee that the signal distortionless input A/D inputted changes, and sample.
The realization of software utilizes the control circuit of voice loop detection system and PC to realize, and mainly includes two parts.
Part I is the configuration of each path I/O gain and the control of testing process, this part realizes on the control circuit of voice loop detection system, the control of flow process arranges the required several roads coupled circuit detected to be communicated with in turn, when the configuration connection of a certain road detects, other road remains open; After the voice loop detection of current road coupling channel connection completes, the voice channel automatically switching to next road coupling path connection detects; The configuration of gain is to keep the signal integrity exported, and the amplitude of input signal adds that the gain of input end can not exceed the maximum peak peak value allowing input, guarantees the data integrity that input end is adopted like this.The sampling rate exported in addition and input is consistent, and is 8KHz.
Part II start detection program also judges the data of adopting from input channel after winding, and this part has been come by PC.Whether judgement is normal in order to determine surveyed mobile terminal sound I/O, the periodic signal of decision method whether be the PCM data that judge to collect a be 2KHz (sampling rate as 8KHz), this signal is close to sinusoidal signal, if it is mobile terminal sound I/O is normal, otherwise is judged to be abnormal.Concrete decision method: to a time delay time data have just started to receive, after ensureing signal stabilization, continuous reception 4 data are as sample, then the 5th number received below and the 1st number are subtracted each other, ideally, this two number should be equal, and our judgement is that the absolute value of this difference of requirement is less than (very little compared with the value of this difference and number itself), then the 6th number and the 2nd number are subtracted each other, by that analogy.The number adopted below and sample are contrasted, the number that guarantee occurs below with 4 for loop cycle occur.But this judges situation identical for all numerical value to be also contained in the inside (being this situation during path open circuit).Therefore, need to ensure that this 4 number can not be all identical, therefore need increase by judgement, the difference of two numbers adjacent between two in 4 numbers of at every turn adopting is taken absolute value addition, this value should be greater than PCM numerical value corresponding to the peak-to-peak value of signal.Meet this two conditions simultaneously, could illustrate that the data of adopting are exactly the data that output terminal sends, otherwise be judged to failure.Signal may have fluctuation sometimes, in order to prevent erroneous judgement, in the judgement of thousand times, having allowed to be less than 10 times and not having met criterion.Be two numeric threshold, there is no concrete physical meaning.
Accompanying drawing explanation
Fig. 1 is mobile terminal sound IO channel to be measured;
The composition of Fig. 2 voice loop detection system;
The hardware circuit of Fig. 3 voice loop detection system.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
As shown in Figure 1, be mobile terminal sound IO channel to be measured, upper figure is output channel, comprises PCM data input pin, speech processing module, D/A conversion and loudspeaker.Figure below is input channel, comprises Mike, and A/D changes, speech processing module and PCM data acquisition end.Detect for convenience of phonological loop and the Mike of IO channel, loudspeaker, PCM data input pin and PCM data acquisition end are external to check-out console.
As shown in Figure 2, be the composition of voice loop detection system, comprise signal generator, PC, voice loop detection module and mobile terminal to be measured.Signal generator produces the sinusoidal wave PCM data that frequency is 2KHz, as detection data, inputs to the PCM data input pin of detection system; PC is used for start detection program judging the data of adopting from input channel after winding; Voice loop detection module comprises hardware and software two parts, and hardware is made up of coupled circuit and control circuit, and software completes the control of gain configuration and testing process.
As shown in Figure 3, be two passage mobile terminal sound loop detection module hardware circuit, comprise coupled circuit and control circuit two parts.Coupled circuit is connected to a single-pole double-throw switch (SPDT) ADG736, its input pin " 6 " and " 10 " connect the loudspeaker of check-out console respectively, and its control end pin " 1 " and " 5 " meet the idle GPIO of voice loop detection system, control circuit, and by the break-make of these GPIO gauge tap." 2 " and " 4 " pin of ADG736, output terminal Mike 1 and the Mike 2 of voice loop detection system is coupled to by capacitance coupling circuit, capacity coupled object is carried out every directly, because the bias voltage exported is different with the bias voltage of input to output terminal and input end.And Mike 1 and Mike 2 are connected to Mike's end of check-out console.The applying bias voltage of Mike will adjust to suitable value, and the signal distortionless input A/D of such guarantee input changes, so be connected to voltage offset electric circuit at Mike's output terminal of voice loop detection system.
The control circuit of voice loop detection module adopts STC89C52RC single-chip microcomputer as control chip, it has 8KFLASH and 2KE2PROM can meet the software requirement of voice loop detection system.P15 with P17 of STC89C52RC is connected control end GPIO1 and GPIO2 of single-pole double-throw switch (SPDT) ADG736, utilizes serial port level conversion chip MAX232 to be connected with PC by STC89C52RC.Software by detecting: gain configuration and testing process control software design are downloaded to STC89C52RC single-chip microcomputer.
Below in conjunction with specific embodiment, the present invention will be further described.
Now be provided with mobile terminal 1 to be measured, and voice loop detection system 1.Mobile terminal 1 there is two-way voice channel need to detect, be set to input channel 1 and input channel 2 respectively, output channel 1 and output channel 2.The Mike of the two-way IO channel of mobile terminal, loudspeaker and PCM data input pin and PCM data acquisition end are drawn as interface.Voice loop detection system 1 there is two-way coupling channel, is respectively coupling channel 1 and coupling channel 2.
Step 1, is connected to the loudspeaker of the output channel 1 of mobile terminal 1 and output channel 2 loudspeaker 1 and the loudspeaker 2 of voice loop detection system 1 respectively; The Mike of the input channel 1 of mobile terminal 1 and input channel 2 is connected to respectively Mike 1 and the Mike 2 of voice loop detection system 1;
Step 2, produces with signal generator the sinusoidal wave PCM data that frequency is 2KHz, and this group PCM data are sent into the output channel 1 of mobile terminal 1 and the PCM data input pin (sampling rate 8KHz) of output channel 2 continuously;
Step 3, PCM data, after the output channel speech processing module process of mobile terminal 1, are sent into D/A conversion, are transformed into analog sine, and output to loudspeaker end;
Step 4, controls the control circuit of voice loop detection system 1, start detection program with PC.Control circuit control GPIO1 and GPIO2 of voice loop detection system 1 makes the required several roads detected open in turn, and when the configuration connection of a certain road detects, other road remains open;
Step 5, suppose that the coupling channel 1 of voice loop detection system 1 is connected, the analog sine that then output channel 1 loudspeaker of step 3 mobile terminal 1 exports inputs to coupling channel 1 through the loudspeaker 1 of voice loop detection system 1, the gain of control circuit configuration coupling channel 1 analog sine wave signal, sends into the output terminal Mike 1 of voice loop detection system after capacitive coupling filtering direct current noise signal;
Step 6, the output terminal Mike 1 of voice loop detection system 1 is connected with the Mike of mobile terminal input channel 1, so this analog sine sends into the A/D conversion of input channel, and after speech processing module process, becomes PCM data;
Step 7, PC gathers the data of the PCM data acquisition end of mobile terminal input channel 1, and judge that whether these data are the periodic signals (sampling rate as 8KHz) of 2KHz, decision method is: when data have just started to receive to a time delay, after ensureing signal stabilization, continuous reception 4 data are as sample, then the 5th number received below and the 1st number are subtracted each other, ideally, this two number should be equal, judgement is herein that the absolute value of this difference of requirement is less than (very little compared with the value of this difference and number itself), then the 6th number and the 2nd number are subtracted each other, by that analogy.The number adopted below and sample are contrasted, the number that guarantee occurs below with 4 for loop cycle occur.But this judges situation identical for all numerical value to be also contained in the inside (being this situation during path open circuit).Therefore, need to ensure that this 4 number can not be whole, therefore need increase by judgement, the difference of two numbers adjacent between two in 4 numbers of at every turn adopting is taken absolute value addition, this value should be greater than PCM numerical value corresponding to the peak-to-peak value of signal.Meet this two conditions simultaneously, could illustrate that the data of adopting are exactly the data that output terminal sends, otherwise be judged to failure.Signal may have fluctuation sometimes, in order to prevent erroneous judgement, in the judgement of thousand times, having allowed to be less than 10 times and not having met criterion.Be two numeric threshold, there is no concrete physical meaning;
Step 8, the output channel 1 of the mobile terminal 1 that the coupling channel 1 of voice loop detection system 1 is communicated with and input channel 1 complete voice loop detection, so control circuit control GPIO1 and GPIO2 of voice loop detection system 1 makes coupling channel 1 disconnect, coupling channel 2 is connected.Then the startup output channel 2 of mobile terminal 1 and the loop of input channel 2 detect automatically.
Claims (4)
1. a voice loop detection system, is characterized in that, described system comprises:
Step 1, hyperchannel hardware coupled circuit, an output terminal of mobile terminal one road voice channel by being connected to the input end of this terminal one tunnel phonetic entry passage every straight coupled circuit; Control circuit, communicates with PC and completes gain configuration and testing process controls; The startup of testing process assisted by PC, the collection of PCM data and judgement; Signal generator produces the PCM data detected;
Step 2, one group of PCM data is produced with signal generator, selection frequency is the sinusoidal wave PCM data of 2KHz, this group PCM data are sent into mobile terminal sound output channel (sampling rate 8KHz) continuously, data are after the D/A conversion of speech processes and Analog Baseband, be transformed into analog sine to export, and deliver to the hardware coupled circuit input end of voice loop detection system;
Step 3, PC starts the trace routine of control circuit, and the testing process of control circuit configures a certain road coupled circuit and is communicated with, and other road disconnects;
Step 4, the analog sine wave signal of step 2 is sent into the hardware coupled circuit be communicated with by hardware coupled circuit input end, after completing gain configuration by control circuit, by this signal coupling to coupled circuit output terminal;
Step 5, analog sine wave signal is delivered to mobile terminal one road and is chosen phonetic entry passage (sampling rate 8KHz) by coupled circuit output terminal, through A/D conversion, and after speech processing module process, become PCM data, and deliver to the PCM data acquisition end of this road phonetic entry passage;
Step 6, PC gathers the data of the PCM data acquisition end of mobile terminal input channel, and judges that whether these data are the periodic signals (sampling rate as 8KHz) of 2KHz, if it is provides this road phonetic entry of mobile terminal/export normal conclusion, otherwise abnormal;
Step 7, current mobile terminal voice loop detection completes, and the testing process of control circuit configures current coupled circuit and disconnects, and next road coupled circuit is communicated with, and starts the detection of next road voice loop of mobile terminal.
2. voice loop detection system according to claim 1, is characterized in that, the hardware coupling channel of all voice loops of mobile terminal set up by described hardware coupled circuit, controlled the switching of each passage by electronic switch; Idle GPIO on control circuit controls electronic switch, and at output terminal and input end access block isolating circuit, the applying bias voltage of adjustment input end, guarantees that the signal distortionless input A/D inputted changes, and sample.
3. voice loop detection system according to claim 1, it is characterized in that, described control circuit, control configuration and the testing process of each path I/O gain, testing process arranges the required several roads coupled circuit detected and is communicated with in turn, and when the configuration connection of a certain road detects, other road remains open, after the voice loop detection connected at current coupling channel completes, automatically switch to the voice channel that next road coupling path is communicated with and detect; The configuration of gain is to keep the signal integrity exported, and the amplitude of configuration input signal adds that the gain of input end can not exceed the maximum peak peak value allowing input.
4. voice loop detection system according to claim 1, it is characterized in that, described PC gathers the data of the PCM data acquisition end of mobile terminal input channel, and judge that whether these data are the periodic signals (sampling rate as 8KHz) of 2KHz, its decision method is: when data have just started to receive to a time delay, after ensureing signal stabilization, continuous reception 4 data are as sample, then the 5th number received below and the 1st number are subtracted each other, ideally, this two number should be equal, judgement is herein that the absolute value of this difference of requirement is less than (very little compared with the value of this difference and number itself), then the 6th number and the 2nd number are subtracted each other, by that analogy, the number adopted below and sample are contrasted, the number that guarantee occurs below with 4 for loop cycle occur, but this judges situation identical for all numerical value to be also contained in the inside (being this situation during path open circuit), therefore need to ensure that this 4 number can not be all identical, increase a judgement, the difference of two numbers adjacent between two in 4 numbers of at every turn adopting is taken absolute value addition, this value should be greater than PCM numerical value corresponding to the peak-to-peak value of signal, meet this two conditions simultaneously, could illustrate that the data of adopting are exactly the data that output terminal sends, otherwise be judged to failure, signal may have fluctuation sometimes, in order to prevent erroneous judgement, in the judgement of thousand times, having allowed to be less than 10 times and not having met criterion, and being two numeric threshold, not had concrete physical meaning.
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| CN110120693A (en) * | 2016-09-21 | 2019-08-13 | 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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| CN105448306B (en) | 2019-02-19 |
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