CN109150238A - Wireless audio integrated measurement system and method - Google Patents
Wireless audio integrated measurement system and method Download PDFInfo
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- CN109150238A CN109150238A CN201811251555.8A CN201811251555A CN109150238A CN 109150238 A CN109150238 A CN 109150238A CN 201811251555 A CN201811251555 A CN 201811251555A CN 109150238 A CN109150238 A CN 109150238A
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- 238000005259 measurement Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 15
- 238000012360 testing method Methods 0.000 claims abstract description 99
- 230000005236 sound signal Effects 0.000 claims abstract description 53
- 238000010998 test method Methods 0.000 claims abstract description 9
- 230000035945 sensitivity Effects 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 9
- 238000005070 sampling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Computational Linguistics (AREA)
- Multimedia (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
The present invention discloses a kind of wireless audio integrated measurement system, including test equipment and determinand, and the test equipment includes main control module, frequency hopping control module, signal source module, audio sending module, attenuation module, audio analysis module and radio module.The present invention also provides a kind of wireless audio integrated test method for testing, and step 1, test equipment sends wireless audio signal to determinand, and gradually reduces the energy of the wireless audio signal transmitted by it；Step 2, determinand receives the wireless audio signal that test equipment is sent, and is broadcast according to the wireless audio signal；Step 3, test equipment receives broadcast and the Synchronization Analysis audio of determinand, obtains the Sensitirity va1ue for the wireless audio signal that determinand issues test equipment.The present invention can be assembled in determinand and be finished, and the audio sound quality of determinand can be tested in the state of normal use, without designing special test connecting apparatus and test macro for determinand.
Description
Technical field
The test macro tested the present invention relates to audio-frequency test field more particularly to a kind of pair of complete audio product and
Test method.
Background technique
Wireless audio device usually mutually transfers audio by two or more wireless transmitters, and wireless audio products matter
The quality of amount is often embodied on the emitted energy of wireless front end, and is received in the sensitivity of audio signal.Wherein, sound is received
The sensitivity of frequency signal refers to the audio signal receiving terminal of wireless audio device, in lower audio power for broad sense
In the case where, appoint the audio power referential data range that can so receive audio signal (for example, the wireless audio device
The minimum energy that can receive -80dBm)；For the range of narrow sense, wireless audio device under different audio powers,
There is a sensitivity number, it is usually to use percentage that representative, which is that the receiving end of wireless audio receives the ability of audio signal,
It indicates and (for example, under -80dBm, remains to 70% audio power and be received or 30% audio power is lost), usually
It is represented with bit error rate, packet loss or delivering power.The corresponding transmission success rate of energy will be received or fault rate is depicted as
One group of curve is then so-called sensitivity curve.
Usually that tests performance of front end and the sensitivity of audio is separately observed, this survey for traditional wireless audio devices
Method for testing may create the problem that
On the one hand, since under general work mode, traditional test equipment is difficult that wireless audio dress is objectively measured out
The receiving efficiency of receiving end is set, therefore, a special test pattern can be arranged in the digital receiver of traditional test equipment
Reach to send specific code, however, needing to design outside special test pattern at this test mode, it is also necessary to be connected to specific
Test fixture just can be carried out test, therefore, when traditional test equipment is tested, need to be surveyed when measured object is half cost
Examination, it is above various all to cause test inconvenient；
On the other hand, the part that traditional test equipment can test is only limitted to the autonomous working shape of measured object wireless front end
State is unable to test use state when product is integrally connected to kernel and agreement actual motion；Traditional test equipment is wirelessly to connect
The probability of dropout is received to judge the receiving sensitivity of the wireless front end of measured object, can only reflect measured object indirectly in this way
Operating status, and cannot judge that product wireless audio receives and dispatches effect, and can not judge audio sound quality；
It is only capable of obtaining the physical parameter of measured object front end relative to traditional examination equipment is surveyed, with measured object under more difference environment
It can remain to receive or issue enough clearly audio sensitivity of the sound quality more representative of measured object.It is preceding under the test environment
The Loss Rate or packet loss of the bit of end transmitting audio are not merely related to the energy that front end receiver arrives, and also transport with whole system
Row state is related, therefore, surveys sensitivity that traditional examination equipment is measured in test mode and not necessarily coincide measured object user
Actual experience.
Therefore, the prior art is defective, needs to improve.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of wireless audio integrated measurement system and side
Method.
Technical scheme is as follows:
Firstly, the present invention provides a kind of wireless audio integrated measurement system, including test equipment and determinand, it is described to
The audio signal of test equipment transmission can be received by surveying object, and send audio signal to test equipment, which is characterized in that the test
Equipment include main control module, frequency hopping control module, signal source module, audio sending module, attenuation module, audio analysis module and
Radio module；The main control module is electrically connected with frequency hopper module and audio analysis module respectively；The output of the frequency hopper module
The input terminal of connection signal source module is held, the output end of the signal source module electrically connects with the input terminal of audio sending module
It connects, the output end of the audio sending module connects attenuation module；The input terminal of the audio analysis module connects radio module.
Further, the sampled audio signal that the determinand that the audio analysis module acquires radio module is sent, and
The sampled signal of acquisition carries out Fourier transform, acquires the signal-to-noise ratio (SNR) of the sampled signal, then acquire the neighbour of the sampled signal
Nearly average signal-to-noise ratio (SNRvg (t)).
Further, the test equipment further includes audio decoder module and energy detection module, the audio decoder mould
Block and audio analysis module are electrically connected, and energy detection module and audio decoder module are electrically connected.
Further, the test equipment further includes playback module, and the playback module electrically connects with audio sending module
It connects.
The present invention also provides a kind of wireless audio integrated test method for testing, comprising the following steps:
Step 1, test equipment sends wireless audio signal to determinand, and gradually reduces the letter of the wireless audio transmitted by it
Number energy；
Step 2, determinand receives the wireless audio signal that test equipment is sent, and is broadcast according to the wireless audio signal
Sound；
Step 3, test equipment receives broadcast and the Synchronization Analysis audio of determinand, show that determinand sends out test equipment
The Sensitirity va1ue of wireless audio signal out；
Step 4, step 1 is repeated to step 3, and the wireless audio that test equipment show that determinand issues test equipment is believed
Number sensitivity curve.
Further, in step 1, test equipment is sent wireless in the case where original state is zero-decrement situation to determinand
Audio signal.
Further, in step 3, test equipment obtains the spirit for the wireless audio signal that determinand issues test equipment
The process of sensitivity value the following steps are included:
Step 301, the broadcast of determinand is sampled, obtains sampled signal；
Step 302, windowing process is carried out by window function W (t) to above-mentioned sampled signal, obtains signal wave in time-domain
Expression formula；
Step 303, Fourier transform is carried out to above-mentioned expression formula, signal rows time domain is transformed into frequency domain；
Step 304, the Signal to Noise Ratio (SNR) (t) of above-mentioned sampled signal is calculated；
Step 305, the neighbouring average signal-to-noise ratio SNRavg (t) of above-mentioned sampled signal is calculated.
Using the above scheme, test macro and test method provided by the invention can be assembled in determinand and be finished, and can be just
The audio sound quality that determinand is tested in the state of being often used, without designing special test connecting apparatus and test for determinand
System；The present invention receives the sensitivity of wireless audio signal in addition to that can test measured object, moreover it is possible to be measured when not decaying by signal
The audio signal that object is sent obtains the basic sound quality of the determinand, increases the efficiency of disposable test process.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the work flow diagram of one embodiment of the invention sound intermediate frequency analysis module；
Fig. 3 is the sensitivity curve figure of the present embodiment.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Referring to figs. 1 to shown in Fig. 3, since wireless digital voice stream carries out usually in the form of broadcast voice signal package
Transmission, for the sound fluency of implementation, therefore less design has retransmission mechanism, therefore dropped audio signal package.Lose sound
Believe that other audio sound quality losses such as staccato, distortion, sonic boom or even tone-off can occur when audio plays for signal package, it is traditional
The part that test equipment can test is only limitted to the autonomous working state of measured object wireless front end, is unable to test in product is integrally connected to
Use state when core and agreement actual motion.
To solve the above problems, the present invention provides a kind of in the case where measured object assembling finishes, testing audio sensitivity
Device and method, realize measured object own system run in the case where, measurement measured object transmitting-receiving energy situation and sound
Frequency sound quality.
Firstly, the present invention provides a kind of wireless audio integrated measurement system, including test equipment 100 and determinand 200,
The determinand 200 can receive the audio signal of the transmission of test equipment 100, and send audio signal to test equipment 100, described
Test equipment 100 includes main control module 101, frequency hopping control module 102, signal source module 103, audio sending module 104, decaying
Module 105, audio analysis module 106 and radio module 107；The main control module 101 respectively with frequency hopper module and audio analysis
Module 106 is electrically connected；The input terminal of the output end connection signal source module 103 of the frequency hopper module, the signal source module
103 output end and the input terminal of audio sending module 104 are electrically connected, the output end connection of the audio sending module 104
Attenuation module 105；The input terminal of the audio analysis module 106 connects radio module 107.
Wherein, measured object, which can be bluetooth headset etc., can receive wireless audio signal, and carry out physical audio broadcasting
Teller machines.The main control module 101 includes a control MCU.Frequency hopping control module 102 is used to trigger the signal of different frequency.
In the present embodiment, frequency hopping control module 102 can be a frequency hopping controller.Signal source module 103 is according to frequency hopping control module 102
The frequency of setting generates the audio signal of different frequency.In the present embodiment, signal source module 103 can generate dress for a signal
It sets, different audio signals can be exported.
The audio sending module is for generating wireless audio signal, and in the present embodiment, audio sending module 104 is using penetrating
Frequency sending device can convert radio frequency transmission from the mode of wireless transmission for audio signal.Attenuation module 105 is used for attenuation audio
The energy for the wireless signal that sending module 104 is sent.In the present embodiment, attenuation module 105 uses attenuator, for gradually reducing
The energy for the radiofrequency signal that radio frequency sending device is sent.Corresponding, measured object includes radio frequency reception end, is surveyed for receiving
The wireless audio that equipment 100 is sent is tried, an audio decoder is also connected with radio frequency reception end, for decoding radiofrequency signal.
Audio analyzer can be used in audio analysis module 106 in the present embodiment.The receipts being connect with audio analysis module 106
Sound module 107 is used to receive the physical audio of measured object transmission, and as one embodiment, the radio module 107 can use
The physical audio reception device of microphone etc.It is equipped with digital-to-analogue converter in the audio analysis module 106, is used for radio module
107 collected analog signals are converted into digital signal.
The audio analysis module 106 passes through the sound that digital-to-analogue converter sends the determinand 200 that radio module 107 acquires
Frequency signal sampling, and the sampled signal obtained carries out Fourier transform, acquires the signal-to-noise ratio (SNR) of the sampled signal, then acquire
The neighbouring average signal-to-noise ratio (SNRvg (t)) of the sampled signal.
The test equipment 100 further includes audio decoder module and energy detection module, the audio decoder module and sound
Frequency analysis module 106 is electrically connected, and energy detection module 109 and audio decoder module 108 are electrically connected, in the present embodiment, energy
Measuring detection module 109 includes a wireless audio energy measuring equipment, and the audio decoder module 108 is an audio decoder.With
This is corresponded to, and radio frequency sending device is equipped in determinand 200, for sending the wireless audio signal of determinand 200.The energy inspection
Survey the wireless audio energy that module 109 is used to detect determinand 200.
The test equipment 100 further includes playback module 110, and the playback module 110 and audio sending module 104 are electrical
Connection.In the present embodiment, the equipment such as loudspeaker are can be used in playback set.Main control module 101 carries out physics by playback module 110 and broadcasts
Sound.Corresponding, audio signal reception device, such as microphone etc. are provided in determinand 200.Test equipment 100, sending by be measured
The audio signal reception device of object 200 receives, and is sent to test equipment 100 by the radio frequency sending device of determinand 200, by test equipment
100 energy test module 109 receives.At the same time, determinand 200 carries out the decoded audio signal of audio decoding apparatus
Broadcast, so that the audio analysis module 106 of test equipment 100 analyzes the audio sound quality that determinand 200 broadcasts.Convenient for determinand
200 audio power test is synchronous with audio Acoustics Analysis to be carried out.
The present invention also provides a kind of wireless audio integrated test method for testing, comprising the following steps:
Step 1, test equipment sends wireless audio signal to determinand, and gradually reduces the letter of the wireless audio transmitted by it
Number energy；Step 2, determinand receives the wireless audio signal that test equipment is sent, and is carried out according to the wireless audio signal
Broadcast；Step 3, test equipment receives broadcast and the Synchronization Analysis audio of determinand, show that determinand issues test equipment
Wireless audio signal Sensitirity va1ue；Step 4, step 1 is repeated to step 3, and test equipment obtains determinand to test equipment
The sensitivity curve of the wireless audio signal issued.
In the present embodiment, it is real that above-mentioned wireless audio integration test equipment can be used in wireless audio integrated test method for testing
It is existing.Specifically, test equipment main control module controls signal source module by frequency hopping control module and generates audio letter in step 1
Number, which is converted into radio frequency transmission from the mode of wireless transmission by wireless audio module, by audio signal.Decay mode
The energy for the wireless signal that block is sent for attenuation audio sending module.It, can be by test equipment in original state in the present embodiment
To send wireless audio signal to determinand in zero-decrement situation.
In step 3, test equipment obtains the Sensitirity va1ue for the wireless audio signal that determinand issues test equipment
Process the following steps are included:
Step 301, the broadcast of determinand is sampled, obtains sampled signal；Step 302, logical to above-mentioned sampled signal
It crosses window function W (t) and carries out windowing process, obtain signal wave in the expression formula of time-domain；Step 303, above-mentioned expression formula is carried out
Signal rows time domain is transformed into frequency domain by Fourier transform；Step 304, the Signal to Noise Ratio (SNR) (t) of above-mentioned sampled signal is calculated；Step
305, calculate the neighbouring average signal-to-noise ratio SNRavg (t) of above-mentioned sampled signal.
Wherein, the audio analysis module is believed by the audio that the determinand that digital-to-analogue converter acquires radio module is sent
Number sampling, convert digital signal for the collected analog signal of radio module.It is additionally provided with buffer storage in audio analysis module,
For caching above-mentioned digital signal.The digital signal of caching obtains signal wave by carrying out windowing process by window function W (t)
In the expression formula of time-domain.Fourier transform is carried out to above-mentioned expression formula, signal rows time domain is transformed into frequency domain.
It is noted that main control module triggers the signal of different frequency by frequency hopping controller, with this in the present embodiment
Meanwhile main control module sends the frequency of the Frequency Hopping Signal to be set out to analysis module.The analysis module is believed according to the frequency hopping
The energy value for number calculating the Frequency Hopping Signal wins frequency-domain expression according to the signal obtained after Fourier transform and acquires the audio received
The energy value of signal, and acquire according to above-mentioned two energy value the Signal to Noise Ratio (SNR) (t) of the sampled signal.
Wherein, audio analysis module intercepts same time interval several segments digital signal carries out windowing process, obtains
Several window functions: W (t), W (t-1) ... W (t-n) after above-mentioned window function is carried out Fourier transform respectively, then are acquired respectively
The corresponding signal-to-noise ratio of each adjacent time interval: SNR (t),
SNR (t-1) ... SNR (t-n) averages to the corresponding signal-to-noise ratio of above-mentioned each adjacent time interval, can acquire this and adopt
The neighbouring average signal-to-noise ratio SNRvg (t) of sample signal.
It repeats the above steps, using the energy for the wireless audio that test equipment is sent after overdamping as abscissa, is adopted with this
The neighbouring average signal-to-noise ratio SNRvg (t) of sample signal is ordinate, and test equipment obtains the nothing that determinand issues test equipment
The sensitivity curve of line audio signal.Judge whether neighbouring average signal-to-noise ratio SNRvg (t) reaches and can receive for sensitivity curve
Minimum sound quality, set Th for the corresponding sensitivity of the minimum sound quality, it is neighbouring flat when the sampled signal acquired
When equal Signal to Noise Ratio (SNR) vg (t) is lower than Th, audio analysis module stops sampling analysis.It can determine whether that this is tested according to sensitivity curve
The sensitivity of the received wireless audio signal of object.
The above is merely preferred embodiments of the present invention, be not intended to restrict the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (7)
1. a kind of wireless audio integrated measurement system, including test equipment and determinand, the determinand can receive test and set
The audio signal that preparation is sent, and audio signal is sent to test equipment, which is characterized in that the test equipment includes master control mould
Block, frequency hopping control module, signal source module, audio sending module, attenuation module, audio analysis module and radio module；It is described
Main control module is electrically connected with frequency hopper module and audio analysis module respectively；The output end connecting signal source mould of the frequency hopper module
The input terminal of block, the output end of the signal source module and the input terminal of audio sending module are electrically connected, and the audio is sent
The output end of module connects attenuation module；The input terminal of the audio analysis module connects radio module.
2. according to claim 1, which is characterized in that the determinand that the audio analysis module acquires radio module is sent out
The sampled audio signal sent, and the sampled signal obtained carries out Fourier transform, acquires the signal-to-noise ratio (SNR) of the sampled signal,
The neighbouring average signal-to-noise ratio (SNRvg (t)) of the sampled signal is acquired again.
3. according to claim 1, which is characterized in that the test equipment further includes audio decoder module and energy measuring
Module, the audio decoder module and audio analysis module are electrically connected, and energy detection module electrically connects with audio decoder module
It connects.
4. according to claim 1, which is characterized in that the test equipment further includes playback module, the playback module
It is electrically connected with audio sending module.
5. a kind of wireless audio integrated test method for testing, which comprises the following steps:
Step 1, test equipment sends wireless audio signal to determinand, and gradually reduces wireless audio signal transmitted by it
Energy；
Step 2, determinand receives the wireless audio signal that test equipment is sent, and is broadcast according to the wireless audio signal；
Step 3, test equipment receives broadcast and the Synchronization Analysis audio of determinand, obtains what determinand issued test equipment
The Sensitirity va1ue of wireless audio signal；
Step 4, step 1 is repeated to step 3, test equipment obtains the wireless audio signal that determinand issues test equipment
Sensitivity curve.
6. wireless audio integrated test method for testing according to claim 1, which is characterized in that in step 1, test equipment exists
Original state is to send wireless audio signal to determinand in zero-decrement situation.
7. wireless audio integrated test method for testing according to claim 1, which is characterized in that in step 3, test equipment is obtained
The process of the Sensitirity va1ue for the wireless audio signal that determinand issues test equipment out the following steps are included:
Step 301, the broadcast of determinand is sampled, obtains sampled signal；
Step 302, windowing process is carried out by window function W (t) to above-mentioned sampled signal, obtains signal wave in the expression of time-domain
Formula；
Step 303, Fourier transform is carried out to above-mentioned expression formula, signal rows time domain is transformed into frequency domain；
Step 304, the Signal to Noise Ratio (SNR) (t) of above-mentioned sampled signal is calculated；
Step 305, the neighbouring average signal-to-noise ratio SNRavg (t) of above-mentioned sampled signal is calculated.
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| CN112437418A (en) * | 2020-07-17 | 2021-03-02 | 珠海市杰理科技股份有限公司 | TWS device communication data configuration method, device, equipment, chip and medium |
| CN113014335A (en) * | 2021-03-03 | 2021-06-22 | Tcl通力电子（惠州）有限公司 | Total omnidirectional sensitivity test method, equipment, system and storage medium |
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| CN208723894U (en) * | 2018-10-25 | 2019-04-09 | 深圳星禾设计有限公司 | Wireless audio integrated measurement system |
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