CN102325059A - Audio frequency end-to-end time delay measurement method of non-intrusive single end acquisition and apparatus thereof - Google Patents
Audio frequency end-to-end time delay measurement method of non-intrusive single end acquisition and apparatus thereof Download PDFInfo
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- CN102325059A CN102325059A CN201110268150A CN201110268150A CN102325059A CN 102325059 A CN102325059 A CN 102325059A CN 201110268150 A CN201110268150 A CN 201110268150A CN 201110268150 A CN201110268150 A CN 201110268150A CN 102325059 A CN102325059 A CN 102325059A
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Abstract
The invention provides an audio frequency end-to-end time delay measurement method of non-intrusive single end acquisition and an apparatus thereof. The audio frequency end-to-end time delay measurement method comprises the following steps: placing a measurement signal generator locally, closing an echo elimination function of a far-end terminal, taking a microphone close to a loudspeaker at a far end to form an audio frequency loop. One audio frequency measuring signal emitted by the signal generator directly enters into a measurement apparatus, and the other audio frequency measuring signal enters into a local terminal of a detected system, and both of them returns through a remote terminal audio frequency loop respectively. Delay inequalities of the two signals are divided by 2, and a result is taken as a measured value of audio frequency end-to-end time delay. The measurement apparatus provided in the invention comprises an audio frequency measuring signal generator, an audio frequency multipath acquisition module, an audio frequency time delay measurement unit and a data storage and display unit. The method is a non-intrusive type. Compared with the prior art, the method is not influenced by internal realization of the detected system, time delay of all link are included comprehensively, and the method has the characteristics of accuracy and convenience.
Description
Technical field
The present invention relates to the propagation of computer media information, QoS qos measurement, particularly relate to the audio frequency end-to-end time delay method of measurement and the device of the single-ended collection of non-intervention type.
Background technology
Use fast development and popularize along with based on network multimedia service, systems such as network audio-video program request, network audio-video meeting are popular rapidly.The user has proposed increasingly high requirement to the professional QoS service quality of network multimedia.How can be fast, convenient, accurately the key qos parameter of candidate products is made assessment, be the key of successfully selecting best product.
Simultaneously, research and development and produce the professional manufacturer with system of network multimedia also need a kind of device can be quickly and easily the key parameter of the network multimedia product of own production to be measured, so that in product development process, measure key parameter, and improvement at any time.
End-to-end time delay is one of critical performance parameters of multimedia service, and it directly influences the assessment of QoS and user experience.End-to-end time delay generally includes and gathers time delay, coding time delay, network transfer delay, decoding time delay, plays time delay etc.
The method of existing detection end-to-end time delay roughly can be divided into two big types: one type belongs to insertion type; Promptly through inject the measuring-signal of characteristic at an end of the signal transmission path of system under test (SUT); Perhaps additional measurement data on the original signal data of system under test (SUT); Extract the time that measurement data and recorder are arrived at the other end then, relatively the difference of two times is obtained the time delay size.
The main feature of this type insertion type method is need get involved in the signal transmission path of system under test (SUT), to wherein adding data or therefrom extract measurement data, has being connected of physical circuit between measurement mechanism and the equipment under test.
The main difficult point of this type insertion type method of measurement is:
At first, transmit because measurement data depends on the Frame or the packet of system under test (SUT) usually, middle inevitable through links such as encoding compression, encapsulation, decapsulation, decodings, measurement data may lose or damage in encoding compression and decompression procedure;
Secondly, because data format, encapsulation format, encoding compression and the decoding algorithm of system under test (SUT) may not disclose, the tester will design the metering system and the measuring-signal that match can compare difficulty.
The 3rd, the insertion type method of measurement usually requires serial connection tap or tandem head on the signal data path of system under test (SUT), and is for the system under test (SUT) that has installed, cumbersome usually or be not allowed to.
In addition, the tool software that the insertion type method of measurement that has need operating measurement be used on the terminal of system under test (SUT) carries out timing through tool software.This mode may influence the normal operation at system under test (SUT) terminal itself, can only use in exploitation and debug phase at most, and be difficult to be used in the system of commercialization.
Another kind of method of testing is a non-intervention type, does not have the physics contact between system under test (SUT) and the measurement mechanism, is regarded as flight data recorder to system under test (SUT), and test signal mainly is to get into system under test (SUT) through the sound and optic signal mode, and exports with sound, light mode.Measurement mechanism is through contrast and analyze input, the output signal obtains the time delay size.The advantage of these class methods is the actual motions that stay out of system under test (SUT), with system under test (SUT) concrete realize irrelevant, so have extensive applicability.Such as the subjective sensation and the sense of hearing through human eye, people's ear, assessing end-to-end time delay is exactly these class methods.
Though utilize human eye, people's ear to come subjective evaluation and test very directly perceived, exist under the more approaching situation of the end-to-end time delay parameter of very big error, especially two kinds of systems under test (SUT), be difficult to make science and judge accurately, cause measurement result to lack persuasion.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the audio frequency end-to-end time delay method of measurement and the device of the single-ended collection of non-intervention type is provided.
The present invention adopts the strategy of non-intervention, is used as flight data recorder to system under test (SUT), to system under test (SUT) end to end the audio frequency time delay designed the measuring technology scheme.
The technical scheme that audio frequency end-to-end time delay of the present invention is measured comprises the steps:
(1) with the far-end echo elimination/inhibit feature temporary close of system under test (SUT), the far-end microphone near far-end loudspeaker, is constituted the transmission of audio signals loop between local side and far-end;
(2) utilize measuring signal generator to produce the audio-frequency test signal of CF, AD HOC at local side, this test signal is gathered by the microphone of measurement mechanism and system under test (SUT) simultaneously;
(3) from the audio-frequency test signal of measuring signal generator, after the microphone collection by measurement mechanism, directly submit to signal processing module and detect, and note the T time of advent of this audio-frequency test signal
A1
(4) the audio-frequency test signal of being gathered by the microphone of system under test (SUT) through links such as encoding compression, Network Transmission, decodings, plays back in the far-end loudspeaker of system under test (SUT);
(5) the audio-frequency test signal of system under test (SUT) far-end loudspeaker broadcast after the far-end microphone collection by system under test (SUT), through links such as encoding compression, Network Transmission, decodings, is sent back to local side again, and is come out in the local side loudspeaker plays;
(6) the audio-frequency test signal of local side loudspeaker plays is gathered by the microphone of measurement mechanism once more, and submits to signal processing module and detect, and notes the T time of advent of this audio-frequency test signal
A2
(7) signal processing module of measurement mechanism calculates the time delay (T between the twice audio-frequency test signal that comes automatic signal generator and the local loud speaker of system under test (SUT) respectively according to test record
A2-T
A1), this time delay has been represented the audio loop time delay between local side and the far-end, promptly comprises forward-propagating time delay and backpropagation time delay.The signal processing module of measurement mechanism this loop time delay divided by 2 test results, i.e. Δ T as the audio frequency end-to-end time delay
A=(T
A2-T
A1)/2.
The audio frequency end-to-end time delay measurement mechanism of the single-ended collection of non-intervention type of the present invention number comprises following assembly:
Assembly 1, audio-frequency test signal generator 100 is responsible for producing the audio-frequency test signal.This signal can be analyzed and discerned by audio frequency latency measurement unit.
Assembly 2, voice-frequency-multichannel acquisition module 200 is responsible for the MCVF multichannel voice frequency test signal that input separates or mixes, and with the audio signal input audio frequency time-delay measuring unit that collects.
Assembly 3, audio frequency time-delay measuring unit 300 is responsible for the audio signal of input is analyzed, discerns, compared and measures, and confirms the audio frequency end-to-end time delay.
Assembly 4, storage and display unit 400 are used to store the audio frequency end-to-end time delay that shows that said audio frequency time-delay measuring unit 300 is confirmed.
The audio frequency end-to-end time delay method of measurement and the device of the single-ended collection of non-intervention type of the present invention have the following advantages:
(1) the inventive method is a non-intervention type, is regarded as flight data recorder to system under test (SUT).Therefore, method of testing of the present invention does not receive the influence of the factor such as internal structure, network type, data format, code decode algorithm, function implementation of system under test (SUT).
(2) the audio frequency end-to-end time delay measured of the inventive method, comprised from audio collection until voice playing in the time delay summation of interior all links, the audio frequency time delay that institute experiences and assesses when doing subjective evaluation and test with the user is in full accord on type and content.
(3) propagation path of the test signal of the inventive method in system under test (SUT) forms a loop, both comprised the propagation path from this locality to the far-end, also comprised the propagation path from the far-end to this locality.Even there is the whereabouts path in transmission network and returns asymmetric to the performance in path; Also can postpone through counter circuit; Obtain a comprehensive mean value divided by 2 then; Eliminate the influence that the performance asymmetry of this network path causes, the result after average can reflect the actual performance of system under test (SUT) audio frequency end-to-end time delay more accurately.
(4) the inventive method at the appointed time makes measuring signal generator produce test signal constantly in the section; Utilize measurement mechanism to continue test; Obtain a series of delay data; And therefrom analyze statistical natures such as maximum delay, minimal time delay and average delay, can more comprehensively reflect the performance change under the heterogeneous networks load condition of end-to-end time delay.
Description of drawings
Fig. 1 is the audio frequency end-to-end time delay test philosophy sketch map of the present invention's one instance;
Fig. 2 is the measurement mechanism internal structure sketch map of the present invention's one instance.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done to specify further, but execution mode of the present invention is not limited thereto.
Embodiment 1, and Fig. 1 has provided audio frequency end-to-end time delay testing principle sketch map.
Like Fig. 1, audio frequency end-to-end time delay method of measurement of the present invention comprises:
Step 1, the audio-frequency test signal generator sends the audio-frequency test signal, the microphone of the microphone of this signal while input measurement device and the local terminal of system under test (SUT).
(1) the audio-frequency test signal generator in this step 1 need be placed in the effective pickup distance of microphone of measurement mechanism, guarantees that the audio-frequency test signal that this generator produces can receive by measured effectively device.
(2) the audio-frequency test signal generator in this step 1 need be placed in the effective pickup distance of local microphone of system under test (SUT), guarantees that the audio-frequency test signal that this generator produces can get into equipment under test effectively.
(3) the audio-frequency test signal in this step 1 can be the tonepulse of particular frequency range, and the frequency of this tonepulse and pattern must be discerned by measured device, and writes down its initial moment and the peak value moment.Such as: but the audio-frequency test signal can be a very brief sound in people's ear identification frequency range, that certain intensity is arranged.
Step 2, the signal that gets into the local terminal microphone arrives the loud speaker of distance terminal through handling and Network Transmission.The then direct measured device of signal that gets into the local audio collecting device reads.
(1) the audio-frequency test signal in this step 2 gets into system under test (SUT) from local microphone, and through a series of links, finally the loud speaker at the system under test (SUT) distance terminal broadcasts.Such as, this audio-frequency test signal in system under test (SUT) the link of process include but not limited to: audio collection, encoding compression, encapsulation, network transmission, Network Transmission, network receive, connect encapsulation, decoding, broadcast etc.
(2) while of the audio-frequency test signal in this step 2 is by the microphone collection of measurement mechanism.The local microphone model of the model of the microphone of measurement mechanism and system under test (SUT) is irrelevant.
(3) the audio-frequency test signal that collects of the microphone of the measurement mechanism in this step 2 is finally submitted to signal processing unit analysis, and is write down its time of advent.
Step 3, system under test (SUT) distance terminal microphone receive the testing audio of far-end loudspeaker near far-end loudspeaker, through after the encoding and decoding, pass the local terminal back through Network Transmission.
(1) microphone of the system under test (SUT) distance terminal in this step 3 need guarantee that the test audio signal that far-end loudspeaker is sent can effectively He reliably be received by the microphone of distance terminal near far-end loudspeaker.
(2) the system under test (SUT) distance terminal in this step 3 needs temporary close echo elimination/inhibit feature, can be received by the far-end microphone smoothly to guarantee the audio-frequency test signal that far-end loudspeaker is sent, and be transmitted back to local side.
(3) test audio signal received of the system under test (SUT) distance terminal microphone in this step 3 gets into system under test (SUT) once more; Along passing the local terminal back in the other direction, the link of passage in transit includes but not limited to: audio collection, encoding compression, encapsulation, network transmission, Network Transmission, network receive, connect encapsulation, decoding, broadcast etc.
Step 4, local terminal receive the testing audio that distance terminal is passed back, play-over after the decoding, and the local audio signal collecting device of measured device receive, and measured then device reads.
(1) test audio signal in this step 4 is passed the local terminal back, and the decoding back is loudspeaker plays in the local terminal.
(2) the local loud speaker of the system under test (SUT) in this step 4 need be positioned in effective pickup distance of measurement mechanism microphone, guarantees that the audio-frequency test signal of local loudspeaker plays can the collection of measured effectively reliably device microphone.
(3) microphone of the microphone of the measurement mechanism in this step 4 and the measurement mechanism in the step 2 is same equipment.
(4) microphone of the measurement mechanism in this step 4 collects through behind the audio-frequency test signal that postpones, and submits to signal processing unit analysis.
Step 5, measurement mechanism is discerned the test audio signal of successively receiving, calculates time difference between the two, and divided by 2, as the audio frequency end-to-end time delay of system under test (SUT).
(1) measurement mechanism in this step 5 is discerned the audio-frequency test signal of successively receiving.Audio-frequency test signal through the system under test (SUT) transmission; Compare with the audio-frequency test signal that directly receives from signal generator; May have distortion to a certain degree, measurement mechanism need correctly identify the audio-frequency test signal that has delay from the signal that receives, and writes down its time of advent.
(2) measurement mechanism in this step 5 calculates time difference between the two according to the time of advent of the audio-frequency test signal of twice arrival successively.This time difference comprises from this locality to the far-end and returns local time delay from far-end, is equivalent to the end-to-end time delay of twice, therefore need obtain the mean value of end-to-end time delay divided by 2.
In above-mentioned steps 1～step 5; Measuring signal generator can periodically generate the audio-frequency test signal as required, and testing apparatus periodically repeats step 1～step 5; Obtain a series of time delay records; Therefrom carry out statistical analysis, obtain series of parameters such as maximum delay, minimal time delay, average delay and time delay variance, and submit to memory device to data set respectively and demonstration is preserved and printed to display device.
Embodiment 2, and Fig. 2 has provided the organigram of audio frequency end-to-end time delay measurement mechanism
Like Fig. 2, audio frequency end-to-end time delay measurement mechanism of the present invention comprises:
Assembly 1, audio-frequency test signal generator 100 is responsible for producing the audio-frequency test signal.This signal can be analyzed and discerned by audio frequency latency measurement unit.
Assembly 2, voice-frequency-multichannel acquisition module 200 is responsible for the MCVF multichannel voice frequency test signal that input separates or mixes, and with the audio signal input audio frequency time-delay measuring unit that collects.
Assembly 3, audio frequency time-delay measuring unit 300 is responsible for the audio signal of input is analyzed, discerns, compared and measures, and concrete steps comprise:
(1) step 1; Mixed multiplex audio-frequency test signal to the input of voice-frequency-multichannel acquisition module is analyzed; Because the audio-frequency test signal after postponing unavoidably has noise jamming; Need from mixed signal, to recognize the pairing time point of starting point, peak value of audio-frequency test signal exactly, and note.
(2) step 2 is compared the some time of advent of the audio-frequency test signal after the delay of noting with the some time of advent of the audio-frequency test signal that directly is received from signal generator, calculate both differences, divided by 2, as the audio frequency end-to-end delay of reality.
(3) step 3, the audio frequency end-to-end delay from step 2 obtains is submitted to storage and display unit and audio/video synchronization delayed time measuring unit respectively.
Assembly 4, storage and display unit 400 are used for the audio frequency end-to-end time delay that storage shows that said audio frequency time-delay measuring unit (300) is confirmed.
The foregoing description is a preferred implementation of the present invention; But execution mode of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (3)
1. the audio frequency end-to-end time delay method of measurement of the single-ended collection of non-intervention type is characterized in that, comprises following steps:
(1) with the far-end echo elimination/inhibit feature temporary close of system under test (SUT), the far-end microphone near far-end loudspeaker, is constituted the transmission of audio signals loop between local side and far-end;
(2) utilize measuring signal generator to produce the audio-frequency test signal at local side, this test signal is gathered by the microphone of measurement mechanism and system under test (SUT) simultaneously;
(3) from the audio-frequency test signal of measuring signal generator, after the microphone collection by measurement mechanism, directly submit to signal processing module and detect, and note the time of advent of this audio-frequency test signal;
(4) the audio-frequency test signal of gathering by the microphone of system under test (SUT), after treatment, the far-end loudspeaker of system under test (SUT) plays back again;
(5) the audio-frequency test signal of system under test (SUT) far-end loudspeaker broadcast after the far-end microphone collection by system under test (SUT), is sent back to local side after treatment again, and is come out in the local side loudspeaker plays;
(6) the audio-frequency test signal of local side loudspeaker plays is gathered by the microphone of measurement mechanism once more, and submits to signal processing module and detect, and notes the time of advent of this audio-frequency test signal;
(7) signal processing module of measurement mechanism is confirmed audio frequency time delay end to end according to the time of step (3), step (6) record.
2. the audio frequency end-to-end time delay measurement mechanism of the single-ended collection of non-intervention type number is characterized in that comprising:
Assembly 1, audio-frequency test signal generator (100) is responsible for producing the audio-frequency test signal;
Assembly 2, voice-frequency-multichannel acquisition module (200) is responsible for the MCVF multichannel voice frequency test signal that input separates or mixes, and with the audio signal input audio frequency time-delay measuring unit that collects;
Assembly 3, audio frequency time-delay measuring unit (300) is responsible for the audio signal of input is analyzed, discerns, compared and measures, and confirms the audio frequency end-to-end time delay.
3. the audio frequency end-to-end time delay measurement mechanism of the single-ended collection of non-intervention type number is characterized in that: also comprise storage and display unit (400), be used for the audio frequency end-to-end time delay that storage shows that said audio frequency time-delay measuring unit (300) is confirmed.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219029A (en) * | 2013-03-25 | 2013-07-24 | 广东欧珀移动通信有限公司 | Method and system for automatically adjusting synchronization of audio and video |
| CN103532821A (en) * | 2012-07-02 | 2014-01-22 | 腾讯科技（深圳）有限公司 | Comparison testing method for audio transmission time delay of instant messaging software and testing equipment |
| CN104125022A (en) * | 2013-11-27 | 2014-10-29 | 腾讯科技(成都)有限公司 | Audio transmission delay measuring method and system |
| CN105450882A (en) * | 2015-11-13 | 2016-03-30 | 公安部第三研究所 | Audio conversion characteristic test method |
| CN107331406A (en) * | 2017-07-03 | 2017-11-07 | 福建星网智慧软件有限公司 | A kind of method of dynamic adjustment Echo-delay |
| WO2018120545A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Method and device for testing latency of audio loop |
| CN108566316A (en) * | 2018-04-18 | 2018-09-21 | 百度在线网络技术（北京）有限公司 | Unmanned vehicle delay statistics method, apparatus, equipment and computer-readable medium |
| CN109587542A (en) * | 2018-12-27 | 2019-04-05 | 北京奇艺世纪科技有限公司 | Audio, video data synchronizer, method, data processing equipment, medium |
| CN110691301A (en) * | 2019-09-25 | 2020-01-14 | 晶晨半导体（深圳）有限公司 | Method for testing delay time between far-field voice equipment and external loudspeaker |
| WO2020114369A1 (en) * | 2018-12-05 | 2020-06-11 | 上海众链科技有限公司 | Wireless communication delay test method, device, computer device and storage medium |
| CN111526455A (en) * | 2020-05-21 | 2020-08-11 | 菁音电子科技（上海）有限公司 | Correction enhancement method and system for vehicle-mounted sound |
| CN112489686A (en) * | 2020-12-02 | 2021-03-12 | 公安部第三研究所 | End-to-end audio signal delay testing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050219366A1 (en) * | 2004-03-31 | 2005-10-06 | Hollowbush Richard R | Digital audio-video differential delay and channel analyzer |
| CN1747502A (en) * | 2004-09-09 | 2006-03-15 | 华为技术有限公司 | Tester and test for end to end speech time delay |
-
2011
- 2011-09-09 CN CN2011102681507A patent/CN102325059B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050219366A1 (en) * | 2004-03-31 | 2005-10-06 | Hollowbush Richard R | Digital audio-video differential delay and channel analyzer |
| CN1747502A (en) * | 2004-09-09 | 2006-03-15 | 华为技术有限公司 | Tester and test for end to end speech time delay |
Non-Patent Citations (1)
| Title |
|---|
| MOHAMMAD R ZAD-ISSA ET AL: "METHODS FOR NONE INTRUSIVE DELAY MEASURMENT FOR AUDIO COMMUNICATION OVER PACKET NETWORKS", 《2006 IEEE INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO》 * |
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| CN103532821A (en) * | 2012-07-02 | 2014-01-22 | 腾讯科技（深圳）有限公司 | Comparison testing method for audio transmission time delay of instant messaging software and testing equipment |
| CN103532821B (en) * | 2012-07-02 | 2018-02-13 | 腾讯科技（深圳）有限公司 | A kind of MSN audio transmission delay contrast test method and apparatus |
| CN103219029A (en) * | 2013-03-25 | 2013-07-24 | 广东欧珀移动通信有限公司 | Method and system for automatically adjusting synchronization of audio and video |
| CN104125022B (en) * | 2013-11-27 | 2016-03-23 | 腾讯科技(成都)有限公司 | The method of measurement of audio transmission time delay and system |
| US9755933B2 (en) | 2013-11-27 | 2017-09-05 | Tencent Technology (Shenzhen) Company Limited | Method and system for measuring audio transmission delay |
| WO2015078359A1 (en) * | 2013-11-27 | 2015-06-04 | 腾讯科技（深圳）有限公司 | Method and system for measuring audio transmission delay |
| CN104125022A (en) * | 2013-11-27 | 2014-10-29 | 腾讯科技(成都)有限公司 | Audio transmission delay measuring method and system |
| CN105450882B (en) * | 2015-11-13 | 2018-07-20 | 公安部第三研究所 | A kind of audio conversion characteristic test method |
| CN105450882A (en) * | 2015-11-13 | 2016-03-30 | 公安部第三研究所 | Audio conversion characteristic test method |
| WO2018120545A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Method and device for testing latency of audio loop |
| CN107331406A (en) * | 2017-07-03 | 2017-11-07 | 福建星网智慧软件有限公司 | A kind of method of dynamic adjustment Echo-delay |
| CN108566316A (en) * | 2018-04-18 | 2018-09-21 | 百度在线网络技术（北京）有限公司 | Unmanned vehicle delay statistics method, apparatus, equipment and computer-readable medium |
| WO2020114369A1 (en) * | 2018-12-05 | 2020-06-11 | 上海众链科技有限公司 | Wireless communication delay test method, device, computer device and storage medium |
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| CN112489686A (en) * | 2020-12-02 | 2021-03-12 | 公安部第三研究所 | End-to-end audio signal delay testing method |
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