CN112489684A - End-to-end audio signal communication conversion detection method - Google Patents
End-to-end audio signal communication conversion detection method Download PDFInfo
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- CN112489684A CN112489684A CN202011391113.0A CN202011391113A CN112489684A CN 112489684 A CN112489684 A CN 112489684A CN 202011391113 A CN202011391113 A CN 202011391113A CN 112489684 A CN112489684 A CN 112489684A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
Abstract
The invention relates to the technical field of audio test, and provides an end-to-end audio signal communication conversion detection method.A second audio analyzer of a receiving module measures a first time period required by the fact that the sound amplitude of feedback information sent by the receiving module to an audio channel is lower than a first preset value after a test signal generated by a first audio signal generator reaches the receiving module through first time delay, calculates conversion time according to the first time period and the first time delay, and judges whether the conversion performance is good or not according to the conversion time.
Description
Technical Field
The invention relates to the technical field of audio test, in particular to an end-to-end audio signal communication conversion detection method.
Background
At present, there are many digital end-to-end devices without standard interfaces or non-standard transmission protocols or adopting encryption technology, and the existing electroacoustic test method can not carry out effective test and can only adopt end-to-end whole-course acoustic signal test. The house security technology guard product building intercom system is taken as an example, and due to the fact that a transmission protocol is nonstandard and an interface is nonstandard, testing of voice quality can only be conducted through whole-course acoustic testing. For example, in a home building interphone, when a sending module requests information to a receiving module, the sending module needs to transmit the information to the receiving module through a system network of an audio channel, after a certain delay, the receiving module sends feedback information to the request information sent by the sending module after receiving the request information of the sending module, and one operation that needs to be executed before the sending module receives the request information and sends the feedback information is the conversion of a conversion device, especially for a non-duplex channel communication device, where there is a requirement for the switching device to be turned on, when the switching device is turned on too early, the request sent by the sending module is not completely received and is converted, and if the request is too late, the beginning part of the feedback information sent by the receiving module cannot be sent to the sending module, so that a requirement for the conversion characteristic of audio is needed, before the requirements are met, testing for the conversion characteristics becomes an essential step.
Therefore, the method for efficiently completing the characteristics of audio in the communication conversion process becomes a big problem for those skilled in the art.
Disclosure of Invention
In view of the above problems, the present invention provides an end-to-end audio signal communication conversion detection method, in which after a test signal generated by a first audio signal generator reaches a receiving module after a first time delay, a second audio analyzer of the receiving module measures a first time period required by the receiving module to send feedback information until the sound amplitude in an audio channel is lower than a first preset value, calculates conversion time according to the first time period and the first time delay, and determines whether conversion performance is good or not according to the conversion time, and the technical scheme specifically includes:
a method for detecting end-to-end audio signal communication transition, wherein the method comprises:
providing an audio channel communication system comprising a sending module, a system network, a receiving module and a conversion device, wherein the sending module comprises a first audio signal generator, a first local interphone and a second audio analyzer;
the first audio signal generator generates and sends a test signal group to the first local interphone, and the first local interphone sends the received test signal group to the receiving module through the system network; the first simulation mouth of the sending module balances the test signal group, and the test signal is sent to the receiving module after first time delay;
the receiving module end receives the test signal group, the conversion device executes conversion operation, and the receiving module outputs feedback information to the second audio analyzer according to the test signal group;
the second audio analyzer acquires a first time period of transmission of the feedback information in the audio channel communication system, wherein the first time period is a time period from the time when the receiving module sends the feedback information to the time when the amplitude of sound of the feedback information in the audio channel communication system is smaller than a first preset value;
obtaining a second time delay from the sending of the feedback information by the receiving module to the receiving of the feedback information by the receiving module, and defining deduction of the second time delay from the first time period as a conversion time;
and comparing the conversion time with a preset first threshold, if the conversion time is not greater than the first threshold, meeting the requirement, otherwise, if the conversion time does not meet the requirement, optimizing the conversion device.
In the above method for detecting end-to-end audio signal communication conversion, before the second audio analyzer receives the feedback information, the feedback information passes through a microphone.
In the above method for detecting end-to-end audio signal communication conversion, the microphone is a free-field microphone.
In the method for detecting end-to-end audio signal communication transition, the first audio signal generator further generates a pre-test signal set before the first audio signal generator generates the test signal set.
In the method for detecting end-to-end audio signal communication conversion, the set of pretest signals includes 3 pretest signals.
In the method for detecting end-to-end audio signal communication conversion, the set of pretest signals includes 9 pretest signals.
In the above method for detecting end-to-end audio signal communication conversion, the first time delay is equal to the second time delay.
The technical scheme has the following advantages or beneficial effects:
according to the technical scheme, the conversion performance of the audio is effectively obtained through the test, the problem of audio signal loss caused by conversion in advance or delayed conversion of conversion equipment is effectively solved, the method is simple and easy to implement, the efficiency is high, and the reliability of the whole system is effectively improved.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
FIG. 1 is a flow chart of a method for detecting audio signal communication transition according to an embodiment of the present invention;
FIG. 2 is a block diagram of a set of test signals according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a set of test signals according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a test process according to an embodiment of the present invention.
Detailed Description
Referring to the structure shown in fig. 1, the present invention provides an end-to-end audio signal communication conversion detection method, which mainly includes:
providing an audio channel communication system comprising a sending module, a system network, a receiving module and a conversion device;
a first audio signal generator of the sending module generates a test signal group, and a first local interphone of the sending module sends the test signal to the receiving module through a system network;
after the first time delay, the receiving module receives the test signal group, gives feedback information to the test signal and sends the feedback information to the sending module through the system network;
a second audio analyzer of the sending module receives the feedback information, and the second audio analyzer calculates a first time period required by the fact that the sound amplitude of the feedback information sent from the receiving module to the audio channel communication system is lower than a first preset value (the first preset value is 3dB lower than the amplitude of sound which can be conducted to ears normally);
the receiving module sends the feedback information to a second time delay when the receiving module receives the feedback information, and the second time delay is deducted from the first time period to obtain conversion time;
judging the conversion time, if the conversion time is not greater than the first threshold value, meeting the requirement, otherwise, if the conversion time does not meet the requirement, optimizing the conversion device.
In the end-to-end audio signal communication conversion detection method, the first audio signal generator generates a test signal group, and the method further comprises the following steps before the first local interphone receives the test signal group: the first simulated mouth equalizes the set of test signals.
Preferably, the first time delay is equal to the second time delay.
Preferably, before the second audio analyzer receives the feedback information, the feedback information is transmitted by a microphone.
On the basis, the microphone is a free-field microphone.
Preferably, in the method, the first audio signal generator further generates a set of pre-test signals before the first audio signal generator generates the set of test signals.
Based on this, further, the set of pretest signals includes 3 or 9 pretest signals.
Two specific examples are listed below:
the first embodiment is as follows:
referring to the structure shown in fig. 2, a pre-test signal group of 9 pre-test signals is generated before the first audio signal generator of the transmitting module generates the test signals, so as to test the performance of the audio channel, in this embodiment, the duration of the pre-test signal and the duration of the test signal are both 248.62ms, the time interval between two adjacent pre-test signals and the time interval between the last pre-test signal in the set of pre-test signals and the test signal are both 101.38ms, and therefore, in this embodiment, the time of a set of test signals (including the time in the set of pre-test signals and the time of the test signals) is 3398.62ms, after the first audio signal generator of the transmitting module finishes transmitting the pre-test signals in the set of pre-test signals, and sending a test signal group, wherein the test signal group is transmitted to the local interphone after being balanced by the first simulation nozzle, and the local interphone sends the balanced test signal to the receiving module through the system network.
The second embodiment is as follows:
referring to the structure shown in fig. 3, a pre-test signal group of 3 pre-test signals is generated before the first audio signal generator of the transmitting module generates the test signals, so as to test the performance of the audio channel, in this embodiment, the duration of the pre-test signal and the duration of the test signal are both 248.62ms, the time interval between two adjacent pre-test signals and the time interval between the last pre-test signal in the set of pre-test signals and the test signal are both 101.38ms, and therefore, in this embodiment, the time of a set of test signals (including the time in the set of pre-test signals and the time of the test signals) is 1298.62ms, after the first audio signal generator of the transmitting module finishes transmitting the set of pre-test signals in the set of pre-test signals, and sending a test signal, wherein the test signal is transmitted to the local interphone after being balanced by the first simulation nozzle, and the local interphone sends the balanced test signal to the receiving module through the system network.
Referring to the structure shown in fig. 4, after the first time delay TD1, the receiving module sends the feedback information for the test signal after receiving the test signal set sent by the sending module, and after the receiving module finishes receiving the test signal sent by the sending module, before the receiving module sends the feedback information, the conversion of the conversion device needs to be completed, and the conversion of the conversion device needs to be completed after the receiving module finishes receiving the test signal sent by the sending module, and before the receiving module sends the feedback information, so as to ensure that the test signal sent by the sending module is completely received by the receiving module, and at the same time, the feedback information sent by the receiving module can be more completely transmitted to the sending module.
Here, the time period elapsed from the test signal being received by the receiving module to the feedback signal being received by the transmitting module includes the second time delay TD2 and the switching time Ts, and since the test signal being sent by the transmitting module to the receiving module and the feedback signal being sent by the receiving module to the transmitting module pass through the same system network and both pass through the respective required simulation mouths and microphones, it is preferable that the first time delay is equal to the second time delay, that is, TD1 is equal to TD 2.
Therefore, the conversion time can be obtained by subtracting the first time delay from the first time period required for the test signal to be received by the receiving module until the sound amplitude of the audio channel is 3dB lower than normal, i.e. the conversion time is Ts.
Judging the conversion characteristic of the audio according to the conversion time, setting a threshold value according to the requirement, and when the conversion time is not more than the first threshold value, the audio conversion characteristic is good, otherwise, the audio conversion characteristic does not meet the requirement and the conversion equipment needs to be optimized.
It is proposed that the first simulation mouth is not limited to the simulation mouth of the prior art, but may be a simulation mouth using HATS (Head and shoulder simulator) that meets the requirements of ITU-T P.58< Head and torque simulator for telephone try >. The testing method is not changed, only the composition of the detection system is changed into that HATS is adopted for voice output and voice collection at two ends, HATS is a large number of simulators adopted in the current mobile phone test, and a microphone and a simulation mouth are arranged in the head of the simulators.
Meanwhile, the sending module can be a calling machine arranged at the doorway of the building intercom system, and can also be a receiver arranged indoors, meanwhile, the system can be a management device installed in a security room, the sending module is not limited to a certain device, meanwhile, when the sending module is a calling machine at the door of the building intercom system, the receiving module is a receiver arranged indoors or a management device arranged in a security room, when the sending module is a receiver installed indoors, the receiving module is a calling machine of a building intercom system or a management device installed in a security room, when the transmitting module is a management device installed in a security room, the receiving module is a receiver installed indoors or a caller in a building intercom system, that is, in the end-to-end transmission, the sending module and the receiving module are only for sound signals, and are not limited to a certain device.
It should be noted that the audio conversion characteristic test method is not only applicable to the digital building intercom system, but also applicable to the conventional end-to-end non-standard interface, non-standard transmission protocol and delay test of encrypted transmission, and the digital building intercom system is only a preferred embodiment and is not a limitation on the invention.
In summary, in the present invention, after the test signal generated by the first audio signal generator reaches the receiving module after the first time delay, the audio analyzer of the receiving module measures the first time period required by the receiving module to send the feedback information to the audio channel, where the sound amplitude of the audio channel is 3dB lower than normal, calculates the conversion time according to the first time period and the first time delay, and determines whether the conversion performance is good or not according to the conversion time.
It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals refer to like elements throughout.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, without affecting the spirit of the invention, using the methods and techniques disclosed above, without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (7)
1. A method for detecting end-to-end audio signal communication transition, the method comprising:
providing an audio channel communication system comprising a sending module, a system network, a receiving module and a conversion device, wherein the sending module comprises a first audio signal generator, a first local interphone and a second audio analyzer;
the first audio signal generator generates and sends a test signal group to the first local interphone, and the first local interphone sends the received test signal group to the receiving module through the system network; the first simulation mouth of the sending module balances the test signal group, and the test signal is sent to the receiving module after first time delay;
the receiving module end receives the test signal, the conversion device executes conversion operation, and the receiving module outputs feedback information to the second audio analyzer according to the test signal;
the second audio analyzer acquires a first time period of transmission of the feedback information in the audio channel communication system, wherein the first time period is a time period from the time when the receiving module sends the feedback information to the time when the amplitude of sound of the feedback information in the audio channel communication system is smaller than a first preset value;
obtaining a second time delay from the sending of the feedback information by the receiving module to the receiving of the feedback information by the receiving module, and defining deduction of the second time delay from the first time period as a conversion time;
and comparing the conversion time with a preset first threshold, if the conversion time is not greater than the first threshold, meeting the requirement, otherwise, if the conversion time does not meet the requirement, optimizing the conversion device.
2. The method for detecting end-to-end audio signal communication transition of claim 1, wherein the feedback information is passed through a microphone before the feedback information is received by the second audio analyzer.
3. The method for end-to-end detection of audio signal communication transition of claim 2, wherein said microphone is a free-field microphone.
4. The method of end-to-end audio signal communication transition detection of claim 1, wherein the first audio signal generator further generates a set of pre-test signals before the first audio signal generator generates the test signals.
5. The method of claim 4, wherein said set of pre-test signals includes 3 pre-test signals.
6. The method of claim 4, wherein said set of pre-test signals includes 9 pre-test signals.
7. The method of claim 1, wherein the first time delay is equal to the second time delay.
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