CN113381899B - Method and system for testing first acoustic delay in screen throwing technology - Google Patents
Method and system for testing first acoustic delay in screen throwing technology Download PDFInfo
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- H04L43/00—Arrangements for monitoring or testing data switching networks
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Abstract
The invention provides a method for testing first acoustic delay in a screen projection technology, which comprises the following steps: step S1, after screen throwing sharing is carried out on original terminal equipment and sharing terminal equipment, a request for recording audio with specified duration is sent to the original terminal equipment and the sharing terminal equipment at the same time; s2, starting sharing the sound content, obtaining audios recorded at two ends of the original end equipment and the sharing end equipment, and carrying out waveform processing on the recorded audios at two ends; step S3, setting noise filtering parameters, traversing a waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, obtaining the occurrence time of the first sound, wherein the waveform array is the occurrence position of the first sound; and S4, subtracting the time of the first sound generated by the original end equipment from the time of the first sound generated by the shared end equipment to obtain an audio delay time difference of screen throwing at two ends, and outputting a test report. The invention realizes automatic test, releases manpower and improves the test efficiency.
Description
Technical Field
The invention relates to the technical field of network communication, in particular to a method and a system for testing first acoustic delay in a screen throwing technology.
Background
The screen throwing is to share the screen through a certain technology and to interact with multiple screens. Specifically, the picture of the device A (mobile phone, computer) is displayed on the other device B (mobile phone, tablet, television) in real time, and the output content comprises various multimedia information such as video, audio, documents and the like, and the real-time operation picture on the device A. For example, 1, after the member is purchased in the alien drama, the mobile terminal can watch the drama in advance than the television terminal, and the small screen is projected onto the large television, so that the experience is improved. For example, 2, screen sharing is carried out at the teacher end and the student end in an intelligent classroom through a screen throwing technology, so that detailed explanation of teaching contents is completed, interactive teaching of teachers and students is realized, and a colorful interactive classroom is created by a power assisting teacher.
The prior art has the defects that: the audio sharing of the screen throwing technology has time delay, the excessive delay can seriously influence the interaction of multiple screens, the delay time of the audio sharing is tested at present, the test scheme is that whether delay is judged by manually listening to the sounds at two ends at the same time, the repeated operation is more wasteful by throwing in the manpower, the efficiency is low, and the mode of manual judgment also has larger error and cannot accurately judge the delay time difference.
Disclosure of Invention
In order to overcome the problems, the invention aims to provide a first acoustic delay test method in a screen throwing technology, so that automatic test is realized, manpower is released, and test efficiency is improved.
The invention is realized by adopting the following scheme: a method for testing a first acoustic delay in a projection screen technique, the method comprising the steps of:
step S1, after screen throwing sharing is carried out on original terminal equipment and sharing terminal equipment, a request for recording audio with specified duration is sent to the original terminal equipment and the sharing terminal equipment at the same time;
s2, starting sharing the sound content, obtaining audios recorded at two ends of the original end equipment and the sharing end equipment, and carrying out waveform processing on the recorded audios at two ends;
step S3, setting noise filtering parameters, traversing a waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, obtaining the occurrence time of the first sound, wherein the waveform array is the occurrence position of the first sound;
and S4, subtracting the time of the first sound generated by the original end equipment from the time of the first sound generated by the shared end equipment to obtain an audio delay time difference of screen throwing at two ends, and outputting a test report.
Further, the step S1 specifically includes the following steps:
step S11, an original terminal device A initiates a screen throwing request to a sharing terminal device B, and the sharing terminal device B receives the request and requests to establish successfully;
step S12, the original terminal equipment A sends a recording request with a designated duration T to the original terminal equipment A and the shared terminal equipment B, the original terminal equipment A and the shared terminal equipment B start recording the sound of the local sound card after receiving the request, and recording files of the original terminal equipment A and the shared terminal equipment B are named as A.wav and B.wav respectively.
Further, the step S2 specifically includes the following steps:
step S21, starting to throw a screen to play audio by the original terminal equipment A;
step S22, after the appointed duration T of recording is reached, the machine finishes recording to obtain recording files A.wav and B.wav, and the sharing terminal equipment B sends the recording files to the original terminal equipment A;
and S23, after the original terminal equipment A receives the recording file, ending audio playing and closing the screen throwing link.
Further, the step S3 specifically includes the following steps: step S31, setting a noise filtering parameter a, and starting to acquire the first sound occurrence time of A.wav;
s32, analyzing the recording file A.wav to obtain an acoustic array and a waveform diagram, wherein the length of the array is LengthA;
step S33, traversing the acoustic wave array to obtain a first value array [ i ] larger than the noise filtering parameter a;
step S34, calculating the time first time a= (i/length a) T of the first sound occurrence of a.wav according to the position of the first sound occurrence, where T is the a.wav duration;
step S35, judging whether the B.wav is resolved, and if the B.wav is not resolved, acquiring the first sound generation time FirstTimeB of the sharing end device B in a mode from step S32 to step S34 of acquiring the FirstTimeA.
The invention also provides a system for testing the first acoustic delay in the screen projection technology, which comprises a request module, a recorded audio module, a waveform processing module and an audio delay time difference acquisition module;
the request module is used for sending a request for recording the audio with the appointed duration to the original terminal equipment and the sharing terminal equipment at the same time after the original terminal equipment and the sharing terminal equipment are subjected to screen projection sharing;
the recording audio module is used for starting to share the sound content, obtaining the audio recorded at the two ends of the original end equipment and the shared end equipment, and carrying out waveform processing on the recorded audio at the two ends;
the waveform processing module is used for setting noise filtering parameters, traversing the waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, the waveform array is the position where the first sound appears, and obtaining the occurrence time of the first sound;
the module for obtaining the audio delay time difference subtracts the time of the first sound obtained by the original terminal equipment from the time of the first sound obtained by the shared terminal equipment to obtain the audio delay time difference of the screen throwing at two ends, and outputs a test report.
Further, the request module is further specifically:
the original end equipment A initiates a screen throwing request to the sharing end equipment B, and the sharing end equipment B receives the request and requests to establish successfully;
the original terminal equipment A sends a recording request with a designated duration T to the original terminal equipment A and the shared terminal equipment B, the original terminal equipment A and the shared terminal equipment B start to record the sound of the local sound card after receiving the request, and the recording files of the original terminal equipment A and the shared terminal equipment B are named as A.wav and B.wav respectively.
Further, the audio recording module is specifically further specifically:
the original terminal equipment A starts to throw a screen to play audio;
after the appointed duration T of the recording is reached, the machine finishes the recording to obtain recording files A.wav and B.wav, and the sharing terminal equipment B sends the recording files to the original terminal equipment A;
and after the original terminal equipment A receives the recording file, ending audio playing and closing the screen throwing link.
Further, the waveform processing module is further specifically: setting a noise filtering parameter a, and starting to acquire the first sound occurrence time of A.wav;
analyzing the recording file A.wav to obtain an acoustic array and a waveform chart, wherein the array length is LengthA;
traversing the acoustic wave array Aray to obtain a first value Aray [ i ] larger than the noise filtering parameter a;
calculating the time first time of occurrence of the first sound of A.wav= (i/LengthA) T, wherein T is the A.wav duration;
and judging whether the wav is resolved or not, and if the wav is not resolved, acquiring the first sound generation time FirstTimeB of the sharing end equipment B in a manner of acquiring FirstTimeA.
The invention has the beneficial effects that: 1. the testing method is realized by repeating time-consuming manual operation and realizing automatically, so that the manpower is released, and the testing efficiency is improved.
2. An innovation is effectively made, the traditional testing limitation is broken through, accurate time delay judgment can be made on the time delay of audio synchronization, and testing quality is improved.
3. The test result information is complete, and the method is convenient for the optimization analysis of the screen throwing delay time.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2 is a flowchart illustrating an automatic recording of audio of a screen-casting process according to an embodiment of the present invention.
Fig. 3 is a flow chart illustrating an audio parsing process according to an embodiment of the invention.
Fig. 4 is a waveform diagram of resolving a.wav according to an embodiment of the present invention.
Fig. 5 is a system schematic block diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a method for testing a first acoustic delay in a screen projection technology according to the present invention includes the following steps:
step S1, after screen throwing sharing is carried out on original terminal equipment and sharing terminal equipment, a request for recording audio with specified duration is sent to the original terminal equipment and the sharing terminal equipment at the same time;
s2, starting sharing the sound content, obtaining audios recorded at two ends of the original end equipment and the sharing end equipment, and carrying out waveform processing on the recorded audios at two ends;
step S3, setting noise filtering parameters, traversing a waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, obtaining the occurrence time of the first sound, wherein the waveform array is the occurrence position of the first sound;
and S4, subtracting the time of the first sound generated by the original end equipment from the time of the first sound generated by the shared end equipment to obtain an audio delay time difference of screen throwing at two ends, and outputting a test report.
The step S1 specifically includes the following steps:
step S11, an original terminal device A initiates a screen throwing request to a sharing terminal device B, and the sharing terminal device B receives the request and requests to establish successfully;
step S12, the original terminal equipment A sends a recording request with a designated duration T to the original terminal equipment A and the shared terminal equipment B, the original terminal equipment A and the shared terminal equipment B start recording the sound of the local sound card after receiving the request, and recording files of the original terminal equipment A and the shared terminal equipment B are named as A.wav and B.wav respectively.
The step S2 specifically includes the following steps:
step S21, starting to throw a screen to play audio by the original terminal equipment A;
step S22, after the appointed duration T of recording is reached, the machine finishes recording to obtain recording files A.wav and B.wav, and the sharing terminal equipment B sends the recording files to the original terminal equipment A;
and S23, after the original terminal equipment A receives the recording file, ending audio playing and closing the screen throwing link.
The step S3 specifically includes the following steps: step S31, setting a noise filtering parameter a, and starting to acquire the first sound occurrence time of A.wav;
s32, analyzing the recording file A.wav to obtain an acoustic array and a waveform diagram, wherein the length of the array is LengthA;
step S33, traversing the acoustic wave array to obtain a first value array [ i ] larger than the noise filtering parameter a;
step S34, calculating a time first time a= (i/Lengtha) T1 of the first sound occurrence of a.wav according to the position of the first sound occurrence, where T1 is a.wav duration;
step S35, judging whether the B.wav is already analyzed, and if the B.wav is not already analyzed, analyzing the recording file B.wav to obtain an acoustic wave array and a waveform chart, wherein the length of the array is Length B;
step S36, traversing the acoustic wave array Aray to obtain a first value Aray [ j ] larger than the noise filtering parameter a;
step S37, calculating the time first time b= (j/Lengthb) T2 of the first sound occurrence of b.wav according to the position of the first sound occurrence, where T2 is the duration of b.wav. The test report includes: a.wav, a.wav play time T1, b.wav play time T2, a.wav first sound occurrence time firsttime a, b.wav first sound occurrence time firsttime b, audio delay time difference, and the like.
The invention is further described with reference to the following specific examples:
as shown in fig. 2, 1.1, a machine a initiates a screen throwing request to a machine B, and the machine B accepts the request and requests that the establishment is successful;
1.2 machine A sends a recording request with a designated duration T to machine A (self) and machine B, after receiving the request, the machines A and B start recording the sound of the sound card of the machine A, and the recording files of the machine A and the machine B are named A.wav and B.wav respectively;
1.3, starting to throw a screen to play audio by the machine A;
1.4, after reaching the recording appointed time T, finishing recording by the machine to obtain recording files A.wav and B.wav, and sending the recording files to the machine A by the machine B;
1.5 after the machine A receives the recording file, ending the audio playing and closing the screen throwing link;
the method is characterized in that a closed loop from a screen throwing sender to a screen throwing receiver when a complete automatic record is thrown is formed, the closed loop is the first part of the whole process from the start of screen throwing to the end of screen throwing, and then recording files A.wav and B.wav are transmitted to a machine A to start an audio analysis part.
As shown in fig. 3, for the process of parsing the audio file:
2.1 setting a noise filtering parameter a, wherein the value of a is 400-600 or-400 to-500; the preferred recommended a value is +/-500, and the first sound occurrence time of A.wav is obtained;
2.2 analyzing the record file A.wav to obtain an acoustic array and a waveform chart (shown in FIG. 4), wherein the array length is LengthA;
2.3 traversing the acoustic array to obtain a first value array [ i ] greater than the noise filtering value;
( Description: the array Aray is the data composing the Y-axis of the waveform diagram, the length LengthA is represented as the length of 0-10s of the X-axis in the diagram, and the X-axis is the time axis T )
2.4 calculating the "first sound" firsttimea= (i/Lengtha) T of a.wav according to the position where the "first sound" appears;
for example, T is equal to 10 seconds, i.e., a.wav duration is 10 seconds, then the 10 second acoustic waveform has 100 values (longtha), and at 11 (i) the acoustic wave is greater than the noise filter value. A.wav "first sound" firsttimea= (11/100) 10=1.1 seconds, the first sound occurring at 1.1 seconds.
2.5 judging whether the B.wav is resolved, if not, repeating the steps 2.2 to 2.4 to obtain the first sound occurrence time FirstTimeB of the B machine;
2.6 calculate machine A and machine B "first sound" occurrence time difference (FirstTimeB-FirstTimeA), resulting in a delay time.
Referring to fig. 5, the invention further provides a system for testing the first acoustic delay in the screen projection technology, where the testing system includes a request module, a recorded audio module, a waveform processing module, and a module for obtaining the audio delay time difference;
the request module is used for sending a request for recording the audio with the appointed duration to the original terminal equipment and the sharing terminal equipment at the same time after the original terminal equipment and the sharing terminal equipment are subjected to screen projection sharing;
the recording audio module is used for starting to share the sound content, obtaining the audio recorded at the two ends of the original end equipment and the shared end equipment, and carrying out waveform processing on the recorded audio at the two ends;
the waveform processing module is used for setting noise filtering parameters, traversing the waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, the waveform array is the position where the first sound appears, and obtaining the occurrence time of the first sound;
the module for obtaining the audio delay time difference subtracts the time of the first sound obtained by the original terminal equipment from the time of the first sound obtained by the shared terminal equipment to obtain the audio delay time difference of the screen throwing at two ends, and outputs a test report.
Wherein, the request module further specifically comprises:
the original end equipment A initiates a screen throwing request to the sharing end equipment B, and the sharing end equipment B receives the request and requests to establish successfully;
the original terminal equipment A sends a recording request with a designated duration T to the original terminal equipment A and the shared terminal equipment B, the original terminal equipment A and the shared terminal equipment B start to record the sound of the local sound card after receiving the request, and the recording files of the original terminal equipment A and the shared terminal equipment B are named as A.wav and B.wav respectively.
The audio recording module specifically further specifically comprises:
the original terminal equipment A starts to throw a screen to play audio;
after the appointed duration T of the recording is reached, the machine finishes the recording to obtain recording files A.wav and B.wav, and the sharing terminal equipment B sends the recording files to the original terminal equipment A;
and after the original terminal equipment A receives the recording file, ending audio playing and closing the screen throwing link.
The waveform processing module is further specifically: setting a noise filtering parameter a, and starting to acquire the first sound occurrence time of A.wav;
analyzing the recording file A.wav to obtain an acoustic array and a waveform chart, wherein the array length is LengthA;
traversing the acoustic wave array Aray to obtain a first value Aray [ i ] larger than the noise filtering parameter a;
calculating the time first time of occurrence of the first sound of A.wav= (i/LengthA) T, wherein T is the A.wav duration;
and judging whether the wav is resolved or not, and if the wav is not resolved, acquiring the first sound generation time FirstTimeB of the sharing end equipment B in a manner of acquiring FirstTimeA.
In a word, the testing method provided by the invention can repeat time-consuming manual operation, and is realized through automation, so that the manpower is released, and the testing efficiency is improved. In addition, the method breaks through the conventional test limitation, can accurately judge the time delay of the audio synchronization, and improves the test quality.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. A method for testing first acoustic delay in screen projection technology is characterized in that: the method comprises the following steps:
step S1, after screen throwing sharing is carried out on original terminal equipment and sharing terminal equipment, a request for recording audio with specified duration is sent to the original terminal equipment and the sharing terminal equipment at the same time; the step S1 specifically comprises the following steps:
step S11, an original terminal device A initiates a screen throwing request to a sharing terminal device B, and the sharing terminal device B receives the request and requests to establish successfully;
step S12, the original terminal equipment A sends a recording request with a designated duration T to the original terminal equipment A and the shared terminal equipment B, the original terminal equipment A and the shared terminal equipment B start recording the sound of the local sound card after receiving the request, and recording files of the original terminal equipment A and the shared terminal equipment B are named as A.wav and B.wav respectively;
s2, starting sharing the sound content, obtaining audios recorded at two ends of the original end equipment and the sharing end equipment, and carrying out waveform processing on the recorded audios at two ends;
step S3, setting noise filtering parameters, traversing a waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, obtaining the occurrence time of the first sound, wherein the waveform array is the occurrence position of the first sound;
the step S3 specifically includes the following steps: step S31, setting a noise filtering parameter a, and starting to acquire the first sound occurrence time of A.wav;
s32, analyzing the recording file A.wav to obtain an acoustic array and a waveform diagram, wherein the length of the array is LengthA;
step S33, traversing the acoustic wave array to obtain a first value array [ i ] larger than the noise filtering parameter a;
step S34, calculating the time first time a= (i/length a) T of the first sound occurrence of a.wav according to the position of the first sound occurrence, where T is the a.wav duration;
step S35, judging whether the B.wav is resolved, if not, acquiring the first sound generation time FirstTimeB of the sharing end equipment B in a mode of acquiring the first TimeA from step S32 to step S34;
and S4, subtracting the time of the first sound generated by the original end equipment from the time of the first sound generated by the shared end equipment to obtain an audio delay time difference of screen throwing at two ends, and outputting a test report.
2. The method for testing the first acoustic delay in the screen projection technology according to claim 1, wherein: the step S2 specifically includes the following steps:
step S21, starting to throw a screen to play audio by the original terminal equipment A;
step S22, after the appointed duration T of recording is reached, the machine finishes recording to obtain recording files A.wav and B.wav, and the sharing terminal equipment B sends the recording files to the original terminal equipment A;
and S23, after the original terminal equipment A receives the recording file, ending audio playing and closing the screen throwing link.
3. A system for testing first acoustic delay in screen projection technology is characterized in that: the test system comprises a request module, a recorded audio module, a waveform processing module and an audio delay time difference acquisition module;
the request module is used for sending a request for recording the audio with the appointed duration to the original terminal equipment and the sharing terminal equipment at the same time after the original terminal equipment and the sharing terminal equipment are subjected to screen projection sharing; the request module is further specifically:
the original end equipment A initiates a screen throwing request to the sharing end equipment B, and the sharing end equipment B receives the request and requests to establish successfully; the original terminal equipment A sends a recording request with a designated duration T to the original terminal equipment A and the shared terminal equipment B, the original terminal equipment A and the shared terminal equipment B start to record the sound of the local sound card after receiving the request, and recording files of the original terminal equipment A and the shared terminal equipment B are named as A.wav and B.wav respectively;
the recording audio module is used for starting to share the sound content, obtaining the audio recorded at the two ends of the original end equipment and the shared end equipment, and carrying out waveform processing on the recorded audio at the two ends;
the waveform processing module is used for setting noise filtering parameters, traversing the waveform array of the audio to obtain a first waveform array which is larger than the noise filtering parameters, namely, the waveform array is the position where the first sound appears, and obtaining the occurrence time of the first sound; the module for acquiring the audio delay time difference subtracts the time of the first sound generated by the original terminal equipment from the time of the first sound generated by the shared terminal equipment to acquire the audio delay time difference of the screen throwing at two ends, and outputs a test report; the waveform processing module is further specifically: setting a noise filtering parameter a, and starting to acquire the first sound occurrence time of A.wav;
analyzing the recording file A.wav to obtain an acoustic array and a waveform chart, wherein the array length is LengthA;
traversing the acoustic wave array Aray to obtain a first value Aray [ i ] larger than the noise filtering parameter a;
calculating the time first time of occurrence of the first sound of A.wav= (i/LengthA) T, wherein T is the A.wav duration;
and judging whether the wav is resolved or not, and if the wav is not resolved, acquiring the first sound generation time FirstTimeB of the sharing end equipment B in a manner of acquiring FirstTimeA.
4. A system for testing a first acoustic delay in a projection screen according to claim 3, wherein: the audio recording module specifically further specifically comprises:
the original terminal equipment A starts to throw a screen to play audio;
after the appointed duration T of the recording is reached, the machine finishes the recording to obtain recording files A.wav and B.wav, and the sharing terminal equipment B sends the recording files to the original terminal equipment A;
and after the original terminal equipment A receives the recording file, ending audio playing and closing the screen throwing link.
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