CN112866893A - Method for testing audio delay of Bluetooth headset - Google Patents
Method for testing audio delay of Bluetooth headset Download PDFInfo
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- CN112866893A CN112866893A CN202011544939.6A CN202011544939A CN112866893A CN 112866893 A CN112866893 A CN 112866893A CN 202011544939 A CN202011544939 A CN 202011544939A CN 112866893 A CN112866893 A CN 112866893A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000035772 mutation Effects 0.000 claims description 41
- 238000005070 sampling Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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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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- 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
- H04B17/364—Delay profiles
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- H04B5/73—
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
Abstract
The invention discloses a method for testing audio delay of a Bluetooth headset, which comprises the following steps: s1, preparing before testing, preparing two testing mobile phones and one earphone to be tested, and marking the two testing mobile phones as a mobile phone A and a mobile phone B; s2, performing Bluetooth signal connection, and performing Bluetooth signal connection on the mobile phone A and a Bluetooth headset; s3, recording videos, playing the specially processed videos by using the mobile phone A, starting the camera shooting function by using the mobile phone B, and recording the video playing process of the mobile phone A and the videos of the sound emitted from the sound listening hole of the Bluetooth headset by using the camera of the mobile phone B; s4, video analysis; s5, acquiring a time delay value; s6, calculating a final time delay value; the invention can test the audio time delay of the Bluetooth headset through the two test mobile phones, does not need to adopt precise equipment instruments, reduces the cost of the test equipment to a certain extent, does not increase the queuing time due to various test items, and brings convenience to the quick iteration test of the version.
Description
Technical Field
The invention belongs to the technical field of audio time delay testing of Bluetooth earphones, and particularly relates to a method for testing audio time delay of a Bluetooth earphone.
Background
With the rapid development of the earphone industry, the earphone slowly enters the Bluetooth era from a wired or head-mounted earphone, and the Bluetooth earphone converts sound into electromagnetic waves by a microphone, transmits the electromagnetic waves to an earphone of a receiving end by using a Bluetooth communication system, and then converts the electromagnetic waves into sound; in recent years, the development of the bluetooth headset is rapid, and related performance parameters are continuously improved; in the functions of playing games, watching videos and the like, many earphones attempt to reduce the delay maximally to meet the requirement of audio-visual synchronization, so that many low-delay algorithms such as HWA LHDC, APTX-LL and the like are promoted.
However, in the prior art, in the actual development test, because iteration of many software versions is involved, if each low-delay test is performed, an accurate device is adopted, and the cost requirement on the device is high; in addition, even if the device is provided, the queuing time is increased due to various test items, and the quick iterative test of the version is not facilitated.
Therefore, a method for testing the audio delay of the Bluetooth headset is provided to solve the problems in the prior art, so that the cost of equipment for testing the delay of the Bluetooth headset can be reduced, and meanwhile, the quick iteration test of the version can be facilitated.
Disclosure of Invention
The invention aims to provide a method for testing audio delay of a Bluetooth headset, which aims to solve the problems that in the prior art, in the actual development and test, because iteration of a plurality of software versions is involved, if each time of low-delay test is carried out, an accurate device is adopted, and the cost requirement on equipment is higher; in addition, even if equipment exists, the queuing time can be increased due to the test items of multiple models, the problem of quick iteration test of the version is not facilitated, the Bluetooth headset audio time delay can be tested through two test mobile phones, an accurate equipment instrument does not need to be adopted, the cost of the test equipment is reduced to a certain extent, the queuing time can not be increased due to the test items of the multiple models, and convenience is brought to the quick iteration test of the version.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for testing audio delay of a Bluetooth headset comprises the following steps:
s1, preparing before testing, preparing two testing mobile phones and one earphone to be tested, and marking the two testing mobile phones as a mobile phone A and a mobile phone B;
s2, performing Bluetooth signal connection, and performing Bluetooth signal connection on the mobile phone A and a Bluetooth headset;
s3, recording videos, playing the specially processed videos by using the mobile phone A, starting the camera shooting function by using the mobile phone B, and recording the video playing process of the mobile phone A and the videos of the sound emitted from the sound listening hole of the Bluetooth headset by using the camera of the mobile phone B;
s4, video analysis, mobile phone B starting algorithm analysis, and obtaining image mutation points and audio mutation points through the recorded video;
s5, acquiring a time delay value, and acquiring the time delay estimation of the Bluetooth headset according to the time difference between the audio mutation point and the image mutation point;
and S6, calculating a final time delay value, repeating the steps S3-S5 to sample for multiple times to calculate the time delay value, and taking the average value of the multiple times of calculated time delay values as the final time delay value of the test.
Preferably, the mobile phone a in step 1 is set as a smart phone capable of playing video and bluetooth signal connection, and the mobile phone B is set as a smart phone with algorithm analysis.
Preferably, the specially processed video in step 3 is a video with synchronous sound and image, the mobile phone B has no time delay when recording the video played in the mobile phone a, the sound has time delay after passing through a bluetooth link between the mobile phone a and a bluetooth headset, and the time delay value of the bluetooth headset is calculated through the video recorded by the mobile phone B, and the special video includes a sudden hammer hitting a desktop, a shooting scene, a shooting field, an automobile collision and a strange startle scene.
Preferably, the video abrupt change point in the step 4 refers to the jump from one scene to another scene, and the video abrupt change point includes a knocking sound, a striking sound and a shooting sound; the sound mutation point refers to the jump from no to any, and the sound mutation point comprises the switching from black background to white background, no light to light and the damage of the intact surface of an object.
Preferably, the algorithm analysis in step 4 includes image algorithm analysis and audio algorithm analysis, the time T1 of the image mutation point is obtained during the image algorithm analysis, and the time T2 of the audio mutation point is obtained during the audio algorithm analysis.
Preferably, the time difference is set to T in step 5, and the time difference is calculated by subtracting the time T1 of acquiring the video mutation point from the time T2 of acquiring the audio mutation point, i.e., T2-T1.
Preferably, the sampling in step 6 refers to recording the video playing process of the mobile phone a and the video of the sound emitted from the sound listening hole of the bluetooth headset through the camera of the mobile phone B, and sampling for at least ten times to obtain the average value of T.
Preferably, the unit of the delay in steps 5-6 is set to ms, the range of the delay value is 150ms-250ms, and if the delay value exceeds the upper limit, the perceived phenomenon of asynchronism between audio and video occurs, so that the tested delay value has errors.
Preferably, in the step 6, in order to reduce the error of single measurement when the final delay value is calculated, the final delay value may be estimated by removing singular values and averaging the values through multiple measurements, where the singular value refers to a value with a large difference in value among the delay values calculated multiple times.
Compared with the prior art, the method for testing the audio delay of the Bluetooth headset has the following advantages that:
the invention mainly carries on the bluetooth signal connection with the bluetooth earphone in the first, use the mobile phone A to broadcast the video after the special treatment, the mobile phone B starts the function of making a video recording, and use the camera of the mobile phone B to record the video of the mobile phone A video broadcasting process and the video that sends out the sound from the bluetooth earphone listening hole, the mobile phone B starts the algorithm analysis, and obtain the image catastrophe point and the audio catastrophe point through the video recorded, through the time difference of the audio catastrophe point and the image catastrophe point, obtain the estimate of the bluetooth earphone time delay, calculate the time delay value through sampling many times in order to improve the test accuracy, take the average value of the time delay value of calculating many times as the final time delay value tested, can test the bluetooth earphone audio delay through two test mobile phones, do not need to adopt the accurate apparatus, reduce the cost of the test equipment to a certain extent, and will not, and queuing time is increased, so that convenience is brought to quick iteration test of the version.
Drawings
FIG. 1 is a flow chart of a method of testing audio delay of a Bluetooth headset according to the present invention;
fig. 2 is a flow chart of the delay value calculation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a method for testing audio delay of a Bluetooth headset, which comprises the following steps:
s1, preparing before testing, preparing two testing mobile phones and one earphone to be tested, and marking the two testing mobile phones as a mobile phone A and a mobile phone B;
s2, performing Bluetooth signal connection, and performing Bluetooth signal connection on the mobile phone A and a Bluetooth headset;
s3, recording videos, playing the specially processed videos by using the mobile phone A, starting the camera shooting function by using the mobile phone B, and recording the video playing process of the mobile phone A and the videos of the sound emitted from the sound listening hole of the Bluetooth headset by using the camera of the mobile phone B;
s4, video analysis, mobile phone B starting algorithm analysis, and obtaining image mutation points and audio mutation points through the recorded video;
s5, acquiring a time delay value, and acquiring the time delay estimation of the Bluetooth headset according to the time difference between the audio mutation point and the image mutation point;
s6, calculating a final time delay value, repeating the steps S3-S5 to sample for multiple times to calculate the time delay value, and taking the average value of the multiple times of calculated time delay values as the final time delay value of the test;
the mobile phone A in the step 1 is set as a smart phone capable of playing video and Bluetooth signal connection, and the mobile phone B is set as a smart phone with algorithm analysis;
the specially processed video in the step 3 is a video with synchronous sound and image, the mobile phone B has no time delay when recording the video played in the mobile phone A, the sound has time delay after passing through a Bluetooth link between the mobile phone A and a Bluetooth headset, audio break points and image break points in the recorded video have time difference, the time difference is the time delay in the Bluetooth transmission process, the Bluetooth headset time delay value is calculated through the video recorded by the mobile phone B, and the special video comprises a sudden hammer hitting desktop, a sudden gunshot scene, a shooting field, a car collision, a strange frightening scene and the like;
the image mutation point in the step 4 refers to the jump from one scene to another scene, and the image mutation point comprises knocking, impact sound and shooting sound; the sound mutation point is the jump from no to some, and comprises the steps of switching from black background to white background, switching from no light to light, and damaging the surface of an object when the surface of the object is intact;
the algorithm analysis in the step 4 comprises image algorithm analysis and audio algorithm analysis, the time T1 of the image mutation point is obtained during the image algorithm analysis, and the time T2 of the audio mutation point is obtained during the audio algorithm analysis;
the time difference in the step 5 is set to be T, and the time difference is calculated by subtracting the time T1 of acquiring the video mutation point from the time T2 of acquiring the audio mutation point, namely T2-T1;
the sampling in the step 6 means that the video playing process of the mobile phone A and the video which is sent out from the sound listening hole of the Bluetooth headset are recorded through the camera of the mobile phone B, and sampling is carried out at least ten times to obtain the average value of T;
the unit of the time delay in the step 5-6 is set to be ms, the range of the time delay value is 150ms-250ms, and if the time delay value exceeds the upper limit, the perceived phenomenon that the audio frequency and the video are asynchronous can occur, so that errors exist in the tested time delay value, and the experience effect of the Bluetooth headset is influenced;
in the step 6, in order to reduce the error of single measurement when the final delay value is calculated, the final delay value can be estimated by removing singular values and averaging the values through multiple measurements, wherein the singular values refer to numerical values with large value differences among the delay values calculated multiple times.
In sum, the video playing process of the mobile phone A and the video which is sent out through the sound listening hole of the Bluetooth headset are recorded through the camera of the mobile phone B, the mobile phone B starts algorithm analysis, the image mutation point and the audio mutation point are obtained through the recorded video, the estimation of the time delay of the Bluetooth headset is obtained through the time difference between the audio mutation point and the image mutation point, the time delay value is calculated through multiple sampling for improving the test accuracy, the average value of the multiple calculated time delay values is taken as the final time delay value of the test, the audio time delay of the Bluetooth headset can be tested through the two test mobile phones, accurate equipment does not need to be adopted, and the cost of test equipment is reduced to a certain extent.
Example 2
According to the method for testing the audio delay of the Bluetooth headset, provided by the invention, the final delay of 5 groups of Bluetooth headsets is actually tested, and the test results are as follows:
in summary, 5 groups of bluetooth headsets are taken to perform audio delay test by the method for testing the audio delay of the bluetooth headset provided by the invention, the test range of the delay value of the bluetooth headset can be obtained from the actually tested delay value within 150ms-250ms, and the time of the final delay value is also within 150ms-250 ms.
The working principle is as follows: firstly, the mobile phone A is connected with a Bluetooth earphone through Bluetooth signals, the video which is processed specially is played by the mobile phone A, the camera function of the mobile phone B is started by the mobile phone B, the camera of the mobile phone B is used for recording the video playing process of the mobile phone A and the video which is emitted from the sound listening hole of the Bluetooth earphone, the mobile phone B is started to analyze the algorithm, the image mutation point and the audio mutation point are obtained through the recorded video, the estimation of the time delay of the Bluetooth earphone is obtained through the time difference between the audio mutation point and the image mutation point, the time delay value is calculated through multiple sampling for improving the test accuracy, the average value of the multiple calculated time delay values is taken as the final time delay value of the test, the audio delay of the Bluetooth earphone can be tested through two test mobile phones, an accurate equipment instrument does not need to be adopted, the cost of the test equipment is reduced to a certain extent, and the queuing time, and the method brings convenience to the quick iterative test of the version.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. A method for testing audio delay of a Bluetooth headset is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing before testing, preparing two testing mobile phones and one earphone to be tested, and marking the two testing mobile phones as a mobile phone A and a mobile phone B;
s2, performing Bluetooth signal connection, and performing Bluetooth signal connection on the mobile phone A and a Bluetooth headset;
s3, recording videos, playing the specially processed videos by using the mobile phone A, starting the camera shooting function by using the mobile phone B, and recording the video playing process of the mobile phone A and the videos of the sound emitted from the sound listening hole of the Bluetooth headset by using the camera of the mobile phone B;
s4, video analysis, mobile phone B starting algorithm analysis, and obtaining image mutation points and audio mutation points through the recorded video;
s5, acquiring a time delay value, and acquiring the time delay estimation of the Bluetooth headset according to the time difference between the audio mutation point and the image mutation point;
and S6, calculating a final time delay value, repeating the steps S3-S5 to sample for multiple times to calculate the time delay value, and taking the average value of the multiple times of calculated time delay values as the final time delay value of the test.
2. The method of claim 1, wherein the method comprises: the mobile phone A in the step 1 is set as a smart phone capable of playing video and Bluetooth signal connection, and the mobile phone B is set as a smart phone with algorithm analysis.
3. The method of claim 2, wherein the method comprises: the specially processed video in the step 3 is a video with synchronous sound and image, no time delay exists when the mobile phone B records the video played in the mobile phone A, time delay exists after the sound passes through a Bluetooth link between the mobile phone A and a Bluetooth headset, the time delay value of the Bluetooth headset is calculated through the video recorded by the mobile phone B, and the special video comprises a sudden hammer hitting desktop, a sudden gunshot scene, a shooting field, a car collision and a strange startle scene.
4. The method of claim 3, wherein the method comprises: the image mutation point in the step 4 refers to the jump from one scene to another scene, and the image mutation point comprises knocking, impact sound and shooting sound; the sound mutation point refers to the jump from no to any, and the sound mutation point comprises the switching from black background to white background, no light to light and the damage of the intact surface of an object.
5. The method of claim 4, wherein the method comprises: the algorithm analysis in the step 4 comprises image algorithm analysis and audio algorithm analysis, the time T1 of the image mutation point is obtained during the image algorithm analysis, and the time T2 of the audio mutation point is obtained during the audio algorithm analysis.
6. The method of claim 5, wherein the method comprises: the time difference is set to T in step 5, and is calculated by subtracting the time T1 of acquiring the video mutation point from the time T2 of acquiring the audio mutation point, i.e., T2-T1.
7. The method of claim 6, wherein the method comprises: in the step 6, the sampling refers to recording the video playing process of the mobile phone A and the video which is sent out from the sound listening hole of the Bluetooth headset through the camera of the mobile phone B, and sampling is carried out at least ten times to obtain the average value of T.
8. The method of claim 7, wherein the method further comprises: the unit of the time delay in the steps 5-6 is set as ms, the range of the time delay value is 150ms-250ms, and if the time delay value exceeds the upper limit, the phenomenon of perceived asynchrony of audio and video can occur, so that errors exist in the tested time delay value.
9. The method of claim 8, wherein the method further comprises: in step 6, in order to reduce the error of single measurement when the final delay value is calculated, the final delay value can be evaluated by removing singular values and averaging the values through multiple measurements, wherein the singular values refer to numerical values with large value differences among the delay values calculated multiple times.
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| CN113179477A (en) * | 2021-06-30 | 2021-07-27 | 杭州兆华电子有限公司 | LHDC earphone testing method and system |
| CN114554384A (en) * | 2022-04-11 | 2022-05-27 | 深圳市得自在科技有限公司 | Anti-interference performance test system for Bluetooth headset |
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