CN108924725B - Sound effect testing method of vehicle-mounted sound system - Google Patents
Sound effect testing method of vehicle-mounted sound system Download PDFInfo
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- CN108924725B CN108924725B CN201810748571.1A CN201810748571A CN108924725B CN 108924725 B CN108924725 B CN 108924725B CN 201810748571 A CN201810748571 A CN 201810748571A CN 108924725 B CN108924725 B CN 108924725B
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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
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
- B60R11/0217—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers
Abstract
The invention provides a sound effect testing method of a vehicle-mounted sound system, which comprises the steps of obtaining original audio, obtaining audio played by the vehicle-mounted sound system, intercepting the audio in the same time period, carrying out eq sound effect superposition on the original audio, comparing the played audio with the eq sound effect superposed original audio, and finally obtaining a comparison result. And if the noise detection is carried out on the playing system, eq sound effect superposition is not carried out on the original audio, and eq sound effect is not added when the original audio is played. By using the method to test the sound system, whether the noise exceeds the standard or not and whether the eq sound effect reaches the expected standard or not can be accurately detected, the test efficiency is improved, the test cost is reduced, and the tone quality of the playing system can be ensured.
Description
Technical Field
The invention relates to the field of sound effect testing of an audio playing system, in particular to a sound effect testing method of a vehicle-mounted sound system.
Background
The Eq sound effect is specially optimized for a certain type of music by modifying the composition overtone grade of each frequency in the sound, and the music feeling of people is enhanced, wherein the music feeling usually comprises normal music, rock music, pop music, dance music, classical music, softness, jazz, metal, heavy bass and self-definition. At present, various music players have eq sound effect adjustment, and a vehicle-mounted information entertainment system is no exception.
In the development process of the vehicle-mounted information entertainment system, a tester needs to test the output of audio; and testing whether the audio is doped with noise in the output process, and confirming whether the audio output under each eq sound effect mode meets the expected standard. At present, the human ears are usually adopted by testers for distinguishing, the human ears distinguish the defects of individual difference, the hearing acuity of each tester is different, and some slight noises can not be identified through the human ears; and the human ear can not accurately judge whether the playing system reaches the standard under each eq sound effect mode; therefore, a plurality of testers are required to carry out cross test, so that the test efficiency is low, and the cost is high; the sound quality of the playback system cannot be guaranteed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a sound effect testing method of a vehicle-mounted sound system, which comprises the steps of obtaining original audio, obtaining the audio played by the vehicle-mounted sound system, intercepting the audio in the same time period, carrying out eq sound effect superposition on the original audio, comparing the played audio with the eq sound effect superposed original audio, and finally obtaining a comparison result. By using the method to test the sound system, whether the noise exceeds the standard or not and whether the eq sound effect reaches the expected standard or not can be accurately detected, the test efficiency is improved, the test cost is reduced, and the tone quality of the playing system can be ensured.
In order to achieve the technical effects, the invention adopts the following scheme: a sound effect testing method of a vehicle-mounted sound system comprises the following steps:
testing audio playing: playing test audio by using a vehicle-mounted sound system in a noise-free environment;
intercepting a characteristic audio: intercepting an audio signal in a preset time period at a preset time point of a test audio as a characteristic audio signal;
and (3) external audio acquisition: collecting the audio played by the current vehicle-mounted sound system as an external audio, and recording the time delay from the playing of the test audio from a sound source to the output of the vehicle-mounted sound;
and audio interception by comparison: intercepting a comparison audio signal with the same length as the characteristic audio signal from the external audio signal;
and (3) sound effect superposition processing: superposing the intercepted characteristic audio signal with the sound effect same as the sound effect selected during the sound source playing;
audio comparison: comparing the characteristic audio signal before the audio effect is superposed with the comparison audio signal to carry out audio track comparison; the vehicle-mounted sound system does not use eq sound effect; if the track comparison difference is larger than the preset range, the noise exists in the system; comparing the characteristic audio signal with the comparison audio signal after the audio effect is superposed with the audio signal; and if the track comparison difference is larger than the preset range, the sound effect system of the vehicle-mounted information entertainment system does not reach the standard.
Further, in the feature audio capturing, a computer or a smart phone is connected with the vehicle-mounted infotainment system to acquire the feature audio signal stored in the buffer memory of the vehicle-mounted infotainment system and the captured time starting point.
Furthermore, the computer or the smart phone is connected with the vehicle-mounted infotainment system through a data line.
Furthermore, in the external audio acquisition, the audio signals played by the vehicle-mounted sound equipment are acquired by a microphone to serve as external audio.
Furthermore, in the external audio acquisition, the computer or the smart phone is used for reading the buffer memory of the vehicle-mounted infotainment system to record the time delay from the playing of the test audio from the audio source to the output of the vehicle-mounted sound box.
Furthermore, in the audio interception comparison, the interception time starting point of the comparison audio signal is the time point of the characteristic audio signal interception plus the time delay from the playing of the test audio from the sound source to the output of the vehicle-mounted sound.
Further, in the sound effect superposition processing, the sound effect superposition is carried out on the intercepted characteristic audio signal by adopting an audio equalizer algorithm.
Furthermore, the noiseless environment is that the noise decibel value of the environment where the vehicle-mounted sound system is located is lower than a preset value.
After the test is started, when the vehicle-mounted sound system plays test audio, the buffer memory of the vehicle-mounted information entertainment system stores a frame of audio data stream at preset time intervals, and the stored time point is recorded. The time delay from the audio source playing to the vehicle-mounted sound output of the test audio is determined according to the software and hardware platform of the vehicle-mounted sound system, is a fixed value and is also stored in the cache of the vehicle-mounted information entertainment system.
By means of the setting, whether the noise of the vehicle-mounted sound system exceeds the standard or not and whether the eq sound effect reaches the expected standard or not are accurately detected; the testing efficiency is improved, the testing cost is reduced, and the tone quality of the playing system can be ensured.
Drawings
FIG. 1 is a flow chart of the test of the vehicle audio system of the present invention;
FIG. 2 is a diagram of a test system model according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
a sound effect testing method of a vehicle-mounted sound system is characterized in that after a test is started, when a test audio is played by the vehicle-mounted sound system, a buffer memory of the vehicle-mounted information entertainment system stores a frame of audio data stream every preset time, and the stored time point is recorded. The time delay from the audio source playing to the vehicle-mounted sound output of the test audio is determined according to the software and hardware platform of the vehicle-mounted sound system, is a fixed value and is also stored in the cache of the vehicle-mounted information entertainment system.
As shown in fig. 1, the method comprises the steps of:
testing audio playing: playing a test audio by using a vehicle-mounted sound box to be tested in a noise-free environment; specifically, the noiseless environment is that the decibel value of the noise of the environment where the vehicle-mounted sound system is located is lower than a preset value. And connecting the computer or the smart phone with the vehicle-mounted infotainment system to acquire the characteristic audio signals stored in the cache of the vehicle-mounted infotainment system and the intercepted time starting point.
In this embodiment, the computer or the smart phone is connected to the in-vehicle infotainment system through a data line.
Intercepting a characteristic audio: intercepting an audio signal in a preset time period at a preset time point of a test audio as a characteristic audio signal;
and (3) external audio acquisition: collecting the audio played by the current vehicle-mounted sound as an external audio, and recording the time delay from the audio playing of the test audio to the output of the vehicle-mounted sound; specifically, as shown in fig. 2, a microphone is used to collect an audio signal played by a car audio as an external audio; and reading the cache of the vehicle-mounted information entertainment system by using the computer or the smart phone to record the time delay from the playing of the test audio from the sound source to the output of the vehicle-mounted sound.
And audio interception by comparison: intercepting a comparison audio signal with the same length as the characteristic audio signal from the external audio signal; specifically, the time starting point of the interception of the audio signal is compared with the time point of the interception of the characteristic audio signal plus the time delay from the playing of the test audio from the sound source to the output of the vehicle-mounted sound.
And (3) sound effect superposition processing: superposing the intercepted characteristic audio signal with the sound effect same as the sound effect selected during the sound source playing; specifically, an audio equalizer algorithm is adopted to perform sound effect superposition on the intercepted characteristic audio signals.
Audio comparison: comparing the characteristic audio signal before the audio effect is superposed with the comparison audio signal to carry out audio track comparison; if the track comparison difference is larger than the preset range, the noise exists in the system; comparing the characteristic audio signal with the comparison audio signal after the audio effect is superposed with the audio signal; and if the track comparison difference is larger than the preset range, the sound effect system of the vehicle-mounted information entertainment system does not reach the standard.
Therefore, whether the noise of the vehicle-mounted sound system exceeds the standard or not and whether the eq sound effect reaches the expected standard or not are accurately detected; the testing efficiency is improved, the testing cost is reduced, and the tone quality of the playing system can be ensured.
The foregoing is a preferred embodiment of the present invention, and it should be noted that other sound effect testing methods including the vehicle-mounted sound system may be implemented by those skilled in the art without departing from the principle of the present invention, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (8)
1. A sound effect testing method of a vehicle-mounted sound system is characterized by comprising the following steps:
testing audio playing: playing test audio by using a vehicle-mounted sound system in a noise-free environment;
intercepting a characteristic audio: intercepting an audio signal in a preset time period at a preset time point of a test audio as a characteristic audio signal;
and (3) external audio acquisition: collecting the audio played by the current vehicle-mounted sound system as an external audio, and recording the time delay from the playing of the test audio from a sound source to the output of the vehicle-mounted sound;
and audio interception by comparison: intercepting a comparison audio signal with the same length as the characteristic audio signal from the external audio signal, wherein the intercepting time starting point of the comparison audio signal is the time point of the interception of the characteristic audio signal plus the time delay from the playing of the test audio from the sound source to the output of the vehicle-mounted sound equipment;
and (3) sound effect superposition processing: superposing the intercepted characteristic audio signal with the sound effect same as the sound effect selected during the sound source playing;
audio comparison: comparing the characteristic audio signal before the audio effect is superposed with the comparison audio signal to carry out audio track comparison; the vehicle-mounted sound system does not use eq sound effect; if the track comparison difference is larger than the preset range, the noise exists; comparing the characteristic audio signal with the comparison audio signal after the audio effect is superposed with the audio signal; and if the track comparison difference is larger than the preset range, the sound effect system of the vehicle-mounted information entertainment system does not reach the standard.
2. The sound effect testing method of the vehicle-mounted sound system according to claim 1, characterized in that in the characteristic audio capturing, a computer or a smart phone is used to connect with the vehicle-mounted infotainment system to obtain the characteristic audio signal stored in a buffer memory of the vehicle-mounted infotainment system and a time starting point of capturing.
3. The sound effect testing method of the vehicle-mounted sound system according to claim 2, wherein the computer or the smart phone is connected with the vehicle-mounted infotainment system through a data line.
4. The sound effect testing method of the vehicle audio system according to claim 3, wherein the step of collecting the external audio comprises collecting audio signals played by the vehicle audio system by a microphone as the external audio.
5. The sound effect testing method of the vehicle audio system according to claim 4, wherein in the external audio collection, the method comprises reading a buffer memory of the vehicle infotainment system by using the computer or the smart phone to record the time delay from the audio source playing to the vehicle audio output of the test audio.
6. The sound effect testing method of the vehicle-mounted sound system according to claim 1, wherein in the step of intercepting the comparison audio, the intercepting time starting point of the comparison audio signal is the time point of intercepting the characteristic audio signal plus the time delay from the playing of the test audio from the sound source to the output of the vehicle-mounted sound.
7. The sound effect testing method of the vehicle-mounted sound system according to claim 1, characterized in that in the sound effect superposition processing, an audio equalizer algorithm is adopted to carry out sound effect superposition on the intercepted characteristic audio signal.
8. The method for testing sound effect of a car audio system according to claim 1, wherein the noiseless environment is an environment in which a decibel value of noise of the car audio system is lower than a preset value.
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| CN110379442A (en) * | 2019-05-31 | 2019-10-25 | 惠州市德赛西威汽车电子股份有限公司 | A kind of onboard instruments buzzing detection method, apparatus and system |
| CN114666631B (en) * | 2020-12-23 | 2024-04-26 | 华为技术有限公司 | Sound effect adjusting method and electronic equipment |
| CN115567844B (en) * | 2022-09-28 | 2024-05-03 | 浙江越扬电子有限公司 | Self-adaptive equalizer compensation method and system for vehicle-mounted sound equipment |
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