CN110933486B - Sound distortion control method and device, television and storage medium - Google Patents
Sound distortion control method and device, television and storage medium Download PDFInfo
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- CN110933486B CN110933486B CN201911081544.4A CN201911081544A CN110933486B CN 110933486 B CN110933486 B CN 110933486B CN 201911081544 A CN201911081544 A CN 201911081544A CN 110933486 B CN110933486 B CN 110933486B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
- H04N5/602—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals
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Abstract
The application relates to a method and a device for controlling sound distortion, a television and a storage medium, wherein the method comprises the following steps: collecting audio signals sent by a loudspeaker; performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal; judging whether the distortion degree is smaller than a distortion degree threshold value or not; and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value. The method controls the sound distortion, reduces the distortion degree of the sound played by the equipment, improves the tone quality of the equipment and provides convenience for the use of users.
Description
Technical Field
The present application relates to the field of sound processing technologies, and in particular, to a method and an apparatus for controlling sound distortion, a television, and a storage medium.
Background
The sound effect of the television is always an important technical index for measuring the performance of the television, all audio parameters of the television are debugged by a sound engineer in a fixed test room environment at present, and the debugged audio parameters comprise: sound curves, frequency response corresponding to each sound mode, surround sound, high level sound effect, heavy bass and the like.
The distortion degree is also an important index in audio test. The degree of distortion determines the sound quality, and excessive distortion significantly degrades the sound quality. Generally, the highest distortion of the sound system is the loudspeaker, the minimum distortion degree of the common loudspeaker is more than 1%, and the higher the power is, the higher the distortion is. In addition, the problem of sound distortion may occur in the process of watching television by users due to different factors such as different surrounding environments of the television and different loudspeaker characteristics, so that the user experience is influenced, and negative influence is brought to product brands.
Therefore, the prior art is in need of improvement.
Disclosure of Invention
The technical problem to be solved by the application is to provide a method and a device for controlling sound distortion, a television and a storage medium, so as to reduce the distortion degree of sound played by equipment, improve the tone quality of the equipment and improve the use experience of a user.
In a first aspect, an embodiment of the present application provides a method for controlling sound distortion, where the method includes: collecting audio signals sent by a loudspeaker; performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal; judging whether the distortion degree is smaller than a distortion degree threshold value or not; and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
Optionally, the performing fast fourier transform on the audio signal to obtain a distortion factor of the audio signal includes: sampling the audio signal according to a preset sampling frequency to obtain at least one sampling point data; performing fast Fourier transform calculation on the at least one sampling point data to obtain the amplitude of the fundamental wave and each harmonic; and calculating the distortion degree of the audio signal according to the amplitude of the fundamental wave and each harmonic.
Optionally, the acquiring an audio signal emitted by a speaker includes: and collecting audio signals emitted by the loudspeaker through a sound collector.
Optionally, the reducing the power of the speaker to a preset power if the distortion degree is greater than or equal to the distortion degree threshold includes: reducing the power of the loudspeaker by a step value if the distortion level is greater than or equal to the distortion level threshold; detecting the distortion degree of the audio signal sent by the loudspeaker after the power of the loudspeaker is reduced by the stepping value; judging whether the distortion degree is smaller than the distortion degree threshold value or not; and when the distortion degree is larger than or equal to the distortion degree threshold value, reducing the power of the loudspeaker again according to the stepping value until the power of the loudspeaker is reduced to the preset power.
Optionally, the reducing the power of the speaker to a preset power after the distortion degree is greater than or equal to the distortion degree threshold value includes: acquiring distortion information of the loudspeaker which is distorted; and uploading the distortion information to a server.
Optionally, the sampling the audio signal according to a preset sampling frequency, before obtaining at least one sampling point data, includes: setting a sampling frequency, wherein the sampling frequency is more than twice of the highest frequency in the audio signals.
In a second aspect, an embodiment of the present application provides a device for controlling sound distortion, including: the sound acquisition processing module is used for acquiring audio signals emitted by the loudspeaker; the analysis and calculation distortion degree module is used for carrying out fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal; the dynamic gain control module is used for judging whether the distortion degree is smaller than a distortion degree threshold value or not; and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
Optionally, the apparatus comprises: the audio distortion information feedback module is used for acquiring distortion information of the loudspeaker which is distorted; and uploading the distortion information to a server.
In a third aspect, an embodiment of the present application provides a television, including a memory and a processor, where the memory stores a computer program, and the processor implements the following steps when executing the computer program:
collecting audio signals sent by a loudspeaker;
performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal;
judging whether the distortion degree is smaller than a distortion degree threshold value or not;
and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:
collecting audio signals sent by a loudspeaker;
performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal;
judging whether the distortion degree is smaller than a distortion degree threshold value or not;
and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
Compared with the prior art, the embodiment of the application has the following advantages:
according to the method provided by the embodiment of the application, firstly, audio signals sent by a loudspeaker are collected; then, carrying out fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal; finally, judging whether the distortion degree is smaller than a distortion degree threshold value; and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value. The method controls the sound distortion, reduces the distortion degree of the sound played by the equipment, improves the tone quality of the equipment and provides convenience for the use of users.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flowchart of a method for controlling sound distortion according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an apparatus for controlling sound distortion according to an embodiment of the present application;
fig. 3 is an internal structural diagram of a computer device in the embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The inventor finds that sound distortion may occur in the process of watching television by a user due to different factors such as different surrounding environments of the television and different loudspeaker characteristics, so that user experience is affected, and negative effects are brought to product brands.
In order to solve the above problems, in the embodiment of the present invention, a microphone is disposed in a television to collect sound emitted by a speaker of the television, a distortion degree is analyzed and calculated in real time, and when the sound distortion degree is found to be greater than or equal to a preset distortion degree threshold value, the problem of sound distortion is solved by dynamically adjusting gains of distortion frequency points, so that user experience is improved.
Various non-limiting embodiments of the present application are described in detail below with reference to the accompanying drawings.
An embodiment of the present application provides a method for controlling sound distortion, as shown in fig. 1, the method includes:
and S1, collecting the audio signal emitted by the loudspeaker.
In this application embodiment, gather through sound collector the audio signal that the speaker sent, for example, gather through sound collectors such as the microphone of taking analog band pass filter the audio signal that the speaker sent, analog band pass filter obtains low frequency signal with high frequency signal filtering, for example obtains the audio signal that frequency range is 20-320 HZ.
Generally speaking, loudspeakers are relatively susceptible to distortion at low frequencies, primarily due to the frequency below the resonant frequency F of the loudspeaker0(in HZ) the speaker efficiency decreases and the speaker operates in a nonlinear frequency band. Loudspeaker resonant frequency F0F of different loudspeakers determined by the characteristics of the loudspeakers themselves0The values are different. Since the frequency range of the audio signal is 20Hz-20KHz, the resonance frequency F of the loudspeaker of a common television is0The range is 50-320HZ, so the audio signal is easy to be distorted in the range of 20-320HZ, and only the low-frequency signal of 20-320HZ needs to be subjected to distortion degree analysis processing. In order to collect and analyze only the distortion degree of the low-frequency sound signal, the audio signal played by the speaker needs to be processed by a sound collector such as a microphone with an analog band-pass filter, for example, the audio signal emitted by the speaker of the television is collected by the sound collector such as the analog band-pass microphone on the television, only the audio signal with the frequency range of 20-320HZ is collected, and the audio signals with other frequencies are filtered.
And S2, performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal.
In the embodiment of the application, in order to avoid the influence caused by external interference, signals of 3-5 seconds can be acquired, and the FFT correspondingly analyzes the acquired signals in the time period. The television main chip carries out FFT operation on the received audio signal, and the time domain signal is converted into a frequency domain signal to obtain frequency spectrum data and frequency spectrum signal amplitude.
In an optional manner of this embodiment of the present application, step S2 includes:
and S21, sampling the audio signal according to a preset sampling frequency to obtain at least one sampling point data.
Step S21 is preceded by: setting a sampling frequency which is more than twice of the highest frequency in the collected audio signals.
Because the frequency range of the collected audio signal is 20-320HZ, according to the sampling theorem, when the sampling frequency is greater than twice of the highest frequency in the input signal, the sampled digital audio signal can completely retain the information in the original analog signal, wherein the input signal is the audio signal (20-320HZ low-frequency signal) emitted by the television loudspeaker collected by a sound collector such as an analog band-pass microphone. Therefore, in the embodiment of the present application, in order to achieve sampling accuracy, the sampling frequency may be set to 48kHz to completely acquire sound information contained in an actual audio signal.
In the embodiment of the application, the audio signal with the frequency range of 20-320HZ is sampled, and the audio signal is converted from an analog signal into a digital signal to obtain a digital audio signal of the audio signal.
And S22, performing fast Fourier transform calculation on the at least one sampling point data to obtain the amplitude of the fundamental wave and each harmonic.
And S23, calculating the distortion degree of the audio signal according to the amplitude of the fundamental wave and each harmonic.
For example, the following steps are carried out: sampling the collected audio information according to a preset sampling frequency (such as 48kHz) to obtain 1024 sampling point data, then performing FFT (fast Fourier transform) calculation of 1024 points, analyzing and processing indexes such as various frequency amplitudes of the input signal in a frequency domain to obtain amplitudes of fundamental waves and various harmonics, obtaining effective values of the fundamental waves and the various harmonics according to the amplitudes of the fundamental waves and the various harmonics, and substituting the effective values into the formula to calculate the distortion degree of the audio signal. The threshold value of the distortion degree is set to be 3%, when the distortion degree of the audio signal emitted by the loudspeaker of the television is detected to be lower than the threshold value, no processing is carried out, and when the distortion degree is larger than or equal to 3%, the gain needs to be adjusted, so that the problem of audio signal distortion is solved.
And S3, judging whether the distortion degree is smaller than a distortion degree threshold value.
In the embodiment of the present application, a distortion threshold (distortion threshold) is set in advance, for example, the threshold of the distortion is set to 3%.
S4, reducing the power of the loudspeaker to a preset power under the condition that the distortion degree is larger than or equal to the distortion degree threshold value, wherein when the power of the loudspeaker is the preset power, the distortion degree of the audio signal emitted by the loudspeaker is smaller than the distortion degree threshold value.
In an optional manner of this embodiment of the present application, step S4 includes:
and S41, reducing the power of the loudspeaker according to a step value when the distortion degree is larger than or equal to the distortion degree threshold value.
In the embodiment of the present application, the step value is a preset power, and the power of the speaker is reduced by the preset power when the distortion degree is greater than or equal to the distortion degree threshold.
And S42, detecting the distortion degree of the audio signal sent by the loudspeaker after the power of the loudspeaker is reduced by the step value.
And S43, judging whether the distortion degree is smaller than the distortion degree threshold value.
And S44, reducing the power of the loudspeaker again according to the step value under the condition that the distortion degree is larger than or equal to the distortion degree threshold value until the power of the loudspeaker is reduced to the preset power.
For example, the following steps are carried out: the television main chip samples the received audio signal through a 12-bit ADC, and the sampling rate is 48kHz (according to the sampling theorem, when the sampling frequency fs is more than 2 times of the highest frequency fmax in the signal, the information in the original signal can be completely reserved by the digital signal after sampling). In order to improve sampling accuracy, a 1024-point FFT is used to realize 10-segment equalizer models, namely 20-40Hz, 40-80Hz, 80-160Hz, 160-320Hz, 320-640Hz, 640-1280Hz, 1280-2560Hz, 2560-5120Hz, 5120-10240Hz and 10240-20480Hz, wherein each band interval frequency difference is an integral multiple of 20Hz, and the frequency band below 320Hz is used for analysis. The threshold value of the distortion degree is 3%, and if the current distortion degree is smaller than the threshold value, no processing is performed. If the Gain is greater than or equal to the threshold value, it can be determined that the output power of the speaker is larger, and then the power of the speaker in the frequency band is reduced to reduce distortion, and the Gain value in the frequency band needs to be reduced according to a certain step value. And testing whether the distortion value meets the requirement in real time every time the Gain value is reduced, and if not, continuously reducing the Gain value until the distortion value meets the requirement.
In an optional manner of the embodiment of the present application, step S4 is followed by: acquiring distortion information of the loudspeaker which is distorted; and uploading the distortion information to a server.
The embodiment of the application can also send the distortion information to the staff, and the staff analyzes the reason of the distortion according to the distortion information and improves the reason, so that the tone quality of the television is continuously improved. The distortion information includes, but is not limited to: device information, setting parameters and playing information.
For example, the following steps are carried out: the sound effect mode of the television is adjusted to be 4K sound effect, and surround sound can be turned on under the 4K sound effect mode. Because of the poor performance of some TV set speakers, the effect of bass part is not shown, so the problem of sound breaking distortion is easy to appear, especially the apparent distortion is shown in "puff" for playing. The sound breaking distortion condition can be detected in real time through the method, the problem of sound distortion is solved by dynamically adjusting the gain of the distortion frequency point, and the distortion information is also fed back to the server. When sound distortion is detected, the system firstly acquires the current machine core-machine type, the size information and sound related parameters set by the current user, such as parameters of a volume value, a pitch value, surround sound, a sound mode and the like, and also sends the name of a currently played film source and a playing path to a background server. The server receives the information and automatically sends the mail to the sound engineer. After the sound engineer receives the mails, the reason of the distortion problem is reproduced and analyzed at the first time, positive feedback is completed, and the tone quality of the television is continuously optimized.
By the control method of the sound distortion, the distortion degree of the sound played by the equipment is reduced, the tone quality of the equipment is improved, and convenience is brought to the use of a user.
An embodiment of the present application provides a device for controlling sound distortion, as shown in fig. 2, the device includes:
the sound collecting and processing module 20 is used for collecting audio signals emitted by the loudspeaker;
the analysis and calculation distortion degree module 22 is configured to perform fast fourier calculation on the audio signal to obtain a distortion degree of the audio signal;
a dynamic gain control module 24, configured to determine whether the distortion degree is smaller than a distortion degree threshold;
and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
In an optional manner of this embodiment of this application, the apparatus further includes:
the audio distortion information feedback module is used for acquiring distortion information of the loudspeaker which is distorted; and uploading the distortion information to a server.
Through the control device of the sound distortion, the distortion degree of the sound played by the equipment is reduced, the tone quality of the equipment is improved, and convenience is brought to the use of a user.
In one embodiment, the present application provides a computer device, which may be a terminal, having an internal structure as shown in fig. 3. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of controlling sound distortion. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the illustration in fig. 3 is merely a block diagram of a portion of the structure associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
An embodiment of the present application provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the following steps when executing the computer program:
collecting audio signals sent by a loudspeaker;
performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal;
judging whether the distortion degree is smaller than a distortion degree threshold value or not;
and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:
collecting audio signals sent by a loudspeaker;
performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal;
judging whether the distortion degree is smaller than a distortion degree threshold value or not;
and under the condition that the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal sent by the loudspeaker is smaller than the distortion degree threshold value.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for controlling sound distortion, the method comprising:
collecting audio signals sent by a loudspeaker; wherein, gather the audio signal that the speaker sent and include: collecting audio signals emitted by a loudspeaker through a sound collector with an analog band-pass filter;
performing fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal;
judging whether the distortion degree is smaller than a distortion degree threshold value or not;
when the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to a preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal emitted by the loudspeaker is smaller than the distortion degree threshold value;
wherein, when the distortion degree is greater than or equal to the distortion degree threshold, reducing the power of the loudspeaker to a preset power includes:
reducing the power of the loudspeaker by a step value if the distortion level is greater than or equal to the distortion level threshold;
detecting the distortion degree of the audio signal sent by the loudspeaker after the power of the loudspeaker is reduced by the stepping value;
judging whether the distortion degree is smaller than the distortion degree threshold value or not;
and when the distortion degree is larger than or equal to the distortion degree threshold value, reducing the power of the loudspeaker again according to the stepping value until the power of the loudspeaker is reduced to the preset power.
2. The method of claim 1, wherein the performing fast fourier transform on the audio signal to obtain the distortion factor of the audio signal comprises:
sampling the audio signal according to a preset sampling frequency to obtain at least one sampling point data;
performing fast Fourier transform calculation on the at least one sampling point data to obtain the amplitude of the fundamental wave and each harmonic;
and calculating the distortion degree of the audio signal according to the amplitude of the fundamental wave and each harmonic.
3. The method of claim 1, wherein the capturing audio signals emitted by a speaker comprises:
and collecting audio signals emitted by the loudspeaker through a sound collector.
4. The method of claim 1, wherein the reducing the power of the speaker to a preset power if the distortion degree is greater than or equal to the distortion degree threshold comprises:
acquiring distortion information of the loudspeaker which is distorted;
and uploading the distortion information to a server.
5. The method of claim 2, wherein the sampling the audio signal at the predetermined sampling frequency to obtain at least one sampling point data comprises:
setting a sampling frequency, wherein the sampling frequency is more than twice of the highest frequency in the audio signals.
6. An apparatus for controlling sound distortion, the apparatus comprising:
the sound acquisition processing module is used for acquiring audio signals emitted by the loudspeaker; wherein, gather the audio signal that the speaker sent and include: collecting audio signals emitted by a loudspeaker through a sound collector with an analog band-pass filter;
the analysis and calculation distortion degree module is used for carrying out fast Fourier calculation on the audio signal to obtain the distortion degree of the audio signal;
the dynamic gain control module is used for judging whether the distortion degree is smaller than a distortion degree threshold value or not; when the distortion degree is greater than or equal to the distortion degree threshold value, reducing the power of the loudspeaker to a preset power, wherein when the power of the loudspeaker is the preset power, the distortion degree of an audio signal emitted by the loudspeaker is smaller than the distortion degree threshold value; wherein, when the distortion degree is greater than or equal to the distortion degree threshold, reducing the power of the loudspeaker to a preset power includes:
reducing the power of the loudspeaker by a step value if the distortion level is greater than or equal to the distortion level threshold;
detecting the distortion degree of the audio signal sent by the loudspeaker after the power of the loudspeaker is reduced by the stepping value;
judging whether the distortion degree is smaller than the distortion degree threshold value or not;
and when the distortion degree is larger than or equal to the distortion degree threshold value, reducing the power of the loudspeaker again according to the stepping value until the power of the loudspeaker is reduced to the preset power.
7. The apparatus of claim 6, wherein the apparatus comprises:
the audio distortion information feedback module is used for acquiring distortion information of the loudspeaker which is distorted; and uploading the distortion information to a server.
8. A television comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 5 when executing the computer program.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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| CN110121133A (en) * | 2018-02-04 | 2019-08-13 | 豪威科技股份有限公司 | By monitoring loudspeaker distortions come dynamic calibration output level to minimize distortion |
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