CN111010642B - Earphone and uplink noise reduction method thereof - Google Patents
Earphone and uplink noise reduction method thereof Download PDFInfo
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- CN111010642B CN111010642B CN201911358377.3A CN201911358377A CN111010642B CN 111010642 B CN111010642 B CN 111010642B CN 201911358377 A CN201911358377 A CN 201911358377A CN 111010642 B CN111010642 B CN 111010642B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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Abstract
The invention discloses an uplink noise reduction method of an earphone, which can perform uplink noise reduction processing according to a sound signal collected by a first sound collection device arranged in an ear handle and a sound signal collected by a second sound collection device arranged in a front cavity when the current environment of the earphone is a strong noise environment. On the one hand, because second sound collection system sets up in the front chamber of earphone, can not receive external strong wind or strong sound's interference basically, can directly receive user's speech signal again simultaneously through the duct is inside, improved the signal-to-noise ratio and the noise reduction effect of signal. On the other hand, the first sound collection device is arranged in the ear handle, and the voice signal obtained after noise reduction treatment is carried out based on the combination of the first sound collection device and the second sound collection device is clearer and cannot be stuffy. The invention also discloses an earphone which has the same beneficial effects as the method.
Description
Technical Field
The invention relates to the technical field of earphone noise reduction, in particular to an earphone and an uplink noise reduction method thereof.
Background
With the development of the earphone technology, the requirement of the user on the conversation effect of the earphone is higher and higher. In the prior art, a plurality of earphones adopt an uplink noise reduction scheme with double MICs, and the effect of eliminating ambient noise is realized through the main MIC arranged in the ear handle and the sound signals collected by the auxiliary MIC, so that a clear conversation effect is achieved. This kind of go upward and fall the scheme of making an uproar and can satisfy the conversation demand under the normal noise environment, but under strong noise environment, main MIC all receives external strong wind or the serious interference of strong sound (be greater than user's sound of speaking even) with assisting the MIC, and the noise reduction effect worsens, has seriously influenced user's conversation effect, has reduced user experience.
Disclosure of Invention
The invention aims to provide an earphone and an uplink noise reduction method thereof, which improve the signal-to-noise ratio and the noise reduction effect of signals, and voice signals are natural and do not seem to be stuffy.
In order to solve the above technical problem, the present invention provides an uplink noise reduction method for an earphone, where the earphone includes a first sound collection device disposed in an ear stem and a second sound collection device disposed in a front cavity, and the method includes:
judging whether the current environment where the earphone is located is a strong noise environment;
and if so, carrying out uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device.
Preferably, the uplink noise reduction processing is performed according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device, and includes:
comparing the sound signal collected by the first sound collection device with the sound signal collected by the second sound collection device;
and eliminating redundant sound signals of the sound signals collected by the first sound collection device in the middle and low frequency section compared with the sound signals collected by the second sound collection device, and reserving high-frequency signals and residual middle and low frequency signals in the sound signals collected by the first sound collection device.
Preferably, the earphone further comprises a third sound collection device arranged in the ear handle, and the distances from the third sound collection device to one end, far away from the front cavity, of the ear handle are different from the distances from the first sound collection device to the end, far away from the front cavity, of the ear handle;
after the uplink noise reduction processing is performed according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device, the method further includes:
judging whether the current environment of the earphone is changed into a normal noise environment or not;
if yes, switching to uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device.
Preferably, the earphone further comprises a third sound collection device arranged in the ear handle, and the distances from the third sound collection device to one end, far away from the front cavity, of the ear handle are different from the distances from the first sound collection device to the end, far away from the front cavity, of the ear handle;
the method further comprises the following steps:
and if the current environment is a normal noise environment, performing uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device.
Preferably, after performing uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the third sound collection device, the method further includes:
Judging whether the current environment of the earphone is changed into a strong noise environment;
and if so, switching to uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device.
Preferably, the earphone further comprises a third sound collection device arranged in the ear handle, and the distances from the third sound collection device and the first sound collection device to one end of the ear handle far away from the front cavity are different;
according to the sound signal that first sound collection system gathered and the sound signal that second sound collection system gathered carry out ascending noise reduction, include:
selecting sound signals collected by two sound collection devices from the sound signals collected by the first sound collection device, the sound signals collected by the second sound collection device and the sound signals collected by the third sound collection device;
carrying out uplink noise reduction processing according to the selected sound signals collected by the two sound collection devices to obtain primary noise reduction sound signals;
and carrying out uplink noise reduction processing according to the primary noise reduction sound signal and the sound signals collected by the rest sound collection devices.
Preferably, the determining whether the current environment where the headset is located is a strong noise environment includes:
acquiring sound signals collected by the first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the average amplitude of the sound signals in the preset time period;
judging whether the average amplitude is larger than an amplitude threshold value or not, and if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
Preferably, the determining whether the current environment where the headset is located is a strong noise environment includes:
acquiring sound signals collected by the first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the energy of the sound signal in the preset time period;
judging whether the energy is greater than an energy threshold value, if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
Preferably, the determining whether the current environment where the headset is located is a strong noise environment includes:
acquiring sound signals collected by the first sound collection device within a preset time period in the current environment where the earphone is located;
Calculating the conformity of the frequency spectrum of the sound signal in the preset time period and the frequency spectrum of a preset strong noise signal;
judging whether the conformity is greater than a conformity threshold value, if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
In order to solve the above technical problem, the present invention further provides an earphone, including a first sound collection device disposed in the ear handle and a second sound collection device disposed in the front cavity, further including:
a processor executing a computer program to implement the steps of the method for uplink noise reduction for headphones as described above.
Preferably, the first sound collection device is a first MIC, and the second sound collection device is a second MIC or an acceleration sensor.
The invention provides an uplink noise reduction method of an earphone, which is characterized in that whether the current environment of the earphone is a strong noise environment or not is judged before the earphone is subjected to uplink noise reduction, and when the current environment of the earphone is the strong noise environment, uplink noise reduction processing is carried out according to a sound signal collected by a first sound collection device arranged in an ear handle and a sound signal collected by a second sound collection device arranged in a front cavity. On the one hand, because the second sound collection system sets up in the front chamber of earphone, can not receive external strong wind or the interference of strong sound basically, can directly receive user's speech signal through the duct is inside again simultaneously, improved the signal-to-noise ratio and the noise reduction effect of signal. On the other hand, the first sound collection device is arranged in the ear handle, and a voice signal obtained after noise reduction treatment is carried out on the basis of combination of the first sound collection device and the second sound collection device is natural and does not seem to be tedious.
The invention also provides an earphone which has the same beneficial effects as the method.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a position of a sound collection device in an earphone according to the present invention;
FIG. 2 is a process flow chart of an uplink noise reduction method for a headset according to the present invention
Fig. 3 is a schematic diagram of the position of a sound collection device in another earphone provided by the present invention;
fig. 4 is a schematic structural diagram of an uplink noise reduction system of a headphone according to the present invention;
fig. 5 is a schematic structural diagram of an earphone provided by the present invention.
Detailed Description
The core of the invention is to provide the earphone and the uplink noise reduction method thereof, which improve the signal-to-noise ratio and the noise reduction effect of signals, and the voice signals are natural and do not appear to be stuffy.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present 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.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram illustrating a position of a sound collection device in an earphone according to the present invention; fig. 2 is a process flow chart of an uplink noise reduction method for a headset according to the present invention.
The earphone comprises a first sound collection device arranged in the ear handle and a second sound collection device arranged in the front cavity, and the method comprises the following steps:
s11: judging whether the current environment of the earphone is a strong noise environment or not, if so, entering S12;
s12: and carrying out uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device.
Firstly, the earphone is divided into an ear handle and a receiver in the application, wherein a cavity in the receiver is called a front cavity; when the headset is worn, the ear stem is typically outside the ear and the earpiece is typically inside the ear. Different is all set up the sound collection system in the ear-handle among the prior art, in this application, set up first sound collection system in the ear-handle, second sound collection system sets up in the front chamber. Because second sound collection system sets up in the front chamber, can not receive external strong wind or the interference of strong sound basically, simultaneously, it can directly be through the inside speech signal who receives the user of duct again, still considers that second sound collection system mainly is well low frequency signal through the inside speech signal who receives of duct, in order to guarantee speech signal's nature, it is not vexed, still sets up first sound collection system in the earstem in this application to guarantee to gather full user speech signal.
On this basis, when the up-link noise reduction processing is performed on the earphone, it is determined whether the current environment where the earphone is located is a strong noise environment, where the strong noise environment includes a strong sound environment (e.g., on a noisy vehicle), a strong wind environment, and the like. In consideration of the difference between the strong noise environment and the normal noise environment in terms of sound amplitude, energy, frequency spectrum and the like, when the strong noise environment is determined, the environment can be judged to be the normal noise environment or the strong noise environment according to the factors such as the sound amplitude, the energy, the frequency spectrum and the like.
And when the current environment is determined to be a strong noise environment, performing uplink noise reduction processing according to the sound signal acquired by the first sound acquisition device and the sound signal acquired by the second sound acquisition device. When the uplink noise reduction processing is performed, an uplink noise reduction scheme may be designed based on the difference between the sound signals collected by the two sound collection devices. Specifically, considering that strong noise (e.g., strong sound and strong wind sound) is usually a medium-low frequency signal, and a user voice signal collected by the second sound collection device is also usually a medium-low frequency signal, and the voice signal collected by the first sound collection device includes the user voice signal and also a medium-low frequency strong noise, the voice signal collected by the first sound collection device and the voice signal collected by the second sound collection device can be compared, and redundant strong noise of the voice signal collected by the first sound collection device in the medium-low frequency band is filtered out, so that uplink noise reduction of the earphone is realized, and a pure user voice signal is obtained.
To sum up, adopt the scheme of this application, on the one hand, because the second sound collection system sets up in the front chamber of earphone, can not receive external strong wind or the interference of strong sound basically, can directly receive user's speech signal through the duct is inside again simultaneously, improved the signal-to-noise ratio and the noise reduction effect of signal. On the other hand, the first sound collection device is arranged in the ear handle, and a voice signal obtained after noise reduction treatment is carried out on the basis of combination of the first sound collection device and the second sound collection device is natural and does not seem to be tedious. In addition, under the condition of achieving the same noise reduction effect by the mode, compared with the existing scheme of adopting three or more sound acquisition devices, the consumption of the whole system resources (such as the consumption of a memory) is much less, and the system resources are saved.
On the basis of the above-described embodiment:
as a preferred embodiment, the performing of the uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device includes:
comparing the sound signal collected by the first sound collection device with the sound signal collected by the second sound collection device;
And eliminating redundant sound signals of the sound signals collected by the first sound collection device in the middle and low frequency section compared with the sound signals collected by the second sound collection device, and reserving high-frequency signals and residual middle and low frequency signals in the sound signals collected by the first sound collection device.
Specifically, it is considered that the strong noise is usually concentrated in the middle and low frequencies, the sound signal collected by the first sound collection device includes the user's voice signal (including the middle and low frequency voice signal and the high frequency voice signal) and also includes the middle and low frequency strong noise signal, and the sound signal collected by the second sound collection device is the middle and low frequency voice signal.
Based on this, in the embodiment, the sound signal collected by the first sound collection device is compared with the sound signal collected by the second sound collection device, and essentially, the middle-low frequency band of the sound signal collected by the first sound collection device is compared with the sound signal collected by the second sound collection device (mainly concentrated on the middle-low frequency band), the sound signals collected by the first sound collection device are filtered out in a way that the sound signals are redundant in the middle-low frequency band compared with the sound signals collected by the second sound collection device, and only the signals and high-frequency signals which are the same as the sound signals collected by the second sound collection device in the middle-low frequency band in the sound signals collected by the first sound collection device are left (the reserved voice signals can be equivalently understood as the high-frequency band of the sound signals collected by the first sound collection device + the middle-low frequency band of the sound signals collected by the second sound collection device in the frequency band). Therefore, the method can effectively reduce the noise of the earphone, improve the signal-to-noise ratio and the noise reduction effect of the signal and ensure the normal conversation effect.
In addition, it is considered that although the second sound collection device is located in the front cavity, a weak strong noise may also be collected, but the amplitude of the collected strong noise is very small, and therefore, in this embodiment, before comparing the sound signal collected by the first sound collection device with the sound signal collected by the second sound collection device, the sound signal with a smaller amplitude (by reasonably setting an amplitude threshold) in the sound signal collected by the second sound collection device may be filtered, so that the purity of the sound signal collected by the second sound collection device (essentially, the speech signal of the user) is ensured.
Certainly, in practical applications, echo cancellation processing, speech enhancement signal processing, and the like may be continuously performed on the retained speech signal, which is not described herein again. Of course, the uplink noise reduction processing here can also be realized by performing beamforming processing on the sound signal, and the present application is not particularly limited herein.
As a preferred embodiment, the earphone further comprises a third sound collection device arranged in the ear stem, and the distances from the third sound collection device and the first sound collection device to one end of the ear stem far away from the front cavity are different;
After carrying out uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device, the method further comprises the following steps:
judging whether the current environment of the earphone is changed into a normal noise environment;
if yes, switching to uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device.
Specifically, in practical applications, the environment where the headset is located may be changed, which may be caused by the fact that the noise of the environment where the headset is located changes due to the fact that the position where the headset is located does not change; it may also be that the user wears the headset and moves, causing a change in the noise of the environment in which the headset is located. Considering that the sound signal collected by the second sound collection device is usually a low-medium frequency signal, the resulting sound signal may be tedious compared to the full frequency sound signal collected by the third sound collection device.
Based on this, the switching mechanism is set up in this application, and it can carry out self-adaptation switching to which sound collection system carries out the ascending noise reduction based on according to the change of the present environment that the earphone is located.
Specifically, referring to fig. 3, fig. 3 is a schematic diagram of a position of a sound collection device in another earphone provided by the present invention. The first sound collection device and the third sound collection device are both arranged in the ear handle, when the earphone is worn, the bottom end of the ear handle (namely, the end of the ear handle far away from the front cavity) usually faces the mouth of a user, and the distance between the first sound collection device and the bottom end of the ear handle is different from the distance between the third sound collection device and the bottom end of the ear handle. In practical applications, the direction of the connection line between the first sound collection device and the third sound collection device is parallel to the central axis direction of the ear stem (the ear stem is generally cylindrical).
If the current environment where the earphone is located is a strong noise environment, uplink noise reduction processing is carried out according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device, so that the signal-to-noise ratio and the noise reduction effect of the signals are improved. If the current environment that the earphone was located has changed later, also the current environment has become normal noise environment for by strong noise environment, then switch over to carry out the processing of making an uproar that falls according to the sound signal of first sound collection system collection and the sound signal that third sound collection system gathered, because first sound collection system and third sound collection system all set up in the ear handle, on the basis of satisfying the conversation demand, still guaranteed the nature of pronunciation. Of course, if the current environment of the earphone is not changed later, that is, the current environment of the earphone is still a strong noise environment, the uplink noise reduction processing is still performed according to the sound signal acquired by the first sound acquisition device and the sound signal acquired by the second sound acquisition device.
Therefore, the embodiment introduces a mechanism for performing adaptive switching according to the current environment where the earphone is located, and ensures the naturalness of the voice sound in the normal noise environment while ensuring the improvement of the signal-to-noise ratio and the noise reduction effect of the signal in the strong noise environment.
As a preferred embodiment, the earphone further comprises a third sound collection device arranged in the ear stem, and the distances from the third sound collection device and the first sound collection device to one end of the ear stem far away from the front cavity are different;
the method further comprises the following steps:
and if the current environment is a normal noise environment, performing uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device.
Referring to fig. 3 of the drawings,
the sound signal that the second sound collection system gathered is considered to this embodiment is medium and low frequency signal usually, compare with the full frequency sound signal that third sound collection system gathered, the speech signal that probably causes final acquisition has some vexations, consequently, when judging the current environment that the earphone was located and being normal noise environment, still go upward according to the sound signal that first sound collection system gathered and the sound signal that third sound collection system gathered and fall the noise processing, because first sound collection system and third sound collection system all set up in the earstem, on the basis that satisfies the conversation demand, the nature of the sound of pronunciation has still been guaranteed.
When the sound signal that adopts first sound collection system collection and the sound signal that the third sound collection system collection go upward to fall the noise processing, use the bottom that first sound collection system is close to the ear handle, the bottom that the ear handle was kept away from to the second sound collection system is for the example to make the introduction: considering that the distances from the first sound collection device and the third sound collection device to the mouth of the user are different, the received voice signals have different amplitudes, and specifically, the amplitude of the voice signal collected by the first sound collection device is larger than that of the voice signal collected by the third sound collection device; in addition, the voice signal that first sound collection system gathered and the voice signal that third sound collection system gathered can delay, and it has the phase difference to embody that there is between the voice signal that first sound collection system gathered and the voice signal that third sound collection system gathered. In addition, the time difference between the strong noise or the strong wind sound reaching the first sound collection device and the third sound collection device is almost negligible, so that the strong noise and the strong wind sound collected by the first sound collection device and the strong noise and the strong wind sound collected by the third sound collection device can be considered to be the same.
Based on the above, the uplink noise reduction processing may be performed on the sound signals collected by the first sound collection device and the third sound collection device based on the amplitude and/or the phase. Specifically, the phase and/or amplitude of the sound signal collected by the first sound collection device is compared with the phase and/or amplitude of the sound signal collected by the third sound collection device; and eliminating the sound signals of which the phase difference (referring to an absolute value) between the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device is smaller than a phase difference threshold value and/or the amplitude difference (referring to the absolute value) is smaller than an amplitude difference threshold value, and reserving the sound signals of which the phase difference is not smaller than the phase difference threshold value and/or the amplitude difference is not smaller than the amplitude difference threshold value. Therefore, a relatively pure voice signal can be obtained by the method.
As a preferred embodiment, after performing the uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the third sound collection device, the method further includes:
judging whether the current environment where the earphone is located is a strong noise environment;
if yes, switching to the uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device.
The same mechanism as that introduced in the above embodiment for performing adaptive switching according to the current environment where the headset is located. If the current environment that the earphone was located before is normal noise environment, then go upward according to the sound signal of first sound collection system collection and the sound signal of third sound collection system collection and fall the noise processing, because first sound collection system and third sound collection system all set up in the ear-handle, on the basis of satisfying the conversation demand, still guaranteed the nature of pronunciation. If the current environment of the earphone is changed later, namely the current environment is changed from a normal noise environment to a strong noise environment, the current environment is switched to be an uplink noise reduction treatment according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device, so that the signal-to-noise ratio of the signals and the noise reduction effect are improved. Of course, if the current environment of the earphone is not changed later, that is, the current environment is still a normal noise environment, the uplink noise reduction processing is still performed according to the sound signal acquired by the first sound acquisition device and the sound signal acquired by the third sound acquisition device.
Therefore, the embodiment introduces a mechanism for performing adaptive switching according to the current environment where the earphone is located, and ensures the improvement of the signal-to-noise ratio and the noise reduction effect of the signal in the strong noise environment while ensuring the naturalness of the voice sound in the normal noise environment.
As a preferred embodiment, the earphone further comprises a third sound collection device arranged in the ear stem, and the distances from the third sound collection device and the first sound collection device to one end of the ear stem far away from the front cavity are different;
according to the sound signal that first sound collection system gathered and the sound signal that second sound collection system gathered and carry out ascending noise reduction, include:
selecting sound signals collected by two sound collection devices from sound signals collected by a first sound collection device, sound signals collected by a second sound collection device and sound signals collected by a third sound collection device;
carrying out uplink noise reduction processing according to the sound signals collected by the two selected sound collection devices to obtain primary noise reduction sound signals;
and carrying out uplink noise reduction processing according to the primary noise reduction sound signal and the sound signals collected by the rest sound collection devices.
Specifically, when the resources of the headphone system are sufficient, in order to further improve the noise reduction effect, a third sound collection device may be further disposed in the ear stem. When the current environment is a strong noise environment, the uplink noise reduction processing may be performed based on the sound signal collected by the first sound collection device, the sound signal collected by the second sound collection device, and the sound signal collected by the second sound collection device. In practical application, two sound signals can be selected from the three sound signals to be subjected to uplink noise reduction firstly, and then uplink noise reduction is performed again by combining the remaining sound signals.
When performing uplink noise reduction processing, if the processed sound signal includes a sound signal acquired by the second sound acquisition device (another sound signal may be a sound signal acquired by the first sound acquisition device, or may also be a sound signal acquired by the third sound acquisition device, or may also be a primary noise reduction sound signal obtained by performing uplink noise reduction processing on the sound signal acquired by the first sound acquisition device and the sound signal acquired by the third sound acquisition device), the noise reduction may be performed by using the sound signal acquired by the first sound acquisition device and the sound signal acquired by the second sound acquisition device in the above-mentioned embodiment to perform uplink noise reduction; if the processed sound signals are the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device, the uplink noise reduction may be performed by using the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device in the above embodiments, which is not described herein again.
In addition, the sound signal collected by the third sound collection device may also be matched with the sound signal collected by the first sound collection device to implement uplink noise reduction processing when the current environment is a normal noise environment.
As a preferred embodiment, the determining whether the current environment in which the headset is located is a strong noise environment includes:
acquiring sound signals collected by a first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the average amplitude of the sound signals in a preset time period;
judging whether the average amplitude is larger than an amplitude threshold value or not, and if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
Specifically, considering that the amplitude of the sound signal collected by the first sound collection device in the strong noise environment is obviously greater than the amplitude of the sound signal collected by the first sound collection device in the normal noise environment, in this embodiment, in order to distinguish the normal noise environment from the strong noise environment, the average amplitude of the sound signal collected by the first sound collection device in the current environment where the earphone is located within the preset time period is compared with the preset amplitude threshold, and if the average amplitude is greater than the amplitude threshold, the current environment is the strong noise environment; otherwise, the current environment is the normal noise environment. The embodiment distinguishes the normal noise environment from the strong noise environment through the amplitude of the sound signal, and has high precision; in addition, in order to further improve the judgment precision, the average amplitude of the sound signal in the preset time period is compared with the amplitude threshold, so that the interference of some abnormal signals is effectively reduced, the anti-interference performance is strong, and the noise of the environment can be reflected better. Further, the amplitude threshold here may be, but is not limited to, 35 dB.
It should be noted that, in the present application, if a third sound collection device disposed in the ear stem is further included in the earphone, the noise environment can also be distinguished by the sound signal collected by the third sound collection device, and the present application is not limited herein.
As a preferred embodiment, the determining whether the current environment in which the headset is located is a strong noise environment includes:
acquiring sound signals collected by a first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the energy of the sound signal in a preset time period;
judging whether the energy is greater than an energy threshold value, if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
Specifically, considering that the energy of the sound signal collected by the first sound collection device in the strong noise environment is significantly greater than the energy of the sound signal collected by the first sound collection device in the normal noise environment, in this embodiment, in order to distinguish the normal noise environment from the strong noise environment, the energy of the sound signal collected by the first sound collection device in the current environment in which the earphone is located within the preset time period is compared with the preset energy threshold, and if the energy is greater than the energy threshold, the current environment is the strong noise environment; otherwise, the current environment is the normal noise environment. The embodiment distinguishes the normal noise environment from the strong noise environment through the energy of the sound signal, and has high precision; in addition, in order to further improve the judgment precision, the energy of the sound signal in the preset time period is compared with the energy threshold, so that the interference of some abnormal signals is effectively reduced, the anti-interference performance is stronger, and the noise of the environment can be reflected better.
As a preferred embodiment, the determining whether the current environment in which the headset is located is a strong noise environment includes:
acquiring sound signals collected by a first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the conformity of the frequency spectrum of the sound signal in the preset time period and the frequency spectrum of the preset strong noise signal;
judging whether the conformity is greater than a conformity threshold value, if so, judging that the current environment is a strong noise environment; otherwise, judging that the current environment is a normal noise environment.
Specifically, in consideration that the frequency spectrum of the sound signal collected by the first sound collection device in the strong noise environment is obviously different from the frequency spectrum of the sound signal collected by the first sound collection device in the normal noise environment, in this embodiment, in order to distinguish the normal noise environment from the strong noise environment, the frequency spectrum of the sound signal collected by the first sound collection device in the current environment where the earphone is located in the preset time period is compared with the frequency spectrum of the preset strong noise signal to obtain a conformity degree, and if the conformity degree is greater than the conformity degree threshold, the current environment is the strong noise environment; otherwise, the current environment is the normal noise environment. The embodiment distinguishes the normal noise environment and the strong noise environment through the frequency spectrum of the sound signal, and has high precision; in addition, in order to further improve the judgment precision, the frequency spectrum of the sound signal in the preset time period is compared with the frequency spectrum of the preset strong noise signal, so that the interference of some abnormal signals is effectively reduced, the anti-interference performance is stronger, and the noise of the environment can be reflected better.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an uplink noise reduction system of an earphone according to the present invention.
The earphone is including setting up the first sound collection system in the ear handle and setting up the second sound collection system in the intracavity before, and this system includes:
a judging module 41, configured to judge whether a current environment where the earphone is located is a strong noise environment, and if yes, trigger the uplink noise reduction module 42;
and the uplink noise reduction module 42 is configured to perform uplink noise reduction processing according to the sound signal acquired by the first sound acquisition device and the sound signal acquired by the second sound acquisition device.
For the introduction of the uplink noise reduction system of the earphone provided by the present invention, please refer to the above method embodiment, and the present invention is not described herein again.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an earphone provided by the present invention, the earphone includes a first sound collecting device 51 disposed in an ear stem and a second sound collecting device 52 disposed in a front cavity, and further includes:
the processor 53 executes a computer program to implement the steps of the up-link noise reduction method for headphones as described above.
In practical applications, if the MIC is already set in the front cavity of the earphone, the second sound collection device 52 herein can use the existing MIC in the earphone to realize MIC multiplexing, thereby reducing the occupation of the earphone space and the cost.
As a preferred embodiment, the first sound collection device 51 is a first MIC, and the second sound collection device 52 is a second MIC or an acceleration sensor (e.g., a bone conduction sensor).
As a preferred embodiment, the earphone further comprises a third sound collection device 54 disposed in the ear stem, and the third sound collection device 54 and the first sound collection device 51 are located at different distances from the end of the ear stem away from the front cavity.
Here, the third sound collection device 54 may be a third MIC.
The first MIC and the third MIC may be, but are not limited to, ANC (Active Noise Cancellation) MICs.
For the introduction of the earphone provided by the present invention, please refer to the above method embodiment, which is not described herein again.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An uplink noise reduction method of an earphone is characterized in that the earphone comprises a processor, a first sound acquisition device arranged in an ear handle and a second sound acquisition device arranged in a front cavity, and the uplink noise reduction method of the earphone is applied to the processor and comprises the following steps:
judging whether the current environment where the earphone is located is a strong noise environment;
if yes, performing uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device;
the earphone also comprises a third sound acquisition device arranged in the ear handle, and the distances from the third sound acquisition device to one end of the ear handle far away from the front cavity are different from those from the first sound acquisition device to the end of the ear handle far away from the front cavity;
After the uplink noise reduction processing is performed according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device, the method further includes:
judging whether the current environment of the earphone is changed into a normal noise environment or not;
if yes, switching to uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the third sound collection device.
2. The uplink noise reduction method for the earphone according to claim 1, wherein the uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device comprises:
comparing the sound signal collected by the first sound collection device with the sound signal collected by the second sound collection device;
and eliminating redundant sound signals of the sound signals collected by the first sound collection device in the middle and low frequency section compared with the sound signals collected by the second sound collection device, and reserving high-frequency signals and residual middle and low frequency signals in the sound signals collected by the first sound collection device.
3. The method for uplink noise reduction for headphones as recited in claim 1, further comprising:
And when judging whether the current environment of the earphone is a strong noise environment, if the current environment is a normal noise environment, performing uplink noise reduction processing according to the sound signals acquired by the first sound acquisition device and the sound signals acquired by the third sound acquisition device.
4. The uplink noise reduction method for headphones according to claim 3, wherein after performing uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the third sound collection device, the method further comprises:
judging whether the current environment of the earphone is changed into a strong noise environment;
if yes, switching to uplink noise reduction processing according to the sound signals collected by the first sound collection device and the sound signals collected by the second sound collection device.
5. The uplink noise reduction method for the earphone according to claim 1, wherein the uplink noise reduction processing according to the sound signal collected by the first sound collection device and the sound signal collected by the second sound collection device comprises:
selecting sound signals collected by two sound collection devices from the sound signals collected by the first sound collection device, the sound signals collected by the second sound collection device and the sound signals collected by the third sound collection device;
Carrying out uplink noise reduction processing according to the sound signals collected by the two selected sound collection devices to obtain primary noise reduction sound signals;
and carrying out uplink noise reduction processing according to the primary noise reduction sound signal and the sound signals collected by the rest sound collection devices.
6. The method for reducing noise of an earphone according to any one of claims 1 to 5, wherein the step of judging whether the current environment of the earphone is a strong noise environment comprises the steps of:
acquiring sound signals acquired by the first sound acquisition device within a preset time period in the current environment where the earphone is located;
calculating the average amplitude of the sound signals in the preset time period;
judging whether the average amplitude is larger than an amplitude threshold value or not, and if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
7. The uplink noise reduction method for the earphone according to any one of claims 1 to 5, wherein the determining whether the current environment where the earphone is located is a strong noise environment comprises:
acquiring sound signals collected by the first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the energy of the sound signal in the preset time period;
Judging whether the energy is larger than an energy threshold value, if so, judging that the current environment is a strong noise environment; otherwise, judging that the current environment is a normal noise environment.
8. The method for reducing noise of an earphone according to any one of claims 1 to 5, wherein the step of judging whether the current environment of the earphone is a strong noise environment comprises the steps of:
acquiring sound signals collected by the first sound collection device within a preset time period in the current environment where the earphone is located;
calculating the conformity of the frequency spectrum of the sound signal in the preset time period and the frequency spectrum of a preset strong noise signal;
judging whether the conformity is greater than a conformity threshold value, if so, judging that the current environment is a strong noise environment; otherwise, judging the current environment as a normal noise environment.
9. The utility model provides an earphone, its characterized in that, including set up first sound collection system in the ear handle, set up the second sound collection system in the front chamber and set up in third sound collection system in the ear handle, third sound collection system with first sound collection system extremely the ear handle is kept away from the distance of the one end in front chamber is different, still includes:
a processor executing a computer program to carry out the steps of the method of uplink noise reduction for a headset according to any of claims 1 to 8.
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| CN111800712B (en) * | 2020-06-30 | 2022-05-31 | 联想(北京)有限公司 | Audio processing method and electronic equipment |
| CN114071309B (en) * | 2021-12-20 | 2023-08-25 | 歌尔科技有限公司 | Earphone noise reduction method, device, equipment and computer readable storage medium |
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