CN112911441A - Noise reduction method, apparatus, audio device, and computer-readable storage medium - Google Patents
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Abstract
The application relates to the field of audio processing, and provides a noise reduction method and device, audio equipment and a computer-readable storage medium. The noise reduction method comprises the following steps: when the earphone is in the active noise reduction mode, if the fact that the user is in a call is detected, the earphone is controlled to exit the active noise reduction mode; acquiring sound energy and environmental noise energy of a user in a call process; and if the environment noise reduction starting condition is determined to be met according to the sound energy and the environment noise energy, controlling the earphone to start the environment noise reduction mode. By adopting the method, the active noise reduction function can be automatically closed during conversation, and the environment noise reduction is carried out in a self-adaptive manner, so that the conversation quality is improved.
Description
Technical Field
The present application relates to the field of audio processing technologies, and in particular, to a noise reduction method and apparatus, an audio device, and a computer-readable storage medium.
Background
At present, in order to meet the immersive experience of a user, a Noise reduction function, such as an Active Noise Cancellation (ANC) function, is added to many audio devices, such as earphones, so that the interference of external Noise is reduced when the user uses the audio devices.
However, when pursuing immersive experience, if the user uses the earphone to make a call, and the earphone does not automatically remove the active noise reduction function, the user does not have background noise as a reference during the call, the size of the sound cannot be well controlled, surrounding people may be affected by excessive sound, and the opposite party may feel very obtrusive, which causes discomfort to the opposite party. In addition, due to the existence of environmental noise, the communication sound may be interfered, and the opposite party of the communication cannot receive a high-quality voice signal, thereby reducing the communication quality.
Disclosure of Invention
In view of the foregoing, there is a need to provide a noise reduction method, apparatus, audio device and computer readable storage medium capable of automatically turning off an active noise reduction function during a call and adaptively performing ambient noise reduction, thereby improving call quality.
The embodiment of the application provides a noise reduction method, which is applied to an earphone and comprises the following steps:
when the earphone is in an active noise reduction mode, if the fact that a user is in a call is detected, the earphone is controlled to exit the active noise reduction mode;
acquiring the sound energy and the environmental noise energy of the user in the communication process;
and if the starting environment noise reduction condition is determined to be met according to the sound energy and the environment noise energy, controlling the earphone to start an environment noise reduction mode.
In one embodiment, the process of detecting that the user is talking includes:
determining that the user is a target user;
and if the volume of the target user in the call process is higher than a preset volume threshold, judging that the user is in call.
In one embodiment, the process of determining that the user is a target user includes:
identifying the voiceprint characteristics of the user in the call process;
matching the voiceprint features with a preset reference voiceprint corresponding to the target user;
and if the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
In one embodiment, the process of determining that the start-up ambient noise reduction condition is satisfied based on the sound energy and the ambient noise energy includes:
and if the ratio of the sound energy of the user to the environment noise energy is greater than a preset signal-to-noise ratio threshold, determining that the starting environment noise reduction condition is met.
The embodiment of the application provides a noise reduction device, is applied to the earphone, the device includes:
the first control module is used for controlling the earphone to exit from the active noise reduction mode when detecting that a user is in a call when the earphone is in the active noise reduction mode;
the acquisition module is used for acquiring the sound energy and the environmental noise energy of the user in the conversation process;
and the second control module is used for controlling the earphone to start the environmental noise reduction mode when determining that the starting environmental noise reduction condition is met according to the sound energy and the environmental noise energy.
An embodiment of the present application provides an audio device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the noise reduction method provided in any embodiment of the present application when executing the computer program.
The embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the noise reduction method provided in any embodiment of the present application.
According to the noise reduction method and device, the audio device and the computer readable storage medium, when the fact that a user is using an earphone to talk is detected, the earphone is controlled to exit an active noise reduction mode, namely, an active noise reduction function is automatically turned off during talking, so that background noise is provided for the user as reference, the user can better control the volume, and discomfort of surrounding people or a talking counterpart caused by overlarge sound is avoided. In addition, when the environment noise reduction starting condition is determined to be met according to the acquired sound energy and the environment noise energy of the user in the call process, the earphone is controlled to start the environment noise reduction function, namely, the adaptive environment noise reduction is realized, so that the interference of the environment noise to the call sound can be avoided, the improvement of high-quality voice signals to the call counterpart is facilitated, and the call quality is improved.
Drawings
FIG. 1 is a schematic flow diagram of a noise reduction method in one embodiment;
FIG. 2 is a flow diagram illustrating a process for detecting that a user is talking in one embodiment;
FIG. 3 is a flow diagram that illustrates the processing of the determine that a user is a target user in one embodiment;
FIG. 4 is a block diagram showing the structure of a noise reducing device in one embodiment;
fig. 5 is an internal structural diagram of an audio device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
< example 1>
In one embodiment, as shown in FIG. 1, a method of noise reduction is provided. The present embodiment is mainly illustrated by applying the noise reduction method to an audio device, such as a headphone. It is understood that the headset may be a wired headset, or may be a headset using wireless communication, such as a bluetooth headset.
As shown in fig. 1, the noise reduction method includes the following steps:
step S1: and when the earphone is in the active noise reduction mode, if the fact that the user is in a call is detected, the earphone is controlled to exit the active noise reduction mode.
Specifically, the earphone is in the active noise reduction mode, and the active noise reduction function is opened to the earphone promptly, and at this moment, the earphone can simulate out a frequency the same with the noise, and the sound wave of antiphase, can partly or all offset the noise to can effectively reduce the interference of external noise, provide an immersive experience for the user. For example, when a user listens to music or watches video, the headphones are in an active noise reduction mode, thereby providing a good sound effect experience for the user.
It can be understood that when a person speaks, based on background noise, the person can clearly perceive the volume emitted by the person, so that the speaking volume can be effectively controlled, and more balanced sound can be emitted. When the earphone is used for communication, if the active noise reduction function is continuously started, the background noise is greatly reduced due to the active noise reduction function, so that a user cannot clearly perceive the volume emitted by the user, the speaking volume cannot be effectively controlled, surrounding people can be influenced due to too large communication sound, discomfort can be brought to the opposite party of the communication, or the opposite party of the communication can not hear clearly due to too small communication sound, and the communication progress and communication feeling are influenced. Therefore, in the embodiment of the application, whether the user is talking is detected, if the user is talking, the earphone is controlled to exit the active noise reduction mode, namely, the active noise reduction function is closed, background noise is not reduced any more, a natural noise state is presented, so that the user can clearly perceive the volume emitted by the user, a comparison reference is provided for the speaking volume of the user, the speaking volume is further effectively controlled, discomfort brought to surrounding people and a party opposite to the conversation due to overlarge speaking sound is avoided, or the condition that the conversation process and the conversation feeling are influenced due to unclear listening of the party opposite to the conversation due to undersize speaking sound is avoided, and the balance of the conversation sound of the user is ensured. And if the user is not in the call, the corresponding action is not executed, namely the earphone does not exit the active noise reduction mode, and the active noise reduction function is continuously started.
Step S2: and acquiring the sound energy of the user and the environmental noise energy of the environment where the user is located in the call process.
Specifically, the voice of the user and the environmental noise of the environment where the user is located during the call process can be collected through an audio collection processing device such as a microphone, and the volume corresponding to the voice and the environmental noise are obtained through analysis. Specifically, the sound wave energy corresponding to the user's voice, that is, the user's voice energy, and the sound wave energy corresponding to the environmental noise of the environment where the user is located, that is, the environmental noise energy, may be obtained through analysis.
Step S3: and if the environment noise reduction starting condition is determined to be met according to the sound energy and the environment noise energy, controlling the earphone to start the environment noise reduction mode.
Specifically, the headset starts an Environmental Noise Cancellation (ENC) mode, that is, the headset can accurately calculate the speaking direction of the user through the dual-microphone array, and remove various interference noises in the environment while protecting the target voice in the main direction.
It can be understood that when a user makes a call through an earphone, various noises exist in the environment, which may interfere with the call sound, so that the opposite party of the call cannot receive a high-quality voice signal, thereby reducing the call quality. Therefore, in the embodiment of the present application, when the user makes a call through the headset, whether the start environment noise reduction condition is met is determined according to the sound energy and the environment noise energy obtained in the step S2, and if the start environment noise reduction condition is met, the headset is controlled to start the environment noise reduction mode, so that multiple noises in the environment are suppressed or eliminated, adaptive environment noise reduction is achieved, the environment noise immunity in the call process is improved, and a high-quality voice signal is provided for the call counterpart, thereby improving the call quality. And if the starting environment noise reduction condition is not met, the corresponding action is not executed, namely the environment noise reduction mode is not started.
According to the noise reduction method, when the fact that a user is using the earphone to talk is detected, the earphone is controlled to exit the active noise reduction mode, namely, the active noise reduction function is automatically turned off during the talking, so that background noise is provided for the user as reference, the user can control the volume better, and discomfort of surrounding people or the opposite party during the talking due to overlarge sound is avoided. In addition, when the environment noise reduction starting condition is determined to be met according to the acquired sound energy and the environment noise energy of the user in the call process, the earphone is controlled to start the environment noise reduction function, namely, the adaptive environment noise reduction is realized, so that the interference of the environment noise to the call sound can be avoided, the improvement of high-quality voice signals to the call counterpart is facilitated, and the call quality is improved.
In an embodiment of the present application, as shown in fig. 2, the step S1 of detecting that the user is talking includes the following steps:
step S11: and determining that the user is the target user.
Specifically, the target user is, for example, a user to which the earphone belongs, that is, the user currently in a call is determined to be the user to which the earphone belongs, so that misoperation caused by false detection is avoided, and reliability is improved. For example, when other people who are talking are detected, the earphone is controlled to exit the active noise reduction mode, so that misoperation is caused.
It can be understood that in some places with smaller space or areas with more dense people stream, such as shopping malls, the number of people is more, the crowd density is large, and the distance between people is smaller. At this moment, if the user does not talk but listens to music, the earphone is in the active noise reduction mode, if people around the user talk, the earphone may recognize the talk sound at this moment due to the small distance between the earphone and the user, and the user is mistakenly believing that the user is talking, the active noise reduction mode may be exited, so that misoperation is caused, and in fact, the user listens to music, and the active noise reduction mode is exited at this moment, so that the use experience of the user is greatly influenced, and the use experience of the user is reduced. Therefore, in the embodiment of the application, the user who is in a conversation is determined as a target user, namely the user to which the earphone belongs, so that the situation that the use feeling and the use experience of the user are influenced due to misidentification and misoperation can be prevented, and the reliability is improved.
In other words, step S11 is to determine that the person who is talking is the user himself, not the other person.
Step S12: and if the volume of the target user in the call process is higher than a preset volume threshold, judging that the user is in call.
Specifically, after the user who is in the process of calling is determined to be the target user, whether the sound volume of the target user in the process of calling meets a certain condition needs to be determined, namely whether the volume of the target user in the process of calling is higher than a preset volume threshold value is judged, if yes, the target user is judged to be in the process of calling, and therefore misidentification and misoperation are further avoided, and reliability is improved. If not, namely when the volume of the target user in the call process is smaller than or equal to the preset volume threshold, judging that the target user does not call, not executing any operation, and continuously keeping the active noise reduction mode by the earphone.
It can be understood that, in the normal conversation process, the speaking voice of the user can reach a certain degree, for example, a preset volume threshold value is reached, which is beneficial for the conversation counterpart to clearly receive the voice signal. If the sound of the user is small, the user is likely not in a call, for example, the user is talking with people around by a small voice, or the user is listening to music through an earphone and singing with a light voice, and if the sound with small volume is mistakenly recognized as the call sound, misoperation is caused, namely, the earphone exits the active noise reduction mode, so that the use experience and the use experience of the user are influenced. Therefore, in the embodiment of the application, after the target user is determined, whether the volume of the user is higher than a preset volume threshold needs to be further judged, when the volume of the user is determined to be higher than the preset volume threshold, the user is judged to be in a call, and at the moment, the earphone exits from the active noise reduction mode, so that the false recognition and the false operation are further avoided, the use experience and the use experience of the user are prevented from being influenced, and the reliability is improved.
In a specific example, the preset volume threshold is, for example, a preset volume threshold, and a value of the preset volume threshold is determined according to, for example, whether the target user is talking as accurately as possible. In an embodiment, the preset volume threshold is, for example, 40 db, that is, when it is recognized that the volume of the target user during the call is greater than 40 db, it is determined that the user is calling. Otherwise, the user is not in the conversation, and the earphone continues to keep the active noise reduction mode.
In an embodiment of the present application, as shown in fig. 3, the process of determining that the user is the target user in step S11 includes the following steps:
step S111: and identifying the voiceprint characteristics of the user in the call process.
Step S112: and matching the voiceprint characteristics with a preset reference voiceprint corresponding to the target user.
Specifically, for example, a reference voiceprint of a target user, that is, a user to which the earphone belongs, is stored in the earphone in advance, and furthermore, a voiceprint feature of the user actually acquired in the call process is matched with a reference voiceprint feature of the target user, which is stored in advance, so that it is convenient to accurately determine whether the user is the target user, that is, whether the user is the user to which the earphone belongs.
Step S113: and if the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
Specifically, the matching degree of the voiceprint features of the user actually acquired in the call process and the pre-stored reference voiceprint features of the target user is higher than a preset matching degree threshold value, and the user is determined to be the target user, namely the user to which the earphone belongs, so that the user identity can be accurately identified, the target user is determined, and false identification is prevented.
In a specific embodiment, the preset matching degree threshold is, for example, a preset value, and the value of the preset matching degree threshold is, for example, a value that is determined as accurate as possible whether the user in conversation is the target user. It can be understood that the preset matching degree threshold value is not too high or too low, and the too high value may result in environment disturbance, so that the target user cannot be identified, and a true abandoning error occurs; if the value is too low, the voice of other users who are not the target user may be recognized as the target user, so that a nano-false error occurs.
In a specific embodiment, the preset threshold of the matching degree is, for example, 95%.
In a specific embodiment, the process of detecting whether the user is talking includes, for example: first, a calling user is identified as a target user, but not other users. For example, the voiceprint feature of the target user, namely the reference voiceprint, is recorded in the earphone in advance, the voiceprint feature of the user actually acquired in the conversation process is compared with the reference voiceprint, and if the comparison result reaches a certain confidence level, such as 95%, the user in conversation is determined to be the target user, namely the user to which the earphone belongs, so that the error recognition is effectively avoided, and the recognition accuracy of the target user is improved. Further, whether the volume of the target user is higher than a preset volume threshold value is identified, if yes, it is determined that the user is making a call, and at the moment, the earphone exits the active noise reduction mode. Otherwise, the user is not in the conversation, and the earphone continues to keep the active noise reduction mode.
In one embodiment of the present application, the step S3 of determining that the start-up environmental noise reduction condition is satisfied according to the sound energy and the environmental noise energy includes: and if the ratio of the sound energy of the user to the environmental noise energy is greater than a preset signal-to-noise ratio threshold value, determining that the environment noise reduction starting condition is met, and starting the environment noise reduction mode by the earphone. Otherwise, namely the ratio of the sound energy of the user to the environmental noise energy is smaller than or equal to the preset signal-to-noise ratio threshold, determining that the environmental noise reduction starting condition is not met, and not starting the environmental noise reduction mode by the earphone.
In a specific embodiment, the preset signal-to-noise ratio threshold is a preset value, and the value of the preset signal-to-noise ratio threshold is determined according to, for example, the relationship between the sound energy and the ambient noise energy to determine whether the earphone meets the environment noise reduction starting condition as accurately as possible. In a specific example, the preset signal-to-noise ratio threshold is, for example, a value greater than 1, for example, 1.5.
Specifically, after obtaining the sound energy and the ambient noise energy of the user, a signal-to-noise ratio threshold can be set according to the sound energy and the ambient noise energy, and is expressed as: sound energy/ambient noise energy, i.e. the ratio of sound energy to ambient noise energy. It will be appreciated that the ambient noise reduction process is self-destructive to the desired acoustic signal, so that the ambient noise reduction mode is generally not enabled when the user's acoustic energy is less than or equal to the ambient noise energy, otherwise the user's acoustic noise will be cancelled. In other words, the preset signal-to-noise ratio threshold is generally set to a value greater than 1, for example, 1.5. That is, when the actual signal-to-noise ratio threshold is detected, that is, the ratio of the collected sound energy to the ambient noise energy is greater than the preset signal-to-noise ratio threshold, for example, 1.5, the ambient noise reduction mode is automatically started, so as to reduce the interference of the ambient noise, thereby providing a clear and high-quality voice signal for the other party of the call and improving the call quality.
Therefore, when the noise reduction method of the embodiment of the application is used for communication, if the user is detected to speak, the active noise reduction ANC function is automatically closed, and a natural background noise background state is presented, so that the user can effectively control the volume; furthermore, whether the environmental noise reduction ENC function is started or not can be automatically judged according to the current environmental noise, so that a voice signal with high quality can be provided for a conversation party, and the conversation quality is improved.
It should be understood that although the various steps in the flow charts of fig. 1-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
< example 2>
In one embodiment, as shown in FIG. 4, a noise reducing device is provided. The present embodiment is mainly illustrated by applying the noise reduction apparatus to an audio device, such as a headphone. It is understood that the headset may be a wired headset, or may be a headset using wireless communication, such as a bluetooth headset.
As shown in fig. 4, the noise reduction apparatus 100 includes: a first control module 110, an acquisition module 120, and a second control module 130.
The first control module 110 is configured to, when the headset is in the active noise reduction mode and it is detected that the user is talking, control the headset to exit the active noise reduction mode.
Specifically, the earphone is in the active noise reduction mode, and the active noise reduction function is opened to the earphone promptly, and at this moment, the earphone can simulate out a frequency the same with the noise, and the sound wave of antiphase, can partly or all offset the noise to can effectively reduce the interference of external noise, provide an immersive experience for the user. For example, when a user listens to music or watches video, the headphones are in an active noise reduction mode, thereby providing a good sound effect experience for the user.
It can be understood that when a person speaks, based on background noise, the person can clearly perceive the volume emitted by the person, so that the speaking volume can be effectively controlled, and more balanced sound can be emitted. When the earphone is used for communication, if the active noise reduction function is continuously started, the background noise is greatly reduced due to the active noise reduction function, so that a user cannot clearly perceive the volume emitted by the user, the speaking volume cannot be effectively controlled, surrounding people can be influenced due to too large communication sound, discomfort can be brought to the opposite party of the communication, or the opposite party of the communication can not hear clearly due to too small communication sound, and the communication progress and communication feeling are influenced. Therefore, in the embodiment of the application, whether the user is talking is detected, if the user is talking, the earphone is controlled to exit the active noise reduction mode, namely, the active noise reduction function is closed, background noise is not reduced any more, a natural noise state is presented, so that the user can clearly perceive the volume emitted by the user, a comparison reference is provided for the speaking volume of the user, the speaking volume is further effectively controlled, discomfort brought to surrounding people and a party opposite to the conversation due to overlarge speaking sound is avoided, or the condition that the conversation process and the conversation feeling are influenced due to unclear listening of the party opposite to the conversation due to undersize speaking sound is avoided, and the balance of the conversation sound of the user is ensured. And if the user is not in the call, the corresponding action is not executed, namely the earphone does not exit the active noise reduction mode, and the active noise reduction function is continuously started.
The obtaining module 120 is configured to obtain sound energy of the user during the call and ambient noise energy of an environment where the user is located.
Specifically, the obtaining module 120 includes, for example, an audio collecting and processing device such as a microphone, and the audio collecting and processing device such as the microphone can collect the user voice and the environmental noise of the environment where the user is located during the call, and analyze the user voice and the environmental noise to obtain the volume corresponding to each other. Specifically, the sound wave energy corresponding to the user's voice, that is, the user's voice energy, and the sound wave energy corresponding to the environmental noise of the environment where the user is located, that is, the environmental noise energy, may be obtained through analysis.
And the second control module 130 is configured to control the earphone to start the ambient noise reduction mode when it is determined that the start ambient noise reduction condition is satisfied according to the sound energy and the ambient noise energy.
Specifically, the earphone starts an environment noise reduction mode, namely the earphone can accurately calculate the speaking direction of a user through the double-microphone array, and remove various interference noises in the environment while protecting the target voice in the main direction.
It can be understood that when a user makes a call through an earphone, various noises exist in the environment, which may interfere with the call sound, so that the opposite party of the call cannot receive a high-quality voice signal, thereby reducing the call quality. Therefore, in the embodiment of the present application, when a user makes a call through an earphone, according to the sound energy and the environmental noise energy obtained by the obtaining module 120, the second control module 130 determines whether the environment noise reduction starting condition is satisfied, and if the environment noise reduction starting condition is satisfied, the earphone is controlled to start the environment noise reduction mode, so as to suppress or eliminate multiple noises in the environment, implement adaptive environment noise reduction, improve the anti-interference performance of the environmental noise during the call, ensure that a high-quality voice signal is provided for the other party of the call, and thus improve the call quality. And if the starting environment noise reduction condition is not met, the corresponding action is not executed, namely the environment noise reduction mode is not started.
In the noise reduction device 100, when it is detected that the user is using the earphone to talk, the earphone is controlled to exit the active noise reduction mode, that is, the active noise reduction function is automatically turned off during the talk, so as to provide background noise for the user as a reference, which is beneficial to the user to control the volume better, and avoid the discomfort of surrounding people or the opposite party of the talk caused by too much sound. In addition, when the environment noise reduction starting condition is determined to be met according to the acquired sound energy and the environment noise energy of the user in the call process, the earphone is controlled to start the environment noise reduction function, namely, the adaptive environment noise reduction is realized, so that the interference of the environment noise to the call sound can be avoided, the improvement of high-quality voice signals to the call counterpart is facilitated, and the call quality is improved.
In an embodiment of the present application, the process of detecting that the user is talking by the first control module 110 specifically includes: and when the user is determined to be the target user and the volume of the target user in the call process is higher than a preset volume threshold, judging that the user is in call.
Specifically, the target user is, for example, a user to which the earphone belongs, that is, the user currently in a call is determined to be the user to which the earphone belongs, so that misoperation caused by false detection is avoided, and reliability is improved. For example, when other people who are talking are detected, the earphone is controlled to exit the active noise reduction mode, so that misoperation is caused.
It can be understood that in some places with smaller space or areas with more dense people stream, such as shopping malls, the number of people is more, the crowd density is large, and the distance between people is smaller. At this moment, if the user does not talk but listens to music, the earphone is in the active noise reduction mode, if people around the user talk, the earphone may recognize the talk sound at this moment due to the small distance between the earphone and the user, and the user is mistakenly believing that the user is talking, the active noise reduction mode may be exited, so that misoperation is caused, and in fact, the user listens to music, and the active noise reduction mode is exited at this moment, so that the use experience of the user is greatly influenced, and the use experience of the user is reduced. Therefore, in the embodiment of the application, the user who is in a conversation is determined as a target user, namely the user to which the earphone belongs, so that the situation that the use feeling and the use experience of the user are influenced due to misidentification and misoperation can be prevented, and the reliability is improved.
Furthermore, after the user who is in the process of calling is determined to be the target user, whether the sound volume of the target user in the process of calling meets a certain condition needs to be determined, namely whether the volume of the target user in the process of calling is higher than a preset volume threshold value is judged, and if yes, the target user is judged to be in the process of calling, so that false recognition and false operation are further avoided, and reliability is improved. If not, namely when the volume of the target user in the call process is smaller than or equal to the preset volume threshold, judging that the target user does not call, not executing any operation, and continuously keeping the active noise reduction mode by the earphone.
It can be understood that, in the normal conversation process, the speaking voice of the user can reach a certain degree, for example, a preset volume threshold value is reached, which is beneficial for the conversation counterpart to clearly receive the voice signal. If the sound of the user is small, the user is likely not in a call, for example, the user is talking with people around by a small voice, or the user is listening to music through an earphone and singing with a light voice, and if the sound with small volume is mistakenly recognized as the call sound, misoperation is caused, namely, the earphone exits the active noise reduction mode, so that the use experience and the use experience of the user are influenced. Therefore, in the embodiment of the application, after the target user is determined, whether the volume of the user is higher than a preset volume threshold needs to be further judged, when the volume of the user is determined to be higher than the preset volume threshold, the user is judged to be in a call, and at the moment, the earphone exits from the active noise reduction mode, so that the false recognition and the false operation are further avoided, the use experience and the use experience of the user are prevented from being influenced, and the reliability is improved.
In a specific example, the preset volume threshold is, for example, a preset volume threshold, and a value of the preset volume threshold is determined according to, for example, whether the target user is talking as accurately as possible. In an embodiment, the preset volume threshold is, for example, 40 db, that is, when it is recognized that the volume of the target user during the call is greater than 40 db, it is determined that the user is calling. Otherwise, the user is not in the conversation, and the earphone continues to keep the active noise reduction mode.
In an embodiment of the present application, the process of determining that the user is the target user by the first control module 110 specifically includes: identifying the voiceprint characteristics of a user in the call process; matching the voiceprint characteristics with a preset reference voiceprint corresponding to a target user; and when the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
Specifically, for example, a reference voiceprint of a target user, that is, a user to which the earphone belongs, is stored in the earphone in advance, and furthermore, a voiceprint feature of the user actually acquired in the call process is matched with a reference voiceprint feature of the target user, which is stored in advance, so that it is convenient to accurately determine whether the user is the target user, that is, whether the user is the user to which the earphone belongs. And if the matching degree of the voiceprint features of the user actually acquired in the call process and the pre-stored reference voiceprint features of the target user is higher than a preset matching degree threshold value, the user is determined to be the target user, namely the user to which the earphone belongs, so that the identity of the user can be accurately identified, the target user is determined, and false identification is prevented.
In a specific embodiment, the preset matching degree threshold is, for example, a preset value, and the value of the preset matching degree threshold is, for example, a value that is determined as accurate as possible whether the user in conversation is the target user. It can be understood that the preset matching degree threshold value is not too high or too low, and the too high value may result in environment disturbance, so that the target user cannot be identified, and a true abandoning error occurs; if the value is too low, the voice of other users who are not the target user may be recognized as the target user, so that a nano-false error occurs.
In a specific embodiment, the preset threshold of the matching degree is, for example, 95%.
In a specific embodiment, the process of the first control module 110 detecting whether the user is talking includes, for example: first, a calling user is identified as a target user, but not other users. For example, the voiceprint feature of the target user, namely the reference voiceprint, is recorded in the earphone in advance, the voiceprint feature of the user actually acquired in the conversation process is compared with the reference voiceprint, and if the comparison result reaches a certain confidence level, such as 95%, the user in conversation is determined to be the target user, namely the user to which the earphone belongs, so that the error recognition is effectively avoided, and the recognition accuracy of the target user is improved. Further, whether the volume of the target user is higher than a preset volume threshold value is identified, if yes, it is determined that the user is making a call, and at the moment, the earphone exits the active noise reduction mode. Otherwise, the user is not in the conversation, and the earphone continues to keep the active noise reduction mode.
In an embodiment of the present application, the determining, by the second control module 130, a process of meeting the starting environment noise reduction condition according to the sound energy and the environment noise energy specifically includes: and when the ratio of the sound energy of the user to the environment noise energy is larger than a preset signal-to-noise ratio threshold value, determining that the environment noise reduction starting condition is met, and starting the environment noise reduction mode by the earphone. Otherwise, namely the ratio of the sound energy of the user to the environmental noise energy is smaller than or equal to the preset signal-to-noise ratio threshold, determining that the environmental noise reduction starting condition is not met, and not starting the environmental noise reduction mode by the earphone.
In a specific embodiment, the preset signal-to-noise ratio threshold is a preset value, and the value of the preset signal-to-noise ratio threshold is determined according to, for example, the relationship between the sound energy and the ambient noise energy to determine whether the earphone meets the environment noise reduction starting condition as accurately as possible. In a specific example, the preset signal-to-noise ratio threshold is, for example, a value greater than 1, for example, 1.5.
Specifically, after obtaining the sound energy and the ambient noise energy of the user, a signal-to-noise ratio threshold can be set according to the sound energy and the ambient noise energy, and is expressed as: sound energy/ambient noise energy, i.e. the ratio of sound energy to ambient noise energy. It will be appreciated that the ambient noise reduction process is self-destructive to the desired acoustic signal, so that the ambient noise reduction mode is generally not enabled when the user's acoustic energy is less than or equal to the ambient noise energy, otherwise the user's acoustic noise will be cancelled. In other words, the preset snr threshold value is generally set to a value greater than 1, for example, 1.5. That is, when the actual signal-to-noise ratio threshold is detected, that is, the ratio of the collected sound energy to the ambient noise energy is greater than the preset signal-to-noise ratio threshold, for example, 1.5, the ambient noise reduction mode is automatically started, so as to reduce the interference of the ambient noise, thereby providing a clear and high-quality voice signal for the other party of the call and improving the call quality.
Therefore, when the noise reduction device 100 of the embodiment of the application is used for a call, if it is detected that the user speaks, the active noise reduction ANC function is automatically turned off, and a natural background noise-background state is presented, so that the user can effectively control the volume; furthermore, whether the environmental noise reduction ENC function is started or not can be automatically judged according to the current environmental noise, so that a voice signal with high quality can be provided for a conversation party, and the conversation quality is improved.
For specific limitations of the noise reduction apparatus 100, reference may be made to the above limitations of the noise reduction method, which will not be described herein again. The respective modules in the noise reduction apparatus may be wholly or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
< example 3>
In one embodiment, an audio device is provided, which may be a headset, the internal structure of which may be as shown in fig. 5. The audio device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the audio device is configured to provide computing and control capabilities. The memory of the audio 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 communication interface of the audio device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, Near Field Communication (NFC), Bluetooth or other technologies. The computer program is executed by a processor to implement a noise reduction method. The display screen of the audio equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the audio 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 audio equipment, an external keyboard, a touch pad or a mouse and the like.
It will be understood by those skilled in the art that the configuration shown in fig. 5 is a block diagram of only a portion of the configuration relevant to the present application, and does not constitute a limitation on the audio device to which the present application is applied, and a particular audio device may include more or less components than those shown in the drawings, or combine certain components, or have a different arrangement of components.
In one embodiment, the noise reduction apparatus provided in the present application may be implemented in the form of a computer program that is executable on an audio device as shown in fig. 5. The memory of the audio device may store various program modules constituting the noise reduction apparatus, such as the first control module 110, the obtaining module 120, and the second control module 130 shown in fig. 4. The computer program constituted by the respective program modules causes the processor to execute the steps in the noise reduction method of the respective embodiments of the present application described in the present specification.
For example, the audio device shown in fig. 5 may perform the aforementioned step S1 through the first control module 110 in the noise reduction apparatus shown in fig. 4. The audio device may perform the aforementioned step S2 through the obtaining module 120. The audio device may perform the aforementioned step S3 through the second control module 130.
In one embodiment, there is provided an audio device comprising a memory storing a computer program and a processor implementing the following steps when the processor executes the computer program:
step S1: and when the earphone is in the active noise reduction mode, if the fact that the user is in a call is detected, the earphone is controlled to exit the active noise reduction mode.
Step S2: and acquiring the voice energy and the environmental noise energy of the user in the call process.
Step S3: and if the environment noise reduction starting condition is determined to be met according to the sound energy and the environment noise energy, controlling the earphone to start the environment noise reduction mode.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
step S11: and determining that the user is the target user.
Step S12: and if the volume of the target user in the call process is higher than a preset volume threshold, judging that the user is in call.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
step S111: and identifying the voiceprint characteristics of the user in the call process.
Step S112: and matching the voiceprint characteristics with a preset reference voiceprint corresponding to the target user.
Step S113: and if the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the ratio of the sound energy of the user to the environmental noise energy is greater than a preset signal-to-noise ratio threshold, determining that the starting environmental noise reduction condition is met.
According to the audio equipment, when the user is detected to use the earphone for conversation, the earphone is controlled to exit the active noise reduction mode, namely, the active noise reduction function is automatically turned off during conversation, so that background noise is provided for the user as reference, the volume can be better controlled by the user, and discomfort of people around or the other party during conversation caused by overlarge sound is avoided. In addition, when the environment noise reduction starting condition is determined to be met according to the acquired sound energy and the environment noise energy of the user in the call process, the earphone is controlled to start the environment noise reduction function, namely, the adaptive environment noise reduction is realized, so that the interference of the environment noise to the call sound can be avoided, the improvement of high-quality voice signals to the call counterpart is facilitated, and the call quality is improved.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
step S1: and when the earphone is in the active noise reduction mode, if the fact that the user is in a call is detected, the earphone is controlled to exit the active noise reduction mode.
Step S2: and acquiring the voice energy and the environmental noise energy of the user in the call process.
Step S3: and if the environment noise reduction starting condition is determined to be met according to the sound energy and the environment noise energy, controlling the earphone to start the environment noise reduction mode.
In one embodiment, the computer program when executed by the processor further performs the steps of:
step S11: and determining that the user is the target user.
Step S12: and if the volume of the target user in the call process is higher than a preset volume threshold, judging that the user is in call.
In one embodiment, the computer program when executed by the processor further performs the steps of:
step S111: and identifying the voiceprint characteristics of the user in the call process.
Step S112: and matching the voiceprint characteristics with a preset reference voiceprint corresponding to the target user.
Step S113: and if the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the ratio of the sound energy of the user to the environmental noise energy is greater than a preset signal-to-noise ratio threshold, determining that the starting environmental noise reduction condition is met.
The computer-readable storage medium of the embodiment of the application controls the earphone to exit the active noise reduction mode when detecting that the user is using the earphone for conversation, namely, the active noise reduction function is automatically turned off during conversation, so that background noise is provided for the user as reference, the volume can be better controlled by the user, and discomfort of surrounding people or a conversation party caused by overlarge sound is avoided. In addition, when the environment noise reduction starting condition is determined to be met according to the acquired sound energy and the environment noise energy of the user in the call process, the earphone is controlled to start the environment noise reduction function, namely, the adaptive environment noise reduction is realized, so that the interference of the environment noise to the call sound can be avoided, the improvement of high-quality voice signals to the call counterpart is facilitated, and the call quality is improved.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM is available in many forms, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), and the like.
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 (10)
1. A noise reduction method applied to earphones is characterized by comprising the following steps:
when the earphone is in an active noise reduction mode, if the fact that a user is in a call is detected, the earphone is controlled to exit the active noise reduction mode;
acquiring the sound energy and the environmental noise energy of the user in the communication process;
and if the starting environment noise reduction condition is determined to be met according to the sound energy and the environment noise energy, controlling the earphone to start an environment noise reduction mode.
2. The method of claim 1, wherein the process of detecting that the user is talking comprises:
determining that the user is a target user;
and if the volume of the target user in the call process is higher than a preset volume threshold, judging that the user is in call.
3. The method of claim 2, wherein the process of determining that the user is a target user comprises:
identifying the voiceprint characteristics of the user in the call process;
matching the voiceprint features with a preset reference voiceprint corresponding to the target user;
and if the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
4. The method according to any one of claims 1-3, wherein said determining from said sound energy and ambient noise energy that an ambient noise reduction condition is met comprises:
and if the ratio of the sound energy of the user to the environment noise energy is greater than a preset signal-to-noise ratio threshold, determining that the starting environment noise reduction condition is met.
5. A noise reduction device applied to earphones, the device comprising:
the first control module is used for controlling the earphone to exit from the active noise reduction mode when detecting that a user is in a call when the earphone is in the active noise reduction mode;
the acquisition module is used for acquiring the sound energy and the environmental noise energy of the user in the conversation process;
and the second control module is used for controlling the earphone to start the environmental noise reduction mode when determining that the starting environmental noise reduction condition is met according to the sound energy and the environmental noise energy.
6. The apparatus of claim 5, wherein the first control module is specifically configured to: and when the user is determined to be a target user and the volume of the target user in the call process is higher than a preset volume threshold value, judging that the user is detected to be in the call.
7. The apparatus of claim 6, wherein the first control module is specifically configured to:
identifying the voiceprint characteristics of the user in the call process;
matching the voiceprint features with a preset reference voiceprint corresponding to the target user;
and when the matching degree is higher than a preset matching degree threshold value, determining that the user is the target user.
8. The apparatus according to any one of claims 5 to 7, wherein the second control module is specifically configured to: and when the ratio of the sound energy of the user to the environment noise energy is larger than a preset signal-to-noise ratio threshold, determining that the starting environment noise reduction condition is met.
9. An audio device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the noise reduction method according to any one of claims 1 to 4 when executing the computer program.
10. 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 noise reduction method according to any one of claims 1 to 4.
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| PCT/CN2021/101463 WO2022151657A1 (en) | 2021-01-18 | 2021-06-22 | Noise cancellation method and apparatus, and audio device and computer-readable storage medium |
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