CN112289336A - Audio signal processing method and device - Google Patents
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
- G10L25/51—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
- G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
Abstract
The application discloses an audio signal processing method and device, and belongs to the technical field of communication. The method comprises the following steps: the method comprises the steps of obtaining a first audio signal collected by a microphone and a second audio signal sent by the microphone, determining a microphone to be rechecked, wherein the intensity of the first audio signal is not lower than a corresponding intensity threshold value, determining an echo path of the microphone to be rechecked, and processing the first audio signal collected by the microphone, the echo path of which accords with a preset condition, under the condition that the microphone to be rechecked comprises the microphone, the echo path of which does not accord with the preset condition, so as to obtain a target audio signal. In the process of processing the audio signal, after the first microphone blocking detection, the second microphone blocking detection is carried out on a plurality of microphones which are detected normally according to the change of echo paths of the microphones, so that the abnormal audio signal can be prevented from being used when the microphone blocking detection is wrong, and the quality of the target audio signal can be improved.
Description
Technical Field
The present application belongs to the field of communication technologies, and in particular, to an audio signal processing method and apparatus.
Background
With the development of electronic technology, electronic devices usually adopt a multi-microphone design, and multiple microphones collect audio signals at different positions of the electronic devices, and combine the audio signals at different positions to process the audio signals to obtain target audio signals. For example, the electronic device adopts a dual-microphone design, and two microphones arranged at two ends of the electronic device can respectively collect audio signals at two positions, and the two audio signals are processed to obtain a target audio signal, so that the effect of reducing noise of the dual microphones is achieved.
When the multi-microphone design is adopted, in the voice communication process, the microphone is shielded by hands or other foreign matters, the microphone is blocked, and the audio signal acquired by the microphone with the microphone is abnormal. If the target audio signal is obtained by adopting the abnormal audio signal processing, the problems that the sound of a user in the audio signal collected by the normal microphone is suppressed, the noise and the echo cannot be removed and the like may be caused. Therefore, when the electronic device adopts a multi-microphone design, in the voice communication process, whether each microphone is blocked needs to be detected, and the audio signals collected by the microphones without the microphone are processed to obtain the target audio signals.
In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: in the microphone blockage detection process, audio signals sent by a loudspeaker in the electronic equipment are transmitted to the microphone through the internal structure of the electronic equipment, so that microphone blockage detection is wrong, the audio signals cannot be correctly selected, and the quality of target audio signals is reduced.
Content of application
The embodiment of the application aims to provide an audio signal processing method and an audio signal processing device, which can solve the problems that microphone blockage detection is wrong and an audio signal cannot be correctly selected.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides an audio signal processing method, where the method includes:
acquiring first audio signals collected by the at least two microphones and second audio signals sent by second electronic equipment;
determining a microphone to be re-detected, of which the intensity of the first audio signal is not lower than a corresponding intensity threshold, from the at least two microphones;
under the condition that the number of the microphones to be rechecked is at least two, determining echo paths of the microphones to be rechecked according to the first audio signals and the second audio signals collected by the microphones to be rechecked; the echo path is used for representing a propagation path of the second audio signal to the microphone to be rechecked;
and under the condition that the microphone to be rechecked comprises a microphone with an echo path which does not accord with the preset condition, processing a first audio signal collected by the microphone with the echo path which accords with the preset condition to obtain a target audio signal.
In a second aspect, an embodiment of the present application provides an audio signal processing apparatus, including:
the acquisition module is used for acquiring first audio signals acquired by the at least two microphones and second audio signals sent by second electronic equipment;
the first determining module is used for determining a microphone to be rechecked, which has the intensity of the first audio signal not lower than the corresponding intensity threshold value, from the at least two microphones;
a second determining module, configured to determine, when the number of the microphones to be retested is at least two, an echo path of the microphone to be retested according to the first audio signal and the second audio signal acquired by the microphones to be retested; the echo path is used for representing a propagation path of the second audio signal to the microphone to be rechecked;
and the processing module is used for processing the first audio signal collected by the microphone with the echo path meeting the preset condition to obtain a target audio signal under the condition that the microphone to be rechecked comprises the microphone with the echo path not meeting the preset condition.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, the program or instructions implement the steps of the method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the first aspect.
In a fifth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.
In the embodiment of the application, first audio signals collected by at least two microphones and second audio signals sent by a second electronic device are obtained, microphones to be rechecked, the intensities of which are not lower than corresponding intensity thresholds, are determined from the at least two microphones, echo paths of the microphones to be rechecked are determined according to the first audio signals and the second audio signals collected by the microphones to be rechecked under the condition that the number of the microphones to be rechecked is at least two, and the first audio signals collected by the microphones, the echo paths of which meet preset conditions, are processed under the condition that the microphones to be rechecked include microphones, the echo paths of which do not meet the preset conditions, so that target audio signals are obtained. For the electronic equipment adopting the multi-microphone design, in the process of processing the audio signal, after the first microphone blocking detection, if a plurality of microphones which are detected normally exist, the second microphone blocking detection is carried out on the plurality of microphones which are detected normally according to the change of echo paths of the microphones, so that the abnormal audio signal can be prevented from being used when the first microphone blocking detection is wrong, and the quality of the target audio signal can be improved.
Drawings
FIG. 1 is a flow chart of steps of a method of audio signal processing provided in accordance with an exemplary embodiment;
FIG. 2 is a schematic diagram of an echo cancellation algorithm provided in accordance with an exemplary embodiment;
FIG. 3 is a flow chart of steps of another audio signal processing method provided in accordance with an exemplary embodiment;
fig. 4 is a block diagram of an audio signal processing apparatus provided in accordance with an exemplary embodiment;
FIG. 5 is a block diagram of an electronic device provided in accordance with an exemplary embodiment;
fig. 6 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The term "session" refers to a single use of an Application (App), the Application presenting from non-foreground to foreground (including cold and hot starts of the Application) as the beginning of the session, and the Application switching from foreground to non-foreground (including returning to the desktop, killing processes, switching to other applications, etc.) as the end of the session.
The audio signal processing method provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of an audio signal processing method according to an exemplary embodiment, where the method is applied to a first electronic device having at least two microphones, as shown in fig. 1, and may include:
The electronic device may be integrated with a plurality of microphones, for example, a mobile phone adopting a three-microphone design may include three microphones disposed at different positions of the mobile phone.
In this embodiment, the first electronic device and the second electronic device may respectively collect audio signals through the plurality of microphones during a voice call. For example, in a mobile phone adopting a three-microphone design, after the first electronic device establishes voice communication with the second electronic device, the first microphone may be controlled to acquire sound information around the electronic device (including sound information of a user and sound information in the environment) to acquire the first audio signal a, and similarly, the second microphone may be controlled to acquire the first audio signal B, and the third microphone may be controlled to acquire the first audio signal C. Meanwhile, the first electronic device may receive a second audio signal transmitted by the second electronic device through voice communication.
The electronic device can perform framing processing on the first audio signal and the second audio signal in the process of acquiring the first audio signal and the second audio signal because the audio signals are continuous signals. For example, a length of one frame of audio signal may be set to 10 milliseconds (ms), and the electronic device may acquire one frame of the first audio signal a, one frame of the first audio signal B, and one frame of the first audio signal C, and one frame of the second audio signal having a length of 10 ms. The specific number of microphones in the electronic device may be set according to requirements, for example, the number of microphones may be two, three, or four, which is not limited in this embodiment.
And 102, determining a microphone to be rechecked, wherein the intensity of the first audio signal is not lower than the corresponding intensity threshold value, from at least two microphones.
When the intensity of the first audio signal collected by the microphone is greater than or equal to (not lower than) the corresponding intensity threshold, determining that the microphone is not blocked and is the microphone to be rechecked; conversely, it can be determined that the microphone is blocked. And if the microphone to be rechecked is the microphone with normal first microphone blockage detection, carrying out second microphone blockage detection to determine whether the first microphone blockage detection is misjudged. The specific value of the intensity threshold value can be set according to requirements, and the intensity threshold values corresponding to different microphones can be the same or different.
In this embodiment, after obtaining the first audio signal respectively collected by each microphone, the first electronic device may perform, according to the first audio signal collected by each microphone, first microphone blocking detection on each microphone, and determine a microphone without microphone blocking, that is, a microphone to be re-detected. For example, for a first microphone, a frame of the first audio signal a includes three sampling points D (n-2), D (n-1), and D (n), "n" represents the current time (in practical applications, a frame of the first audio signal includes a large number of sampling points), the first electronic device may first determine the absolute values of D (n-2), D (n-1), and D (n), and then calculate the sum of all the absolute values to obtain the intensity value of the first audio signal a. Similarly, the intensity value of the audio signal B and the intensity value of the first audio signal C can be calculated. The intensity of the first audio signal a may be represented in different manners, for example, an absolute value of each sampling point in the first audio signal a may be calculated, and then an average value of all the absolute values is calculated to obtain an intensity value of the first audio signal a. The representation manner of the first audio signal strength may be set according to requirements, and this embodiment does not limit this.
After calculating the intensity value of each first audio signal, the first electronic device may compare the intensity value of each first audio signal with a corresponding intensity threshold value, respectively, to determine whether wheat blocking occurs. For example, after calculating the intensity value of the first audio signal a, the intensity value of the first audio signal a may be compared with an intensity threshold a corresponding to the first microphone, and if the intensity value of the first audio signal a is smaller than the intensity threshold a, it may be determined that the first microphone is blocked. Similarly, the intensity value of the first audio signal B may be compared with the intensity threshold B corresponding to the second microphone, if the intensity value of the first audio signal B is not lower than the intensity threshold B, it may be determined that the second microphone is not blocked, and the intensity value of the first audio signal C is compared with the intensity threshold C corresponding to the third microphone, if the intensity value of the first audio signal C is not lower than the intensity threshold C, it may be determined that the third microphone is not blocked, so as to determine that the microphone to be re-detected includes the second microphone and the third microphone, and complete the first blocking detection of all the microphones.
And 103, determining an echo path of the microphone to be retested according to the first audio signal and the second audio signal acquired by the microphone to be retested under the condition that the number of the microphones to be retested is at least two.
The echo path is used for representing a propagation path of the second audio signal to the microphone to be re-detected. After the first electronic device acquires the second audio signal sent by the second electronic device, the first electronic device may play the second audio signal through a speaker. At this time, the environment of the electronic device has a second audio signal, and the first audio signal collected by the microphone includes an audio component corresponding to the second audio signal, that is, an echo collected by the microphone. The first electronic device can estimate the echo path of the microphone to be re-detected through the first audio signal and the second audio signal.
In this embodiment, when the number of the microphones to be rechecked is at least two, the second microphone blocking detection may be performed on the at least two microphones to be rechecked according to the change of the echo path of each microphone. With reference to the above example, for the second microphone, the first audio signal B and the second audio signal may be processed by an echo cancellation algorithm to obtain an echo path of the second microphone. As shown in fig. 2, fig. 2 is a schematic diagram of an echo cancellation algorithm, such as a Least Mean Square (LMS) algorithm, the second audio signal to be played by the loudspeaker is taken as a reference signal of the second microphone, the first audio signal B is taken as the input of the LSM algorithm, the echo path B of the second microphone is calculated to be [ H (n-4), H (n-3), H (n-2), H (n-1) and H (n) ], and calculating to obtain an echo estimation value B of the second microphone by combining the echo path B and the second audio signal, wherein the echo estimation value B is [ E (n-2), E (n-1), E (n) ], and the first audio signal B subtracts the echo estimation value B to obtain the audio signal after echo cancellation (only the echo path is used in the embodiment). As shown in fig. 2, the echo path of the second microphone represents the path of the second audio signal played out by the speaker through the external environment (first path) and into the second microphone after propagating through the internal structure of the first electronic device (second path). Similarly, an echo path C and an echo estimate C of the third microphone may be calculated.
The echo cancellation algorithm may also adopt any one of an LMS algorithm and a Normalized Least Mean Square (NLMS) algorithm, and the implementation does not specifically limit the echo cancellation algorithm.
And 104, under the condition that the microphone to be rechecked comprises a microphone with an echo path not meeting the preset condition, processing the first audio signal collected by the microphone with the echo path meeting the preset condition to obtain a target audio signal.
In this embodiment, after the echo path of each microphone to be retested is determined, the change state of the echo path of each microphone to be retested may be determined, and the microphone whose echo path meets the preset condition and the microphone whose echo path does not meet the preset condition are determined according to the change state of the echo path of each microphone to be retested, respectively. Illustratively, the mean square error of the echo path B and the echo path C may be calculated separately, and the mean square error of the echo path B and the echo path C represents the changing state of the echo path B and the echo path C, respectively. After the mean square error of the echo path B and the mean square error of the echo path C are obtained, if the mean square error of the echo path B is less than or equal to (does not exceed) a preset error, which is a preset condition, it may be determined that the echo path B meets the preset condition, and if the mean square error of the echo path C is greater than (exceeds) the preset error, it may be determined that the echo path C does not meet the preset condition. The specific value of the preset error may be set according to a requirement, and the method for representing the change state of the echo path may be set according to a requirement, which is not limited in the embodiments.
When the echo path does not meet the preset condition, the echo path of the microphone is changed greatly. As shown in fig. 2, the audio signal played by the speaker may be transmitted to the second microphone through the first path, or may be transmitted to the second microphone through the second path, and since the second path remains unchanged, when the echo path of the microphone changes greatly, it may be that the external environment (the first path) where the electronic device is located changes greatly, or the microphone is blocked by a foreign object, so that the first path changes; conversely, when the echo path meets the preset condition, the echo path of the microphone is unchanged or slightly changed, which indicates that the external environment where the electronic device is located is slightly changed or unchanged. Therefore, when the echo path of at least one of the at least two microphones to be rechecked is unchanged or has a small change, it can be determined that the external environment where the first electronic device is located is unchanged, and at this time, if the echo paths of the other microphones have a large change, it is indicated that the other microphones are blocked by foreign objects, and microphone blockage occurs.
With reference to the above example, after determining that the echo path of the second microphone meets the preset condition, it may be determined that the environment where the first electronic device is located is changed little or unchanged, and at the same time, the echo path of the third microphone does not meet the preset condition, and it may be determined that the third microphone is blocked. After the third microphone is blocked, the first audio signal C acquired by the third microphone is abnormal, and the first audio signal C cannot be used, so that the first audio signal B acquired by the second microphone can be processed to obtain the target audio signal.
In this embodiment, in the process of processing the first audio signal collected by the microphone whose echo path meets the preset condition, an audio processing algorithm may be selected according to the microphone whose echo path meets the preset condition, and the first audio signal collected by the microphone whose echo path meets the preset condition is processed. With reference to the foregoing example, if the second microphone is disposed at the top of the mobile phone, an audio processing algorithm for the microphone disposed at the top of the mobile phone may be selected from a plurality of preset audio processing algorithms, the first audio signal B is processed to obtain a target audio signal, and the target audio signal is sent to the second electronic device. Similarly, if the number of the microphones with the echo paths meeting the preset condition is two, the audio processing algorithm for the two microphones can be selected according to the two microphones, and the two collected first audio signals are processed to obtain the target audio signal. The specific implementation of the audio processing algorithm may be set according to the requirement, which is not limited in this embodiment.
Under normal conditions, when the microphone is blocked, the intensity of the first audio signal collected by the microphone is lower than the corresponding intensity threshold value, and the microphone with the blocked microphone can be determined through first-time microphone blocking detection. However, in the voice call process, the audio signal played by the speaker may be transmitted to the microphone through the internal structure of the electronic device, and when a microphone is blocked, the intensity of the audio signal collected by the microphone may not be lower than the corresponding intensity threshold value due to the audio signal transmitted through the second path, which may cause a detection error of the microphone, and the microphone with the microphone blocked cannot be detected. At this time, if the acquired audio signal is still processed using the original audio processing algorithm, the quality of the target audio signal may be degraded. For example, when the third microphone is blocked, if the first audio signal B and the first audio signal C are still processed by using the audio processing algorithms corresponding to the two microphones, the sound information of the user in the first audio signal B may be suppressed, or the noise and echo in the first audio signal B may not be removed.
To sum up, in this embodiment, a first audio signal acquired by at least two microphones and a second audio signal sent by a second electronic device are obtained, microphones to be rechecked, of which the intensities of the first audio signals are not lower than corresponding intensity thresholds, are determined from the at least two microphones, an echo path of the microphone to be rechecked is determined according to the corresponding first audio signal and the corresponding second audio signal when the number of the microphones to be rechecked is at least two, and the first audio signal acquired by the microphone, of which the echo path meets a preset condition, is processed when the microphone to be rechecked includes a microphone of which the echo path does not meet the preset condition, so as to obtain a target audio signal. For the electronic equipment adopting the multi-microphone design, in the process of processing the audio signal, after the first microphone blocking detection, if a plurality of microphones which are detected normally exist, the second microphone blocking detection is carried out on the plurality of microphones which are detected normally according to the change of echo paths of the microphones, so that the abnormal audio signal can be prevented from being used when the first microphone blocking detection is wrong, and the quality of the target audio signal can be improved.
As shown in fig. 3, fig. 3 is a flow chart of steps of another audio signal processing method provided according to an exemplary embodiment, which may include:
In this embodiment, when the number of the microphones to be re-detected is at least two, the echo path and the echo estimation value of each microphone may be determined by an echo cancellation algorithm according to the first audio signal and the second audio signal collected by each microphone, respectively. The process of determining the echo path and the echo estimation value may refer to step 103, which is not described in detail in this embodiment.
And step 304, determining that the intensity of the echo estimation value of at least one microphone to be rechecked is not lower than a corresponding intensity threshold value.
When the intensity of the echo estimation value is not lower than the intensity threshold, it indicates that the intensity of the audio signal collected by the microphone is greater than or equal to the corresponding intensity threshold due to the echo transmitted through the internal structure of the electronic device, which results in a first microphone blockage detection error. On the contrary, when the strength of the echo estimation value is lower than the strength threshold, it indicates that the echo transmitted through the internal structure of the electronic device will not cause the strength of the audio signal collected by the microphone to be greater than or equal to the corresponding strength threshold, and will not cause the first microphone blockage detection error.
In conjunction with step 104, after the echo estimation value B and the echo estimation value C are obtained through calculation, an echo strength value of the echo estimation value B may be calculated, and an echo strength value of the echo estimation value C may be calculated. If the intensity value of the echo estimation value B is not lower than the intensity threshold corresponding to the first microphone and/or the intensity value of the echo estimation value C is not lower than the intensity threshold corresponding to the second microphone, it may be determined that the audio signal played by the speaker would cause the intensity of the first audio signal B to be greater than or equal to the intensity threshold B and cause the intensity of the first audio signal C to be greater than or equal to the intensity threshold C. At this time, although the second microphone and the third microphone are normal in the first microphone blockage detection, the microphone blockage detection may be misjudged, and the second microphone blockage detection needs to be performed, and step 305 is continuously performed. The process of calculating the intensity value of the echo estimation value is the same as the process of calculating the intensity value of the first audio signal, which is not limited in this embodiment.
On the contrary, if the intensity of the echo estimation value of each microphone to be rechecked is lower than the corresponding intensity threshold, it is indicated that the audio signal played by the speaker does not affect the first microphone blocking detection, and the second microphone blocking detection is not required, and at this time, the step 305 does not need to be continuously executed, and the audio signal processing algorithm can be directly selected according to the second microphone and the third microphone to process the first audio signal B and the first audio signal C, so as to obtain the target audio signal.
In practical application, when the strength of the echo estimation value of at least one microphone to be rechecked is determined to be not lower than the corresponding strength threshold, second microphone blocking detection is executed, and when the strength of the echo estimation value of each microphone to be rechecked is determined to be lower than the corresponding strength threshold, second microphone blocking detection is not executed, so that the power consumption of the electronic equipment can be reduced, and the processing efficiency of audio signals can be improved.
Optionally, the method may further include:
and under the condition that the intensity of the echo estimation value of the microphone to be retested is lower than the corresponding intensity threshold value, processing the first audio signal acquired by the microphone to be retested to obtain a target audio signal.
In this embodiment, when the intensity of the echo estimation value of each microphone to be retested is lower than the corresponding intensity threshold, it may be determined that the audio signal played by the speaker cannot affect the microphone blocking for the first time, and at this time, the first audio signal collected by the plurality of microphones to be retested may be directly processed to obtain the target audio signal. With reference to the above example, when it is determined that the intensity value of the echo estimation value B is smaller than the intensity threshold corresponding to the second microphone and the intensity value of the echo estimation value C is smaller than the intensity threshold corresponding to the third microphone, the audio processing algorithms corresponding to the second microphone and the third microphone may be selected to process the first audio signal B and the second audio signal C, so as to obtain the target audio signal.
In practical application, when the intensity of the echo estimation value of each microphone to be retested is lower than the corresponding intensity threshold value, the first audio signal acquired by the microphone to be retested is processed to obtain a target audio signal, so that false detection in the first microphone blocking detection can be eliminated, and the accuracy of the audio signal processing process is improved.
Optionally, before step 304, the method may further include:
it is determined that the intensity of the second audio signal is not below the corresponding intensity threshold.
When the intensity of the second audio signal is not lower than the corresponding intensity threshold, the audio signal played by the loudspeaker can generate an echo; conversely, when the intensity of the second audio signal is below the corresponding intensity threshold, it indicates that the audio signal played out by the speaker is not echogenic.
In this embodiment, before step 304 is executed, it may be determined whether the intensity of the second audio signal is lower than a corresponding intensity threshold, and when the intensity of the second audio signal is lower than the corresponding intensity threshold, because the broadcast of the second audio signal cannot generate an echo, a first microphone blocking detection error may not be caused, step 304 is not executed, and a second microphone blocking detection is not performed. Conversely, when the intensity of the second audio signal is not lower than the corresponding intensity threshold, it indicates that an echo may be generated when the second audio signal is played, which may cause a first microphone blockage detection error, and then continues to perform a second microphone blockage detection.
In practical application, when the strength of the second audio signal is determined to be not lower than the corresponding strength threshold, the second microphone blocking detection is executed, and when the strength of the second audio signal is determined to be lower than the corresponding strength threshold, the second microphone blocking detection is not executed, so that the times of executing the second microphone blocking detection can be reduced, and the power consumption of the electronic equipment is reduced.
Optionally, the method may further include:
and under the condition that the intensity of the second audio signal is lower than the corresponding intensity threshold value, processing the first audio signal acquired by the microphone to be rechecked to obtain a target audio signal.
In this embodiment, when the intensity of the second audio signal is lower than the corresponding intensity threshold, it may be determined that the audio signal played by the speaker cannot generate an echo, and the first microphone blocking detection may not be affected. At this time, the second microphone blocking detection is not executed, and the first audio signal acquired by the microphone to be rechecked is directly processed to obtain the target audio signal. The microphone can be prevented from being blocked for the second time, and the power consumption of the electronic equipment is reduced.
Optionally, the method may further include:
and under the condition that the echo path of each microphone to be rechecked does not accord with the preset condition, processing the first audio signal collected by the microphone to be rechecked to obtain a target audio signal.
In this embodiment, when the echo path of each microphone to be retested does not meet the preset condition, it may be determined that the change of the echo path is caused by the change of the external environment, and at this time, the first audio signal collected by the plurality of microphones to be retested may be directly processed to obtain the target audio signal. In combination with the above example, when the echo paths of the second microphone and the third microphone do not meet the preset condition, the audio signal processing algorithm may be directly selected according to the second microphone and the third microphone, and the first audio signal B and the first audio signal C are processed to obtain the target audio signal.
In practical application, when the echo path of each microphone to be rechecked does not meet the corresponding preset condition, it can be determined that the change of the echo path is caused by the change of the external environment, the playing of the second audio signal does not cause the first microphone blocking detection error, and the accuracy of microphone blocking detection can be improved.
Optionally, the method may further include:
and under the condition that the echo path of each microphone to be rechecked meets the preset condition, processing the first audio signal acquired by the microphone to be rechecked to obtain a target audio signal.
In this embodiment, when the echo path of each microphone to be rechecked meets the preset condition, it may be determined that the environment in which the first electronic device is located does not change, and since the echo path of each microphone to be rechecked meets the preset condition, it may be determined that the playing of the second audio signal does not cause the first microphone blocking detection error, and therefore each microphone to be rechecked is not affected by the echo, and each microphone to be rechecked does not have microphone blocking. At this time, the audio signal processing algorithm may be directly selected according to the second microphone and the third microphone, and the first audio signal B and the first audio signal C may be processed to obtain the target audio signal.
It should be noted that, in the audio signal processing method provided in the embodiment of the present application, the execution main body may be an audio signal processing apparatus, or a control module used for executing the loaded audio signal processing method in the audio signal processing apparatus. In the embodiment of the present application, an audio signal processing apparatus is taken as an example to execute a method for processing a loaded audio signal, and the method for processing an audio signal provided in the embodiment of the present application is described.
Referring to fig. 4, fig. 4 is a block diagram of an audio signal processing apparatus according to an exemplary embodiment, and as shown in fig. 4, the apparatus 400 may include: an acquisition module 401, a first determination module 402, a second determination module 403, a third determination module 404 and a processing module 404.
The obtaining module 401 is configured to obtain first audio signals collected by at least two microphones and second audio signals sent by a second electronic device.
The first determining module 402 is configured to determine, from at least two microphones, a microphone to be re-detected, where the strength of the first audio signal is not lower than the corresponding strength threshold.
The second determining module 403 is configured to determine, when the number of the microphones to be retested is at least two, an echo path of the microphone to be retested according to the first audio signal and the second audio signal collected by the microphone to be retested; the echo path is used for representing a propagation path of the second audio signal to the microphone to be rechecked.
The processing module 404 is configured to, when the microphone to be rechecked includes a microphone whose echo path does not meet the preset condition, process the first audio signal acquired by the microphone whose echo path meets the preset condition, so as to obtain a target audio signal.
Optionally, the apparatus 400 may further include: a third determination module and a fourth determination module.
The third determining module is used for determining the echo estimation value of the microphone to be retested according to the first audio signal and the second audio signal collected by the microphone to be retested
The fourth determination module is used for determining that the strength of the echo estimation value of at least one microphone to be rechecked is not lower than the corresponding strength threshold.
The apparatus 400 may further include: and the fifth determining module is used for determining that the intensity of the second audio signal is not lower than the corresponding intensity threshold.
Optionally, the processing module 404 is further configured to process the first audio signal acquired by the microphone to be rechecked to obtain a target audio signal when the intensity of the second audio signal is lower than the corresponding intensity threshold; or processing the first audio signal acquired by the microphone to be rechecked to obtain a target audio signal under the condition that the intensity of the echo estimation value of the microphone to be rechecked is lower than the corresponding intensity threshold value.
Optionally, the processing module 404 is further configured to process the first audio signal acquired by each microphone to be retested to obtain the target audio signal under the condition that the echo path of each microphone to be retested does not meet the preset condition.
The audio signal processing apparatus in the embodiment of the present application may be an apparatus, and may also be a component, an integrated circuit, or a chip in a terminal. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
The audio signal processing apparatus in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The audio signal processing apparatus provided in the embodiment of the present application can implement each process implemented by the audio signal processing apparatus in the method embodiments of fig. 1 and fig. 3, and for avoiding repetition, details are not described here again.
To sum up, in this embodiment, a first audio signal acquired by at least two microphones and a second audio signal sent by a second electronic device are obtained, microphones to be rechecked, of which the intensities of the first audio signals are not lower than corresponding intensity thresholds, are determined from the at least two microphones, an echo path of the microphone to be rechecked is determined according to the corresponding first audio signal and the corresponding second audio signal when the number of the microphones to be rechecked is at least two, and the first audio signal acquired by the microphone, of which the echo path meets a preset condition, is processed when the microphone to be rechecked includes a microphone of which the echo path does not meet the preset condition, so as to obtain a target audio signal. For the electronic equipment adopting the multi-microphone design, in the process of processing the audio signal, after the first microphone blocking detection, if a plurality of microphones which are detected normally exist, the second microphone blocking detection is carried out on the plurality of microphones which are detected normally according to the change of echo paths of the microphones, so that the abnormal audio signal can be prevented from being used when the first microphone blocking detection is wrong, and the quality of the target audio signal can be improved.
Optionally, an embodiment of the present application further provides an electronic device, as shown in fig. 5, fig. 5 is a structural diagram of an electronic device according to an exemplary embodiment, where the electronic device includes a processor 501, a memory 502, and a program or an instruction stored in the memory 502 and capable of being executed on the processor 501, and when the program or the instruction is executed by the processor 501, the program or the instruction implements each process of the above-mentioned audio signal processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and the non-mobile electronic devices described above.
Fig. 6 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.
The electronic device 600 includes, but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and the like.
Those skilled in the art will appreciate that the electronic device 600 may further comprise a power source (e.g., a battery) for supplying power to the various components, and the power source may be logically connected to the processor 610 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The electronic device structure shown in fig. 6 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.
The processor 610 is configured to acquire a first audio signal acquired by at least two microphones and a second audio signal sent by a second electronic device;
determining a microphone to be rechecked, of which the intensity of the first audio signal is not lower than the corresponding intensity threshold, from at least two microphones;
under the condition that the number of the microphones to be rechecked is at least two, determining echo paths of the microphones to be rechecked according to a first audio signal and a second audio signal collected by the microphones to be rechecked; the echo path is used for representing a propagation path of the second audio signal to the microphone to be retested;
and under the condition that the microphone to be rechecked comprises a microphone with an echo path which does not accord with the preset condition, processing the first audio signal collected by the microphone with the echo path which accords with the preset condition to obtain a target audio signal.
In this embodiment, a first audio signal acquired by at least two microphones and a second audio signal sent by a second electronic device are acquired, microphones to be rechecked, of which the intensities of the first audio signals are not lower than corresponding intensity thresholds, are determined from the at least two microphones, an echo path of the microphone to be rechecked is determined according to the corresponding first audio signal and the second audio signal when the number of the microphones to be rechecked is at least two, and the first audio signal acquired by the microphone, of which the echo path meets a preset condition, is processed to obtain a target audio signal when the microphone to be rechecked includes the microphone of which the echo path does not meet the preset condition. For the electronic equipment adopting the multi-microphone design, in the process of processing the audio signal, after the first microphone blocking detection, if a plurality of microphones which are detected normally exist, the second microphone blocking detection is carried out on the plurality of microphones which are detected normally according to the change of echo paths of the microphones, so that the abnormal audio signal can be prevented from being used when the first microphone blocking detection is wrong, and the quality of the target audio signal can be improved.
The processor 610 is further configured to determine an echo estimation value of the microphone to be retested according to the first audio signal and the second audio signal acquired by the microphone to be retested;
and determining that the strength of the echo estimation value of at least one microphone to be rechecked is not lower than the corresponding strength threshold value.
In practical application, when the strength of the echo estimation value of at least one microphone to be rechecked is determined to be not lower than the corresponding strength threshold, second microphone blocking detection is executed, and when the strength of the echo estimation value of each microphone to be rechecked is determined to be lower than the corresponding strength threshold, second microphone blocking detection is not executed, so that the power consumption of the electronic equipment can be reduced, and the processing efficiency of audio signals can be improved.
Wherein the processor 610 is further configured to determine that the intensity of the second audio signal is not lower than the corresponding intensity threshold.
In practical application, when the strength of the second audio signal is determined not to be lower than the corresponding strength threshold, the second microphone blocking detection is executed, so that the times of executing the second microphone blocking detection can be reduced, and the power consumption of the electronic equipment is reduced.
The processor 610 is further configured to process the first audio signal acquired by the microphone to be retested to obtain a target audio signal when the intensity of the second audio signal is lower than the corresponding intensity threshold; alternatively, the first and second electrodes may be,
and under the condition that the intensity of the echo estimation value of the microphone to be retested is lower than the corresponding intensity threshold value, processing the first audio signal acquired by the microphone to be retested to obtain a target audio signal.
In practical application, when the intensity of the echo estimation value of each microphone to be retested is lower than the corresponding intensity threshold value, the first audio signal acquired by the microphone to be retested is processed to obtain a target audio signal, so that false detection in the first microphone blocking detection can be eliminated, and the accuracy of the audio signal processing process is improved.
The processor 610 is further configured to process the first audio signal acquired by each microphone to be retested to obtain a target audio signal under the condition that the echo path of each microphone to be retested does not meet the preset condition.
In practical application, when the echo path of each microphone to be rechecked does not meet the preset condition, it can be determined that the change of the echo path is caused by the change of the external environment, and the playing of the second audio signal does not cause the first microphone blocking detection error, so that the accuracy of microphone blocking detection is improved.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned audio signal processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the above-mentioned audio signal processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, 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 like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An audio signal processing method applied to a first electronic device having at least two microphones, the method comprising:
acquiring first audio signals collected by the at least two microphones and second audio signals sent by second electronic equipment;
determining a microphone to be re-detected, of which the intensity of the first audio signal is not lower than a corresponding intensity threshold, from the at least two microphones;
under the condition that the number of the microphones to be rechecked is at least two, determining echo paths of the microphones to be rechecked according to the first audio signals and the second audio signals collected by the microphones to be rechecked; the echo path is used for representing a propagation path of the second audio signal to the microphone to be rechecked;
and under the condition that the microphone to be rechecked comprises a microphone with an echo path which does not accord with the preset condition, processing a first audio signal collected by the microphone with the echo path which accords with the preset condition to obtain a target audio signal.
2. The method according to claim 1, wherein when the microphone to be rechecked includes a microphone whose echo path does not meet a preset condition, before processing the first audio signal collected by the microphone whose echo path meets the preset condition to obtain the target audio signal, the method further comprises:
determining an echo estimation value of the microphone to be retested according to the first audio signal and the second audio signal acquired by the microphone to be retested;
and determining that the intensity of the echo estimation value of at least one microphone to be rechecked is not lower than a corresponding intensity threshold value.
3. The method of claim 2, wherein before the determining that the strength of the echo estimate of at least one of the microphones to be re-examined is not below the corresponding strength threshold, further comprising:
determining that the intensity of the second audio signal is not below a corresponding intensity threshold.
4. The method of claim 3, further comprising:
under the condition that the intensity of the second audio signal is lower than the corresponding intensity threshold value, processing a first audio signal collected by the microphone to be rechecked to obtain the target audio signal; alternatively, the first and second electrodes may be,
and under the condition that the intensity of the echo estimation value of the microphone to be rechecked is lower than a corresponding intensity threshold value, processing a first audio signal acquired by the microphone to be rechecked to obtain the target audio signal.
5. The method according to any one of claims 1-4, further comprising:
and under the condition that the echo path of each microphone to be retested does not accord with the preset condition, processing the first audio signal acquired by the microphone to be retested to obtain the target audio signal.
6. An audio signal processing apparatus, provided in a first electronic device having at least two microphones, the apparatus comprising:
the acquisition module is used for acquiring first audio signals acquired by the at least two microphones and second audio signals sent by second electronic equipment;
the first determining module is used for determining a microphone to be rechecked, which has the intensity of the first audio signal not lower than the corresponding intensity threshold value, from the at least two microphones;
a second determining module, configured to determine, when the number of the microphones to be retested is at least two, an echo path of the microphone to be retested according to the first audio signal and the second audio signal acquired by the microphones to be retested; the echo path is used for representing a propagation path of the second audio signal to the microphone to be rechecked;
and the processing module is used for processing the first audio signal collected by the microphone with the echo path meeting the preset condition to obtain a target audio signal under the condition that the microphone to be rechecked comprises the microphone with the echo path not meeting the preset condition.
7. The apparatus of claim 6, further comprising:
a third determining module, configured to determine an echo estimation value of the microphone to be retested according to the first audio signal and the second audio signal acquired by the microphone to be retested;
and the fourth determination module is used for determining that the intensity of the echo estimation value of at least one microphone to be rechecked is not lower than the corresponding intensity threshold value.
8. The apparatus of claim 7, further comprising:
a fifth determining module for determining that the intensity of the second audio signal is not lower than the corresponding intensity threshold.
9. The apparatus according to claim 8, wherein the processing module is further configured to process the first audio signal collected by the microphone to be rechecked to obtain the target audio signal, if the intensity of the second audio signal is lower than a corresponding intensity threshold; alternatively, the first and second electrodes may be,
and under the condition that the intensity of the echo estimation value of the microphone to be rechecked is lower than a corresponding intensity threshold value, processing a first audio signal acquired by the microphone to be rechecked to obtain the target audio signal.
10. The apparatus according to any one of claims 6 to 9, wherein the processing module is further configured to, under the condition that the echo path of each microphone to be retested does not meet the preset condition, process the first audio signal collected by the microphone to be retested to obtain the target audio signal.
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