CN111933167B - Noise reduction method and device of electronic equipment, storage medium and electronic equipment - Google Patents
Noise reduction method and device of electronic equipment, storage medium and electronic equipment Download PDFInfo
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- CN111933167B CN111933167B CN202010791409.5A CN202010791409A CN111933167B CN 111933167 B CN111933167 B CN 111933167B CN 202010791409 A CN202010791409 A CN 202010791409A CN 111933167 B CN111933167 B CN 111933167B
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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
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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
Abstract
The embodiment of the application discloses a noise reduction method and device of electronic equipment, a storage medium and the electronic equipment, wherein the embodiment of the application acquires a first sound signal detected by a first sound receiving component and a second sound signal detected by a second sound receiving component; calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal; when the first signal-to-noise ratio is not equal to the second signal-to-noise ratio, determining a main sound receiving component and an environment sound receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving component is larger than that of the sound signal of the environment sound receiving component; and carrying out noise reduction treatment on the sound signal of the main sound receiving component according to the sound signal of the environment sound receiving component, eliminating noise in the sound signal of the main sound receiving component, obtaining a target sound signal and improving the signal to noise ratio of the target sound signal.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a noise reduction method and device for electronic equipment, a storage medium and the electronic equipment.
Background
With the development of technology, people are increasingly using intelligent wearable devices, such as intelligent glasses, intelligent helmets, intelligent bracelets and the like.
The wearing equipment is generally provided with a microphone to realize voice related functions such as voice call, network call, voice wakeup, voice recognition, recording and the like. However, in some usage scenarios, such as outdoor environments, there may be some noise interference, resulting in a larger signal-to-noise ratio of the sound signal acquired by the wearable device.
Disclosure of Invention
The embodiment of the application provides a noise reduction method and device for electronic equipment, a storage medium and the electronic equipment, and can realize noise reduction processing on sound signals detected by the electronic equipment.
In a first aspect, an embodiment of the present application provides a noise reduction method of an electronic device, including:
acquiring a first sound signal detected by the first sound receiving component and a second sound signal detected by the second sound receiving component;
calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
determining a main sound receiving assembly and an environment sound receiving assembly according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving assembly is larger than that of the sound signal of the environment sound receiving assembly;
And carrying out noise reduction processing on the sound signal of the main sound receiving assembly according to the sound signal of the environment sound receiving assembly to obtain a target sound signal.
In a second aspect, an embodiment of the present application further provides a noise reduction device of an electronic device, including:
the signal acquisition module is used for acquiring a first sound signal detected by the first sound receiving component and a second sound signal detected by the second sound receiving component;
the signal-to-noise ratio calculation module is used for calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
the component selection module is used for determining a main sound receiving component and an environment sound receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving component is larger than that of the sound signal of the environment sound receiving component;
and the signal processing module is used for carrying out noise reduction processing on the sound signal of the main sound receiving assembly according to the sound signal of the environment sound receiving assembly to obtain a target sound signal.
In a third aspect, embodiments of the present application further provide a storage medium having stored thereon a computer program which, when run on a computer, causes the computer to perform a noise reduction method of an electronic device as provided in any embodiment of the present application.
In a fourth aspect, embodiments of the present application further provide an electronic device, including a processor and a memory, where the memory has a computer program, and the processor is configured to execute the noise reduction method of the electronic device provided in any embodiment of the present application by calling the computer program.
According to the technical scheme, the first sound signal detected by the first sound receiving component is obtained, the second sound signal detected by the second sound receiving component is calculated, the first signal to noise ratio of the first sound signal and the second signal to noise ratio of the second sound signal are calculated, in order to reduce the signal to noise ratio of the sound signal output or obtained by the electronic equipment, the sound receiving component with larger signal to noise ratio of the sound signal in the two sound receiving components is selected as the main sound receiving component, the sound receiving component with smaller signal to noise ratio of the sound signal is selected as the environment sound receiving component, noise reduction processing is carried out on the sound signal of the main sound receiving component according to the sound signal of the environment sound receiving component, noise in the sound signal of the main sound receiving component is eliminated, the target sound signal is obtained, and the signal to noise ratio of the target sound signal is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a first flowchart of a noise reduction method of an electronic device according to an embodiment of the present application.
Fig. 2 is an application scenario schematic diagram of a noise reduction method of an electronic device according to an embodiment of the present application.
Fig. 3 is a second flowchart of a noise reduction method of an electronic device according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a noise reduction device of an electronic device according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 6 is a schematic diagram of a second structure of an electronic device according to 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. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The embodiment of the application provides a noise reduction method of an electronic device, and an execution subject of the noise reduction method of the electronic device may be a noise reduction device of the electronic device provided in the embodiment of the application, or an electronic device integrated with the noise reduction device of the electronic device, where the noise reduction device of the electronic device may be implemented in a hardware or software manner. The electronic device may be a smart phone, a tablet computer, a palm computer, a notebook computer, a desktop computer, or other devices, or may be an intelligent wearing device such as an intelligent glasses, an intelligent helmet, an intelligent bracelet, or the like.
Referring to fig. 1, fig. 1 is a schematic flow chart of a noise reduction method of an electronic device according to an embodiment of the present application. The specific flow of the noise reduction method of the electronic device provided by the embodiment of the application may be as follows:
at 101, a first sound signal detected by a first sound pickup assembly and a second sound signal detected by a second sound pickup assembly are acquired.
The method for reducing noise of the electronic device in the embodiment of the application can be applied to any one of the electronic devices. The electronic equipment is provided with a first sound receiving component and a second sound receiving component, wherein one sound receiving component comprises at least one microphone.
For example, in one embodiment, the electronic device is a smart phone, and the smart phone includes a first sound receiving component and a second sound receiving component, where the first sound receiving component and the second sound receiving component can detect sound signals in different directions.
For another example, in another embodiment, the electronic device is a smart glasses. Referring to fig. 2, fig. 2 is a schematic diagram of an application scenario of a noise reduction method of an electronic device according to an embodiment of the present application. The intelligent glasses comprise a glasses main body, a first glasses frame and a second glasses frame, wherein the first glasses frame and the second glasses frame are respectively arranged on two sides of the glasses main body, a first radio component is arranged on the first glasses frame, and a second radio component is arranged on the second glasses frame. The first sound receiving assembly and the second sound receiving assembly are symmetrically distributed in space. In one embodiment, a sound receiving assembly includes only one microphone. Alternatively, as another embodiment, a sound receiving component may include two or more microphones, where signals detected by the two or more microphones may be processed according to a beamforming algorithm, and noise reduction processing is performed on human voice and environmental sound, so as to obtain an audio signal, and the audio signal is used as the first sound signal detected by the sound receiving component.
In 102, a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal are calculated.
Because the position of the noise source is not fixed when the electronic equipment such as the intelligent glasses is in actual use, the positions of the first radio receiving component and the second radio receiving component are different, and the distances between the noise source and the two radio receiving components are different. Therefore, the degree of influence of noise is also different in the detectable sound signal. Based on the above, when two sound receiving components are used, the signal to noise ratios of the sound signals detected by the two sound receiving components can be calculated respectively, so that which sound receiving component is closer to the noise source can be judged according to the signal to noise ratio of the sound signals, and the influence of the sound signals is reduced in the subsequent processing process of the sound signals.
After the first sound signal of the first sound receiving component and the second sound signal of the second sound receiving component are obtained, the signal to noise ratios of the two sound signals are calculated respectively. The signal-to-noise ratio of the sound signal refers to the ratio of the sound source signal to the noise signal in the sound signal. The sound source signal herein refers to an effective sound signal that the user wishes to acquire, for example, a voice signal that the user emits when controlling the smart glasses through a voice command. The sound signal herein refers to an original signal detected by the microphone, including a sound source signal and a noise signal.
Based on this, in an embodiment, calculating a first signal-to-noise ratio of the first sound signal comprises:
determining a third sound signal segment from the first sound signal, and acquiring a third amplitude of the third sound signal segment, wherein the third sound signal segment does not contain human voice;
determining a fourth sound signal section from the first sound signal, and acquiring a fourth amplitude value of the fourth sound signal section, wherein the fourth sound signal section comprises a sound source signal and a noise signal;
a first signal-to-noise ratio of the first sound signal is calculated based on the third amplitude and the fourth amplitude.
In this embodiment, a third sound signal segment and a fourth sound signal segment are determined from the initial sound signal detected by the first sound receiving component, that is, the first sound signal, where only the noise signal is in the third sound signal segment, and the fourth sound signal segment includes the sound source signal and the noise signal. Then, a third amplitude value of the third sound signal segment is obtained, a fourth amplitude value of the fourth sound signal segment is obtained, and the signal-to-noise ratio of the first sound signal is obtained through calculation. For example, the fourth amplitude value is subtracted from the third amplitude value to obtain the amplitude value of the sound source signal, and the amplitude value of the sound source signal is divided by the third amplitude value to obtain the signal-to-noise ratio of the first sound signal.
For the second sound signal, a second signal-to-noise ratio of the second sound signal may be calculated in the same way as for the first sound signal.
At 103, a primary sound pickup assembly and an ambient sound pickup assembly are determined based on the first signal to noise ratio and the second signal to noise ratio, wherein the signal to noise ratio of the sound signal of the primary sound pickup assembly is greater than the signal to noise ratio of the sound signal of the ambient sound pickup assembly.
In 104, the sound signal of the main sound receiving component is noise-reduced according to the sound signal of the environment sound receiving component, so as to obtain a target sound signal.
Since the noise source may be located at a different distance from the two radio components, in such cases the calculated first and second signal to noise ratios are typically different. At this time, the sound receiving assembly with larger signal to noise ratio can be used as the main sound receiving assembly, the sound receiving assembly with smaller signal to noise ratio can be used as the environment sound receiving assembly, and the sound signal of the environment sound receiving assembly is used for noise reduction treatment of the sound signal of the main sound receiving assembly.
Still taking the scenario of fig. 2 as an example, assuming that the position of the noise source is on the left side of the wearer of the wearable device, the noise signal in the second sound signal will be much smaller than the noise signal in the first sound signal, assuming that the calculated first signal-to-noise ratio is smaller than the second signal-to-noise ratio. The first sound receiving component can be used as an environmental sound receiving component and the second sound receiving component can be used as a main sound receiving component. And denoising the second sound signal by using the first sound signal to obtain a target sound signal.
In one embodiment, before determining the main radio receiving component and the environment radio receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio, the method further includes: comparing the first signal-to-noise ratio with a first preset threshold value, and comparing the second signal-to-noise ratio with the first preset threshold value; and when the first signal-to-noise ratio is smaller than a first preset threshold value or the second signal-to-noise ratio is smaller than the first preset threshold value, determining the main sound receiving component and the environment sound receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio.
In this embodiment, a first preset threshold is obtained, the magnitude of the first signal-to-noise ratio is compared with the magnitude of the first preset threshold, and the magnitude of the second signal-to-noise ratio is compared with the magnitude of the first preset threshold. The first preset threshold is a preset value, and may be an empirical value, for example, in some embodiments, the first preset threshold may be equal to 0db. For another example, in other embodiments, the first preset threshold may also be equal to 0.2db, 0.3db, etc.
When the signal-to-noise ratio of the sound signals is smaller than the first preset threshold value, the noise of the sound signals is judged to be too large, the sound source signals are greatly influenced, and noise reduction is difficult to be carried out on the two sound signals in a beam forming mode.
Therefore, when the first signal-to-noise ratio is detected to be smaller than the first preset threshold value or the second signal-to-noise ratio is detected to be smaller than the first preset threshold value, the sound receiving component corresponding to the sound signal with the larger signal-to-noise ratio in the first sound signal and the second sound signal is taken as the main sound receiving component. And obtaining a target sound signal based on the sound signal of the main sound receiving component. The target sound signal is a sound signal obtained by processing original signals detected by the two sound receiving components and used for outputting or transmitting. For example, in a scenario where a user talks through a wearable device, the target sound signal is a sound signal that needs to be transmitted to the opposite end of the talker. For another example, in a recorded scene, the target sound signal is a signal stored to the device.
When the first signal-to-noise ratio and the second signal-to-noise ratio are detected to be larger than a first preset threshold value, the first sound signal and the second sound signal are processed according to a beam forming algorithm, and a target sound signal is obtained.
In particular, the present application is not limited by the order of execution of the steps described, and certain steps may be performed in other orders or concurrently without conflict.
As can be seen from the foregoing, in the noise reduction method of the electronic device provided by the embodiment of the present application, the first sound signal detected by the first sound receiving component is obtained, the second sound signal detected by the second sound receiving component is calculated, the first signal to noise ratio of the first sound signal and the second signal to noise ratio of the second sound signal are calculated, in order to reduce the signal to noise ratio of the sound signal output or obtained by the electronic device, the sound receiving component with the larger signal to noise ratio of the sound signal in the two sound receiving components is selected as the main sound receiving component, the sound receiving component with the smaller signal to noise ratio of the sound signal is selected as the environment sound receiving component, the sound signal of the main sound receiving component is subjected to noise reduction processing according to the sound signal of the environment sound receiving component, the noise in the sound signal of the main sound receiving component is eliminated, the target sound signal is obtained, and the signal to noise ratio of the target sound signal is improved.
In some embodiments, according to a sound signal of an environmental sound receiving component, performing noise reduction processing on the sound signal of the sound receiving component to obtain a target sound signal, including:
obtaining a target attenuation proportion;
according to the target attenuation proportion, carrying out attenuation treatment on sound signals of the environment radio assembly;
and subtracting the sound signal of the environment sound receiving assembly after the attenuation treatment from the sound signal of the main sound receiving assembly to obtain a target sound signal.
In this embodiment, because the noise in the sound signal detected by the main sound receiving component is smaller than the noise in the sound signal detected by the environment sound receiving component, before the sound signal of the environment sound receiving component is used to reduce the noise of the main sound receiving component, the target attenuation ratio is acquired, the sound signal of the environment sound receiving component is attenuated by using the target attenuation ratio, and then the sound signal of the environment sound receiving component after the attenuation processing is subtracted by using the sound signal of the main sound receiving component, so as to obtain the target sound signal. Wherein the target decay rate may be an empirical value.
The method described in the previous examples is described in further detail below by way of example.
Referring to fig. 3, fig. 3 is a second flow chart of a noise reduction method of an electronic device according to an embodiment of the invention. The method comprises the following steps:
in 201, a first sound signal detected by a first sound pickup assembly and a second sound signal detected by a second sound pickup assembly are acquired.
In this embodiment, each sound pickup assembly includes at least two microphones, and the initial sound signals detected by the at least two microphones are processed according to a beam forming algorithm, and the processed sound signals are used as the sound signals detected by the sound pickup assembly. Wherein each sound pickup assembly comprises at least two microphones arranged in a specific array on one spectacle frame, e.g. at least two microphones arranged linearly on one spectacle frame. The first sound receiving assembly and the second sound receiving assembly are symmetrically distributed on the spectacle frames on the left side and the right side by taking the central shaft of the glasses to be worn as a symmetry axis.
Based on the above mode, the first sound signal detected by the first sound receiving component and the second sound signal detected by the second sound receiving component are obtained.
In 202, a first signal-to-noise ratio of a first sound signal and a second signal-to-noise ratio of a second sound signal are calculated.
In 203, the first snr is compared to a first predetermined threshold, and the second snr is compared to the first predetermined threshold.
Executing 204 when the first signal-to-noise ratio is less than the first preset threshold or the second signal-to-noise ratio is less than the first preset threshold; when the first signal-to-noise ratio is not less than the first preset threshold and the second signal-to-noise ratio is not less than the first preset threshold, 210 is performed.
In 204, a primary sound pickup assembly and an ambient sound pickup assembly are determined based on the first signal to noise ratio and the second signal to noise ratio, wherein the signal to noise ratio of the sound signal of the primary sound pickup assembly is greater than the signal to noise ratio of the sound signal of the ambient sound pickup assembly.
After the first sound signal of the first sound receiving component and the second sound signal of the second sound receiving component are obtained, the signal to noise ratios of the two sound signals are calculated respectively.
When the signal-to-noise ratio of the sound signal is smaller than a first preset threshold, the noise of the sound signal is judged to be too large, the sound source signal is greatly influenced, the human voice and the noise cannot be well separated, and noise of the two sound signals is reduced in a mode that beam forming is difficult.
Therefore, when the first signal-to-noise ratio is detected to be smaller than the first preset threshold value or the second signal-to-noise ratio is detected to be smaller than the first preset threshold value, the sound receiving component corresponding to the sound signal with the larger signal-to-noise ratio in the first sound signal and the second sound signal is taken as the main sound receiving component. The sound receiving component with small signal-to-noise ratio is used as an environment sound receiving component, and the sound signal of the environment sound receiving component is used for carrying out noise reduction treatment on the sound signal of the main sound receiving component.
At 205, a first sound signal segment is determined from the sound signal of the main sound pickup assembly and a first amplitude of the first sound signal segment is obtained.
At 206, a second sound signal segment is determined from the sound signal of the ambient sound reception assembly and a second amplitude value of the second sound signal segment is obtained.
In 207, a target attenuation ratio is obtained from the ratio of the first amplitude to the second amplitude.
The noise in the sound signal detected by the main sound receiving component is smaller than the noise in the sound signal detected by the environment sound receiving component, before the sound signal of the environment sound receiving component is used for reducing the noise of the main sound receiving component, the target attenuation proportion is acquired, the sound signal of the environment sound receiving component is attenuated by using the target attenuation proportion, and then the sound signal of the environment sound receiving component after the attenuation processing is subtracted by using the sound signal of the main sound receiving component, so that the target sound signal is obtained.
Since the size of the noise signal varies, the position of the noise source also varies, and thus denoising is performed more accurately. The target attenuation ratio may be calculated from the two sound signals in real time. The method comprises the steps of determining a first sound signal section from sound signals of a main sound receiving assembly, and obtaining a first amplitude value of the first sound signal section; a second sound signal segment is determined from the sound signal of the ambient sound reception assembly and a second amplitude of the second sound signal segment is obtained. And calculating the ratio of the first amplitude value to the second amplitude value to obtain the target attenuation ratio.
Wherein the electronic device processes the sound signal periodically according to 201 to 210. In some embodiments, in order to reduce the calculation error of the target attenuation ratio, after calculating the ratio of the first amplitude to the second amplitude, if the difference between the ratio and the preset attenuation ratio is greater than the second preset threshold, the ratio in a plurality of continuous historical detection periods is obtained, and an average value of the plurality of ratios is calculated, and the average value is taken as the target attenuation ratio, so that the detection error is eliminated.
At 208, the sound signal of the environmental sound reception assembly is attenuated according to the target attenuation ratio.
In 209, the sound signal of the main sound receiving component is subtracted from the sound signal of the environment sound receiving component after the attenuation processing to obtain a target sound signal.
After the target attenuation proportion is calculated, the target attenuation proportion is used for carrying out attenuation processing on the sound signals of the environment sound receiving assembly, and then the sound signals of the environment sound receiving assembly after the attenuation processing are subtracted by the sound signals of the main sound receiving assembly, so that the target sound signals are obtained.
At 210, the first sound signal and the second sound signal are processed according to a beamforming algorithm to obtain a target sound signal.
If the first signal-to-noise ratio and the second signal-to-noise ratio are not smaller than the first preset threshold, human voice and noise can be well separated from the first signal-to-noise ratio and the second signal-to-noise ratio, and at the moment, in order to have a better noise reduction effect, the first sound signal and the second sound signal can be processed according to a beam forming algorithm to obtain a target sound signal.
As can be seen from the above, in the noise reduction method of the electronic device according to the embodiment of the present invention, in the process of processing the sound signals of the plurality of sound receiving components to obtain the target sound signal, the sound receiving component with a larger signal-to-noise ratio is used as the main sound receiving component, the sound receiving component with a smaller signal-to-noise ratio is used as the environment sound receiving component, and the sound signal of the environment sound receiving component is used to perform noise reduction processing on the sound signal of the main sound receiving component.
In addition, in the noise reduction processing process, the attenuation proportion can be obtained according to the amplitude ratio of the noise signal of the main sound receiving component to the noise signal of the environment sound receiving component. Because the noise in the sound signal detected by the main sound receiving component is smaller than the noise in the sound signal detected by the environment sound receiving component, the noise signal in the environment sound receiving component is attenuated and then the sound signal of the main sound receiving component is subjected to noise reduction treatment, so that a target sound signal with better noise reduction effect can be obtained.
In one embodiment, a noise reduction device of an electronic device is also provided. Referring to fig. 4, fig. 4 is a schematic structural diagram of a noise reduction device 300 of an electronic device according to an embodiment of the present application. The noise reduction device 300 of the electronic device includes a signal acquisition module 301, a signal-to-noise ratio calculation module 302, a component selection module 303, and a signal processing module 304, as follows:
the signal acquisition module 301 is configured to acquire a first sound signal detected by the first sound receiving component and a second sound signal detected by the second sound receiving component;
a signal-to-noise ratio calculation module 302, configured to calculate a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
The component selection module 303 is configured to determine a main sound receiving component and an environment sound receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio, where the signal-to-noise ratio of the sound signal of the main sound receiving component is greater than the signal-to-noise ratio of the sound signal of the environment sound receiving component;
the signal processing module 304 is configured to perform noise reduction processing on the sound signal of the main sound receiving component according to the sound signal of the environmental sound receiving component, so as to obtain a target sound signal.
In some embodiments, the noise reduction device 300 of the electronic device further includes a data comparison module for: comparing the first signal-to-noise ratio with a first preset threshold value, and comparing the second signal-to-noise ratio with the first preset threshold value;
the component selection module 303 is further configured to: and when the first signal-to-noise ratio is smaller than a first preset threshold or the second signal-to-noise ratio is smaller than the first preset threshold, determining a main sound receiving assembly and an environment sound receiving assembly according to the first signal-to-noise ratio and the second signal-to-noise ratio.
In some embodiments, the signal processing module 304 is further to: and when the first signal-to-noise ratio is not smaller than the first preset threshold value and the second signal-to-noise ratio is not smaller than the first preset threshold value, processing the first sound signal and the second sound signal according to a beam forming algorithm to obtain a target sound signal.
In some embodiments, the signal processing module 304 is further to: obtaining a target attenuation proportion;
according to the target attenuation proportion, carrying out attenuation treatment on the sound signals of the environment radio assembly;
and subtracting the sound signal of the environment sound receiving assembly after the attenuation treatment from the sound signal of the main sound receiving assembly to obtain a target sound signal.
In some embodiments, the signal processing module 304 is further to: determining a first sound signal segment from the sound signal of the main sound receiving component, and acquiring a first amplitude value of the first sound signal segment;
determining a second sound signal section from sound signals of the environment sound receiving assembly, and acquiring a second amplitude of the second sound signal section, wherein signals in the first sound signal section and the second sound signal section are noise signals;
and obtaining a target attenuation proportion according to the ratio of the first amplitude to the second amplitude.
In some embodiments, the signal processing module 304 is further to: calculating the ratio of the first amplitude value to the second amplitude value;
and when the difference value between the ratio and the preset attenuation ratio is larger than a second preset threshold value, acquiring the ratio in a plurality of continuous historical detection periods, calculating the average value of the plurality of ratios, and taking the average value as a target attenuation ratio.
In some embodiments, the signal processing module 304 is further to: and acquiring a preset attenuation proportion as a target attenuation proportion.
In some embodiments, the signal-to-noise ratio calculation module 302 is further configured to: determining a third sound signal segment from the first sound signal, and acquiring a third amplitude value of the third sound signal segment, wherein a signal in the third sound signal segment is a noise signal;
determining a fourth sound signal segment from the first sound signal, and acquiring a fourth amplitude value of the fourth sound signal segment, wherein the fourth sound signal segment comprises a sound source signal and a noise signal;
and calculating a first signal-to-noise ratio of the first sound signal according to the third amplitude value and the fourth amplitude value.
In some embodiments, the signal acquisition module 301 is further configured to: acquiring a plurality of sound signals detected by the plurality of microphones;
and processing the plurality of sound signals according to a beam forming algorithm to obtain a first sound signal corresponding to the first sound receiving assembly.
It should be noted that, the noise reduction device of the electronic device provided in the embodiment of the present application and the noise reduction method of the electronic device in the foregoing embodiment belong to the same concept, and any method provided in the noise reduction method embodiment of the electronic device may be implemented by using the noise reduction device of the electronic device, and a detailed implementation process of the method is shown in the noise reduction method embodiment of the electronic device, which is not described herein again.
As can be seen from the above, the noise reduction device 300 of the electronic device provided in the embodiment of the present application includes a signal acquisition module 301, a signal-to-noise ratio calculation module 302, a component selection module 303, and a signal processing module 304, where the signal acquisition module 301 acquires a first sound signal detected by a first sound receiving component, a second sound signal detected by a second sound receiving component, the signal-to-noise ratio calculation module 302 calculates a first signal-to-noise ratio of the first sound signal, and a second signal-to-noise ratio of the second sound signal, in order to reduce the signal-to-noise ratio of the sound signal output or obtained by the electronic device, the component selection module 303 selects a sound receiving component with a larger signal-to-noise ratio of the sound signal in the two sound receiving components as a main sound receiving component, and uses the sound receiving component with a smaller signal-to-noise ratio of the sound signal as an environmental sound receiving component, and the signal processing module 304 performs noise reduction processing on the sound signal of the main sound receiving component according to the sound signal of the environmental sound receiving component, thereby eliminating noise in the sound signal of the main sound receiving component, and obtaining a target sound signal, and improving the signal.
The embodiment of the application also provides electronic equipment. The electronic equipment can be a smart phone, a tablet personal computer and other equipment. Referring to fig. 5, fig. 5 is a schematic diagram of a first structure of an electronic device according to an embodiment of the present application. The electronic device 400 comprises a processor 401 and a memory 402. The processor 401 is electrically connected to the memory 402. The electronic device 400 further includes a first sound receiving component 411 and a second sound receiving component 412, where the first sound receiving component 411 and the second sound receiving component 412 are electrically connected to the processor 401 and the memory 402.
The processor 401 is a control center of the electronic device 400, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or calling computer programs stored in the memory 402, and calling data stored in the memory 402, thereby performing overall monitoring of the electronic device.
Memory 402 may be used to store computer programs and data. The memory 402 stores a computer program having instructions executable in a processor. The computer program may constitute various functional modules. The processor 401 executes various functional applications and data processing by calling a computer program stored in the memory 402.
In this embodiment, the processor 401 in the electronic device 400 loads the instructions corresponding to the processes of one or more computer programs into the memory 402 according to the following steps, and the processor 401 executes the computer programs stored in the memory 402, so as to implement various functions:
acquiring a first sound signal detected by a first sound receiving component and a second sound signal detected by a second sound receiving component;
calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
Determining a main sound receiving assembly and an environment sound receiving assembly according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving assembly is larger than that of the sound signal of the environment sound receiving assembly;
and carrying out noise reduction processing on the sound signal of the main sound receiving assembly according to the sound signal of the environment sound receiving assembly to obtain a target sound signal.
In some embodiments, referring to fig. 6, fig. 6 is a schematic diagram of a second structure of an electronic device according to an embodiment of the present application. The electronic device 400 further comprises: radio frequency circuit 403, display 404, control circuit 405, input unit 406, audio circuit 407, sensor 408, and power supply 409. The processor 401 is electrically connected to the radio frequency circuit 403, the display 404, the control circuit 405, the input unit 406, the audio circuit 407, the sensor 408, and the power supply 409, respectively.
The radio frequency circuit 403 is used to transmit and receive radio frequency signals to communicate with a network device or other electronic device through wireless communication.
The display 404 may be used to display information entered by a user or provided to a user as well as various graphical user interfaces of the electronic device, which may be composed of images, text, icons, video, and any combination thereof.
The control circuit 405 is electrically connected to the display screen 404, and is used for controlling the display screen 404 to display information.
The input unit 406 may be used to receive entered numbers, character information, or user characteristic information (e.g., fingerprints), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control. The input unit 406 may include a fingerprint recognition module.
The audio circuit 407 may provide an audio interface between the user and the electronic device through a speaker, microphone. Wherein the audio circuit 407 comprises a microphone. The microphone is electrically connected to the processor 401. The microphone is used for receiving voice information input by a user.
The sensor 408 is used to collect external environmental information. The sensor 408 may include one or more of an ambient brightness sensor, an acceleration sensor, a gyroscope, and the like.
The power supply 409 is used to power the various components of the electronic device 400. In some embodiments, power supply 409 may be logically connected to processor 401 through a power management system, thereby performing functions such as managing charging, discharging, and power consumption through the power management system.
Although not shown in the drawings, the electronic device 400 may further include a camera, a bluetooth module, etc., which will not be described herein.
In this embodiment, the processor 401 in the electronic device 400 loads the instructions corresponding to the processes of one or more computer programs into the memory 402 according to the following steps, and the processor 401 executes the computer programs stored in the memory 402, so as to implement various functions:
acquiring a first sound signal detected by a first sound receiving component and a second sound signal detected by a second sound receiving component;
calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
determining a main sound receiving assembly and an environment sound receiving assembly according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving assembly is larger than that of the sound signal of the environment sound receiving assembly;
and carrying out noise reduction processing on the sound signal of the main sound receiving assembly according to the sound signal of the environment sound receiving assembly to obtain a target sound signal.
In some embodiments, the processor 401 performs:
comparing the first signal-to-noise ratio with a first preset threshold value, and comparing the second signal-to-noise ratio with the first preset threshold value;
and when the first signal-to-noise ratio is smaller than a first preset threshold value or the second signal-to-noise ratio is smaller than the first preset threshold value, determining a main sound receiving component and an environment sound receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio.
In some embodiments, the processor 401 performs: and when the first signal-to-noise ratio is not smaller than the first preset threshold value and the second signal-to-noise ratio is not smaller than the first preset threshold value, processing the first sound signal and the second sound signal according to a beam forming algorithm to obtain a target sound signal.
In some embodiments, the processor 401 performs: obtaining a target attenuation proportion;
according to the target attenuation proportion, carrying out attenuation treatment on the sound signals of the environment radio assembly;
and subtracting the sound signal of the environment sound receiving assembly after the attenuation treatment from the sound signal of the main sound receiving assembly to obtain a target sound signal.
In some embodiments, the processor 401 performs: determining a first sound signal segment from the sound signal of the main sound receiving component, and acquiring a first amplitude value of the first sound signal segment;
determining a second sound signal section from sound signals of the environment sound receiving assembly, and acquiring a second amplitude of the second sound signal section, wherein signals in the first sound signal section and the second sound signal section are noise signals;
and obtaining a target attenuation proportion according to the ratio of the first amplitude to the second amplitude.
In some embodiments, the processor 401 performs: calculating the ratio of the first amplitude value to the second amplitude value;
and when the difference value between the ratio and the preset attenuation ratio is larger than a second preset threshold value, acquiring the ratio in a plurality of continuous historical detection periods, calculating the average value of the plurality of ratios, and taking the average value as a target attenuation ratio.
In some embodiments, the processor 401 performs: and acquiring a preset attenuation proportion as a target attenuation proportion.
In some embodiments, the processor 401 performs: determining a third sound signal segment from the first sound signal, and acquiring a third amplitude value of the third sound signal segment, wherein a signal in the third sound signal segment is a noise signal;
determining a fourth sound signal segment from the first sound signal, and acquiring a fourth amplitude value of the fourth sound signal segment, wherein the fourth sound signal segment comprises a sound source signal and a noise signal;
and calculating a first signal-to-noise ratio of the first sound signal according to the third amplitude value and the fourth amplitude value.
In some embodiments, the first sound pickup assembly includes a plurality of microphones; the processor 401 performs: acquiring a plurality of sound signals detected by the plurality of microphones;
And processing the plurality of sound signals according to a beam forming algorithm to obtain a first sound signal corresponding to the first sound receiving assembly.
From the above, the embodiment of the application provides an electronic device, the electronic device obtains a first sound signal detected by a first sound receiving component, a second sound signal detected by a second sound receiving component, calculates a first signal to noise ratio of the first sound signal, and a second signal to noise ratio of the second sound signal, in order to reduce the signal to noise ratio of the sound signal output or obtained by the electronic device, selects a sound receiving component with a larger signal to noise ratio of the sound signal in the two sound receiving components as a main sound receiving component, uses a sound receiving component with a smaller signal to noise ratio of the sound signal as an environment sound receiving component, performs noise reduction processing on the sound signal of the main sound receiving component according to the sound signal of the environment sound receiving component, eliminates noise in the sound signal of the main sound receiving component, and obtains a target sound signal, thereby improving the signal to noise ratio of the target sound signal.
The embodiment of the application further provides a storage medium, in which a computer program is stored, and when the computer program runs on a computer, the computer executes the noise reduction method of the electronic device according to any one of the embodiments.
It should be noted that, those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a computer program to instruct related hardware, and the computer program may be stored in a computer readable storage medium, where the storage medium may include, but is not limited to: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.
Furthermore, the terms "first," "second," and "third," and the like, herein, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to the particular steps or modules listed and certain embodiments may include additional steps or modules not listed or inherent to such process, method, article, or apparatus.
The method and device for reducing noise of the electronic device, the storage medium and the electronic device provided by the embodiment of the application are described in detail. The principles and embodiments of the present application are described herein with specific examples, the above examples being provided only to assist in understanding the methods of the present application and their core ideas; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (9)
1. A method of noise reduction for an electronic device, the method comprising:
acquiring a first sound signal detected by a first sound receiving component and a second sound signal detected by a second sound receiving component, wherein the first sound receiving component and the second sound receiving component are symmetrically distributed on spectacle frames on the left side and the right side by taking a central axis of a pair of spectacles to be worn as a symmetry axis, processing initial sound signals detected by the first sound receiving component, processing the processed sound signals as the first sound signals detected by the first sound receiving component, processing the initial sound signals detected by the second sound receiving component, and processing the processed sound signals as the second sound signals detected by the second sound receiving component;
calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
determining a main sound receiving assembly and an environment sound receiving assembly according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving assembly is larger than that of the sound signal of the environment sound receiving assembly;
when the first signal-to-noise ratio is smaller than a first preset threshold or the second signal-to-noise ratio is smaller than the first preset threshold, noise reduction processing is carried out on the sound signal of the main sound receiving component according to the sound signal of the environment sound receiving component, so that a target sound signal is obtained; or when the first signal-to-noise ratio is not smaller than the first preset threshold value and the second signal-to-noise ratio is not smaller than the first preset threshold value, processing the first sound signal and the second sound signal according to a beam forming algorithm to obtain a target sound signal.
2. The method for noise reduction of an electronic device according to claim 1, wherein the noise reduction processing of the sound signal of the sound receiving component according to the sound signal of the environmental sound receiving component to obtain a target sound signal comprises:
obtaining a target attenuation proportion;
according to the target attenuation proportion, carrying out attenuation treatment on the sound signals of the environment radio assembly;
and subtracting the sound signal of the environment sound receiving assembly after the attenuation treatment from the sound signal of the main sound receiving assembly to obtain a target sound signal.
3. The method for noise reduction of an electronic device according to claim 2, wherein the obtaining the target attenuation ratio includes:
determining a first sound signal segment from the sound signal of the main sound receiving component, and acquiring a first amplitude value of the first sound signal segment;
determining a second sound signal section from sound signals of the environment sound receiving assembly, and acquiring a second amplitude of the second sound signal section, wherein signals in the first sound signal section and the second sound signal section are noise signals;
and obtaining a target attenuation proportion according to the ratio of the first amplitude to the second amplitude.
4. The method for noise reduction of an electronic device according to claim 3, wherein said obtaining a target attenuation ratio according to a ratio of said first amplitude to said second amplitude comprises:
calculating the ratio of the first amplitude value to the second amplitude value;
and when the difference value between the ratio and the preset attenuation ratio is larger than a second preset threshold value, acquiring the ratio in a plurality of continuous historical detection periods, calculating the average value of the plurality of ratios, and taking the average value as a target attenuation ratio.
5. The method for noise reduction of an electronic device according to claim 2, wherein the obtaining the target attenuation ratio includes:
and acquiring a preset attenuation proportion as a target attenuation proportion.
6. The method of noise reduction of an electronic device of claim 1, wherein said calculating a first signal-to-noise ratio of the first sound signal comprises:
determining a third sound signal segment from the first sound signal, and acquiring a third amplitude value of the third sound signal segment, wherein a signal in the third sound signal segment is a noise signal;
determining a fourth sound signal segment from the first sound signal, and acquiring a fourth amplitude value of the fourth sound signal segment, wherein the fourth sound signal segment comprises a sound source signal and a noise signal;
And calculating a first signal-to-noise ratio of the first sound signal according to the third amplitude value and the fourth amplitude value.
7. A noise reduction device for an electronic apparatus, the device comprising:
the signal acquisition module is used for acquiring a first sound signal detected by the first sound receiving component and a second sound signal detected by the second sound receiving component, wherein the first sound receiving component and the second sound receiving component are symmetrically distributed on spectacle frames on the left side and the right side by taking a central axis of a pair of spectacles to be worn as a symmetry axis, processing the initial sound signal detected by the first sound receiving component, processing the initial sound signal detected by the second sound receiving component, and processing the processed sound signal as the second sound signal detected by the second sound receiving component;
the signal-to-noise ratio calculation module is used for calculating a first signal-to-noise ratio of the first sound signal and a second signal-to-noise ratio of the second sound signal;
the component selection module is used for determining a main sound receiving component and an environment sound receiving component according to the first signal-to-noise ratio and the second signal-to-noise ratio, wherein the signal-to-noise ratio of the sound signal of the main sound receiving component is larger than that of the sound signal of the environment sound receiving component;
The signal processing module is used for carrying out noise reduction processing on the sound signal of the main sound receiving component according to the sound signal of the environment sound receiving component when the first signal-to-noise ratio is smaller than a first preset threshold value or the second signal-to-noise ratio is smaller than the first preset threshold value to obtain a target sound signal; or when the first signal-to-noise ratio is not smaller than the first preset threshold value and the second signal-to-noise ratio is not smaller than the first preset threshold value, processing the first sound signal and the second sound signal according to a beam forming algorithm to obtain a target sound signal.
8. A storage medium having stored thereon a computer program which, when run on a computer, causes the computer to perform the method of noise reduction of an electronic device as claimed in any one of claims 1 to 6.
9. An electronic device comprising a processor and a memory, the memory storing a computer program, characterized in that the processor is adapted to perform the method of noise reduction of an electronic device according to any of claims 1 to 6 by invoking the computer program.
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| CN202010791409.5A CN111933167B (en) | 2020-08-07 | 2020-08-07 | Noise reduction method and device of electronic equipment, storage medium and electronic equipment |
| PCT/CN2021/098664 WO2022028083A1 (en) | 2020-08-07 | 2021-06-07 | Noise reduction method and apparatus for electronic device, storage medium and electronic device |
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| CN113709288A (en) * | 2021-08-16 | 2021-11-26 | Oppo广东移动通信有限公司 | Noise reduction method and device, electronic equipment and computer readable storage medium |
| CN115811574B (en) * | 2023-02-03 | 2023-06-16 | 合肥炬芯智能科技有限公司 | Sound signal processing method and device, main equipment and split conference system |
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