CN107396238A - Sound signal processing method, device, mobile terminal and readable storage medium - Google Patents

Abstract

The embodiment of the invention discloses a sound signal processing method, which is applied to the technical field of mobile terminals and comprises the following steps: detecting the amplitude of the sound signal acquired by the first sound acquisition device, judging whether the amplitude exceeds a preset value or not, if so, switching the second sound acquisition device to an analog input channel, acquiring the sound signal by the second sound acquisition device, processing the sound signal acquired by the second sound acquisition device, and outputting the processed sound signal, wherein the signal sensitivity of the second sound acquisition device is lower than that of the first sound acquisition device. The embodiment of the invention also discloses a sound signal processing device, a mobile terminal and a computer readable storage medium, which can improve the sound signal acquisition quality.

Description

Sound signal processing method, device, mobile terminal and readable storage medium

technical field

The invention belongs to the technical field of mobile terminals, and in particular relates to a sound signal processing method and device, a mobile terminal and a readable storage medium.

Background technique

In the daily environment, there are often large signals that cause the MIC (MICPHONE) of the mobile phone to be close to saturation or saturated, and the collected voice signals cannot be processed normally, resulting in large distortion and poor signal quality of the input signal to the processor.

In the prior art, the above problems are solved by reducing the front-end gain of the MIC, but in a large-signal environment, the MIC itself is prone to saturation, which affects the normal signal processing capability, and reducing the front-end gain cannot solve the problem of output distortion of the MIC itself.

Contents of the invention

The invention provides a sound signal processing method, device, mobile terminal and readable storage medium, which are used to improve the quality of signal collection by changing the sound signal collection device, thereby improving the quality of communication.

The first aspect of the embodiment of the present invention provides a sound signal processing method, including:

Detecting whether the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value;

If so, switch the second sound collection device to an analog input channel, and obtain a sound signal through the second sound collection device, the signal sensitivity of the second sound collection device is lower than that of the first sound collection device;

The sound signal acquired by the second sound collection device is processed, and the processed sound signal is output.

The second aspect of the embodiment of the present invention provides an audio signal processing device, including:

A detection module, configured to detect whether the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value;

The control module is configured to switch the second sound collection device to an analog input channel if yes, and obtain a sound signal through the second sound collection device, and the signal sensitivity of the second sound collection device is lower than that of the first sound collection device;

A processing module, configured to process the sound signal acquired by the second sound collection device, and output the processed sound signal.

The third aspect of the embodiment of the present invention provides a mobile terminal, including:

A memory, a processor, and a computer program stored in the memory and operable on the processor, wherein the processor implements the sound signal processing method provided in the first aspect of the embodiment of the present invention when executing the program.

The fourth aspect of the embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the sound signal processing method provided by the first aspect of the embodiment of the present invention is implemented.

It can be seen from the above-mentioned embodiments of the present invention that the sound signal processing method, device, mobile terminal and readable storage medium provided by the present invention have lower switching sensitivity when the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value The second sound collection device is connected to the analog input channel, and the sound signal with a large signal amplitude is collected by the second sound collection device, which can avoid the collection and processing of the sound signal being affected by the sound collection device approaching saturation or saturation, and the quality cannot be obtained. A good sound signal can improve the collection quality of the sound signal, thereby improving the call quality.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only are some embodiments of the present invention.

Fig. 1 is a schematic flow chart of the sound signal processing method provided by the first embodiment of the present invention;

Fig. 2 is a schematic flow chart of the sound signal processing method provided by the second embodiment of the present invention;

Fig. 3 is the structural representation of each device in the second embodiment of the present invention;

Fig. 4 is a schematic flowchart of a sound signal processing method provided by a third embodiment of the present invention;

Fig. 5 is the structural representation of each device in the third embodiment of the present invention;

Fig. 6 is another structural schematic view of each device in the second embodiment and the third embodiment of the present invention;

Fig. 7 is a schematic structural diagram of an audio signal processing device provided by the fourth embodiment and the fifth embodiment of the present invention;

Fig. 8 shows a hardware structure diagram of a mobile terminal.

detailed description

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

The sound signal processing method provided by the embodiment of the present invention is suitable for a call scene in a large signal environment. The large signal refers to a relatively large signal amplitude range, which easily exceeds the processing capability of components. The mobile terminal collects the user's voice signal through the microphone (MIC, microphone) set at the bottom, but in a large signal environment, the large signal causes the MIC to be close to saturation or saturated, and the sound collected by the MIC will appear silent for a period of time, causing the input CPU (Central Processing Unit) The signal is distorted, resulting in poor signal quality and affecting call quality. At this time, it is necessary to reduce the sensitivity of the sound collection device to avoid saturation affecting the collection and processing of sound signals, so that even in a large signal environment, the acquired sound signals can still be better processed and the call quality can be improved.

Mobile terminals refer to handheld mobile electronic devices with call functions, including mobile phones, telephones, walkie-talkies, etc.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of the implementation flow of the sound signal processing method provided by the first embodiment of the present invention, which can be applied to the above-mentioned mobile terminal. The method includes the following steps:

S101. Detect whether the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value;

When the user talks through the mobile terminal, the mobile terminal obtains the sound signal through the first sound collection device, and detects whether the amplitude of the sound signal obtained by the first sound collection device exceeds a preset value, that is, judges whether the first sound collection device has obtained Whether the amplitude of the sound signal is too large, the sound signal with too large amplitude will affect the ability of the first sound collection device to process the signal and tend to be saturated, so that the normal sound signal cannot be output.

S102. If so, switch the second sound collection device to an analog input channel, and obtain a sound signal through the second sound collection device, and the signal sensitivity of the second sound collection device is lower than that of the first sound collection device;

If the amplitude of the sound signal acquired by the first sound collection device exceeds the preset value, the control chip switches the second sound collection device to an analog input channel, and the signal sensitivity of the second sound collection device is lower than that of the first sound The acquisition device obtains a signal with a large amplitude through the second sound acquisition device. Due to its low sensitivity, only a sound signal with a small amplitude can be obtained, so the normal processing of the sound signal will not be affected by saturation.

S103. Process the sound signal acquired by the second sound collection device, and output the processed sound signal.

Since the signal sensitivity of the second sound collection device is low, the collected sound signal often needs to be amplified, and the processed sound signal is input to the processor for further processing.

In the embodiment of the present invention, when the amplitude of the sound signal acquired by the first sound collection device exceeds the preset value, the second sound collection device with lower sensitivity is switched to the analog input channel, and the amplitude of the signal collected by the second sound collection device is large The sound signal can avoid the acquisition and processing of the sound signal being affected due to the sound collection device approaching saturation or saturation, and the sound signal of good quality cannot be obtained, thereby improving the sound signal collection quality and improving the call quality.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a sound signal processing method in a second embodiment of the present invention, which can be applied to a mobile terminal. The method includes the following steps:

S201. Detect whether the amplitude of the sound signal acquired through the microphone exceeds a preset value;

The microphone is a device for collecting sound signals, that is, when the microphone is the first sound collection device, it detects whether the amplitude of the sound signal obtained through the microphone exceeds a preset value. The sound signal will be distorted.

It should be noted that if there are two microphones, one is the main microphone located at the bottom of the mobile phone, which is mainly used to collect sound signals; the other is a secondary microphone located at the top or back of the mobile phone, which is mainly used for noise reduction and call filtering background noise during the process, the main microphone is a device for collecting sound signals.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of connection of various devices in an embodiment of the present invention. The microphone and speaker can be switched to the analog input channel through the analog switch for collecting sound signals. After the collected signal is sent from the microphone or speaker, it enters the power amplifier for amplification, and then enters the analog-to-digital converter (ADC, Analog-to-Digital Converter) to convert it into a digital signal, and then sends it to the processor.

S202. If so, switch the speaker to an analog input channel, and obtain a sound signal through the speaker;

If the amplitude of the sound signal obtained through the microphone exceeds the preset value, the control chip sends an instruction to trigger the virtual switch, switches the speaker to an analog input channel, and obtains the sound signal through the vibration of the speaker diaphragm.

The loudspeaker is provided with a vibrating membrane, and the vibration of the loudspeaker vibrating membrane is used to collect sound signals.

S203. Process the sound signal acquired by the speaker, and output the processed sound signal.

A magnet is arranged in the loudspeaker, and the sound signal is converted into an electric signal after cutting the magnetic induction line. A power amplifier is provided in the speaker to amplify the electrical signal.

The loudspeaker outputs the amplified electrical signal to the ADC to convert it into a digital signal, outputs the digital signal to the power amplifier, amplifies the digital signal and transmits it to the processor. Specifically, the processor may be an AP (Application Processor) end processor.

In the embodiment of the present invention, when the amplitude of the sound signal acquired by the microphone exceeds the preset value, the speaker is switched to the analog input channel, and the sound signal is collected through the vibration of the speaker diaphragm, which is not affected by the large signal amplitude and can be output after amplification To the processor, improve the acquisition quality of the sound signal, and then improve the call quality.

Please refer to FIG. 4. FIG. 4 is a schematic diagram of the implementation flow of the sound signal processing method provided by the third embodiment of the present invention, which can be applied to the above-mentioned mobile terminal. The method includes the following steps:

S301. Detect whether the amplitude of the sound signal acquired through the first microphone exceeds a preset value;

The first microphone is a device for collecting sound signals, that is, when the first sound collecting device is the first microphone, it is detected whether the amplitude of the sound signal obtained by the first microphone exceeds a preset value, and if the preset value is exceeded, the first The microphone is saturated or tends to be saturated, and the collected sound signal will be distorted.

Please refer to FIG. 5 . FIG. 5 is a schematic diagram of connection of various devices in an embodiment of the present invention. The first microphone and the second microphone can be switched to an analog input channel through an analog switch for collecting sound signals. After the collected signal is sent from the first microphone or the second microphone, it enters the power amplifier for amplification, and then enters the ADC to convert it into a digital signal, and then sends it to the processor.

S302. If yes, switch the second microphone whose signal sensitivity is lower than that of the first microphone to an analog input channel, and obtain a sound signal through the second microphone;

If the amplitude of the sound signal obtained through the first microphone exceeds the preset value, the control chip sends an instruction to trigger the virtual switch, switches the second microphone to an analog input channel, and obtains the sound signal through the second microphone.

The second microphone can be arranged at the bottom of the mobile terminal, or at the top of the mobile terminal.

S303. Process the sound signal acquired by the second microphone, and output the processed sound signal.

The sound signal acquired by the second microphone is output to the ADC to be converted into a digital signal, the digital signal is output to the power amplifier, and the digital signal is amplified and then transmitted to the processor of the mobile terminal.

In the embodiment of the present invention, when the amplitude of the sound signal obtained by the first microphone exceeds the preset value, the second microphone with lower sensitivity is switched to the analog input channel, and the sound signal with a large signal amplitude is collected by the second microphone, which can avoid Since the first microphone is approaching saturation or saturation, the collection and processing of the sound signal is affected, and the sound signal with good quality cannot be obtained, so that the collection quality of the sound signal can be improved, and the call quality can be improved.

It should be noted that the connection schematic diagram of each device in the embodiment of the present invention can also be shown in FIG. The sound collection device switches from the first microphone to a second microphone or speaker with low signal sensitivity. After the collected signal is sent from the microphone or speaker, it enters the power amplifier for amplification, and then enters the ADC to convert it into a digital signal, and then sends it to the processor. The specific process is as shown in the foregoing embodiments, and will not be repeated here.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a sound signal processing device in a fourth embodiment of the present invention. The sound signal processing device can be built into a mobile terminal to perform the sound signal processing in the above-mentioned embodiment shown in FIG. 1 method, the sound signal processing device includes: a detection module 401 , a control module 402 and a processing module 403 .

A detection module 401, configured to detect whether the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value;

That is, it is judged whether the amplitude of the sound signal acquired by the first sound collection device is too large, the sound signal with too large amplitude will affect the ability of the first sound collection device to process the signal tends to be saturated, and cannot output a normal sound signal.

The control module 402 is configured to switch the second sound collection device to an analog input channel if yes, and obtain a sound signal through the second sound collection device, the signal sensitivity of the second sound collection device is lower than that of the first sound collection device ;

If the amplitude of the sound signal acquired by the first sound collection device exceeds the preset value, the control module 402 switches the second sound collection device to an analog input channel, and the signal sensitivity of the second sound collection device is lower than that of the first sound collection device. The sound collection device acquires a signal with a large amplitude through the second sound collection device. Due to its low sensitivity, it can only obtain a sound signal with a small amplitude, so the normal processing of the sound signal will not be affected by saturation.

The processing module 403 is configured to process the sound signal acquired by the second sound collection device, and output the processed sound signal.

Since the signal sensitivity of the second sound collection device is low, the collected sound signal often needs to be amplified, and the processed sound signal is input to the processor for further processing.

For details not covered in this embodiment, please refer to the description of the embodiment shown in FIG. 1 above, and details are not repeated here.

In the embodiment of the present invention, when the amplitude of the sound signal acquired by the first sound collection device exceeds the preset value, the second sound collection device with lower sensitivity is switched to the analog input channel, and the amplitude of the signal collected by the second sound collection device is large The sound signal can avoid the acquisition and processing of the sound signal being affected due to the sound collection device approaching saturation or saturation, and the sound signal of good quality cannot be obtained, thereby improving the sound signal collection quality and improving the call quality.

Still referring to FIG. 7, the difference between the sound signal processing device in the fifth embodiment of the present invention and the device in the fourth embodiment is that:

Further, the first sound collection device is a microphone, and the control module 402 is also configured to switch the speaker to an analog input channel, and acquire sound signals through the speaker.

The control module 402 is specifically configured to trigger a virtual switch, switch the speaker to an analog input channel, and obtain sound signals through the vibration of the speaker diaphragm.

When the microphone is a device for collecting sound signals, the detection module 401 detects whether the amplitude of the sound signal obtained through the microphone exceeds a preset value. If the preset value exceeds the preset value, the microphone is saturated or tends to be saturated, and the processed and collected sound signal will be distorted.

If the amplitude of the sound signal obtained through the microphone exceeds the preset value, the control module 402 controls to trigger the virtual switch, switches the speaker to an analog input channel, and obtains the sound signal through the vibration of the speaker diaphragm.

The loudspeaker is provided with a vibrating membrane, and the vibration of the loudspeaker vibrating membrane is used to collect sound signals.

Further, the loudspeaker converts the acquired sound signal into an electric signal, and a magnet is arranged in the loudspeaker, and the sound signal is converted into an electric signal after cutting the magnetic field line. A power amplifier is provided in the speaker to amplify the electrical signal.

The processing module 403 is also used to control the speaker to amplify the electrical signal and output it to the analog-to-digital converter, and convert the amplified electrical signal into a digital signal through the analog-to-digital converter, and the digital signal is amplified by the power amplifier and output to the processor.

The first sound collection device is the first microphone, and the control module 402 is further configured to switch the second microphone, whose signal sensitivity is lower than that of the first microphone, to an analog input channel, and acquire sound signals through the second microphone.

For details not covered in this embodiment, please refer to the descriptions of the foregoing embodiments, and details are not repeated here.

In the embodiment of the present invention, when the amplitude of the sound signal acquired by the first sound collection device exceeds the preset value, the second sound collection device with lower sensitivity is switched to the analog input channel, and the amplitude of the signal collected by the second sound collection device is large The sound signal can avoid the acquisition and processing of the sound signal being affected due to the sound collection device approaching saturation or saturation, and the sound signal of good quality cannot be obtained, thereby improving the sound signal collection quality and improving the call quality.

Please refer to FIG. 8 . FIG. 8 is a schematic diagram of a hardware structure of a mobile terminal provided by an embodiment of the present invention.

The mobile terminal described in this embodiment includes:

A memory 51, a processor 52, and a computer program stored in the memory 51 and operable on the processor. When the processor executes the program, the sound signal processing methods described in the foregoing embodiments are implemented.

Further, the mobile terminal also includes:

at least one input device 53; at least one output device 54.

The aforementioned memory 51 , processor 52 , input device 53 and output device 54 are connected through a bus 55 .

Wherein, the input device 53 may specifically be a camera, a touch panel, a physical button or a mouse, and the like. The output device 54 can specifically be a display screen.

The memory 51 may be a high-speed random access memory (RAM, Random Access Memory) memory, or a non-volatile memory (non-volatile memory), such as a disk memory. The memory 51 is used to store a set of executable program codes, and the processor 52 is coupled with the memory 51 .

Furthermore, an embodiment of the present invention also provides a computer-readable storage medium, which can be set in the mobile terminal in each of the above-mentioned embodiments, and the computer-readable storage medium can be the above-mentioned FIG. 8 memory in the example embodiment. A computer program is stored on the computer-readable storage medium, and when the program is executed by a processor, the sound signal processing method described in the embodiments shown in FIG. 1 , FIG. 2 , and FIG. 4 is implemented. Further, the computer storage medium can also be a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, etc., which can store medium for program code.

It should be noted that each functional module in each embodiment of the present invention may be integrated into one processing module, each module may exist separately physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of software products.

It should be noted that, for the sake of simplicity of description, the aforementioned method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

The above is a description of the sound signal processing method, device, mobile terminal and computer-readable storage medium provided by the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, they will understand both the specific implementation and the scope of application. There are changes, and in summary, the contents of this specification should not be construed as limiting the present invention.

Claims (12)

1. A sound signal processing method, characterized in that the method comprises: Detecting whether the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value; If so, switch the second sound collection device to an analog input channel, and obtain a sound signal through the second sound collection device, the signal sensitivity of the second sound collection device is lower than that of the first sound collection device; The sound signal acquired by the second sound collection device is processed, and the processed sound signal is output. 2. The method according to claim 1, wherein said switching the second sound collection device to an analog input channel, and obtaining a sound signal through the second sound collection device comprises: Switch the speaker to an analog input channel and get the sound signal through said speaker. 3. The method according to claim 2, wherein said switching the loudspeaker to an analog input channel, and obtaining a sound signal through the loudspeaker comprises: The virtual switch is triggered to switch the speaker to an analog input channel, and the sound signal is obtained through the vibration of the speaker diaphragm. 4. The method according to claim 2 or 3, wherein the loudspeaker converts the acquired sound signal into an electrical signal, then processes the sound signal acquired by the second sound collection device, and converts the processed sound signal into an electrical signal. The audio signal output includes: The loudspeaker is controlled to amplify the electrical signal and output it to an analog-to-digital converter, and the amplified electrical signal is converted into a digital signal through the analog-to-digital converter, and the digital signal is amplified by a power amplifier and output to a processor. 5. The method according to claim 1, wherein the first sound collection device is a first microphone, the second sound collection device is switched to an analog input channel, and the second sound collection device Acquire sound signals, including: Switching a second microphone whose signal sensitivity is lower than that of the first microphone to an analog input channel, and acquiring a sound signal through the second microphone. 6. A sound signal processing device, characterized in that the device comprises: A detection module, configured to detect whether the amplitude of the sound signal acquired by the first sound collection device exceeds a preset value; The control module is configured to switch the second sound collection device to an analog input channel if yes, and obtain a sound signal through the second sound collection device, and the signal sensitivity of the second sound collection device is lower than that of the first sound collection device; A processing module, configured to process the sound signal acquired by the second sound collection device, and output the processed sound signal. 7. The device according to claim 6, wherein the control module is further configured to switch the speaker to an analog input channel, and obtain sound signals through the speaker. 8. The device according to claim 7, wherein the control module is specifically configured to trigger a virtual switch, switch the speaker to an analog input channel, and obtain the sound through the vibration of the speaker diaphragm Signal. 9. The device according to claim 7 or 8, wherein the loudspeaker converts the acquired sound signal into an electrical signal, and the processing module is also used to control the loudspeaker to amplify the electrical signal and then output to an analog-to-digital converter, and the amplified electrical signal is converted into a digital signal by the analog-to-digital converter, and the digital signal is amplified by the power amplifier and then output to the processor. 10. The device according to claim 6, wherein the first sound collection device is a first microphone, and the control module is further configured to switch a second microphone whose signal sensitivity is lower than that of the first microphone to the analog input channel and acquire the sound signal through the second microphone. 11. A mobile terminal, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor implements any one of claims 1 to 5 when executing the program. The sound signal processing method described in the item. 12. A computer-readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the sound signal processing method according to any one of claims 1 to 5 is implemented.