Intelligent microphone and electronic equipment

Abstract

The invention relates to the technical field of hardware circuits, and discloses an intelligent microphone and electronic equipment, and the intelligent microphone comprises an acquisition module, a processing module and an identification module. The processing module is used for switching the current working mode into a low-power-consumption mode or a sleep mode when the processor is in the sleep state; the acquisition module is used for transmitting the acquired external audio to the identification module when the processor is in the dormant state; and the identification module is used for identifying the external audio and transmitting an identification result to the processor, so that the processor performs state switching according to the identification result. Compared with the prior art, the external audio collected by the collection module can be directly transmitted to the recognition module for recognition without passing through the processing module, so that the processing module can switch the current working mode into the low-power-consumption mode or the sleep mode, and the power consumption can be reduced.

Description

Technical Field

[0001] The present application relates to the field of hardware circuit technology, and in particular to a smart microphone and electronic equipment. Background Art

[0002] The voice signal acquisition and localized instant processing of smart microphones are increasingly recognized and demanded by the market due to their fast response speed and small size brought by integration. Smart microphones generally include acquisition modules, processing modules and recognition modules. The acquisition modules, processing modules and recognition modules are connected in series and then connected to the processor of the electronic device to complete the audio acquisition.

[0003] When the existing smart microphone is used in an electronic device with a standby function (such as a smart watch, etc.), if the electronic device is in a dormant state, the general process is that the acquisition module collects external audio and amplifies it through the processing module, and then transmits the processed external audio to the recognition module for recognition. The recognition module determines whether there is a wake-up word in the external audio and transmits the recognition result to the processor, so that the processor determines whether it needs to switch to a working state based on the recognition result. Whether the external audio is processed by the processing module does not affect the recognition of the recognition module, but because the existing acquisition module, processing module and recognition module are in series, the processing module is always in a working state, which causes the power consumption of the smart microphone of the electronic device to be high when it is in standby. Summary of the invention

[0004] The main purpose of the present application is to provide an intelligent microphone and an electronic device, aiming to solve the technical problem that when the existing electronic device is in a dormant state, the processing module needs to be in a working state all the time, resulting in high power consumption of the intelligent microphone of the electronic device when it is in standby mode.

[0005] To achieve the above object, the present application provides a smart microphone, which includes: a collection module, a processing module and a recognition module;

[0006] The acquisition module is connected to the processing module and the identification module respectively, and the processing module and the identification module are also connected to the processor;

[0007] The processing module is used to switch the current working mode to a low power consumption mode or a sleep mode when the processor is in a sleep state;

[0008] The acquisition module is used to transmit the collected external audio to the recognition module when the processor is in the sleep state;

[0009] The recognition module is used to recognize the external audio and transmit the recognition result to the processor, so that the processor switches the state according to the recognition result.

[0010] In one embodiment, the identification module includes: an analog front end unit, a signal processing unit, and an output interface;

[0011] The analog front-end unit is connected to the acquisition module and the signal processing unit respectively, and the output interface is connected to the signal processing unit and the processor respectively;

[0012] The analog front-end unit is used to amplify the external audio and transmit the amplified external audio to the signal processing unit;

[0013] The signal processing unit is used to recognize the amplified external audio and transmit the recognition result to the processor through the output interface.

[0014] In one embodiment, the processing module is also used to switch the current working mode to the low power consumption mode or sleep mode when receiving a low power consumption signal sent by the processor, and the low power consumption signal is a signal generated by the processor when it is in the sleep state.

[0015] In one embodiment, the low power consumption signal includes at least one of a clock frequency adjustment signal and a power supply voltage adjustment signal, wherein the clock frequency adjustment signal is a signal for adjusting the clock frequency of the processing module, and the power supply voltage adjustment signal is a signal for adjusting the power supply voltage of the processing module.

[0016] In one embodiment, the processing module is also used to switch the current working mode to the normal mode when receiving a working signal sent by the processor, and the working signal is a signal generated by the processor when it detects that the recognition result is that there is a preset wake-up audio in the external audio.

[0017] In one embodiment, the acquisition module is further used to transmit the external audio to the processing module when the processing module is in a normal mode;

[0018] The processing module is further used to process the external audio and transmit the processed external audio to the processor, so that the processor performs corresponding operations according to the processed external audio.

[0019] The acquisition module is further configured to transmit the external audio to the processing module when the processing module switches from the low power consumption mode or the sleep mode to the normal mode;

[0020] The processing module is further used to process the external audio and transmit the processed external audio to the processor, so that the processor performs corresponding operations according to the processed external audio.

[0021] In one embodiment, when the number of the acquisition module is one, the power supply end of the acquisition module is connected to the processing module, and the output end of the acquisition module is connected to the processing module and the identification module respectively.

[0022] In one embodiment, when the acquisition module is a single capacitor structure, the power supply end of the acquisition module is connected to the processing module, and the output end of the acquisition module is connected to the processing module and the identification module respectively;

[0023] When the acquisition module is a dual-capacitor structure, the power supply end of the acquisition module is connected to the processing module, the first output end of the acquisition module is connected to the processing module, and the second output end of the acquisition module is connected to the identification module.

[0024] In one embodiment, when the number of the acquisition modules is at least two, the power supply end of each acquisition module is connected to the processing module, the output end of at least one acquisition module is connected to the processing module, and the output end of at least one acquisition module is connected to the identification module.

[0025] In addition, to achieve the above-mentioned purpose, the present application also provides an electronic device, the electronic device comprising: a processor and the smart microphone as described above;

[0026] The processor is connected to a processing module in the smart microphone and a recognition module of the smart microphone.

[0027] The present application provides an intelligent microphone and an electronic device, the intelligent microphone comprising: an acquisition module, a processing module and an identification module; the acquisition module is connected to the processing module and the identification module respectively, and the processing module and the identification module are also connected to a processor; the processing module is used to switch the current working mode to a low power consumption mode or a sleep mode when the processor is in a sleep state; the acquisition module is used to transmit the collected external audio to the identification module when the processor is in the sleep state; the identification module is used to identify the external audio and transmit the identification result to the processor, so that the processor switches the state according to the identification result.

[0028] Since the acquisition module in the present application is connected to the processing module and the identification module respectively, and the processing module and the identification module are also connected to the processor, in actual use, the processing module can switch the current working mode to a low-power mode or a sleep mode when the processor is in a sleep state, and the acquisition module can directly transmit the collected external audio to the identification module when the processor is in a sleep state, and the identification module then identifies the external audio and transmits the identification result to the processor, so that the processor switches the state according to the identification result. Compared with the existing acquisition module, processing module and identification module in series, the acquisition module in the present application is respectively connected in parallel with the processing module and the identification module, and then the external audio collected by the acquisition module can be directly transmitted to the identification module for identification without passing through the processing module, so that the processing module can switch the current working mode to a low-power mode or a sleep mode when the processor is in a sleep state, thereby reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 This is a block diagram of the structure inside a traditional electronic device;

[0032] Figure 2 This is a schematic diagram of the structure of the first embodiment of the smart microphone of this application;

[0033] Figure 3 This is a schematic diagram of the structure of the recognition module in the first embodiment of the smart microphone of this application;

[0034] Figure 4 This is a structural diagram of a processing module in the second embodiment of the smart microphone of this application;

[0035] Figure 5 This is a structural schematic diagram of the third embodiment of the smart microphone of this application;

[0036] Figure 6 This is another structural schematic diagram of the third embodiment of the smart microphone of the present application;

[0037] Figure 7 This is another structural schematic diagram of the third embodiment of the smart microphone of the present application.

[0038] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, the descriptions of "first", "second", etc. in this application are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] It is understandable that the voice signal collection and localized instant processing of smart microphones are increasingly recognized and demanded by the market due to their fast response speed and small size brought by integration. Smart microphones generally include a collection module, a processing module and a recognition module. The collection module, processing module and recognition module are connected in series in sequence and then connected to the processor of the electronic device to complete the audio collection.

[0044] For ease of understanding, refer to Figure 1 , Figure 1 This is a block diagram of the structure of a traditional electronic device. Figure 1 As shown, in this embodiment, the electronic device may include: an intelligent microphone and a processor; wherein the acquisition module, the processing module and the recognition module in the intelligent microphone are connected in series in sequence, the recognition module is connected to the communication interface of the processor, and the processing module is connected to the audio input interface of the processor.

[0045] When an existing smart microphone is used on an electronic device with a standby function (such as a smart watch, etc.), if the electronic device is in a sleep state, the general process is that the acquisition module collects external audio and amplifies it through the processing module, and then transmits the processed external audio to the recognition module for recognition. The recognition module determines whether there is a wake-up word in the external audio, and transmits the recognition result to the processor through the communication interface of the processor, so that the processor determines whether it needs to switch to the working state according to the recognition result.

[0046] If there is no wake-up word in the external audio, the processor can continue to remain in the sleep state; if there is a wake-up word in the external audio, the processor can switch to the working state; and in the working state, the acquisition module can transmit the collected external audio to the processing module for processing, and the processing module can transmit the processed external audio directly to the processor through the audio input interface of the processor, so that the processor can perform corresponding operations according to the processed external audio (for example, asking about the weather, asking about the time, etc.), and the specific operations can be not restricted.

[0047] Whether the external audio is processed by the processing module does not affect the recognition of the recognition module. However, since the existing acquisition module, processing module and recognition module are in series, the processing module is always in working state, which causes the smart microphone of the electronic device to consume higher power when in standby mode.

[0048] Therefore, in order to solve the above defects, the present embodiment provides a smart microphone and electronic device, in which the acquisition module in the smart microphone is connected to the processing module and the recognition module respectively, and the processing module and the recognition module are also connected to the processor. In actual use, the processing module can switch the current working mode to a low power mode or a sleep mode when the processor is in a sleep state, and the acquisition module can directly transmit the collected external audio to the recognition module when the processor is in a sleep state, and the recognition module then recognizes the external audio and transmits the recognition result to the processor, so that the processor switches the state according to the recognition result. Compared with the existing acquisition module, processing module and recognition module in series, the acquisition module in the present embodiment is respectively connected in parallel with the processing module and the recognition module, so that the external audio collected by the acquisition module can be directly transmitted to the recognition module for recognition without passing through the processing module, so that the processing module can switch the current working mode to a low power mode or a sleep mode when the processor is in a sleep state, thereby reducing power consumption.

[0049] For ease of understanding, the following combination Figures 2 to 7 The smart microphone provided in the embodiment of the present application is introduced in detail.

[0050] Reference Figure 2 , Figure 2This is a structural diagram of the first embodiment of the smart microphone of the present application, and the first embodiment of the smart microphone of the present application is proposed. Figure 2 As shown, in this embodiment, the smart microphone includes: a collection module, a processing module and a recognition module;

[0051] The acquisition module is connected to the processing module and the identification module respectively, and the processing module and the identification module are also connected to a processor.

[0052] It should be noted that the smart microphone in this embodiment can be any microphone for audio collection, which may include the above-mentioned collection module, processing module and recognition module. The collection module is connected to the processing module and the recognition module respectively, and the processing module and the recognition module are also connected to the processor.

[0053] The acquisition module may be a module for audio acquisition, such as an acoustic sensor manufactured by micro-electro-mechanical systems (MEMS) technology. This embodiment uses a MEMS acoustic sensor for illustration.

[0054] The processing module can be a module with functions such as amplification, analog-to-digital conversion, and filtering of external audio. In this embodiment, the processing module can be an application-specific integrated circuit (ASIC) in a MEMS microphone, and the ASIC can amplify, convert analog-to-digital, and filter the electrical signal generated by the MEMS acoustic sensor. At the same time, the ASIC can also provide an external bias for the MEMS acoustic sensor, because the ASIC can also contain a charge pump (CP), through which the external bias voltage can be provided for the MEMS acoustic sensor.

[0055] The recognition module may be a module with audio recognition, such as a module with a voice processing chip, etc. The voice processing chip may have audio feature extraction and neural network recognition functions, and the voice processing chip may perform feature extraction and recognition on the audio. Of course, other forms may also be used, and this embodiment does not limit this.

[0056] The processor may be a processor in any electronic product for performing corresponding operations according to audio. For example, if the electronic device is a smart watch, the processor may be a processor in the electronic watch for performing corresponding operations (such as asking about the weather or the time) according to audio. The processor may be set according to actual conditions, and this embodiment does not limit this.

[0057] In this embodiment, the processing module is used to switch the current working mode to a low power consumption mode or a sleep mode when the processor is in a sleep state.

[0058] It is understandable that the processor in this embodiment can have two states, namely, a dormant state and a working state. Similarly, the electronic device in this embodiment can also have two working states, namely, the dormant state and the working state. When the electronic device is in the working state, the processor is in the working state, and when the electronic device is in the dormant state, the processor is in the dormant state.

[0059] It is also understandable that since ASICs generally have two modes, namely, a low power mode and a normal mode, or a sleep mode and a normal mode, the power consumption of the ASIC is low in the low power mode or the sleep mode, and the ASIC is in a normal working state in the normal mode. Figure 1 As shown, even if the existing processing module (i.e., the above-mentioned ASIC) has two modes, due to the use of a series mode, in order to enable the recognition module (i.e., the above-mentioned voice processing chip) to timely recognize the collected external audio, thereby switching the processor from the sleep state to the working state in time, the processing module needs to remain in the working state, that is, it needs to process the external audio collected by the acquisition module (i.e., the above-mentioned MEMS acoustic sensor) and transmit it to the recognition module for recognition. Even if the existing ASIC has a low-power mode and a normal mode, or a sleep mode and a normal mode, it cannot be in a low-power mode or a sleep mode when the processor is in a sleep state, resulting in high power consumption.

[0060] In this embodiment, when the processor is in sleep mode, due to the parallel connection, that is, Figure 2 According to the connection mode shown, the processing module can switch the current working mode from the normal mode to the low power mode or the sleep mode.

[0061] As for the acquisition module and the recognition module, in this embodiment, the acquisition module is used to transmit the collected external audio to the recognition module when the processor is in the sleep state;

[0062] The recognition module is used to recognize the external audio and transmit the recognition result to the processor, so that the processor switches the state according to the recognition result.

[0063] It should be understood that continuing Figure 2As shown, in this embodiment, the above-mentioned processing module can be specifically connected to the audio input interface of the processor, and the recognition module can be connected to the communication interface of the processor. In actual use, the acquisition module can transmit the collected external audio to the recognition module when the processor is in a dormant state. After the recognition module recognizes the external audio, it can transmit the obtained recognition result to the processor. The processor can determine whether the user needs to wake up the electronic device based on the recognition result, which can be specifically achieved through wake-up word detection and other methods. This embodiment does not limit this.

[0064] If the processor detects that the recognition result is not the result that the user has a need to wake up the electronic device, the processor continues to remain in the dormant state, and the processing module continues to remain in the low power consumption mode or the dormant mode; if the processor detects that the recognition result is the result that the user has a need to wake up the electronic device, the processor can switch the dormant state to the working state. Therefore, in this embodiment, since the processing module is connected in parallel with the recognition module, the processing module can also be switched to the low power consumption mode or the dormant mode when the processor is in the dormant state, thereby reducing power consumption.

[0065] Furthermore, considering that when the recognition module performs external audio recognition, the electrical signal of the external audio collected by the collection module may be relatively weak, the recognition module in this embodiment may amplify the audio signal. Figure 3 , Figure 3 This is a schematic diagram of the structure of the recognition module in the first embodiment of the smart microphone of this application. Figure 3 As shown, in this embodiment, the identification module includes: an analog front-end unit, a signal processing unit and an output interface;

[0066] The analog front-end unit is connected to the acquisition module and the signal processing unit respectively, and the output interface is connected to the signal processing unit and the processor respectively;

[0067] The analog front-end unit is used to amplify the external audio and transmit the amplified external audio to the signal processing unit;

[0068] The signal processing unit is used to recognize the amplified external audio and transmit the recognition result to the processor through the output interface.

[0069] It should be noted that the above-mentioned analog front-end unit can be a unit for amplifying the electrical signal of external audio, for example, it can be a unit with an operational amplifier, etc., and this embodiment does not limit this. The above-mentioned signal processing unit can be provided with a circuit for feature extraction of the electrical signal of external audio and a neural network circuit for identification, which can be set according to actual conditions, and this embodiment does not limit this. The above-mentioned output interface can be an interface connected to the communication interface of the processor, which can generally include an interrupt interface, and an Inter-Integrated Circuit (I2C) interface or a serial peripheral interface (SPI), etc., which can be set according to actual conditions, and this embodiment does not limit this.

[0070] Furthermore, in actual use, the analog front-end unit can amplify the external audio collected by the acquisition module, and transmit the amplified external audio to the signal processing unit. The signal processing unit can recognize the amplified external audio and transmit the recognition result to the processor through the output interface. The processor can switch the state according to the recognition result.

[0071] Continue to refer to Figure 2 and Figure 3 , and based on the above-mentioned first embodiment, a second embodiment of the smart microphone of the present application is proposed.

[0072] In order to enable the processing module to switch to a low power consumption mode or a sleep mode, in the present embodiment, the processing module is further used to switch the current working mode to the low power consumption mode or the sleep mode upon receiving a low power consumption signal sent by the processor, wherein the low power consumption signal is a signal generated by the processor when the processor is in the sleep state.

[0073] It should be noted that the low power consumption signal may be a signal that puts the ASIC into low power consumption mode or sleep mode. In this embodiment, the low power consumption signal includes at least one of a clock frequency adjustment signal or a power supply voltage adjustment signal, the clock frequency adjustment signal is a signal for adjusting the clock frequency of the processing module, and the power supply voltage adjustment signal is a signal for adjusting the power supply voltage of the processing module.

[0074] It is understandable that in actual use, when the processor switches from a working state to a sleep state, the processor can generate a low-power signal and transmit it to the processing module, which can specifically be at least one of the above-mentioned clock frequency adjustment signal or the supply voltage adjustment signal.

[0075] When the processor generates a clock frequency adjustment signal, since the processing module needs the clock frequency output by the processor to work, the clock frequency adjustment signal can essentially be a signal corresponding to the reduced clock frequency. Then the processor can reduce the clock frequency transmitted to the processing module, and when the processing module receives the reduced clock frequency, it can switch from normal mode to low power mode or sleep mode. The specific adjusted clock frequency can be set according to the actual situation, and this embodiment does not limit this.

[0076] When the processor generates a power supply voltage adjustment signal, since the processing module needs the power supply voltage output by the processor to work, the essence of the power supply voltage adjustment signal can be a signal corresponding to the reduced power supply voltage. Then the processor can reduce the power supply voltage transmitted to the processing module, and when the processing module receives the reduced power supply voltage, it can switch from the normal mode to the low power mode or the sleep mode. The specific adjusted power supply voltage can be set according to the actual situation, and this embodiment does not limit this.

[0077] It should be emphasized that, in this embodiment, the low power consumption signal may also be other signals for reducing the power consumption of the processing module, and this embodiment does not limit this.

[0078] Furthermore, in order for the processing module to switch from a low power consumption mode or a sleep mode to a normal mode when the processor switches from a sleep state to a working state, in the present embodiment, the processing module is also used to switch the current working mode to a normal mode upon receiving a working signal sent by the processor, and the working signal is a signal generated by the processor when it detects that the recognition result is that there is a preset wake-up audio in the external audio.

[0079] It should be noted that, similar to the low power consumption signal, the essence of the working signal in this embodiment may be a signal corresponding to the restored clock frequency or a signal corresponding to the restored power supply voltage. The preset wake-up audio may be an audio used to indicate that the user has a wake-up requirement.

[0080] In this embodiment, after the recognition module performs recognition, the recognition result can be transmitted to the processor. When the processor detects that the recognition result is the result generated when the above-mentioned preset wake-up audio exists in the external audio, the processor can output a working signal to the processing module, which can be specifically to restore the clock frequency transmitted to the processing module or to restore the power supply voltage transmitted to the processing module. After receiving the working signal, the processing module can switch the current working mode to the normal mode.

[0081] Further, when the processing module is in the normal mode, in this embodiment, the acquisition module is also used to transmit the external audio to the processing module when the processing module is in the normal mode;

[0082] The processing module is further used to process the external audio and transmit the processed external audio to the processor, so that the processor performs corresponding operations according to the processed external audio.

[0083] It should be understood that when the processing module switches to normal mode, the acquisition module can transmit the collected external audio to the processing module for amplification, analog-to-digital conversion, filtering and other processing, and transmit the processed external audio directly to the processor. After receiving the processed external audio, the processor can directly perform corresponding operations based on the processed external audio (for example, answering the current weather, current time, etc.).

[0084] Furthermore, in order to enable identification to be performed during the process of the processing module switching from the low power consumption mode or the sleep mode to the normal mode, in this embodiment, the acquisition module is further used to transmit the external audio to the processing module during the process of the processing module switching from the low power consumption mode or the sleep mode to the normal mode;

[0085] The processing module is further used to process the external audio and transmit the processed external audio to the processor, so that the processor performs corresponding operations according to the processed external audio.

[0086] It should be noted that an audio cache circuit may also be provided in the processing module in this embodiment. The audio cache circuit can be used to cache the external audio collected by the acquisition module when the processing module switches from a low power consumption mode or a sleep mode to a normal mode, and transmit it to the processor after the above processing.

[0087] It should also be noted that the above-mentioned specific audio buffer circuit can be configured according to actual conditions, and this embodiment does not limit this.

[0088] Furthermore, considering that a charge pump for supplying power to the acquisition module may also be provided in the processing module in this embodiment, in order to facilitate understanding of the specific structure of the processing module, refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the processing module in the second embodiment of the smart microphone of this application. Figure 4 As shown, in this embodiment, the processing module may include: a power supply unit, a processing unit and a transmission interface;

[0089] The power supply unit is connected to the acquisition module, the processing unit is connected to the acquisition module and the transmission interface respectively, and the transmission interface is also connected to the processor;

[0090] A power supply unit, used to supply power to the acquisition module;

[0091] The processing unit is used to process the external audio when in the normal mode, and transmit the processed external audio to the processor through the transmission interface, so that the processor performs corresponding operations according to the processed external audio.

[0092] It should be noted that, in this embodiment, the power supply unit may be the charge pump, which may be used to provide an external bias voltage to the acquisition module. The processing unit may be a unit that performs amplification, analog-to-digital conversion, filtering, and other processing on external audio. The transmission interface may be a unit for transmitting low-power signals, working signals, and processed external audio. Therefore, in this embodiment, the transmission interface may be an analog output interface or a digital output interface, such as a pulse density modulation (Pulse Density Modulation, PDM) interface, etc., which is not limited in this embodiment. Therefore, the processing module in this embodiment may be an analog ASIC or a digital ASIC.

[0093] In actual use, when the processor switches from a working state to a sleep state, the processing module can reduce the clock frequency transmitted to the processing module or reduce the power supply voltage transmitted to the processing module, and then the transmission interface can transmit the reduced clock frequency or the reduced power supply voltage to the processing unit, and then the processing unit can switch from a normal mode to a low power consumption mode or a sleep mode, but at this time the power supply unit normally supplies power to the acquisition module.

[0094] When the processor switches from the sleep state to the working state, the processing module can restore the clock frequency transmitted to the processing module or restore the power supply voltage transmitted to the processing module, and then the transmission interface can transmit the restored clock frequency or restored power supply voltage to the processing unit, and then the processing unit can switch from the low power mode or the sleep mode to the normal mode. After the processing unit switches to the normal mode, it can process the external audio normally, and transmit the processed external audio to the processor through the transmission interface.

[0095] Reference Figure 5 , Figure 5 This is a structural schematic diagram of the third embodiment of the smart microphone of the present application. Based on the above embodiments, the third embodiment of the smart microphone of the present application is proposed.

[0096] like Figure 5As shown, in this embodiment, taking into account that there are various forms of MEMS acoustic sensors, in this embodiment, when the number of the acquisition module is one, the power supply end of the acquisition module is connected to the processing module, and the output end of the acquisition module is respectively connected to the processing module and the identification module.

[0097] It should be noted that, in this embodiment, the acquisition unit may use a MEMS acoustic sensor (ie Figure 5 The above power supply unit can use a charge pump (i.e. Figure 5 CP (charge pump) is explained in detail.

[0098] It should also be noted that since the above-mentioned processing unit has functions such as amplification, analog-to-digital conversion and filtering, the processing unit in this embodiment may include an operational amplifier circuit, an analog-to-digital conversion circuit and a filtering circuit, etc., which can be set according to actual conditions, and this embodiment does not limit this.

[0099] It is understandable that the identification module in this embodiment can be integrated into a chip (ie Figure 5 The voice processing chip in the middle) may not be integrated, but this embodiment is described in the form of integration into a chip.

[0100] exist Figure 5 In the case of setting a MEMS acoustic sensor, the power supply unit (i.e., the charge pump) in the processing module can be connected to the power supply end (i.e., the charge pump) of the acquisition module. Figure 5 The processing unit in the above processing module can be connected to the output end of the acquisition module (i.e., the first pin of the MEMS acoustic sensor) for power supply; Figure 5 The second pin of the MEMS acoustic sensor in the recognition module is connected, and the analog front-end unit in the recognition module can also be connected to the output end of the acquisition module to transmit external audio.

[0101] Furthermore, considering the above Figure 5 The form is generally only applicable to MEMS acoustic sensors with a single capacitor structure. For MEMS acoustic sensors with a dual capacitor structure, refer to Figure 6 , Figure 6 This is another structural schematic diagram of the third embodiment of the smart microphone of this application, such as Figure 5 as well as Figure 6 As shown, when the acquisition module is a single capacitor structure, the power supply end of the acquisition module is connected to the processing module, and the output end of the acquisition module is connected to the processing module and the identification module respectively;

[0102] When the acquisition module is a dual-capacitor structure, the power supply end of the acquisition module is connected to the processing module, the first output end of the acquisition module is connected to the processing module, and the second output end of the acquisition module is connected to the identification module.

[0103] It should be noted that Figure 5 is a schematic diagram of a single capacitor structure. Figure 6 is a schematic diagram of a dual capacitor structure. Figure 5 In the MEMS acoustic sensor, a single capacitor structure can be a capacitor consisting of two layers, the upper layer is a hole structure, termed as a back plate, and the lower layer is a closed structure, termed as a diaphragm. When the sound is transmitted to the sensor through the sound inlet, the sound pressure causes the two layers of the diaphragm to vibrate, causing the distance between the diaphragm and the back plate to change, and then the capacitance between the diaphragm and the back plate to change, that is, the external audio is output from the output end of the acquisition module;

[0104] exist Figure 6 In the embodiment, the dual capacitor structure may be a stacked electrode structure using dual back electrodes or dual diaphragms, which may include an upper layer, a middle layer, and a lower layer, wherein the upper layer may be connected to the first output terminal (i.e. Figure 6 The third pin of the MEMS acoustic sensor in the middle layer is connected to the processing unit in the processing module to transmit external audio; the middle layer can be connected to the processing unit in the processing module through the power supply end of the acquisition module (i.e. Figure 6 The first pin of the MEMS acoustic sensor in the processing module is connected to the power supply unit in the processing module for power supply; the lower layer can be powered by the second output terminal of the acquisition module (i.e. Figure 6 The second pin of the MEMS acoustic sensor in the identification module is connected to the analog front-end unit in the identification module for transmitting external audio.

[0105] It should be emphasized that, in this embodiment, if the acquisition module adopts a dual-capacitor structure, the electrical noise interference of the recognition module when recognizing external audio can be effectively reduced.

[0106] It should also be emphasized that the first output end of the above-mentioned acquisition module can be interchanged with the second output end of the acquisition module, that is, the first output end of the acquisition module can be connected to the analog front-end unit of the identification module, and the second output end of the acquisition module can be connected to the processing unit of the processing module. This embodiment does not limit this.

[0107] Furthermore, considering that when the acquisition module adopts a MEMS acoustic sensor with a single capacitor structure, in order to effectively reduce the electrical noise interference of the recognition module when recognizing external audio, refer to Figure 7 , Figure 7 This is another structural diagram of the third embodiment of the smart microphone of the present application. Figure 7As shown, when the number of the acquisition modules is at least two, the power supply end of each acquisition module is connected to the processing module, the output end of at least one acquisition module is connected to the processing module, and the output end of at least one acquisition module is connected to the identification module.

[0108] It is understandable that at least two acquisition modules can be provided in this embodiment. Figure 7 Two are used for illustration, and for the convenience of subsequent explanation, Figure 7 The acquisition modules in the first acquisition module are respectively recorded as the first acquisition module (i.e. Figure 7 MEMS1) and the second acquisition module (i.e. Figure 7 MEMS2).

[0109] Then the power supply terminal (i.e. Figure 7 The first pin of the first MEMS acoustic sensor (MEMS1) in the acquisition module and the power supply terminal (i.e. Figure 7 The first pin of the second MEMS acoustic sensor (MEMS2) is connected to the power supply unit in the processing module for power supply;

[0110] The output terminal (i.e. Figure 7 The second pin of the first MEMS acoustic sensor (MEMS1) in the recognition module can be connected to the analog front-end unit in the recognition module to transmit external audio; the output end of the second acquisition module (i.e. Figure 7 The second pin of the second MEMS acoustic sensor (MEMS2) can be connected to the processing unit in the processing module to transmit external audio.

[0111] Therefore, through Figure 7 In the form of at least two acquisition modules shown, the acquisition module connected to the recognition module can be used specifically to collect external audio and transmit it to the recognition module for recognition, and the acquisition module connected to the processing module can be used specifically to collect external audio and transmit it to the processing module for processing, thereby effectively reducing the electrical noise interference of the recognition module when recognizing external audio.

[0112] In addition, to achieve the above-mentioned purpose, an embodiment of the present application further provides an electronic device, the electronic device comprising: a processor and the smart microphone as described above;

[0113] The processor is connected to a processing module in the smart microphone and a recognition module of the smart microphone.

[0114] It should be noted that the specific structure of the electronic device in this embodiment can refer to the above-mentioned smart microphone embodiment, so the beneficial effects of the electronic device in this embodiment are consistent with the beneficial effects of the above-mentioned smart microphone embodiment, and this embodiment will not be repeated.

[0115] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A smart microphone, characterized in that: The smart microphone includes: a collection module, a processing module and a recognition module; The acquisition module is connected to the processing module and the identification module respectively, and the processing module and the identification module are also connected to the processor; The processing module is used to switch the current working mode to a low power consumption mode or a sleep mode when the processor is in a sleep state; The acquisition module is used to transmit the collected external audio to the recognition module when the processor is in the sleep state; The recognition module is used to recognize the external audio and transmit the recognition result to the processor, so that the processor switches the state according to the recognition result.

2. The smart microphone according to claim 1, characterized in that: The identification module includes: an analog front-end unit, a signal processing unit and an output interface; The analog front-end unit is connected to the acquisition module and the signal processing unit respectively, and the output interface is connected to the signal processing unit and the processor respectively; The analog front-end unit is used to amplify the external audio and transmit the amplified external audio to the signal processing unit; The signal processing unit is used to recognize the amplified external audio and transmit the recognition result to the processor through the output interface.

3. The smart microphone according to claim 1, characterized in that: The processing module is further used to switch the current working mode to the low power consumption mode or the sleep mode when receiving a low power consumption signal sent by the processor, wherein the low power consumption signal is a signal generated by the processor when the processor is in the sleep state.

4. The smart microphone according to claim 3, characterized in that: The low power consumption signal includes at least one of a clock frequency adjustment signal and a power supply voltage adjustment signal. The clock frequency adjustment signal is a signal for adjusting the clock frequency of the processing module, and the power supply voltage adjustment signal is a signal for adjusting the power supply voltage of the processing module.

5. The smart microphone according to claim 1, characterized in that: The processing module is also used to switch the current working mode to the normal mode when receiving a working signal sent by the processor, and the working signal is a signal generated by the processor when it detects that the recognition result is that there is a preset wake-up audio in the external audio.

6. The smart microphone according to claim 5, characterized in that: The acquisition module is further used to transmit the external audio to the processing module when the processing module is in a normal mode; The processing module is further used to process the external audio and transmit the processed external audio to the processor, so that the processor performs corresponding operations according to the processed external audio.

7. The smart microphone according to claim 5, characterized in that: The acquisition module is further configured to transmit the external audio to the processing module when the processing module switches from the low power consumption mode or the sleep mode to the normal mode; The processing module is further used to process the external audio and transmit the processed external audio to the processor, so that the processor performs corresponding operations according to the processed external audio.

8. The smart microphone according to claim 1, wherein: When the number of the acquisition module is one, the power supply end of the acquisition module is connected to the processing module, and the output end of the acquisition module is connected to the processing module and the identification module respectively.

9. The smart microphone according to claim 8, characterized in that: When the acquisition module is a single capacitor structure, the power supply end of the acquisition module is connected to the processing module, and the output end of the acquisition module is connected to the processing module and the identification module respectively; When the acquisition module is a dual-capacitor structure, the power supply end of the acquisition module is connected to the processing module, the first output end of the acquisition module is connected to the processing module, and the second output end of the acquisition module is connected to the identification module.

10. The smart microphone according to claim 1, wherein: When the number of the acquisition modules is at least two, the power supply end of each acquisition module is connected to the processing module, the output end of at least one acquisition module is connected to the processing module, and the output end of at least one acquisition module is connected to the identification module.

11. An electronic device, characterized in that: The electronic device comprises: a processor and a smart microphone as claimed in any one of claims 1 to 10; The processor is connected to a processing module in the smart microphone and a recognition module of the smart microphone.

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