CN212675914U - Equipment with voice awakening function - Google Patents
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- CN212675914U CN212675914U CN202020935646.XU CN202020935646U CN212675914U CN 212675914 U CN212675914 U CN 212675914U CN 202020935646 U CN202020935646 U CN 202020935646U CN 212675914 U CN212675914 U CN 212675914U
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Abstract
The utility model discloses a device with voice wake-up function, which comprises a microphone, a trigger circuit, a voice signal processing circuit, an analog switch and a processor; the trigger circuit generates a trigger signal according to the voice signal collected and output by the microphone; the voice signal processing circuit processes the voice signal collected and output by the microphone into voice data; the analog switch controls the microphone to be communicated between the trigger circuit and the voice signal processing circuit selectively, and the microphone is communicated with the trigger circuit in a default state; during the standby period, if a trigger signal is received, the processor starts the semantic recognition function, controls the analog switch to switch the microphone to be communicated with the voice signal processing circuit and controls the voice signal processing circuit to be switched from a dormant state to a running state; the processor receives the voice data output by the voice signal processing circuit and carries out semantic recognition, and when recognizing that the voice data is a starting instruction, the processor controls the equipment to start, so that a voice awakening function is realized, and the standby power consumption of the equipment is extremely low.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, specifically speaking relates to a circuit that is fit for using in the electrical equipment that the standby required low-power consumption, realizes the pronunciation function of awakening up.
Background
With the development of science and technology and the increasing demand of consumers on the intelligent degree of home appliances, for some electric devices with standby mode, the integration of voice wake-up function in the device is a frequently selected means by many manufacturers to improve the intelligent level of the device.
In order to realize the voice wake-up function on the equipment, a microphone and a voice signal processing circuit need to be configured on the equipment, and semantic recognition software is written in a CPU (central processing unit) so as to jointly complete tasks such as acquisition and processing of user voice, semantic recognition and the like.
Since the voice wake-up event occurs during the standby period of the device, in order to reduce the power consumption of the system in the standby mode, and for an electrical device without a voice wake-up function, in order to meet the standby power consumption standard specified in the industry, a common design is to turn off most hardware circuits in the system, control the CPU to enter a deep sleep state, and only reserve some clocks and interrupt interfaces of the CPU to continue operating, thereby reducing the power consumption of the system as much as possible. However, for an electrical device with a voice wake-up function, in order to automatically wake up the device from a standby mode to a normal operating mode according to a power-on voice instruction of a user during a standby period of the device, in the prior art, a microphone and a voice signal processing circuit are designed to keep a power-on operating state during the standby period, and semantic recognition software in a CPU is maintained to continue operating, which causes the microphone and the voice signal processing circuit to consume power all the time during the standby period, and the CPU needs to continue operating due to the semantic recognition software, which also generates a large power consumption, so that the standby power consumption of the device is obviously increased.
Disclosure of Invention
An object of the utility model is to provide an equipment with pronunciation awaken up function not only can be shifted to normal operating condition through voice command controlgear by the standby state is automatic, can reduce the stand-by power consumption of equipment as far as possible moreover.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a device with voice wake-up function comprises a microphone, a trigger circuit, a voice signal processing circuit, an analog switch and a processor; the microphone is used for acquiring a voice instruction of a user and converting the voice instruction into an analog voice signal; the trigger circuit is used for generating a trigger signal according to the voice signal output by the microphone; the voice signal processing circuit is used for processing the voice signal output by the microphone into voice data; the analog switch is used for controlling the microphone to be selectively communicated between the trigger circuit and the voice signal processing circuit and communicating the microphone with the trigger circuit in a default state; the processor enters a standby mode during the standby period of the equipment and keeps an interface of the processor for receiving the trigger signal to continuously work; when the processor receives the trigger signal, the semantic recognition function of the processor is started, the analog switch is controlled to switch the microphone to be communicated with the voice signal processing circuit, and the voice signal processing circuit is controlled to be switched from a dormant state to a running state; the processor receives the voice data output by the voice signal processing circuit and carries out semantic recognition, and when recognizing that the voice data is a starting instruction, the processor controls equipment to start; and when the voice data non-starting-up instruction is recognized, the semantic recognition function of the voice data is closed, the analog switch is controlled to be in a default state again, and the voice signal processing circuit is controlled to be in a dormant state again.
In some embodiments of the present application, the analog switch includes a normally open path and a normally closed path, the normally closed path is connected between the microphone and the trigger circuit, and the normally open path is connected between the microphone and the voice signal processing circuit. By adopting the circuit design, the analog switch has no power consumption during the standby period of the equipment, and the aim of reducing the standby power consumption can be further achieved.
In some embodiments of the present application, the processor generates a switch control signal to be transmitted to the analog switch during the device power-on period and during the device standby period and after receiving the trigger signal output by the trigger circuit, and controls the analog switch to connect its normally-open path.
In some embodiments of the present application, the analog switch preferably employs a single-pole double-throw switch, including a common terminal, a normally-open terminal, a normally-closed terminal, and a control terminal; the public end is connected with the microphone, the normally closed end is connected with the trigger circuit, the normally open end is connected with the voice signal processing circuit, and the control end is connected with the processor and receives the switch control signal.
In some embodiments of the present application, the voice signal processing circuit includes a voice processing chip, the voice processing chip has an enable terminal, and the voice processing chip switches from a sleep state to an operating state when the enable terminal receives an enable signal output by the processor. The voice processing chip is designed to be in a low-power-consumption dormant state instead of a power-off state during the standby period of the equipment, so that the voice processing chip does not need to be initialized when the processor controls the voice processing chip to enable operation, the time for the voice processing chip to enter a normal operation state can be shortened, and the effect of quickly responding to a voice instruction is achieved.
In some embodiments of the present application, the apparatus further comprises a power circuit for generating a standby power and a power-on power, wherein the standby power is continuously output during standby and power-on periods of the apparatus to supply power to the microphone, the analog switch, the trigger circuit, the voice signal processing circuit, and the processor; and when recognizing that the voice data is a starting instruction, the processor generates a starting signal and transmits the starting signal to the power supply circuit, and controls the power supply circuit to generate and output the starting power supply.
In some embodiments of the present application, the trigger circuit includes an amplifying circuit and a comparing circuit; the amplifying circuit is connected with the analog switch and is used for amplifying the amplitude of the voltage waveform of the voice signal output by the microphone; the comparison circuit is connected with the amplifying circuit, and compares the voltage signal output after the amplifying circuit amplifies with a reference voltage so as to generate the trigger signal.
In some embodiments of the present application, the comparison circuit preferably employs a comparator, including a non-inverting input terminal, an inverting input terminal, and an output terminal; the non-inverting input end is connected with the amplifying circuit and receives a voltage signal output by the amplifying circuit after amplification, the inverting input end is connected with the reference voltage, and the output end is connected with an interface of the processor and used for receiving the trigger signal.
In some embodiments of the present application, the reference voltage is a standby power output by the power circuit or generated by the standby power conversion.
In some embodiments of the present application, an interface through which the processor receives the trigger signal is an interrupt interface, and enters an interrupt after receiving the trigger signal to execute a wake-up process. The configuration processor responds to the wake-up operation in the interrupt state, which is beneficial to reducing the standby power consumption of the processor.
In some embodiments of the present application, the device is preferably a smart speaker.
Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model relates to a voice command that the user sent during standby of trigger circuit cooperation microphone collection equipment of low-power consumption, after receiving voice command, open the semantic recognition software in voice signal processing circuit and the treater again and discern user's pronunciation, if for the start instruction, the controlgear starts; if the power-on instruction is not received, the semantic recognition software in the voice signal processing circuit and the processor is closed again. By adopting the circuit design, the voice awakening operation of the user can be quickly responded by the equipment during the standby period, the voice signal processing circuit can enter a low-power-consumption dormant state during the standby period of the equipment, and the semantic recognition function of the processor can be closed during the standby period of the equipment, so that the standby power consumption of the equipment is greatly reduced, and the voice awakening function is realized on the premise that household appliances such as intelligent sound boxes meet the strict standby power consumption index requirements.
Other features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the invention, which is to be read in connection with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a circuit schematic block diagram of one embodiment of a voice wake-up circuit;
fig. 2 is a circuit schematic of one embodiment of a voice wake-up circuit.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1, in this embodiment, in order to implement a voice wake-up function on an electrical apparatus, on one hand, a microphone MIC is installed on an outer shell of the apparatus, and is used to collect a voice instruction sent by a user, and after performing sound-electricity conversion, an analog voice signal is formed; on the other hand, a voice signal processing circuit is arranged on an internal circuit board of the device and is used for processing voice signals output by the microphone MIC, such as filtering, interference suppression, power amplification, digital-to-analog conversion and the like, so as to form voice data and transmit the voice data to a processor CPU of the device, and semantic recognition software written in the processor CPU is used for performing semantic recognition on the voice data so as to judge whether a voice instruction sent by a user is a starting instruction.
In order to reduce the standby power consumption of the device as much as possible during the standby period of the device, the embodiment designs that the voice signal processing circuit enters a sleep mode with low power consumption during the standby period of the device, and closes the semantic recognition function of the processor CPU, so that the processor CPU can only keep some clocks and interrupt interfaces to work after entering the standby mode, thereby enabling the processor CPU to be capable of standby with extremely low power consumption.
After the above design is adopted, in order to enable the device to realize the voice wake-up function during the standby period, the present embodiment further arranges an analog switch and a trigger circuit on the internal circuit board of the device, as shown in fig. 1. The analog switch is connected between the microphone MIC and the trigger circuit and between the microphone MIC and the voice signal processing circuit and is used for controlling the microphone MIC to be selectively communicated with the trigger circuit or the voice signal processing circuit.
Specifically, during the standby period of the device, the analog switch communicates the microphone MIC with the trigger circuit, so that the microphone MIC collects and outputs a voice signal, and the voice signal is transmitted to the trigger circuit. The configuration trigger circuit generates a trigger signal when the amplitude of the voltage waveform of the voice signal reaches a certain degree, and sends the trigger signal to the CPU.
IN a preferred embodiment, the processor CPU is configured to receive the trigger signal output by the trigger circuit by using its one-way interrupt interface IN. And after receiving the trigger signal, the CPU of the processor enters an interrupt response state and executes a wakeup process.
In this embodiment, the wake-up process may specifically include the following processes:
the processor CPU starts the semantic recognition function of the processor, controls the voice signal processing circuit to be switched from a dormant state to an operating state, and controls the analog switch to communicate the microphone MIC with the voice signal processing circuit;
the microphone MIC transmits the collected and output voice signals to the voice signal processing circuit, the voice signal processing circuit is used for processing the voice signals into voice data, and then the voice data are transmitted to the CPU;
the CPU of the processor runs semantic recognition software to perform semantic recognition on the received voice data;
if the recognized voice instruction is a starting instruction, the CPU controls the equipment to be started, so that the equipment is switched from a standby state to a starting state, and the voice awakening operation of a user is responded;
if the recognized voice instruction is not a starting instruction, the processor CPU closes the semantic recognition function, controls the voice signal processing circuit to enter the dormant state again, and controls the analog switch to switch the connection path of the microphone MIC to the trigger circuit, so that the system circuit of the equipment returns to the original standby state, and the standby power consumption of the equipment can be continuously maintained at an extremely low level.
In this embodiment, the analog switch may be a single-pole double-throw switch K, as shown in fig. 2, and includes a common terminal COM, a normally open terminal NO, a normally closed terminal NC, and a control terminal S. The common terminal COM and the normally open terminal NO form a normally open path, the common terminal COM and the normally closed terminal NC form a normally closed path, and the control terminal S is connected to the processor CPU, for example, an IO port of the processor CPU, and receives a switch control signal output by the processor CPU to control on/off states of the normally open path and the normally closed path.
Specifically, the common terminal COM of the single-pole double-throw switch K is connected to the microphone MIC, the normally-open terminal NO is connected to the voice signal processing circuit, and the normally-closed terminal NC is connected to the flip-flop circuit. When the equipment is in a standby state, the CPU does not output a switch control signal, at the moment, the common end COM of the single-pole double-throw switch K is communicated with the normally closed end NC, and if a voice command of a user is collected by the microphone MIC, a voice signal output by the microphone MIC is transmitted to the trigger circuit through a normally closed path of the single-pole double-throw switch K.
When the trigger circuit generates a trigger signal according to the voice signal and transmits the trigger signal to the processor CPU, the processor CPU outputs a switch control signal to the control end S of the single-pole double-throw switch K, and controls the common end COM of the single-pole double-throw switch K to be communicated with the normally open end NO and disconnected with the normally closed end NC. At the moment, a voice signal output by the microphone MIC is transmitted to the voice signal processing circuit through a normally open path of the single-pole double-throw switch K so as to generate voice data and transmit the voice data to the CPU for semantic recognition.
If the voice command identified by the CPU is a starting command, the control device is started, and the switch control signal is continuously output during the starting period of the device, so that the single-pole double-throw switch K is controlled to keep the normally open path of the single-pole double-throw switch K connected, and the device can continuously receive and identify other voice commands of the user.
If the voice command recognized by the CPU is not a starting-up command, the CPU stops outputting the switch control signal and controls the single-pole double-throw switch K to recover a default state, namely, a state that a common end COM of the single-pole double-throw switch K is communicated with a normally closed end NC, so that the voice signal collected and output by the microphone MIC is transmitted to the trigger circuit.
In this embodiment, the trigger circuit is preferably constructed by using an amplifying circuit and a comparing circuit, as shown in fig. 2. The amplifying circuit can be connected with a normally closed end NC of the single-pole double-throw switch K through an operational amplifying chip U1, the voltage waveform of a voice signal output by a microphone MIC is subjected to amplitude amplification processing, then the voltage waveform is transmitted to a comparison circuit and compared with a reference voltage Vref, and whether a trigger signal is output or not is determined according to a comparison result.
As a preferred embodiment, the comparing circuit is preferably designed by using a comparator U2, as shown in fig. 2. Specifically, the non-inverting input terminal + of the comparator U2 may be connected to the output terminal of the operational amplifier chip U1, and receive the amplified voice signal; the inverting input of the comparator U2 is connected to the reference voltage Vref and the output of the comparator U2 is connected to the interrupt interface IN of the processor CPU.
When the user sends out the voice command in a targeted manner, the volume of the voice command is obviously improved compared with the volume of normal speaking. The microphone MIC collects the user's voice and converts it into a voltage waveform (voice signal) whose peak value is correlated with the volume. The voltage waveform is transmitted to the operational amplifier chip U1 for amplitude amplification with the same gain, and then transmitted to the comparator U2 for comparison with the reference voltage Vref. If the peak value of the amplified voltage waveform is higher than the reference voltage Vref, the voice command sent to the equipment by the user is considered. At this time, the comparator U2 outputs a high-level active trigger signal to the interrupt interface IN of the processor CPU, and controls the processor CPU to enter an interrupt and execute a wake-up procedure. On the contrary, if the peak value of the voltage waveform output by the microphone MIC after being amplified by the operational amplifier chip U1 is smaller than the reference voltage Vref, the voice or the environmental noise of the user speaking daily is considered, and the voice is not considered as a targeted voice command. At this time, the comparator outputs a low level, and the processor CPU maintains the current condition. That is, during device standby, the processor CPU remains in standby mode; during the boot of the device, the processor CPU remains in a normal operating mode.
Compared with the running power consumption of the voice signal processing circuit and the power consumption of the semantic recognition software running in the CPU, the running power consumption of the analog switch K and the trigger circuit is obviously reduced, so that the standby power consumption of the whole equipment can be effectively controlled, and the requirement of low-power-consumption standby of the equipment is met.
Of course, the trigger circuit may also be built by using other discrete components, and the embodiment is not limited to the above example.
In order that the voice signal processing circuit can quickly enter the running state after the CPU receives the trigger signal, so as to process the voice signal collected and output by the microphone MIC in time and realize quick response of the voice wake-up operation, the embodiment preferably designs that the voice signal processing circuit enters the power-on sleep state instead of the power-off state during the standby period of the device. Therefore, the CPU only needs to output a control signal to wake up the voice signal processing circuit to enter the running state from the dormant state.
In this embodiment, the voice signal processing circuit is preferably built by using the voice processing chip U3 and simple peripheral circuits (such as a filter circuit, an interference suppression circuit, an amplification circuit, etc., which are not shown in the figure, and may be implemented by using a conventional circuit design). As shown in fig. 2, the voice processing chip U3 may have an enable terminal EN connected to an IO port of the CPU of the processor for receiving an enable signal output by the CPU. The IO port may be an independent interface of the processor CPU, or may be the same interface as the IO port through which the processor CPU outputs the switch control signal for controlling the analog switch K to switch, that is, the switch control signal output by the processor CPU may be used as an enable signal, and the voice processing chip U3 is controlled to enable the operation while the analog switch K is controlled to be connected to the normally open path. By adopting the design mode, the interface resource of the CPU of the processor can be saved, and the design of the peripheral circuit of the CPU of the processor is convenient.
The voice processing chip U3 is in a dormant state before the enabling signal is not received, and the energy consumption is extremely low. When the voice processing chip U3 receives the enable signal, the low-power consumption sleep state is quickly switched to the running state, the voice signal output by the microphone MIC is received, the signal processing is carried out, the voice signal is converted into voice data, and the voice data are sent to the CPU. Since the power-on initialization process of the voice processing chip U3 is completed before the voice processing chip U3 goes to sleep, when it receives the enable signal, it can quickly go to a running state, thereby realizing quick response of voice wakeup operation.
In order to further reduce the standby power consumption of the device, the present embodiment designs a power supply circuit for supplying operating power to different electrical loads in the device, as shown in fig. 2. The power supply circuit is designed to receive Alternating Current (AC) power supply and convert the AC power supply into a standby power VSB and a startup power VCC. The standby power VSB is configured to be continuously output during standby and startup of the equipment and supplies power to the microphone MIC, the analog switch K, the trigger circuit, the voice signal processing circuit and the CPU. The reference voltage Vref required by the comparator U2 may be provided by the standby power VSB, or may be generated by the standby power VSB conversion, so as to ensure the normal power consumption of the voice wake-up circuit of the present embodiment during the standby period of the device. The power supply VCC is configured to be converted, generated and output only after the power supply circuit receives a power-on signal output by the CPU of the processor, and supplies power to a power load which needs to be powered on and operated after the equipment enters a power-on state.
By adopting the voice wake-up circuit of the embodiment, the standby power consumption of the device is extremely low, the standby current is basically about 1mA, and the voice wake-up circuit is particularly suitable for household appliances with low power consumption requirements. The circuit is applied to intelligent sound box products, and the microphone is configured in the current intelligent sound box, so that the original pickup microphone can be utilized to carry out systematic voice awakening work on the basis of not increasing the microphone, the remote voice awakening function of the intelligent sound box in an ultra-low power consumption standby mode is realized, the appearance of the product cannot be changed due to the increase of the microphone, and the conflict between the intelligent degree of the lifting equipment and the standby power consumption of the reduction equipment is effectively solved.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (10)
1. A device having voice wake-up functionality, comprising:
the microphone is used for acquiring a voice instruction of a user and converting the voice instruction into an analog voice signal;
the trigger circuit is used for generating a trigger signal according to the voice signal output by the microphone;
a voice signal processing circuit for processing a voice signal output from the microphone into voice data;
an analog switch for controlling the microphone to selectively communicate between the trigger circuit and the voice signal processing circuit and to communicate the microphone with the trigger circuit in a default state;
the processor enters a standby mode during the standby period of the equipment and keeps an interface of the processor, which receives the trigger signal, continuously working; when the processor receives the trigger signal, the semantic recognition function of the processor is started, the analog switch is controlled to switch the microphone to be communicated with the voice signal processing circuit, and the voice signal processing circuit is controlled to be switched from a dormant state to a running state; the processor receives the voice data output by the voice signal processing circuit and carries out semantic recognition, and when recognizing that the voice data is a starting instruction, the processor controls equipment to start; and when the voice data non-starting-up instruction is recognized, the semantic recognition function of the voice data is closed, the analog switch is controlled to be in a default state again, and the voice signal processing circuit is controlled to be in a dormant state again.
2. The device with voice wake-up function according to claim 1, wherein the analog switch comprises a normally open path and a normally closed path, the normally closed path being connected between the microphone and the trigger circuit, the normally open path being connected between the microphone and the voice signal processing circuit.
3. The device with voice wake-up function according to claim 2, wherein the processor generates a switch control signal to be transmitted to the analog switch to control the analog switch to connect to its normally open path after receiving the trigger signal output by the trigger circuit during the device is turned on and during the device is in standby.
4. The device with voice wake-up function according to claim 3, wherein the analog switch is a single-pole double-throw switch comprising a common terminal, a normally-open terminal, a normally-closed terminal and a control terminal; the public end is connected with the microphone, the normally closed end is connected with the trigger circuit, the normally open end is connected with the voice signal processing circuit, and the control end is connected with the processor and receives the switch control signal.
5. The device with voice wake-up function according to claim 1, wherein the voice signal processing circuit comprises a voice processing chip, the voice processing chip has an enable end, and the voice processing chip switches from a sleep state to an operation state when the enable end of the voice processing chip receives an enable signal output by the processor.
6. Device with voice wake-up functionality according to any of the claims 1 to 5, characterized in that the trigger circuit comprises:
an amplifying circuit connected to the analog switch, for amplifying a voltage waveform of the voice signal output from the microphone;
and the comparison circuit is connected with the amplifying circuit, compares the voltage signal output after the amplification of the amplifying circuit with a reference voltage and is used for generating the trigger signal.
7. The voice wake-up enabled device according to claim 6, wherein the comparison circuit comprises a comparator having a non-inverting input, an inverting input and an output; the non-inverting input end is connected with the amplifying circuit and receives a voltage signal output by the amplifying circuit after amplification, the inverting input end is connected with the reference voltage, and the output end is connected with an interface of the processor and used for receiving the trigger signal.
8. The voice wake-up enabled device according to claim 6, further comprising:
the power supply circuit is used for generating a standby power supply and a starting power supply, wherein the standby power supply is continuously output during the standby and starting periods of equipment and supplies power to the microphone, the analog switch, the trigger circuit, the voice signal processing circuit and the processor; and when recognizing that the voice data is a starting instruction, the processor generates a starting signal and transmits the starting signal to the power supply circuit, and controls the power supply circuit to generate and output the starting power supply.
9. The device with voice wake-up function according to claim 8, wherein the reference voltage is a standby power output by the power circuit or generated by the standby power conversion.
10. The device with voice wake-up function according to any one of claims 1 to 5, wherein the interface for the processor to receive the trigger signal is an interrupt interface; the equipment is an intelligent sound box.
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| CN202020935646.XU CN212675914U (en) | 2020-05-28 | 2020-05-28 | Equipment with voice awakening function |
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| CN202020935646.XU CN212675914U (en) | 2020-05-28 | 2020-05-28 | Equipment with voice awakening function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113990311A (en) * | 2021-10-15 | 2022-01-28 | 深圳市航顺芯片技术研发有限公司 | Voice acquisition device, controller, control method and voice acquisition control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113990311A (en) * | 2021-10-15 | 2022-01-28 | 深圳市航顺芯片技术研发有限公司 | Voice acquisition device, controller, control method and voice acquisition control system |
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Effective date of registration: 20220823 Address after: Room 701, Room 702, Room 703, Room 704, Building 5, No. 57, Andemen Street, Yuhuatai District, Nanjing City, Jiangsu Province, 210012 Patentee after: Nanjing GoerTek Acoustics Technology Co.,Ltd. Address before: 266104 Room 308, North Investment Street Service Center, Laoshan District, Qingdao, Shandong. Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |