WO2019134146A1

WO2019134146A1 - Voice collection device and home appliance

Info

Publication number: WO2019134146A1
Application number: PCT/CN2018/071674
Authority: WO
Inventors: 蒋壮; 张立新
Original assignee: 深圳市沃特沃德股份有限公司
Priority date: 2018-01-05
Filing date: 2018-01-05
Publication date: 2019-07-11

Abstract

Disclosed is a voice collection device and a home appliance. The device comprises a microphone assembly. The microphone assembly comprises a microphone cover and a microphone. The microphone cover is provided with a microphone hole and a sound chamber that are interconnected. The diameter of the microphone hole is smaller than that of the sound chamber. The microphone is accommodated in the sound chamber, and there is a cavity between the microphone and the microphone hole that limits a frequency resonance point of the microphone to a pitch frequency range of a male or a female voice. The voice collection device provided by an embodiment of the present invention limits the frequency resonance point of the microphone to a pitch frequency range of a male or a female voice by configuring a sound chamber for the microphone, and uses a sound chamber resonance method to amplify speech volume severalfold, while the signal and noise of other frequencies are amplified less or attenuated, so as to greatly increase the gain of a voice signal, thereby increasing voice recognition distance, control distance of a voice control device, and improving the convenience of voice control.

Description

Voice collection device and home appliance

Technical field

The present invention relates to the field of electronic technologies, and in particular, to a voice collection device and a home appliance.

Background technique

With the development of speech recognition technology, voice control (referred to as voice control) has gradually been applied to various electronic devices, especially the application of home appliances. Using voice recognition technology, users can easily control various household appliances by issuing simple voice commands. For example, when sleeping, the user can control air conditioners, fans, electric lights and other household appliances through voice commands in the bed. When the user wakes up in the morning, the user is in bed. It is possible to control home appliances such as TVs, stereos, and water heaters through voice commands, which provides great convenience for users' lives.

In a home application environment, the noise interference is usually small, and no strong noise reduction effect is required, but sufficient voice control distance is required. However, the sound control distance of current home appliances is only about five meters, and users need to be close to home appliances to perform voice control, which brings inconvenience to voice control.

Therefore, how to increase the voice control distance of home appliances is a technical problem that needs to be solved.

technical problem

The main object of the present invention is to provide a voice collection device and a home appliance, which aim to increase the voice control distance of the home appliance and improve the convenience of voice control.

Technical solution

In order to achieve the above objective, the embodiment of the present invention provides a voice collection device, where the device includes a microphone component, the microphone component includes a wheat jacket and a microphone, and the wheat jacket is provided with a microphone hole and a sound cavity that communicate with each other. The diameter of the hole is smaller than the diameter of the sound chamber, the microphone is accommodated in the sound cavity, and the microphone and the hole have a frequency resonance point of the microphone to be limited to a male or female voice The cavity within the pitch frequency range.

Optionally, the microphone is a lead microphone, and the lead microphone is inserted into the sound cavity.

Optionally, the wheat sleeve is an elastic body, and the diameter of the sound chamber is smaller than an outer diameter of the microphone.

Optionally, the microphone is a chip microphone, and the microphone component further includes a PCB board, the patch microphone is attached to the PCB board, and is pressed against the wheat sleeve of the PCB board The sound chamber port is surrounded by a seal.

Optionally, the wheat bore has a diameter of 0.8-1.5 mm.

Optionally, the depth of the wheat hole is 0.8-1.5 mm.

Optionally, the device further includes an in-phase summing amplifier and a processing unit connected to each other, the microphone component being two, respectively connected to the in-phase summing amplifier, wherein a frequency response resonance point of one microphone is at a pitch frequency of the male voice Within the range, the frequency resonance point of the other microphone component is within the pitch frequency range of the female voice.

Optionally, one of the microphones has a frequency response resonance point of 250-350 Hz, and the other microphone has a frequency response resonance point of 550-650 Hz.

Optionally, the apparatus further includes an automatic gain control circuit, the in-phase summing amplifier being coupled to the processing unit by the automatic gain control circuit.

Optionally, the apparatus further includes an automatic gain control circuit and a processing unit, and the microphone component, the automatic gain control circuit, and the processing unit are sequentially connected.

Optionally, the microphone has a frequency response resonance point of 250-350 Hz.

Optionally, the microphone has a frequency response resonance point of 550-650 Hz.

Optionally, the device further includes a processing unit, the microphone component is two, respectively connected to the processing unit, wherein a frequency resonance point of one microphone is within a range of a pitch frequency of the male voice, and a frequency resonance of the other microphone component The point is within the pitch frequency range of the female voice, the microphone of the microphone component is a digital microphone, and the processing unit is configured to perform additive summation processing on the digital signals transmitted by the two microphone components.

Optionally, the distance between the two microphone assemblies is less than 1 mm.

Optionally, the wheat sleeve is a rubber sleeve.

Optionally, the device is applied to a voice control device.

Optionally, the voice control device is a home appliance.

Optionally, the household electrical appliance is a television, an audio, an air conditioner, a curtain control system, or a lighting control system.

The embodiment of the present invention further provides a home appliance device, the home appliance device includes a voice collection device, the voice collection device includes a microphone component, the microphone component includes a wheat jacket and a microphone, and the wheat jacket is provided with a wheat connected to each other. a hole and a sound cavity, the diameter of the wheat hole is smaller than a diameter of the sound cavity, the microphone is accommodated in the sound cavity, and a frequency response of the microphone is provided between the microphone and the wheat hole The resonance point is limited to a cavity within the pitch frequency range of the male or female voice.

Beneficial effect

A voice collecting device provided by an embodiment of the present invention limits a frequency resonance point of a microphone to a range of a pitch frequency of a male voice or a female voice by setting a sound cavity for the microphone, and amplifying the voice of the human voice by using a cavity resonance method. Several times, while the signal and noise of other frequencies are amplified or attenuated, which greatly increases the gain of the speech signal, thereby increasing the speech recognition distance, thereby increasing the voice control distance of the voice control device (such as home appliances) and improving The convenience of voice control.

DRAWINGS

1 is a block diagram of a first embodiment of a voice collection device of the present invention;

Figure 2 is a schematic structural view of the microphone assembly of Figure 1;

3 is another schematic structural view of the microphone assembly of FIG. 1;

4 is a schematic block diagram of a second embodiment of a voice collection device of the present invention;

Figure 5 is a block diagram showing a third embodiment of the voice collecting device of the present invention;

6 is a schematic block diagram of a fourth embodiment of a voice collection device according to the present invention;

Figure 7 is a block diagram showing a fifth embodiment of the voice collecting device of the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The singular forms "a", "an", "the" It is to be understood that the phrase "comprise" or "an" Integers, steps, operations, components, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element. Further, "connected" or "coupled" as used herein may include either a wireless connection or a wireless coupling. The phrase "and/or" used herein includes all or any one and all combinations of one or more of the associated listed.

Those skilled in the art will appreciate that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs, unless otherwise defined. It should also be understood that terms such as those defined in a general dictionary should be understood to have meaning consistent with the meaning in the context of the prior art, and will not be idealized or excessive unless specifically defined as here. The formal meaning is explained.

The pitch frequency of human voice is mainly between 82-1100HZ, and the pitch rate of male voice is 82-523HZ. The pitch frequency of female voices ranges from 160-1100HZ. If only semantic recognition is considered, and individual differentiation recognition such as timbre is not considered, it is only necessary to amplify the sound of the frequency range of 82 to 1100 Hz, so that it is relatively simple to process the voice instruction sample library, because the number of sampling feature points can be greatly reduced. In view of this, the embodiment of the present invention limits the frequency resonance point of the microphone (the resonance point of the frequency response) to the pitch frequency range of the male or female voice by setting the sound cavity for the microphone, and the person speaks by the physical resonance method. The sound (82-1100HZ voice signal) is amplified several times, while the signal and noise of other frequencies are amplified or attenuated to increase the gain of the microphone receiver's speech sound, thereby enhancing the vocal sound by using the cavity resonance method. The frequency response increases the speech recognition distance.

The voice collection device of the embodiment of the invention is mainly applied to sound control devices such as home appliances, terminal devices, toys, and the like, such as television, audio, air conditioner, curtain control system or lighting control system. In addition, it can also be applied to other devices that need to collect voice, which is not limited by the present invention.

Referring to Figure 1, a first embodiment of a speech capture device of the present invention is presented. The device includes a microphone assembly 10 and a processing unit 20. In some embodiments, the processing unit 20 may be omitted or the processing unit 20 may be replaced with other component.

As shown in FIG. 2, in the embodiment of the present invention, the microphone assembly 10 includes a wheat jacket 11 and a microphone 12. The wheat sleeve 11 is preferably an elastic body, such as a rubber sleeve, and the microphone 12 can be an ECM (Electret Condenser Microphone) microphone 12 or a MEMS (Micro Electro Mechanical System) microphone 12, which is a microphone in the embodiment of the present invention. 12 is a lead type microphone 12.

The wheat sleeve 11 is provided with a wheat hole 121 and a sound chamber 122 which are connected to each other. The diameter of the wheat hole 121 is smaller than the diameter of the sound chamber 122, and the diameter of the wheat hole 121 is preferably 0.8-1.5 mm, and the depth is preferably 0.8-1.5 mm. The microphone 12 is inserted into the sound cavity 122, and a distance is left between the microphone 12 and the burr 121 to form a cavity having a volume capable of limiting the frequency resonance of the microphone 12 to the pitch of the male or female voice. The frequency range is correct, and the volume of the cavity is negatively correlated with the frequency resonance point of the microphone 12. That is, the smaller the cavity volume is, the higher the frequency response resonance point is, and the larger the cavity volume is, the lower the frequency response resonance point is.

The diameter of the sound chamber 122 depends on the outer diameter of the microphone 12, preferably slightly smaller than the outer diameter of the microphone 12, to achieve an interference fit when the microphone 12 is inserted into the sound chamber 122 to enhance the tightness of the open end of the sound chamber 122 to prevent leakage. . The diameter of the microphone 12 is generally 4 mm, 6 mm, 10 mm, etc., and the microphone 12 having a larger size is preferable in the case where space permits.

In the embodiment of the present invention, the wheat sleeve 11 and the microphone 12 are both cylindrical, and other shapes may be used in other embodiments, which are not limited in the present invention.

In some embodiments, the microphone 12 can also be a patch microphone 12, and the microphone assembly 10 is constructed as shown in FIG. The microphone assembly 10 further includes a printed circuit board (13). The microphone 12 is attached to the PCB board 13 and is sealed by the port of the sound chamber 122 of the wheat sleeve 11 which is pressed against the PCB board 13. To seal the open end of the sound chamber 122 to prevent leakage. Compared to the acoustic cavity 122 of the same size using the lead-type microphone 12, the volume of the internal cavity becomes larger and the frequency resonance frequency is lower.

Considering that if the electrical signal is amplified at a low frequency below 200 Hz, it is easy to generate TDMA (Time Division) generated by mobile communication radio frequency transmission. Multiple Access, Time Division Multiple Access) The interference noise is also amplified. Therefore, the embodiment of the present invention preferably limits the frequency resonance point of the microphone 12 to around 300 Hz or 600 Hz by adjusting the volume of the cavity between the microphone 12 and the burr 121 (the height of the cavity is adjusted when the diameter is constant), such as Limited to 250-350HZ or 550-650HZ.

In the embodiment of the present invention, the microphone component 10 receives the voice information, and amplifies the voice signal near the frequency of 300HZ or 600HZ through the resonance of the sound cavity 122, and transmits the voice signal to the processing unit 20. The processing unit 20 performs analog-to-digital conversion on the voice signal, converts the voice signal from the analog signal into a digital signal, performs digital noise reduction and echo cancellation processing on the converted voice signal, and then performs voice recognition on the voice signal, and the recognition result is The system preset voice command sample library performs voice command matching. When a certain voice command is matched, the corresponding signal is output through the input/output interface unit to perform corresponding operations, such as controlling the function button of the home appliance or converting to the infrared remote control output.

Since only the voice signal is amplified, the voice recognition distance is greatly increased, and the voice recognition distance is increased from the usual 5 meters to 10 to 15 meters, which improves the convenience of the home appliance remote control.

Referring to FIG. 4, a second embodiment of the voice collection device of the present invention is proposed. This embodiment adds an automatic gain control circuit 30 based on the first embodiment. The microphone component 10, the automatic gain control circuit 30, and the processing unit 20 are sequentially connection. The automatic gain control circuit 30 can control the signal gain to an appropriate range to prevent clipping distortion and reduce the recognizability when the large-distance signal is output at a short distance, thereby improving the accuracy and reliability of the speech recognition.

Referring to FIG. 5, a third embodiment of the voice collection device of the present invention is proposed. This embodiment adds a microphone assembly 10 to the first embodiment, that is, the embodiment of the present invention has two microphone assemblies 10, and two microphones. The microphone 12 in the assembly 10 is a digital microphone 12. The two microphone assemblies 10 are respectively connected to the processing unit 20, and directly output digital signals to the processing unit 20, and the processing unit 20 does not need to perform analog-to-digital conversion processing.

The smaller the distance between the two microphone assemblies 10, the better, preferably less than 1 mm, preferably close together, so that the phases of the sounds picked up by the two microphone assemblies 10 are substantially the same, which is advantageous for enhancing subsequent signal gain. Among the two microphone assemblies 10, one of the microphones 12 has a frequency resonance point in the range of the male's pitch frequency, 250-350 Hz, and the other microphone assembly 10 has a frequency resonance point in the female's pitch frequency range, such as 550-650 Hz.

The processing unit 20 performs additive summation processing on the digital signals sent by the two microphone components 10, further improving the signal gain, and increasing the speech recognition distance and the voice control distance. And the remote control sound can amplify its voice signal whether it is male or female, increase the voice recognition distance and voice control distance, and expand the scope of application.

Referring to Figure 6, a fourth embodiment of the speech collection device of the present invention is proposed. This embodiment adds a microphone assembly 10 and an in-phase summing amplifier 40 to the first embodiment, i.e., the embodiment of the present invention has two microphones. The assembly 10 and the microphone 12 of the two microphone assemblies 10 are analog microphones 12. The two microphones 12 are respectively connected to the in-phase summing amplifier 40, and the in-phase summing amplifier 40 is connected to the processing unit 20.

The in-phase summing amplifier 40 is preferably a band-pass filter amplifier of 300 to 2000 Hz, which performs in-phase addition and summation processing on the speech signals transmitted by the two microphone components 10, further improving the signal gain, increasing the speech recognition distance and the voice control distance. And the remote control sound can amplify its voice signal whether it is male or female, increase the voice recognition distance and voice control distance, and expand the scope of application.

The voice collection device of the embodiment is designed to design the frequency resonance points of the two microphones 12 to be near 300HZ and 600HZ through the sound cavity 122 of the microphone 12, and then add the output signals of the two microphones 12 to enhance the voice signal. The voice recognition distance and voice control distance of the voice control device are increased from the usual 5 meters to 10 to 15 meters at a low cost, which greatly improves the convenience of home appliance sound control.

Referring to Figure 7, a fifth embodiment of the speech collection device of the present invention is proposed. This embodiment adds an automatic gain control circuit 30 to the in-phase summing amplifier 40 via the automatic gain control circuit 30. 20. The automatic gain control circuit 30 can control the signal gain to an appropriate range to prevent clipping distortion and reduce the recognizability when the large-distance signal is output at a short distance, thereby improving the accuracy and reliability of the speech recognition.

In the embodiment of the present invention, if it is required to further increase the gain of the voice signal, the number of the microphone components 10 may be further increased, such as increasing the number of the microphone components 10 to three, four, five, and the like. However, if the voice control distance is too far, it may cause malfunction. Generally, the target voice control distance of the family is 10 to 15 meters.

The voice collection device of the embodiment of the present invention limits the frequency resonance point of the microphone 12 to the range of the pitch frequency of the male or female voice by setting the sound cavity 122 for the microphone 12, and amplifies the voice of the person by using the cavity 122 to resonate. Several times, while the signal and noise of other frequencies are amplified or attenuated, which greatly increases the gain of the speech signal, thereby increasing the speech recognition distance, thereby increasing the voice control distance of the voice control device and improving the convenience of voice control. Sex.

The present invention also provides a home appliance device, which includes a voice collection device, the voice collection device includes a microphone assembly 10, the microphone assembly 10 includes a wheat jacket 11 and a microphone 12, and the wheat jacket 11 is provided with a microphone hole 121 and a sound that are connected to each other. The cavity 122 has a diameter smaller than the diameter of the cavity 122, the microphone 12 is received in the sound cavity 122, and the microphone 12 and the hole 121 have a frequency resonance point of the microphone 12 limited to the male or female voice. Cavities within the pitch frequency range. The voice collection device described in this embodiment is a voice collection device according to the foregoing embodiment of the present invention, and details are not described herein again.

The home appliance of the embodiment of the present invention adopts the voice collection device of the foregoing embodiment, and by setting the sound cavity 122 for the microphone 12, the frequency resonance point of the microphone 12 is limited to the pitch frequency range of the male or female voice, and the sound cavity 122 is used for resonance. The way to multiply the sound of a person's speech by a few times, while the signal and noise of other frequencies are amplified less or attenuated, greatly increasing the gain of the speech signal, thereby increasing the speech recognition distance and the voice control distance, and improving the voice manipulation. Convenience.

The preferred embodiments of the present invention have been described above with reference to the drawings, and are not intended to limit the scope of the invention. A person skilled in the art can implement the invention in various variants without departing from the scope and spirit of the invention. For example, the features of one embodiment can be used in another embodiment to obtain a further embodiment. Any modifications, equivalent substitutions and improvements made within the technical concept of the invention are intended to be included within the scope of the invention.

Claims

A voice collecting device, comprising a microphone assembly, the microphone assembly comprising a wheat sleeve and a microphone, the wheat sleeve being provided with a microphone hole and a sound chamber communicating with each other, the diameter of the wheat hole being smaller than a diameter of the sound chamber, A microphone is housed in the sound cavity, and the microphone and the mic have a cavity that limits a frequency resonance point of the microphone to a range of a pitch frequency of a male or female voice.
The speech capture device of claim 1 wherein said microphone is a lead microphone and said lead microphone is inserted into said sound cavity.
The speech capture device of claim 2 wherein said cot is an elastomer having a diameter smaller than an outer diameter of said microphone.
The speech collection device according to claim 1, wherein the microphone is a chip microphone, and the microphone assembly further comprises a PCB, the patch microphone is attached to the PCB and is pressed against The chamber port of the wheat jacket on the PCB is surrounded by a seal.
The speech pickup device according to claim 1, wherein the wheat hole has a diameter of 0.8 to 1.5 mm.
The speech pickup device according to claim 1, wherein the pit has a depth of 0.8 to 1.5 mm.
The voice collection device according to claim 1, wherein said device further comprises an in-phase summing amplifier and processing unit connected to each other, said microphone component being two, respectively connected to said in-phase summing amplifier, wherein one of said microphones The frequency response resonance point is within the pitch frequency range of the male voice, and the frequency resonance point of the other microphone component is within the pitch frequency range of the female voice.
The speech collection device according to claim 7, wherein one of the microphones has a frequency response resonance point of 250-350 Hz and the other microphone has a frequency response resonance point of 550-650 Hz.
The speech capture device of claim 7, wherein said device further comprises an automatic gain control circuit, said in-phase summing amplifier being coupled to said processing unit by said automatic gain control circuit.
The speech collection device according to claim 1, wherein said device further comprises an automatic gain control circuit and a processing unit, said microphone component, said automatic gain control circuit and said processing unit being sequentially connected.
The speech pickup device of claim 10, wherein the microphone has a frequency response resonance point of 250-350 Hz.
The speech pickup device of claim 10, wherein the microphone has a frequency response resonance point of 550-650 Hz.
The voice collection device according to claim 1, wherein the device further comprises a processing unit, the microphone component being two, respectively connected to the processing unit, wherein a frequency response resonance point of one microphone is in a pitch frequency range of the male voice The frequency resonance point of the other microphone component is within the pitch frequency range of the female voice, the microphone of the microphone component is a digital microphone, and the processing unit is configured to perform additive summation processing on the digital signals transmitted by the two microphone components.
The speech collection device according to claim 13, wherein one of the microphones has a frequency resonance point of 250-350 Hz and the other microphone has a frequency response resonance point of 550-650 Hz.
The speech capture device of claim 7 wherein the distance between the two microphone assemblies is less than 1 mm.
The speech capture device of claim 3 wherein the cot is a rubber boot.
The speech capture device of claim 1 wherein said device is applied to a voice control device.
The voice collection device of claim 17, wherein the voice control device is a home appliance.
The invention according to claim 18, wherein the household electrical appliance is a television, an audio, an air conditioner, a curtain control system or a lighting control system.
A household electrical appliance comprising the speech acquisition device of claim 1.