CN112291678A - Audio equipment - Google Patents
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- CN112291678A CN112291678A CN202011036323.8A CN202011036323A CN112291678A CN 112291678 A CN112291678 A CN 112291678A CN 202011036323 A CN202011036323 A CN 202011036323A CN 112291678 A CN112291678 A CN 112291678A
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- loudspeaker
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention provides audio equipment, which comprises an earphone assembly and a microphone assembly which are arranged separately, wherein the earphone assembly and the microphone assembly are respectively provided with a control circuit comprising a wireless communication unit; the earphone component establishes a first wireless communication connection with an external device based on the wireless communication unit, and is used for communicating with the external device; the headset assembly and the microphone assembly establish a second wireless communication connection based on the wireless communication unit; the headset assembly sending link information for the first wireless communication connection to the microphone assembly based on the second wireless communication connection; the microphone assembly establishes a microphone monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent by an external device to the earphone assembly and/or sends the communication message to the external device based on the microphone monitoring link. Compared with the prior art, the invention can reduce power consumption.
Description
Technical Field
The invention relates to the technical field of audio acquisition and playing, in particular to audio equipment.
Background
Since the electronic device such as a microphone can collect ambient sound signals and is used to realize functions such as remote transmission, voice recognition or loud-speaking and broadcasting, it is widely used in various specific scenes and devices in people's production and life. Typical applications include: the voice call is realized through a microphone of the mobile phone, and the voice recognition, the access control and the like are realized through a microphone of the access control system. However, in many specific situations, the speech sound of people is rather annoying. For example, in a conference site, a library or some private place, where a quiet environment needs to be maintained, it is inconvenient to use a microphone for voice call. And in some cases, information that needs to be kept secret also needs to be protected from eavesdropping by other people. In addition, if the user talks in a noisy environment, the ambient noise often affects the quality of the conversation, so that the opposite party can not hear the user's speech. Moreover, the environmental sound is transmitted to the other party of the call, so that the other party can easily judge the environment of the user, which is not beneficial to the privacy protection of the user.
However, the microphone devices that people use in daily life are often embedded in various other electronic devices, such as a headset embedded inside a mobile phone, embedded in a headset cable, embedded in a wireless headset. Such microphones attached to other electronic devices cannot be designed solely for sound isolation. Professional microphones with sound insulation design, such as microphones with sound-absorbing covers in sound-recording studios, cannot enter people's daily life environment because they require special cables and are inconvenient to carry.
In addition, in the earphone device with a microphone which is used by people on a daily basis, the microphone generally has only a function of collecting a sound signal, that is, it does not participate in communication with an external device. For example, in a currently popular bluetooth True Wireless (TWS) headset in the market, one headset is usually used as a main device for a microphone and another headset, and is responsible for communication with an external device, such as a mobile phone. The headset used as the main device needs to forward the audio signal sent by the external device to another headset, and needs to forward the sound signals collected by the microphones on the two headsets to the external device, which causes the power consumption of the headset used as the main device to be significantly larger than that of the other headset, and the forward operation also causes the uplink and downlink communication data delay to be large.
There is therefore a need to provide an audio device with a speaker and a microphone with a more optimized performance to address at least one of the above technical drawbacks.
Disclosure of Invention
In view of the above, the present invention provides an audio device with low power consumption.
In order to achieve the above object, the present invention provides an audio device, comprising an earphone assembly and a microphone assembly separately arranged from each other, wherein a control circuit including a wireless communication unit is respectively arranged in the earphone assembly and the microphone assembly; the earphone component establishes a first wireless communication connection with an external device based on the wireless communication unit, and is used for communicating with the external device; the headset assembly and the microphone assembly establish a second wireless communication connection based on the wireless communication unit; the headset assembly sending link information for the first wireless communication connection to the microphone assembly based on the second wireless communication connection; the microphone assembly establishes a microphone monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent by an external device to the earphone assembly and/or sends the communication message to the external device based on the microphone monitoring link.
Further, the earphone component may further send clock information of an external device to the microphone component based on the second wireless communication connection, where the earphone component acquires and sends the clock information of the current external device in a time slot for sending the clock information;
and after recognizing that the received information is the clock information sent by the earphone component, the microphone component preferentially analyzes the received information, and generates a clock of the microphone monitoring link based on the clock information obtained by analysis and a preset fixed transmission time offset.
Preferably, the earphone assembly may include a left speaker and a right speaker, and the left speaker and the right speaker are of a split structure;
the left loudspeaker and the right loudspeaker are both provided with a control circuit comprising a wireless communication unit;
the left loudspeaker and the right loudspeaker establish a third wireless communication connection based on the wireless communication unit, and the third wireless communication connection is used for realizing wireless communication between the left loudspeaker and the right loudspeaker;
one of the left speaker and the right speaker establishes the first wireless communication connection with an external device and establishes the second wireless communication connection with the microphone assembly.
Preferably, one of the left speaker and the right speaker, which establishes the first wireless communication connection with the external device, sends link information of the first wireless communication connection to the other speaker based on the third wireless communication connection;
and the other loudspeaker establishes a loudspeaker monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent to the loudspeaker by an external device and/or sends the communication message to the external device based on the loudspeaker monitoring link.
Preferably, one of the left speaker and the right speaker, which establishes the first wireless communication connection with the external device, further sends clock information of the external device to the other speaker based on the third wireless communication connection, where the one speaker acquires and sends the clock information of the current external device in a time slot for sending the clock information;
and after recognizing that the received information is the clock information sent by the loudspeaker, the other loudspeaker preferentially analyzes the received information, and generates a clock for the loudspeaker to monitor the link based on the clock information obtained by analyzing and a preset fixed transmission time offset.
Further, the wireless communication units of the earphone assembly and the microphone assembly can be bluetooth communication units based on bluetooth wireless communication technology.
Preferably, the link information may include one or more of a bluetooth address of an external device, a logical address of the headset assembly or a logical address of one of the left and right speakers that establishes the first wireless communication connection with the external device, a bluetooth link key, a random number used in an encryption process, an adaptive hopping table parameter, and a phase difference;
the clock information is Bluetooth clock information;
and the microphone component or the other loudspeaker generates encryption and decryption parameters, a Bluetooth frequency hopping table and a phase difference of the monitored link based on the link information, and generates a Bluetooth clock of the monitored link based on the Bluetooth clock information.
Preferably, the microphone component monitors a link based on the microphone, and establishes an SCO or ESCO link capable of ensuring real-time transmission of voice data with an external device; the microphone assembly transmits the collected local audio signal to an external device over the SCO or ESCO link.
Further, the microphone assembly may include a microphone assembly body, and a microphone and a control circuit disposed in the microphone assembly body,
the microphone assembly is provided with a sound insulation structure which can be matched with a human face to form a closed space, and the microphone collects sound signals emitted by a user in the closed space of the sound insulation structure to generate local audio signals.
Preferably, the microphone assembly has a sound insulation structure that can cooperate with a human face to form a closed space, and specifically includes:
the microphone assembly body is a cover body with a concave cavity inside, the opening part of the concave cavity has a shape at least conforming to the characteristics of the oral cavity area of a human body, and when the opening part is covered on the oral cavity area of the human body, a closed space is formed in the concave cavity;
the opening part of the cavity is provided with a sound insulation part, or the opening part of the cavity is made of a sound insulation material; a sound insulation layer is arranged in the concave cavity;
the surface of the sound insulation layer arranged in the concave cavity is wavy and is provided with a plurality of bulges;
the microphone is arranged in the concave cavity.
Furthermore, the control circuit of the microphone assembly further comprises a signal processing unit, which is used for adjusting a frequency spectrum curve of the sound signal collected by the microphone and sending the adjusted sound signal to the outside through the wireless communication unit of the microphone assembly.
Compared with the prior art, the technical scheme provided by the invention has the advantages that after the earphone component establishes communication connection with the external equipment, the corresponding link information and the like are sent to the microphone component. The microphone assembly establishes a communication link with the external device using the link information, so that it can directly communicate with the external device to directly transmit the collected sound signal to the external device, thereby reducing power consumption of the device.
The technical solution provided by the present invention has other technical advantages, which will be described below with reference to specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a microphone assembly in an audio device according to an embodiment of the present invention;
fig. 2 is a schematic perspective exploded view of a microphone assembly according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a microphone assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an audio device according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an audio device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another structure of an audio device according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of an audio device according to another embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further exemplarily described below by the accompanying drawings and embodiments. It is clear that the described embodiments are only a part of the embodiments of the present application, and not an exhaustive list of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The audio equipment provided by the embodiment of the application comprises an earphone component and a microphone component which are arranged separately,
the earphone assembly and the microphone assembly are respectively provided with a control circuit comprising a wireless communication unit;
the earphone component establishes a first wireless communication connection with an external device based on a wireless communication unit of the earphone component so as to communicate with the external device;
the headset assembly and the microphone assembly establish a second wireless communication connection based on the wireless communication unit; the headset assembly sending link information for the first wireless communication connection to the microphone assembly based on the second wireless communication connection;
the microphone assembly establishes a microphone listening (snooping) link based on the link information of the first wireless communication connection, and receives a communication message sent to the earphone assembly by an external device and/or sends the communication message to the external device based on the microphone listening link.
In one embodiment, the earphone assembly may comprise only one speaker, i.e. a headphone of the mono-headphone type.
In another embodiment, the earphone assembly may be a headset including two speakers, and for convenience of description, the two speakers are distinguished herein by a "left speaker" and a "right speaker". It should be understood that, in practice, "left" and "right" do not uniquely define the positional relationship between the two speakers or the state in use.
Further, the two speakers can be of a head-mounted integrated structure or a split structure. The two loudspeakers may be controlled by a common control circuit or may each have separate control circuits. When the control circuits of the two loudspeakers are independent, the control circuits of the two loudspeakers respectively comprise a communication unit, the two loudspeakers can respectively realize wired or wireless communication with external equipment through the communication units of the two loudspeakers, or the two loudspeakers can also realize wired or wireless mutual communication through the communication units.
The wired communication herein may be one or more of a computer system bus, a USB interface, a micro USB interface, a mini USB interface, a Type-C interface, and a lightning interface, and may also be other known or available wired transmission methods for at least transmitting audio data.
The wireless communication here may be a wireless communication method that is known or available in the future, such as bluetooth technology, WIFI technology, NFC near field communication, and the like.
Fig. 1 is a schematic structural diagram of a microphone assembly 100 in an audio device according to an embodiment of the present invention. Wherein, the microphone assembly 100 has a sound insulation structure which can form a closed space by matching with a human face.
The microphone assembly 100 at least includes a microphone assembly body 110, and a microphone and a control circuit (not shown in fig. 1) disposed in the microphone assembly body 110.
The microphone assembly body 110 is designed as a cover with a concave cavity inside, and the overall shape of the microphone assembly body 110 can be various, such as a sphere, a column, a table, various cartoon shapes, or various shapes suitable for being held or worn, such as a hand-held microphone shape, an ear-hung mask shape, and the like.
The face of the mask that contacts at least the oral area of the face is referred to herein as the face-contacting face 120, and the cavity has a cavity therein adapted for opening and closing movements of the person's mouth and for producing sounds. The face contact surface 120 of the mask body, or at least the opening of the cavity, has a shape at least conforming to the characteristics of the oral cavity area of the human body, which may be saddle-shaped as shown in fig. 1, or may be other shapes such as bell mouth shape, oval shape, etc. Therefore, when the mask body is used, the face contact surface 120 of the mask body or at least the opening part of the concave cavity can be covered on the oral cavity area of a person, so that the mask body can be attached to the face and at least cover the oral cavity area. Of course, there are many variations of this covering method, for example, the opening of the cavity is integrated with the face contact surface 120 of the mask body, or the opening of the cavity is recessed in the face contact surface 120 of the mask body, and the attachment of the opening to the face is completed through the face contact surface 120 of the mask body; even the opening of the cavity may be designed to fit the face by other means, such as a sound guide tube, a sound-insulating cushion, a voice coil, etc., with substantially the same or similar effect as the aforementioned fitting of the opening of the cavity to the face, and thus will be referred to herein as "the opening of the cavity covers the oral area of the person and fits the face, at least covering the oral area". These variants are also intended to be within the scope of protection of the present application.
The opening part of the cavity is provided with sound insulation members such as a voice coil and a sealing ring, or the opening part of the cavity is made of sound insulation materials.
The cavity of the cavity can also adopt a sound insulation design, including but not limited to a sound insulation layer, a sound insulation cover, a sound insulation cabin, a sound insulation pad and the like. For example, a sound insulation layer made of a sound insulation material is provided on an inner surface of the cavity, or the cavity is a sound insulation cabin made of a sound insulation material.
In addition, the cover body can also be made of sound insulation material.
Separate voice coil loudspeaker voice coil, give sound insulation storehouse, puigging, sound-proof housing, sound insulating pad, the cover body etc. all can adopt soundproof material that soundproof cotton, silica gel etc. can completely cut off sound to make. For example, the sound insulation bin or the cover body is made of stainless steel or hard silica gel materials, so that the sound insulation bin or the cover body has compression-resistant and sound insulation effects; the voice coil isolating ring or the sound insulating layer is made of relatively soft sound insulating materials such as sound insulating cotton and soft silica gel, can generate various deformations to adapt to contact surfaces of different shapes, particularly can increase the tightness degree when the opening of the cavity is attached to a face, and enhances the sound insulating effect.
The microphone and the control circuit can be arranged in the cavity of the concave cavity, and the microphone is tightly combined with the cavity so as to collect sound signals in the cavity of the concave cavity.
The cavity can be internally provided with various existing or future silencing materials, silencing structures or silencing devices such as a silencing layer, a silencing pipe, a silencing bin and the like. For example, the inner surface of the cavity is covered with at least one layer of sound-deadening material, so that sound in the cavity can be absorbed by the sound-deadening material, and thus, echo caused by multiple reflections of the sound in the cavity can be reduced.
As a preferred embodiment, the microphone assembly body or the sound insulation member can be made of an environment-friendly material, such as food-grade silica gel, nanofiber, and the like.
Fig. 2 shows a preferred embodiment of the microphone assembly 100 according to the embodiment of the present invention. As shown in fig. 2, the microphone assembly body 110 is provided with a voice coil 210, an acoustic isolation layer 230, and a microphone 240, and fig. 2 is also illustrated in a perspective view for the purpose of explaining the internal structure of the cavity 250.
A cavity 250 is formed in the microphone assembly body 110 by recessing the top surface of the microphone assembly body inwards, and the microphone 240 is disposed in the cavity 250. Preferably, the microphone assembly 240 is disposed on a sidewall of the cavity. As another preferred mode, at least one through hole 260 is further formed in the cavity 250 of the microphone assembly, and air flow can be circulated between the inside and the outside of the cavity through the through hole 260.
The soundproof layer 230 made of soundproof material or noise deadening material is disposed in the concave cavity 250. The soundproof layer 230 may be designed to have soundproof effect, such as soundproof cotton having a shape matching with the cavity of the cavity, a soundproof pad filling the cavity of the cavity 250, or a soundproof pad covering the inner wall of the cavity 250, and as shown in fig. 2, the surface of the soundproof layer 230 is designed to have a wave shape and a plurality of protrusions, so that the soundproof effect can be enhanced by the protrusions.
The voice coil 210 is disposed at the opening of the top surface of the cavity 250, and the voice coil 210 has a shape conforming to the characteristics of the oral cavity area of the human body and can be better attached to the human face when being covered on the oral cavity. Optionally, a sealing ring 220 may be provided, such that the sound-insulating effect between the sound-insulating ring 210 and the cavity is further enhanced by the sealing ring 220.
When the voice isolation ring is used, the voice isolation ring 210 covers the mouth, at the moment, the sound isolation ring 210 and the cavity 250 form a closed space, so that the voice isolation ring is suitable for the free opening and closing of the mouth of a person, speaking or singing, meanwhile, the microphone 240 collects sound waves, and the sound isolation layer 230 plays a role in isolating sound wave transmission, absorbing redundant sound waves and eliminating echo. Accordingly, the sound insulation structure of the cavity 250 is designed to form a good sound transmission isolation environment in the cavity of the cavity when the microphone assembly is used, and internal sound transmission and external sound transmission are blocked. This will create a very clean and private sound producing environment for the user. For example, when a user uses the microphone assembly of the embodiment to communicate with a far-end, the sound of the user is not or rarely leaked out of the cavity and can not be heard by people around the user, so that the user does not interfere with other people and has good communication confidentiality; meanwhile, the sound of the environment where the remote conversation party is located cannot be transmitted into the cavity, the sound collected by the microphone 120 is only the voice sent by the user, and the sound heard by the remote conversation party is very clean, so that the conversation cannot be interfered by the surrounding environment, the environment where the user is located cannot be judged because the remote conversation party cannot know the environment sound, and the privacy of the user is protected.
As shown in fig. 3, the control circuit of the microphone assembly may include a control unit, a wireless communication unit, and a power supply unit. The microphone is electrically connected with the control circuit.
The control unit is used for realizing central control of the microphone assembly, including but not limited to controlling the microphone to collect external audio signals, power management and the like.
The wireless communication unit is used for data interaction between the microphone assembly and the outside, including but not limited to transmission of audio signals collected by the microphone.
In a specific embodiment, a wired communication interface may be further disposed in the microphone assembly, so that the microphone assembly may transmit the collected sound signal to an external device or an earphone assembly through a wired communication manner. For example, the microphone assembly can be plugged into a computer through the wired communication interface, so that interference-free high-quality computer recording can be realized. The microphone assembly 100 shown in fig. 1 is additionally provided with a wired communication interface, wherein the microphone assembly 100 further includes an audio output dedicated connector 130 electrically connected to the control circuit through a cable 140, which may be a 3.5mm two-core audio output connector.
The power supply unit is used for providing a power supply required by the microphone assembly during working, can be a power supply circuit module powered by a button battery or a rechargeable battery, can also be a power supply management module for supplying power to the device through an external input power supply, and can also be a circuit module for automatically taking power based on a wired communication interface additionally arranged in the microphone assembly.
In a preferred embodiment, the cover body is further provided with a sensing unit (not shown in the drawings) electrically connected to the control circuit, the sensing unit is configured to detect a use state of the microphone assembly, and generate a first sensing signal when detecting that the microphone assembly is used (if it is detected that light inside the cavity is dark, temperature on the surface of the cavity is increased, and the like, the microphone assembly is considered to be worn and should be in a use state), and the control circuit turns on the microphone when detecting the first sensing signal, so that the microphone enters a working state of collecting audio information; when the microphone assembly is detected to be idle (if the microphone assembly is detected to be taken off and should be stopped to use if the light inside the concave cavity is bright, the surface temperature of the concave cavity is reduced and the like are detected), a second sensing signal is generated, and when the control circuit detects the second sensing signal, the microphone is closed, so that the power consumption is reduced, and the standby time of the microphone assembly is prolonged.
The sensing element may be implemented using any of a variety of existing or future sensing technologies that can detect temperature changes, light changes, sound wave changes, pressure changes, position changes, etc. received by the microphone assembly, such as one or more of an infrared sensor, a pressure sensor, and a vibration sensor, which may be disposed at any suitable location on the housing, such as within the cavity of the cavity, within the housing, etc., depending on the type of sensing element used.
Considering that when a sound signal is transmitted in a closed space, the sound signal may be distorted or reverberated due to the structure and material of the cavity, and the quality of the sound collected by the microphone is affected, in another preferred embodiment, the control circuit may further include a signal processing unit, configured to perform a spectral curve adjustment on the sound signal collected by the microphone, eliminate reverberation, and obtain a sound signal when the sound signal is close to an open environment, where the control unit controls the communication unit to output the sound signal processed by the signal unit. The signal processing unit may be specifically configured to perform various known or future-adoptable audio processing methods including EQ (equalization) processing, reverberation cancellation, and the like.
The audio equipment that this embodiment provided, when the sound-proof structure of design microphone subassembly, adopt the spectral curve adjustment of signal processing unit to user's sound signal, not only have the advantage that physics is syllable-dividing, can also effectively eliminate the distortion of sound wave in narrow and small and confined space, distortion and unusual reverberation, and obtain the sound effect that is close to in the open environment, improve sound collection quality. Therefore, compared with the prior art, the audio equipment of the embodiment can provide user experience with better sound insulation effect and better sound quality, and can be suitable for various application scenes, so that people can freely speak and sing in places such as conference rooms, classrooms, concert halls, stadiums, libraries, churches, buses, high-speed rails, clubs, bars and the like, or in noisy morning and at silent midnight, and people do not worry about disturbing others, or worry about that the sound of the other party is not heard or is hard to hear the sound transmitted to the other party by the people, and privacy leakage is not worried.
Fig. 4 shows an audio device having a separable earphone and microphone structure, which includes an earphone assembly 400 and a microphone assembly 100 that are separately disposed from each other according to an embodiment of the present invention.
The microphone assembly 100 may be the same or similar acoustically isolatable microphone assembly as that shown in fig. 1-3. Such as where the microphone assembly 100 may not have the cable 140 and the audio output dedicated connector 130. Obviously, the microphone assembly 100 may also be a microphone assembly without sound insulation, i.e. without sound insulation structure as shown in fig. 1 or fig. 2. Such as it may be designed as a stand-alone miniature microphone.
The earphone assembly 400 may be a headphone, an ear phone, an in-ear phone, or the like, and has a left speaker 410, a right speaker 420, a connecting portion 430 for connecting the left and right speakers, and a control circuit (not shown).
The connection 430 may be designed as a headset holder, a headband, a soft band, a connection cable, etc., in which a wire is disposed. Speaker units are respectively disposed in the left speaker 410 and the right speaker 420. The loudspeaker unit is electrically connected with the control circuit through a lead.
As an alternative embodiment, the earphone assembly may further be provided with a wired communication interface for implementing wired communication with an external device or the microphone assembly. As exemplarily shown in fig. 4, the wired communication interface is a microphone jack micin 440, which can be used to plug the audio output dedicated connector 130 of the microphone assembly 100 shown in fig. 1. Obviously, the wired communication interface may also be implemented by other wired communication interfaces such as a USB interface, a microUSB interface, a lightning interface, and the like.
As shown in fig. 5, the control circuit of the headset assembly 400 includes a wireless communication unit, a micro-processing unit, and a power supply unit.
The micro-processing unit is used for implementing central control of the headset assembly 400, including but not limited to communication control, data processing, play control, and the like.
The wireless communication unit is used for data interaction between the headset assembly 400 and the outside, including but not limited to receiving a far-end audio signal from an external device, receiving a local audio signal collected by a microphone from the microphone assembly 100, sending a communication confirmation message or a control instruction to the external device or the microphone assembly 100, and the like.
The headset assembly 400 establishes a first wireless communication connection with an external device through a wireless communication unit based on a wireless communication protocol to enable communication with the external device. Thus, the earphone assembly 400 can receive far-end audio signals from an external device, and the micro-processing unit is used for processing the far-end audio signals and then playing the far-end audio signals through the speaker units of the left speaker 410 and/or the right speaker 420.
The headset assembly 400 also establishes a second wireless communication connection with the microphone assembly via the wireless communication unit based on a wireless communication protocol to enable wireless communication with the microphone assembly. The headset assembly 400 may thereby transmit link information of the first wireless communication connection to the microphone assembly, and/or the headset assembly 400 may receive local audio signals from the microphone assembly.
The microphone assembly establishes a microphone monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent by an external device to the earphone assembly and/or sends the communication message to the external device based on the microphone monitoring link. The communication message may include a local audio signal collected and transmitted by the microphone assembly or other communication data that needs to be transmitted during the communication process.
Further, the headset assembly also sends clock information of an external device to the microphone assembly based on the second wireless communication connection. When the earphone in the prior art performs wireless communication, information to be transmitted is generally buffered in a FIFO buffer based on a first-in first-out mechanism, for example, and then sequentially transmitted. Correspondingly, after receiving the information, the receiving end also caches the information and processes the information in sequence according to the receiving time. This mechanism for transmitting and receiving information increases the delay when used to transmit clock information, and reduces the real-time performance of the clock information. Therefore, in the embodiment of the present invention, the headset assembly acquires and transmits the clock information of the current external device in the time slot for transmitting the clock information, thereby ensuring that the clock information transmitted by the headset assembly is the latest clock information of the external device. Correspondingly, after recognizing that the received information is the clock information sent by the earphone component, the microphone component preferentially analyzes the received information, and generates a clock of the microphone monitoring link based on the clock information obtained by analyzing and a preset fixed transmission time offset. As used herein, the "preferential parsing" may be to set the parsing priority of a packet containing clock information to a higher priority, or even the highest priority, and once the microphone component recognizes that the received packet contains clock information, the microphone component will preferentially parse the packet without processing the packet according to the mechanism of buffering and parsing in the order of receiving time in the prior art. Therefore, the generated clock of the microphone monitoring link is ensured to be synchronous with the clock of the external equipment, so that the microphone monitoring link can be used as a shadow link of a communication link between the earphone component and the external equipment, a communication message sent to the earphone component by the external equipment can be normally received, and even if necessary, the message is sent to the earphone component instead of the earphone component.
The fixed transmission time offset may be preset according to a fixed transmission delay performance when the audio device performs wireless communication with an external device.
The wireless communication protocol described herein may be a standard wireless protocol, or may be a proprietary wireless protocol or a proprietary wireless protocol. The term "standard wireless protocol" as used herein refers to any open or publicly available wireless protocol, including any wireless protocol provided or promulgated by a standard agency or organization, such as the Bluetooth specification, Wi-Fi, and the like. The term "proprietary wireless protocol" or "private wireless protocol" as used herein refers to any wireless communication protocol other than the standard wireless protocol.
The external device may be a mobile phone, a computer, a television, a wireless sound box, a car sound box, a game machine, or other media players, handheld computers, game devices, televisions, or audio receiving devices. The electronic equipment can be electronic equipment provided in the form of an independent device, such as a mobile phone, a computer and the like, and can also be electronic equipment provided as an embedded system, such as a vehicle-mounted sound box, a home theater and the like. These are merely illustrative examples, and the present invention is not particularly limited thereto.
As shown in fig. 5, the speaker units of the left and right speakers are used for playing audio signals under the control of the microprocessor unit. Such as playing the local audio signal or the far-end audio signal at the same time, playing the mixed local audio signal and far-end audio signal at the same time, playing the local audio signal and far-end audio signal separately, and so on.
The power supply unit of the earphone assembly 400 and the microphone assembly 100 may be a power supply circuit module powered by a button battery or a rechargeable battery, a power supply management module powered by an external input power supply, or a circuit module capable of automatically taking power based on a wired communication interface. The two may be the same or different.
Embodiments of the present invention will be described in detail below with reference to a typical application scenario.
As shown in fig. 6, in the present exemplary application scenario, the audio device provided in this embodiment can be used as a bluetooth True Wireless (TWS) headset with a sound insulation function, that is, where the left speaker and the right speaker adopt a split structure.
As shown in fig. 7, a control circuit including a wireless communication unit is provided in each of the left and right speakers. And the left loudspeaker and the right loudspeaker establish a third wireless communication connection based on the wireless communication unit, so as to realize the wireless communication between the left loudspeaker and the right loudspeaker. The left loudspeaker and the right loudspeaker are also provided with loudspeaker units, and the control circuit further comprises a micro-processing unit and a power supply unit. The basic functions of the above-mentioned embodiments can be described with reference to fig. 5, and are not described herein again.
The earphone assembly is in communication with an external device and a microphone assembly, specifically, one of the left speaker and the right speaker establishes the first wireless communication connection with the external device based on a wireless communication unit of the earphone assembly, and establishes the second wireless communication connection with the microphone assembly.
One of the left speaker and the right speaker, which establishes the first wireless communication connection with an external device, transmits link information of the first wireless communication connection to the other speaker based on the third wireless communication connection; and the other loudspeaker establishes a loudspeaker monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent to the loudspeaker by an external device and/or sends the communication message to the external device based on the loudspeaker monitoring link.
For convenience of description, the first wireless communication connection will be established with the left speaker and the external device, and the second wireless communication connection will be established with the microphone assembly.
In this exemplary application scenario, the process of networking the headset assembly and the microphone assembly with the external device based on the bluetooth wireless communication protocol after the headset assembly and the microphone assembly are turned on is as follows:
(1) the microphone component and the left speaker establish a second wireless communication connection, specifically, establish a link layer connection based on a bluetooth protocol and an A2DP (Advanced Audio Distribution Profile bluetooth Audio transmission model specification) connection, an HFP (handles-free Profile Hands-free specification) connection and an AVRCP (Audio/video remote Control Profile) connection of an application layer;
(2) the right loudspeaker and the left loudspeaker are connected in a third wireless communication mode, specifically, a link layer connection based on a Bluetooth protocol and an A2DP connection, an HFP connection and an AVRCP connection of an application layer are established;
(3) establishing a first wireless communication connection between the left speaker and the external device, specifically, if the left speaker records the external device information, establishing the first wireless communication connection to connect the external device, such as the smart phone shown in fig. 6; if the left loudspeaker does not record the information of the external equipment, the left loudspeaker enters a pairable state, an indicator lamp flickers, and the external equipment is prompted to search and pair to connect the left loudspeaker and the right loudspeaker; establishing a link layer connection based on a Bluetooth protocol and an A2DP connection, an HFP connection and an AVRCP connection of an application layer on the assumption that the left speaker is successfully connected with the external device;
after the components are successfully connected, a Bluetooth scatter network (scatter network) is formed, wherein in the scatter network, the external device is in a Master role, and the slave role is a left loudspeaker; the left loudspeaker is in the role of Slave of the external equipment and is also in the role of Master of the microphone assembly and the right loudspeaker; the microphone assembly and the right loudspeaker are in the role of Slave of the left loudspeaker; thus, the scatternet consists of two bluetooth piconets, referred to as Piconet1 and Piconet 2; the left speaker maintains three bluetooth connections for both Piconet1 and Piconet 2. In this embodiment, the flag for establishing the bluetooth connection is that an AVDTP (Audio/Video Distribution Transport Protocol, transmission specification for Audio/Video Distribution) channel is in an OPEN state.
Based on the network architecture, the audio equipment can realize at least three audio interaction scenes with external equipment:
scene one: playing far-end audio
(1) The user can trigger the playing operation from the external device, or the earphone component or the microphone component; if the trigger is triggered on the earphone component or the microphone component, the playing operation is forwarded to the external device through the signaling of the AVRCP protocol;
(2) the Bluetooth protocol stack of the external equipment reports the playing operation to a music player application installed in the external equipment, and the music player application starts to send a far-end audio signal to a Bluetooth channel of the external equipment through streaming; meanwhile, the Bluetooth protocol stack of the external equipment sends a play START command AVDTP _ START _ CMD, and the AVDTP channel is changed into a Streaming state;
(3) after receiving the AVDTP _ START _ CMD command, the left loudspeaker responds to the confirmation of receiving the AVDTP _ START _ RSP command; meanwhile, the left loudspeaker sends link information of the first wireless communication connection to the right loudspeaker through an ACL link of the third wireless communication connection, and the link information can comprise one or more of a Bluetooth address of the external equipment, a logical address of the left loudspeaker, a Bluetooth link key, a random number used in an encryption process, an adaptive frequency hopping table parameter (AFH map) and a phase difference (intraburst offset); further, the left speaker transmits bluetooth clock information (BT clock) of the external device to the right speaker through the synchronization link of the third wireless communication connection to ensure that the transmitted data arrives at the right speaker at fixed time intervals. In general, to implement master-slave device synchronization, the left speaker is used as a slave role of the external device, and after the first wireless communication connection is established, the bluetooth clock of the external device can be obtained, and the local bluetooth clock of the left speaker is set to be synchronized with the bluetooth clock of the external device. Therefore, the left loudspeaker can acquire the currently received Bluetooth clock of the external device or acquire local Bluetooth clock information in the time slot for transmitting the clock information, so as to be used as the clock information of the current external device for transmission;
(4) the right loudspeaker establishes a loudspeaker monitoring link based on the information, and the link takes the external equipment as the Master equipment of the right loudspeaker; the right loudspeaker generates a Bluetooth clock of a loudspeaker monitoring link based on Bluetooth clock information of external equipment and a preset fixed transmission time offset, and generates an encryption and decryption parameter, a Bluetooth frequency hopping table, a phase difference and the like according to link information of first wireless communication connection; the loudspeaker monitoring link can normally receive the message sent by the external equipment to the left loudspeaker, and can also replace the left loudspeaker to send the message to the external equipment if necessary, for example, when the left loudspeaker cannot communicate with the external equipment due to low electric quantity or communication failure. Therefore, the right loudspeaker can normally receive the music message of the external equipment without the participation of the left loudspeaker, and the effect that the left loudspeaker and the right loudspeaker synchronously play the far-end audio content sent by the external equipment is achieved.
In a preferred embodiment, to compensate for the situation where packet loss causes a stuck, the left speaker and the right speaker also interact through the third wireless communication connection: when the left loudspeaker loses the music message, a request is sent to the right loudspeaker, and the right loudspeaker forwards the lost message to the left loudspeaker; and vice versa.
In a preferred embodiment, to achieve better synchronized playback, the left speaker and the right speaker interact via the third wireless communication connection: the left loudspeaker sends a time point for playing a certain frame of music data to the right loudspeaker; the left loudspeaker and the right loudspeaker are synchronized to the time point through the same Bluetooth clock to play, and therefore the good synchronous playing effect is achieved.
Scene two: capturing and outputting local audio
(1) A user triggers a local audio input operation from an external device, or a headset component, or a microphone component; or when the sensing unit of the microphone assembly detects that the microphone assembly is used, the local audio input operation is triggered;
(2) the left loudspeaker sends link information of the first wireless communication connection to the microphone assembly through an ACL link of the second wireless communication connection, wherein the link information can comprise one or more of a Bluetooth address of an external device, a logical address of the left loudspeaker, a Bluetooth link key, a random number used in an encryption process, an adaptive frequency hopping table parameter (AFH map) and a phase difference (intraburst offset); further, the left speaker transmits bluetooth clock information (BT clock) of the external device to the microphone assembly over the synchronous link of the second wireless communication connection to ensure that the transmitted data arrives at the microphone assembly at fixed time intervals.
(3) The microphone component establishes a microphone monitoring link based on the information, and the link takes the external equipment as the Master equipment of the microphone component; the microphone assembly generates a Bluetooth clock of a microphone monitoring link based on Bluetooth clock information of external equipment and a preset fixed transmission time offset, and generates an encryption and decryption parameter, a Bluetooth frequency hopping table and a phase difference according to link information of first wireless communication connection; thus, the microphone assembly can normally receive the message sent by the external device to the left loudspeaker or send the message to the external device.
(4) The microphone component sends a message ESCO _ LINK _ REQ requesting to establish an ESCO (Extended Synchronous Connection-Oriented, Extended Connection-Oriented Synchronous logic transport) or SCO (Synchronous Connection-Oriented, Connection-Oriented) Synchronous LINK to the external device based on the microphone listening LINK; based on the microphone monitoring link, an SCO or ESCO link which can ensure the real-time transmission of voice data is established between the external equipment and the microphone component; on the link, the microphone assembly sends the collected local audio signals to the external equipment, and the function of voice collection and uploading is achieved without forwarding of the left loudspeaker.
In a preferred embodiment, the microphone assembly sends an ESCO _ LINK _ REQ message to the left speaker based on the second wireless communication connection; establishing an SCO or ESCO link between the left speaker and the microphone based on the second wireless communication connection; on the link, the microphone copies a copy of the local audio signal sent to the external device and sends the copy to the left loudspeaker, so that the left loudspeaker can play the voice of the user to the user for listening, and the problem that the user cannot normally monitor the sound due to the fact that the voice is shielded by the microphone with the sound insulation function in the embodiment of the invention is solved.
Scene three, two-way voice call
(1) The user triggers the two-way voice call operation from the external equipment, the earphone component or the microphone component;
(2) the left loudspeaker forwards the call operation to the external device through signaling of HFP protocol;
(3) the Bluetooth protocol stack of the external device establishes a Bluetooth bidirectional voice channel of bidirectional voice call application (such as telephone application, live broadcast application and the like);
(4) the left loudspeaker sends the link information of the first wireless communication connection to the right loudspeaker through an ACL link of the Bluetooth connection 3, and sends Bluetooth clock information (BT clock) of the external equipment to the right loudspeaker through a synchronous link of the third wireless communication connection;
the right loudspeaker establishes a loudspeaker monitoring link based on the information, and the link takes the external equipment as the Master equipment of the right loudspeaker; and the right loudspeaker generates a Bluetooth clock for the loudspeaker to monitor the link based on the Bluetooth clock information of the external equipment and a preset fixed transmission time offset, and generates an encryption and decryption parameter, a Bluetooth frequency hopping table, a phase difference and the like according to the link information of the external equipment.
The process is the same as the related content of the scenario one, and is not described herein again.
(5) The left loudspeaker sends the link information of the first wireless communication connection to the microphone assembly through an ACL link of a second wireless communication connection, and sends Bluetooth clock information (BT clock) of the external equipment to the microphone assembly through a synchronous link of the second wireless communication connection; the microphone component establishes a microphone monitoring link based on the information, and the link takes the external equipment as the Master equipment of the microphone component; the microphone generates a Bluetooth clock of a microphone monitoring link based on Bluetooth clock information of external equipment and a preset fixed transmission time offset, and generates an encryption and decryption parameter, a Bluetooth frequency hopping table, a phase difference and the like according to link information of first wireless communication connection;
the process is the same as the related content of the second scenario, and is not repeated here.
(6) The left speaker sends an ESCO _ LINK _ REQ message to the external device based on the first wireless communication connection; establishing an SCO or ESCO link between the external device and the left speaker based on the first wireless communication connection; the bidirectional Bluetooth voice channel of the external equipment is communicated with the SCO or ESCO link; on the SCO or ESCO link, the voice data of the external equipment is transmitted to the left loudspeaker to be played; because the loudspeaker monitoring link is a shadow link of the first wireless communication connection, the right loudspeaker also normally receives the voice data on the SCO or ESCO link and normally plays the voice data; thus, the effect of simultaneous playing of the left loudspeaker and the right loudspeaker is achieved; because the microphone listening link is a shadow link of the first wireless communication connection, the microphone assembly can also normally transmit voice upstream over the SCO or ESCO link to the external device;
(7) the microphone component sends an ESCO _ LINK _ REQ message to the left speaker based on the second wireless communication connection; establishing an SCO or ESCO link between the left speaker and the microphone based on the second wireless communication connection; over this link, the microphone assembly sends a copy of the local audio signal sent to the external device to the left speaker so that the left speaker can play the user's own voice for the user to listen to.
Therefore, in the scene, the right loudspeaker and the microphone assembly can be directly communicated with the external equipment through the established monitoring link, and compared with the prior art, the audio equipment provided by the embodiment of the invention has no special requirement on the compatibility of the external equipment, and the scheme has good adaptability; the uplink and downlink delay is low and is the same as the delay of equipment directly connected with external equipment; and the operation that voice data messages need to be forwarded by the left loudspeaker in an uplink and downlink manner in the traditional scheme is saved, and the power consumption is saved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. An audio device, characterized by: comprises an earphone component and a microphone component which are arranged separately from each other,
the earphone assembly and the microphone assembly are respectively provided with a control circuit comprising a wireless communication unit;
the earphone component establishes a first wireless communication connection with an external device based on the wireless communication unit, and is used for communicating with the external device;
the headset assembly and the microphone assembly establish a second wireless communication connection based on the wireless communication unit;
the headset assembly sending link information for the first wireless communication connection to the microphone assembly based on the second wireless communication connection;
the microphone assembly establishes a microphone monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent by an external device to the earphone assembly and/or sends the communication message to the external device based on the microphone monitoring link.
2. The audio device of claim 1, wherein: the earphone component is used for sending clock information of external equipment to the microphone component based on the second wireless communication connection, wherein the earphone component acquires and sends the clock information of the current external equipment in a time slot for sending the clock information;
and after recognizing that the received information is the clock information sent by the earphone component, the microphone component preferentially analyzes the received information, and generates a clock of the microphone monitoring link based on the clock information obtained by analysis and a preset fixed transmission time offset.
3. The audio device of claim 1, wherein: the earphone component also comprises a left loudspeaker and a right loudspeaker which adopt a split structure;
the left loudspeaker and the right loudspeaker are both provided with a control circuit comprising a wireless communication unit;
the left loudspeaker and the right loudspeaker establish a third wireless communication connection based on the wireless communication unit, and the third wireless communication connection is used for realizing wireless communication between the left loudspeaker and the right loudspeaker;
one of the left speaker and the right speaker establishes the first wireless communication connection with an external device and establishes the second wireless communication connection with the microphone assembly.
4. The audio device of claim 3, wherein: one of the left speaker and the right speaker, which establishes the first wireless communication connection with an external device, transmits link information of the first wireless communication connection to the other speaker based on the third wireless communication connection;
and the other loudspeaker establishes a loudspeaker monitoring link based on the link information of the first wireless communication connection, and receives a communication message sent to the loudspeaker by an external device and/or sends the communication message to the external device based on the loudspeaker monitoring link.
5. The audio device of claim 4, wherein: one of the left speaker and the right speaker, which establishes the first wireless communication connection with the external device, further sends clock information of the external device to the other speaker based on the third wireless communication connection, wherein the one speaker acquires and sends the clock information of the current external device in a time slot for sending the clock information;
and after recognizing that the received information is the clock information sent by the loudspeaker, the other loudspeaker preferentially analyzes the received information, and generates a clock for the loudspeaker to monitor the link based on the clock information obtained by analyzing and a preset fixed transmission time offset.
6. Audio device according to one of claims 1 to 5, characterized in that: the wireless communication units of the earphone assembly and the microphone assembly are both Bluetooth communication units based on Bluetooth wireless communication technology.
7. The audio device as in claim 6, wherein: the link information comprises one or more of a Bluetooth address of an external device, a logical address of the earphone assembly or a logical address of one of the left and right speakers which establishes the first wireless communication connection with the external device, a Bluetooth link key, a random number used in an encryption process, an adaptive frequency hopping table parameter, and a phase difference;
the clock information is Bluetooth clock information;
and the microphone component or the other loudspeaker generates encryption and decryption parameters, a Bluetooth frequency hopping table and a phase difference of the monitored link based on the link information, and generates a Bluetooth clock of the monitored link based on the Bluetooth clock information.
8. The audio device as in claim 7, wherein: the microphone component monitors a link based on a microphone, and establishes an SCO or ESCO link capable of ensuring real-time transmission of voice data with external equipment; the microphone assembly transmits the collected local audio signal to an external device over the SCO or ESCO link.
9. The audio device of claim 1, wherein: the microphone assembly comprises a microphone assembly body, a microphone and a control circuit, wherein the microphone and the control circuit are arranged in the microphone assembly body,
the microphone assembly is provided with a sound insulation structure which can be matched with a human face to form a closed space, and the microphone collects sound signals emitted by a user in the closed space of the sound insulation structure to generate local audio signals.
10. The audio device as recited in claim 9, wherein: microphone subassembly has the sound-proof structure that can cooperate people's face to form the enclosure, specifically includes:
the microphone assembly body is a cover body with a concave cavity inside, the opening part of the concave cavity has a shape at least conforming to the characteristics of the oral cavity area of a human body, and when the opening part is covered on the oral cavity area of the human body, a closed space is formed in the concave cavity;
the opening part of the cavity is provided with a sound insulation part, or the opening part of the cavity is made of a sound insulation material; a sound insulation layer is arranged in the concave cavity;
the surface of the sound insulation layer arranged in the concave cavity is wavy and is provided with a plurality of bulges;
the microphone is arranged in the concave cavity.
11. The audio device of claim 1, wherein: the control circuit of the microphone assembly also comprises a signal processing unit which is used for adjusting the frequency spectrum curve of the sound signal collected by the microphone and sending the adjusted sound signal to the outside through the wireless communication unit of the microphone assembly.
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Also Published As
| Publication number | Publication date |
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| CN214429678U (en) | 2021-10-19 |
| CN112291678B (en) | 2023-11-21 |
| CN213938270U (en) | 2021-08-10 |
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