CN210694338U - Annular microphone array external audio input device with wireless connection - Google Patents
Annular microphone array external audio input device with wireless connection Download PDFInfo
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- CN210694338U CN210694338U CN201922469545.8U CN201922469545U CN210694338U CN 210694338 U CN210694338 U CN 210694338U CN 201922469545 U CN201922469545 U CN 201922469545U CN 210694338 U CN210694338 U CN 210694338U
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Abstract
The utility model discloses a circular ring-shaped microphone array external audio input device with wireless connection, which relates to the field of external audio input devices and comprises a CPU main circuit board, a microphone array, a PCB antenna and a wireless connection module; the microphone circuit board is connected with the CPU main circuit board; the microphone array comprises a plurality of microphones which are arranged at equal intervals to form a circular array, and the microphone array is connected with the CPU main circuit board through the microphone circuit board; the PCB antenna is connected with the CPU main circuit board; the wireless connection module is connected with the PCB antenna. The utility model has the advantages that: the audio acquisition effect of the electronic equipment can be enhanced without changing the existing hardware structure of the electronic equipment, and the audio acquisition device has a wireless connection function, a wide orientation range and high sound source positioning precision.
Description
Technical Field
The utility model relates to an external audio input equipment field especially relates to a take wireless connection's external audio input equipment of ring shape microphone array.
Background
With the rapid development of voice communication technology, in an era where intelligent electronic devices such as intelligent vehicles, intelligent homes, robots and wearable devices are becoming hot, voice interaction becomes the first choice for human-computer interaction due to convenience. Because the audio input device of the intelligent electronic device has certain limitations, the intelligent electronic device cannot be effectively applied to different scenes, such as live video scenes, the microphone of the mobile phone does not have the capability of resisting outdoor environment noise, the microphone of the computer cannot effectively eliminate indoor reverberation, and the like, so that the watching experience of a viewer can be seriously influenced. In the prior art, more microphones are added to electronic equipment, and a microphone array is formed in the electronic equipment, which requires to change the hardware structure of the electronic equipment, so that the electronic equipment meets the structural constraint condition of the microphone array, and the research and development cost of the electronic equipment is obviously increased. The existing external audio input equipment does not have a wireless connection function, is poor in mobility and flexibility, and is not wide enough in orientation range and low in sound source positioning precision.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a need not to change electronic equipment's current hardware architecture can strengthen electronic equipment's audio frequency collection effect is provided, has the wireless connection function, and the orientation range is wider, the higher external audio input equipment of ring shape microphone array of taking wireless connection of sound source positioning accuracy.
The utility model discloses a realize solving above-mentioned technical problem through following technical means: the annular microphone array external audio input device with the wireless connection comprises a CPU main circuit board (3), a microphone circuit board (7), a microphone array (8), a PCB antenna (9) and a wireless connection module (10); the microphone circuit board (7) is connected with the CPU main circuit board (3); the microphone array (8) comprises a plurality of microphones which are arranged at equal intervals to form a circular array, and the microphone array (8) is connected with the CPU main circuit board (3) through the microphone circuit board (7); the PCB antenna (9) is connected with the CPU main circuit board (3); the wireless connection module (10) is connected with the PCB antenna (9).
The external microphone array is adopted, the audio acquisition effect of the electronic equipment can be enhanced without changing the existing hardware structure of the electronic equipment, the experience of a user is improved, and the implementation cost of the scheme is obviously reduced; the annular microphone array has super-strong directivity, only sound sources in a directional range can pick up sound, and interference noise in different environments can be effectively shielded; compared with the linear microphone array with the orientation range of only 0-180 degrees, the annular microphone array with the orientation range of 0-360 degrees is an array topological structure with wider orientation range and higher sound source positioning precision, and can efficiently realize algorithms in various speech signal processing fields, such as sound source positioning and the like; the wireless connection module can support a user to wirelessly process sound signals received by the microphone array, and the mobility and the flexibility of the equipment are improved.
As an optimized technical scheme, the externally-connected audio input device with the wirelessly-connected annular microphone array further comprises a rechargeable battery (11), and the rechargeable battery (11) is connected with the CPU main circuit board (3). The rechargeable battery is adopted, so that the rechargeable battery can be charged for use, does not need to be connected with a power supply, and is convenient to use.
As an optimized technical scheme, the annular microphone array external audio input device with the wireless connection also comprises an interface circuit board (4), a USB interface (5) and an AV interface (6); the interface circuit board (4) is connected with the CPU main circuit board (3); the USB interface (5) is arranged on the interface circuit board (4), and the USB interface (5) is connected with the CPU main circuit board (3) through the interface circuit board (4); the AV interface (6) is connected with the CPU main circuit board (3); the microphone circuit board (7) is respectively connected with the interface circuit board (4) and the AV interface (6); the microphone array (8) is respectively connected with the interface circuit board (4) and the AV interface (6) through the microphone circuit board (7); the PCB antenna (9) is connected with the interface circuit board (4), and the PCB antenna (9) is connected with the CPU main circuit board (3) through the interface circuit board (4).
The USB interface is used for receiving external power supply and outputting multi-channel sound signals and reference sound signals picked up by the microphone array to the outside, the electronic equipment reads the multi-channel sound signals picked up by the microphone array through the USB interface, the AV interface is used for recovering the reference sound signals to eliminate echoes, and the USB interface and the AV interface respectively store the processed single-channel sound signals and the recovered reference sound signals into a buffer area maintained by the USB interface and the AV interface. The USB interface is a very common interface for consumer electronics, can be adapted to different intelligent electronic equipment by adopting the USB interface, and has strong adaptability, convenient use and stable performance; the AV interface is adopted to recover the reference sound signal, so that the requirements of different speech processing algorithms can be met, different operating systems can be effectively adapted to carry out secondary development, and the function of the built-in algorithm of the electronic equipment is efficiently exerted; and wired connection or wireless connection can be selected, so that the flexibility is high.
As an optimized technical scheme, an IIS interface is arranged on the CPU main circuit board (3). Can avoid using the USB interface according to developer's demand, directly use IIS hardware interface to carry out secondary development, the power supply mode of microphone array can select to remain the USB interface and only do the mains operated use this moment, perhaps selects to pull down the interface circuit board and supplies power through plus supply socket, and the practicality is strong and maneuverability is high, has improved developer's work efficiency.
As an optimized technical scheme, the USB interface (5) adopts a Micro-USB interface or a USB Type-C interface.
As the optimized technical scheme, the external audio input equipment of the circular ring-shaped microphone array with the wireless connection further comprises an inserting needle plate (2), the CPU main circuit board (3) is connected with the inserting needle plate (2), the interface circuit board (4) is connected with the inserting needle plate (2) through an inserting needle interface, and the interface circuit board (4) is connected with the CPU main circuit board (3) through the inserting needle plate (2). The interface circuit board is separated from the CPU main circuit board and is connected with the CPU main circuit board through the pin board, so that a user can conveniently and freely customize the interface circuit board, and the cost optimization of the user is facilitated.
As the optimized technical scheme, the external audio input device with the wirelessly connected circular microphone array further comprises a shell (1), an inserting needle plate (2), a CPU main circuit board (3), an interface circuit board (4), a USB interface (5), an AV interface (6), a PCB antenna (9) and a wireless connection module (10) are all arranged in an inner cavity of the shell (1), the side face of the shell (1) is provided with two connecting holes which are respectively communicated with the USB interface (4) and the AV interface (6), a microphone circuit board (7) is fixedly connected to the top face of the shell (1), and a microphone array (8) is arranged on the outer side face of the microphone circuit board (7). Reasonable structure and convenient use.
As an optimized technical scheme, the microphone array (8) comprises 6 microphones which are arranged at equal intervals to form a circular ring array.
As an optimized technical scheme, an wif connection module is arranged on the wireless connection module (10).
As an optimized technical scheme, a Bluetooth connection module is arranged on the wireless connection module (10).
The utility model has the advantages that:
1. the audio acquisition effect of the electronic equipment can be enhanced without changing the existing hardware structure of the electronic equipment, the experience of a user is improved, and the implementation cost of the scheme is obviously reduced; the annular microphone array has super-strong directivity, only sound sources in a directional range can pick up sound, and interference noise in different environments can be effectively shielded; the method has the advantages that the orientation range is wide, the sound source positioning precision is high, and algorithms in various speech signal processing fields such as sound source positioning can be efficiently realized; the wireless connection module can support a user to wirelessly process sound signals received by the microphone array, and the mobility and the flexibility of the equipment are improved.
2. Can be charged for use, does not need to be connected with a power supply, and is convenient to use.
3. The adaptability is strong, the use is convenient, and the performance is stable; the method can meet the requirements of realizing different voice processing algorithms, can effectively adapt to different operating systems for secondary development, and efficiently exerts the function of the built-in algorithm of the electronic equipment; and wired connection or wireless connection can be selected, so that the flexibility is high.
4. Can avoid using the USB interface according to developer's demand, directly use IIS hardware interface to carry out secondary development, the power supply mode of microphone array can select to remain the USB interface and only do the mains operated use this moment, perhaps selects to pull down the interface circuit board and supplies power through plus supply socket, and the practicality is strong and maneuverability is high, has improved developer's work efficiency.
5. The USB interface circuit board and the AV interface circuit board are both separated from the CPU main circuit board, and are connected with the CPU main circuit board through the pin plate, so that a user can conveniently and freely customize the USB interface circuit board, and the cost optimization of the user is facilitated.
Drawings
Fig. 1 is the schematic diagram of the internal structure of the external audio input device of the circular microphone array with wireless connection according to the embodiment of the present invention.
Fig. 2 is the external structure diagram of the external audio input device of the ring-shaped microphone array with wireless connection of the embodiment of the present invention.
Fig. 3 is the utility model discloses the circular ring shape microphone array external audio input equipment who takes wireless connection carries out wireless connection's work flow chart.
Fig. 4 is a flowchart illustrating the operation of wired connection of the external audio input device of the circular microphone array with wireless connection according to the embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the externally connected audio input device with a wirelessly connected annular microphone array includes a housing 1, an insertion pin plate 2, a CPU main circuit board 3, an interface circuit board 4, a USB interface 5, an AV interface 6, a microphone circuit board 7, a microphone array 8, a PCB antenna 9, a wireless connection module 10, and a rechargeable battery 11.
The shell 1 is an approximate cylinder, and two sides of the lower half part of the side surface of the shell are respectively provided with a fan-shaped groove; the pin board 2, the CPU main circuit board 3, the interface circuit board 4, the USB interface 5, the AV interface 6, the PCB antenna 9, the wireless connection module 10 and the rechargeable battery 11 are all arranged in the inner cavity of the shell 1, and connecting holes for communicating the USB interface 4 and the AV interface 6 are respectively arranged in two fan-shaped grooves on the side surface of the shell 1; microphone circuit board 7 fixed connection is at the top surface of shell 1, and microphone array 8 is installed at the lateral surface of microphone circuit board 7.
The pin board 2 is fixedly connected in the shell 1, the CPU main circuit board 3 is connected with the pin board 2, and the IIS interface is arranged on the CPU main circuit board 3.
The interface circuit board 4 is connected with the pin board 2 through a pin interface, and the interface circuit board 4 is connected with the CPU main circuit board 3 through the pin board 2.
The USB interface 5 is installed at the edge of the interface circuit board 4, the USB interface 5 is connected with the CPU main circuit board 3 through the interface circuit board 4, and the USB interface 5 adopts a Micro-USB interface or a USB Type-C interface.
The AV interface 6 is connected to the CPU main circuit board 3.
The microphone circuit board 7 is respectively connected with the CPU main circuit board 3, the interface circuit board 4 and the AV interface 6.
The microphone array 8 comprises 6 microphones which are arranged in a circular array at equal intervals, and the microphone array 8 is respectively connected with the CPU main circuit board 3, the interface circuit board 4 and the AV interface 6 through the microphone circuit board 7.
The PCB antenna 9 is connected with the interface circuit board 4, and the PCB antenna 9 is connected with the CPU main circuit board 3 through the interface circuit board 4.
The wireless connection module 10 is connected with the PCB antenna 9, and the wireless connection module 10 is provided with an wif connection module and a Bluetooth connection module.
The rechargeable battery 11 is connected to the CPU main circuit board 3.
As shown in fig. 3, the work flow of the wireless connection of the annular microphone array with wireless connection and the external audio input device is as follows: through PCB antenna 9 and wireless connection module 10 with electronic equipment wireless connection, microphone array 8 is responsible for picking up sound signal and obtaining the reference tone signal, and sound signal sends upper computer electronic equipment or circuit board, and the wave beam shaping related algorithm in the signal processing field in the cooperation equipment carries out enhancement processing to the sound signal that microphone array 8 picked up, and the pronunciation after the enhancement processing is write in the buffer memory.
As shown in fig. 4, the working process of the wired connection of the annular microphone array with wireless connection and the external audio input device is as follows: the USB interface 5 and the AV interface 6 are connected with an electronic device, the microphone array 8 is responsible for picking up sound signals and obtaining reference sound signals, the sound signals are written into the USB interface 5 and the AV interface 6, software reads in the sound signals from the USB interface 5 and the AV interface 6, enhancement processing is carried out on the sound signals picked up by the microphone array 8 in cooperation with a wave beam forming related algorithm in the field of signal processing in the device, and voice after enhancement processing is written into a cache area.
When the microphone array is used by a user, the annular microphone array external audio input device with the wireless connection is wirelessly connected with electronic equipment through the PCB antenna 9 and the wireless connection module 10, the rechargeable battery 11 supplies power to the microphone array 8, and sound signals picked up by the microphone array 8 are sent to the electronic equipment or the circuit board of the upper computer through WIFI or Bluetooth; the USB interface 5 and the AV interface 6 can be respectively connected with electronic equipment through connecting lines, the microphone array 8 is responsible for picking up sound signals and acquiring reference sound signals, the USB interface 5 is used for receiving external power supply and outputting 4-channel sound signals and reference sound signals picked up by the microphone array 8 to the outside, the USB interface 5 can also charge the rechargeable battery 11 while supplying power, the electronic equipment reads in the 4-channel sound signals picked up by the microphone array 8 through the USB interface 5, the AV interface 6 is used for recovering the reference sound signals, and the USB interface 5 and the AV interface 6 respectively store the processed single-channel sound signals and the recovered reference sound signals into a buffer area maintained by the electronic equipment; the IIS interface and the AV interface 6 on the CPU main circuit board 3 can be respectively connected with the electronic equipment or the circuit board without using the USB interface 5, at the moment, the microphone array 8 is responsible for picking up the sound signals and acquiring the reference sound signals, the electronic equipment or the circuit board reads in the 4-channel sound signals picked up by the microphone array 8 through the IIS interface on the CPU main circuit board 3, and the AV interface 6 is used for back-picking the reference sound signals; when the USB interface 5 is not used for connecting the electronic equipment, the USB interface 5 can be selected to be reserved, the USB interface 5 is connected with a power supply and is only used for supplying power, and the interface circuit board 4 can be detached and supplied with power through an external power socket. The 4-channel sound signals picked up by the microphone array 8 can be processed by further related algorithms in the signal processing field, wherein the related algorithms comprise echo cancellation, beam forming algorithm and DOA algorithm for enhancing or positioning the audio signals. The beamforming algorithm may use the existing MVDR (minimum variance distortion) algorithm, the most basic DS (delay and sum) algorithm or other algorithms, and the DOA correlation algorithm may use the classical subspace decomposition-based MUSIC, ESPRIT, and other algorithms. The software stores the enhanced single-channel sound signal into a buffer zone maintained by the software, and the enhanced single-channel sound signal can be read and used by software of other third parties.
The developer can read in or store the required audio data by using the USB interface 5 and the AV interface 6, and can also avoid using the USB interface 5 by a mode of supplying power only by using the USB interface 5 or a mode of detaching the interface circuit board 4 and adding a power socket, directly use the IIS interface on the CPU main circuit board 3 for secondary development, and the user can use the specific algorithm of corresponding software for sound signal processing. The annular microphone array with the wireless connection is externally connected with an audio input device which is used as an audio acquisition end to pick up audio in a certain range, and then is matched with software SDK (software development kit) at a mobile phone end, so that audio with strong directivity can be obtained; the electronic device end or the mobile phone end is used as a control end for processing the received audio signals, such as reducing noise interference in the audio, enhancing audio effect and the like.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a take external audio input equipment of wireless connection's ring shape microphone array which characterized in that: the microphone comprises a CPU main circuit board (3), a microphone circuit board (7), a microphone array (8), a PCB antenna (9) and a wireless connection module (10); the microphone circuit board (7) is connected with the CPU main circuit board (3); the microphone array (8) comprises a plurality of microphones which are arranged at equal intervals to form a circular array, and the microphone array (8) is connected with the CPU main circuit board (3) through the microphone circuit board (7); the PCB antenna (9) is connected with the CPU main circuit board (3); the wireless connection module (10) is connected with the PCB antenna (9).
2. The externally-connected audio input device with the wirelessly-connected circular annular microphone array of claim 1, wherein: the externally-connected audio input device with the wirelessly-connected annular microphone array further comprises a rechargeable battery (11), and the rechargeable battery (11) is connected with the CPU main circuit board (3).
3. The externally-connected audio input device with the wirelessly-connected annular microphone array of claim 1 or 2, wherein: the annular microphone array external audio input device with the wireless connection also comprises an interface circuit board (4), a USB interface (5) and an AV interface (6); the interface circuit board (4) is connected with the CPU main circuit board (3); the USB interface (5) is arranged on the interface circuit board (4), and the USB interface (5) is connected with the CPU main circuit board (3) through the interface circuit board (4); the AV interface (6) is connected with the CPU main circuit board (3); the microphone circuit board (7) is respectively connected with the interface circuit board (4) and the AV interface (6); the microphone array (8) is respectively connected with the interface circuit board (4) and the AV interface (6) through the microphone circuit board (7); the PCB antenna (9) is connected with the interface circuit board (4), and the PCB antenna (9) is connected with the CPU main circuit board (3) through the interface circuit board (4).
4. The externally-connected audio input device with the wirelessly-connected circular annular microphone array of claim 3, wherein: an IIS interface is arranged on the CPU main circuit board (3).
5. The externally-connected audio input device with the wirelessly-connected circular annular microphone array of claim 3, wherein: the USB interface (5) adopts a Micro-USB interface or a USB Type-C interface.
6. The externally-connected audio input device with the wirelessly-connected circular annular microphone array of claim 3, wherein: this take external audio input equipment of wireless connection's ring shape microphone array still includes contact pin board (2), CPU main circuit board (3) are connected contact pin board (2), interface circuit board (4) are through contact pin interface connection contact pin board (2), interface circuit board (4) pass through contact pin board (2) are connected CPU main circuit board (3).
7. The externally-connected audio input device with the wirelessly-connected circular annular microphone array of claim 6, wherein: this take external audio input equipment of wireless connection's ring shape microphone array still includes shell (1), needle inserting plate (2), CPU main circuit board (3), interface circuit board (4), USB interface (5), AV interface (6), PCB antenna (9), wireless connection module (10) are all established in the inside cavity of shell (1), the side of shell (1) is equipped with two and communicates respectively the connecting hole of USB interface (5), AV interface (6), microphone circuit board (7) fixed connection be in the top surface of shell (1), microphone array (8) are installed the lateral surface of microphone circuit board (7).
8. The externally-connected audio input device with the wirelessly-connected annular microphone array of claim 1 or 2, wherein: the microphone array (8) comprises 6 microphones which are arranged at equal intervals to form a circular ring array.
9. The externally-connected audio input device with the wirelessly-connected annular microphone array of claim 1 or 2, wherein: and wif connecting modules are arranged on the wireless connecting module (10).
10. The externally-connected audio input device with the wirelessly-connected annular microphone array of claim 1 or 2, wherein: the wireless connection module (10) is provided with a Bluetooth connection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922469545.8U CN210694338U (en) | 2019-12-31 | 2019-12-31 | Annular microphone array external audio input device with wireless connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922469545.8U CN210694338U (en) | 2019-12-31 | 2019-12-31 | Annular microphone array external audio input device with wireless connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210694338U true CN210694338U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922469545.8U Active CN210694338U (en) | 2019-12-31 | 2019-12-31 | Annular microphone array external audio input device with wireless connection |
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| Country | Link |
|---|---|
| CN (1) | CN210694338U (en) |
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2019
- 2019-12-31 CN CN201922469545.8U patent/CN210694338U/en active Active
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