Dual-microphone one-to-four wireless digital signal transmission system and audio system

Abstract

The invention provides a dual-microphone one-to-four wireless digital signal transmission system. The dual-microphone one-to-four wireless digital signal transmission system comprises a plurality of microphones and a wireless signal receiving module, wherein the first microphone receives a first external sound signal; the second microphone receives a second external sound signal and outputs the second external sound signal to the first microphone; the third microphone receives a third external sound signal; the fourth microphone receives a fourth external sound signal, and the third microphone outputs a third external sound signal received by the third microphone to the fourth microphone; and the wireless signal receiving module is wirelessly connected with the first microphone and the fourth microphone and is used for processing the received first external sound signal, the second external sound signal, the third external sound signal and the fourth external sound signal and then outputting a mixed audio signal to an external terminal. According to the system, the microphone and the wireless signal receiving module are in wireless digital signal transmission, so that the use of wires is reduced, a transmission network is simpler, and signal interference is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of microphones, in particular to a dual-microphone one-to-four wireless digital signal transmission system and an audio system. BACKGROUND

[0002] With the rise of multi-person collaborative podcasting, synchronous recording by multiple people in the same physical space has become an important demand in the content creation field. The current mainstream solution generally uses multiple independent wired microphones in combination with a mixing console or audio interface device to collect signals, and connects each microphone to a central processing terminal through a physical cable to ensure independent controllable sound pickup effects for each audio track. This mode can achieve basic functions in professional recording studio scenarios, but it has obviously failed to meet the requirements of emerging creators for device portability and spatial flexibility, especially in lightweight scenarios such as home studios and mobile recording.

[0003] The excessive dependence on wired connections in the prior art directly leads to low deployment efficiency of the device, and the complex wires not only occupy a large amount of desktop space, but also form a complex signal transmission network. The interlaced cables between multiple microphones and terminal devices can easily cause signal interference, poor contact, and other hidden dangers, and at the same time force participants to be limited to fixed positions, which seriously restricts dynamic interaction performance during recording. In addition, additional devices such as mixing consoles and splitters required when multiple devices work together further increase the system complexity, posing a high operation threshold for non-professional users, which is in obvious conflict with the product demand of the current user group for plug-and-play and rapid deployment. SUMMARY

[0004] The present application proposes a dual-microphone one-to-four wireless digital signal transmission system, which uses wireless signal transmission between the microphone and the mixing console or audio interface device to replace the traditional wired transmission mode, improves the flexibility of the use space, simplifies signal transmission, and avoids complex wiring, etc.

[0005] In a first aspect, a dual-microphone one-to-four wireless digital signal transmission system is provided, the system comprising: a first microphone configured to receive a first external sound signal; a second microphone configured to receive a second external sound signal, the second microphone being configured to output the received second external sound signal to the first microphone; a third microphone configured to receive a third external sound signal; a fourth microphone configured to receive a fourth external sound signal, the third microphone being configured to output the received third external sound signal to the fourth microphone; and The wireless signal receiving module is wirelessly connected to the first microphone and the fourth microphone, and is used to process the received first external sound signal, second external sound signal, third external sound signal and fourth external sound signal, and output audio signals to an external terminal.

[0006] In a second aspect, the present application provides an audio system, including an external device and a dual-microphone one-to-four wireless digital signal transmission system, wherein the external device is used to play the audio signal output by the dual-microphone one-to-four wireless digital signal transmission system.

[0007] Compared with the existing technology, the dual-microphone one-to-four wireless digital signal transmission system of the present invention transmits through wireless digital signals, reducing the use of wires, making the transmission network simpler, and avoiding signal interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0009] Figure 1 This is a schematic diagram of a dual-microphone one-to-four wireless digital signal transmission system module in the present invention; Figure 2 This is a module schematic diagram of a one-way monitoring mode of a dual-microphone one-to-four wireless digital signal transmission system of the present invention; Figure 3 This is a module schematic diagram of a dual-microphone one-to-four wireless digital signal transmission system in full monitoring mode according to the present invention; Figure 4 For the present invention Figure 1 Specific module diagram of the first microphone, the second microphone, the third microphone, and the fourth microphone; Figure 5 For the present invention Figure 1 A specific module diagram of another embodiment of the first microphone and the second microphone; Figure 6 For the present invention Figure 1 A specific module diagram of another embodiment of the third microphone and the fourth microphone; Figure 7 For the present invention Figure 1 A specific module diagram of another embodiment of the first microphone and the second microphone; Figure 8 For the present invention Figure 1 A specific module diagram of another implementation of the third microphone and the fourth microphone; Figure 9 For the present invention Figure 1 Specific module diagram of the wireless signal processing module; and Figure 10 For the present invention Figure 1 Specific module diagram of another embodiment of the wireless signal processing module.

[0010] Reference numerals: 10. First microphone; 20. Second microphone; 30. Third microphone; 40. Fourth microphone; 50. Wireless signal receiving module; 60. External terminal; 101. First sound receiving module; 201. Second sound receiving module; 301. Third sound receiving module; 401. Fourth sound receiving module; 102. First input module; 202. Second input module; 302. Third input module; 402. Fourth input module; 103. First output module; 203. Second output module; 303. Third output module; 403. Fourth output module; 105. First monitoring module; 205, second monitoring module; 305, third monitoring module; 405, fourth monitoring module; 1031, 4031, first wireless output interface; 1032, 4032, first wireless receiving interface; 2031, 3031, wired output interface; 2032, 3032, second wireless output interface; 2033, 3033, second wireless receiving interface; 501, third wireless receiving interface; 504, fourth wireless receiving interface; 503, fifth processing module; 504, third wireless output interface; 505, fourth wireless output interface; 506, signal transmission module. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0012] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0013] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0014] The embodiment of the application provides a schematic diagram of a two-microphone four-in-one wireless digital signal transmission system module, please refer to Figure 1 The system comprises a first microphone 10, a second microphone 20, a third microphone 30, a fourth microphone 40 and a wireless signal receiving module 50. In the embodiment, the first microphone 10 receives a first external sound signal, the second microphone 20 receives a second external sound signal and outputs the second external sound signal to the first microphone 10, the third microphone receives a third external sound signal, the fourth microphone receives a fourth external sound signal, and the third microphone 30 outputs the received third external sound signal to the fourth microphone 40. The wireless signal receiving module 50 is wirelessly connected with the first microphone 10 and the fourth microphone 40, and is used for processing the received first external sound signal, second external sound signal, third external sound signal and fourth external sound signal and outputting mixed audio signals to an external terminal 60.

[0015] In the embodiment, the first microphone 10 and the fourth microphone 40 are used as master microphones, and the second microphone 20 and the third microphone 30 are used as slave microphones. The first microphone 10 wirelessly outputs the collected first external sound signal and the second external sound signal received from the second microphone 20 to the wireless signal receiving module 50, and the fourth microphone 40 wirelessly outputs the collected fourth external sound signal and the third external sound signal received from the third microphone 30 to the wireless signal receiving module 50. In this way, the first microphone 10 and the fourth microphone 40 mix the multi-channel signals and transmit the mixed signals to the wireless signal receiving module 50, so that a receiver only needs two channels to simultaneously receive four-channel audio signals.

[0016] The first and fourth microphones 10 and 40 have built-in mixing chips that perform time alignment and level balancing on the first and fourth external sound signals they collect, as well as the second and third external sound signals received from the second and third microphones 20 and 30. Furthermore, the first and fourth microphones 10 and 40 utilize DSP chips for noise suppression and dynamic range compression, ensuring wireless transmission quality. The wireless protocol between them and the wireless signal receiving module 50 utilizes low-latency digital wireless technology (such as 2.4 GHz FHSS or UHF bands), supporting multi-channel parallel transmission to avoid signal interference. The first and fourth microphones 10 and 40 encode and compress the data streams via the wireless transmitter module and transmit them to the wireless signal receiving module 50. The wireless signal receiving module 50 decodes the received data and outputs an audio signal to an external terminal 60. In this embodiment, the audio signal can be a single-track signal that fully mixes the four external sound signals; a dual-track signal that combines the first, second, third, and fourth external sound signals; or a four-track independent signal that combines the first, second, third, and fourth external sound signals.

[0017] The external terminal 60 further mixes the signal, records it in separate tracks, or streams it live using traditional DAW / mixing console software.

[0018] In this embodiment, the connection method between the second microphone 20 and the first microphone 10, and the connection method between the third microphone 30 and the fourth microphone 40 can be a 2.4 GHz wireless connection, or a wired connection using 3.5mm, USB, or XLR. Of these, the XLR wired connection is a one-way communication, while the 2.4 GHz wireless connection and the 3.5mm, USB, and XLR wired connections are two-way communication.

[0019] Figure 2 This is a schematic diagram of a dual-microphone, one-to-four wireless digital signal transmission system in one-way monitoring mode. The second microphone 20 and the first microphone 10 utilize XLR one-way wired transmission, while the third microphone 30 and the fourth microphone 40 utilize XLR one-way wired transmission. The first microphone 10 is connected to the first headphone HP1, the second microphone 20 is connected to the second headphone HP2, the third microphone is connected to the third headphone HP3, the fourth microphone is connected to the fourth headphone HP4, and the wireless signal receiving module 50 is connected to the fifth headphone HP5.

[0020] In the embodiment, the earphone and the microphone can be connected by a 3.5mm wire or by a 2.4GHz or Bluetooth wireless connection. When the earphone and the microphone are connected by a 3.5mm wire, the earphone can only hear the external sound signal collected by the microphone itself; when the earphone and the microphone are connected by a 2.4GHz or Bluetooth wireless connection, the earphone can hear the signal output by the other microphone or the audio signal returned by the wireless signal receiving module 50.

[0021] Therefore, in Figure 2 the second earphone HP2 can only hear the second external sound signal collected by the second microphone 20 itself, and the third earphone HP3 can only hear the third external sound signal collected by the third microphone 30 itself. Since the first microphone 10 and the fourth microphone 40 are in bidirectional wireless communication with the wireless signal receiving module 50, the wireless signal receiving module 50 returns the mixed audio signal output by it to the first microphone 10 and the fourth microphone 40. Therefore, when the first earphone HP1 and the fourth earphone HP4 are connected to the first microphone 10 and the fourth microphone 40 by a 3.5mm wire, the first earphone HP1 can only hear the first external sound signal collected by the first microphone 10 itself, and the fourth earphone HP4 can only hear the fourth external sound signal collected by the fourth microphone 40 itself; when the first earphone HP1 and the fourth earphone HP4 are connected to the first microphone 10 and the fourth microphone 40 by a 2.4GHz wireless connection, the first earphone HP1 and the fourth earphone HP4 can hear the mixed audio signal returned by the wireless signal receiving module 50. The fifth earphone HP5 can hear the mixed audio signal output by the wireless signal receiving module 50.

[0022] In addition to the Figure 2 unidirectional listening mode Figure 3 , the full listening mode is different from the system shown in Figure 2 in that the second microphone 20 and the first microphone 10 adopt a 3.5mm, USB bidirectional wired transmission mode or a wireless transmission mode, and the third microphone 30 and the fourth microphone 40 adopt a 3.5mm, USB bidirectional wired transmission mode or a wireless transmission mode. Therefore, the wireless signal receiving module 50 can not only return the mixed audio signal output by it to the first microphone 10 and the fourth microphone 40, but also return it to the second microphone 20 and the third microphone 30 through the first microphone 10 and the fourth microphone 40. In this way, all earphones can hear the mixed audio signal output by the wireless signal receiving module 50.

[0023] Figure 4 For the present application Figure 1The first microphone 10, the second microphone 20, the third microphone 30 and the fourth microphone 40 are shown in the specific module diagram.

[0024] The first microphone 10 comprises a first sound collecting module 101, a first input module 102 and a first output module 103. The first sound collecting module 101 collects a first external sound signal and transmits it to the first output module 103. The first input module 102 is connected to the first output module 103 and is used to transmit the received signal to the first output module 103.

[0025] The second microphone 20 comprises a second sound collecting module 201, a second input module 202 and a second output module 203. The second sound collecting module 201 collects a second external sound signal and transmits it to the second output module 203. The second output module 203 is electrically connected to the first input module 102 and transmits the second external sound signal to the first input module 102. Meanwhile, the first output module 103 is electrically connected to the second input module 202 and is used to send the signal output by the first microphone 10 back to the second microphone 20.

[0026] The third microphone 30 comprises a third sound collecting module 301, a third input module 302 and a third output module 303. The third sound collecting module 301 collects a third external sound signal and transmits it to the third output module 303. The third input module 302 is connected to the third output module 303 and is used to transmit the received signal to the third output module 303.

[0027] The fourth microphone 40 comprises a fourth sound collecting module 401, a fourth input module 402 and a fourth output module 403. The fourth sound collecting module 401 collects a fourth external sound signal and transmits it to the fourth output module 403. The third output module 303 is electrically connected to the fourth input module 402 and transmits the third external sound signal to the fourth input module 402. Meanwhile, the fourth output module 403 is electrically connected to the third input module 302 and is used to send the signal output by the fourth microphone 40 back to the third microphone 30.

[0028] The first output module 103 and the fourth output module 403 are both connected to a wireless signal receiving module 50 and are used to output the first external sound signal and the second external sound signal, the third external sound signal and the fourth external sound signal to an external terminal 60. In this embodiment, the first output module 103 is connected to a first earphone HP1, the second output module 203 is connected to a second earphone HP2, the third output module 303 is connected to a third earphone HP3, the fourth output module 403 is connected to a fourth earphone HP4, and the wireless signal receiving module 50 is connected to a fifth earphone HP5.

[0029] In the present application, the first receiving module 101 of the first microphone 10 receives a first external sound signal and transmits it to the first output module 103, the second receiving module 201 of the second microphone 20 receives a second external sound signal and transmits it to the second output module 203, and the second output module 203 transmits the second external sound signal to the first output module 103 through the first input module 102, so that the first output module 103 of the first microphone 10 wirelessly outputs the first external sound signal and the second external sound signal to the wireless signal receiving module 50; similarly, the third receiving module 301 of the third microphone 30 receives a third external sound signal and transmits it to the third output module 303, the fourth receiving module 401 of the fourth microphone 40 receives a fourth external sound signal and transmits it to the fourth output module 403, and the third output module 303 transmits the third external sound signal to the fourth output module 403 through the fourth input module 402, so that the fourth output module 403 of the fourth microphone 40 wirelessly outputs the third external sound signal and the fourth external sound signal to the wireless signal receiving module 50. The wireless signal receiving module 50 mixes the four external sound signals and outputs an audio signal to the external device 60, thereby realizing the input of audio signals of four microphones through two wireless transmission channels. In other embodiments of the present application, the first microphone 10 can be connected in series with multiple second microphones 20, and the fourth microphone 40 can be connected in series with multiple third microphones 30, thereby realizing the connection of multiple microphones.

[0030] In the present embodiment, the second output module 203 and the first input module 102 can be unidirectional electrical connection or bidirectional electrical connection; similarly, the third output module 303 and the fourth input module 402 can be unidirectional electrical connection or bidirectional electrical connection. In the present embodiment, the unidirectional electrical connection is XLR interface wired connection, and the bidirectional electrical connection can be 3.5mm, USB wired connection or 2.4GHz wireless connection.

[0031] When the second output module 203 and the first input module 102, and the third output module 303 and the fourth input module 402 are unidirectional electrical connection, the first input module 102, the second input module 202, the third input module 302 and the fourth input module 402 are unidirectional input modules, and the second output module 203 and the third output module 303 are unidirectional output modules.

[0032] Reference is made to Figure 5 and Figure 6, is another embodiment of the first microphone 10, the second microphone 20, the third microphone 30, and the fourth microphone 40. The first microphone 10 comprises a first sound collecting module 101, a first input module 102, a first output module 103, a first processing module 104, and a first monitoring module 105. The first output module 103 comprises a first wireless output interface 1031 and a first wireless receiving interface 1032. The first processing module 104 is connected between the first sound collecting module 101, the first input module 102, and the first output module 103, and is configured to receive the first external sound signal collected by the first sound collecting module 101 and the second external sound signal output by the first input module 102, and output the two signals after processing to the first output module 103. Specifically, the first processing module 104 is connected to the first wireless output interface 1031, and outputs the processed first external sound signal and second external sound signal to the wireless signal receiving module 50 through the first wireless output interface 1031. The wireless signal receiving module 50 is connected to the first processing module 104 through the first wireless receiving interface 1032, and is configured to send the audio signal output by the wireless signal receiving module 50 back to the first processing module 104. Meanwhile, the first monitoring module 105 is connected to the first processing module 104, and is configured to monitor the audio signal sent back by the first wireless receiving interface 1032 or the first external sound signal collected by the first microphone 10.

[0033] The second microphone 20 comprises a second sound collecting module 201, a second input module 202, a second output module 203, a second processing module 204, and a second monitoring module 205. The second processing module 204 is connected between the second sound collecting module 201, the second input module 202, and the second output module 203, and is configured to receive the second external sound signal collected by the second sound collecting module 201 and output the second external sound signal to the second output module 203. In this embodiment, the second output module 203 is unidirectionally electrically connected to the first input module 102. The second monitoring module 205 is connected to the second processing module 204, and is configured to monitor the second external sound signal collected by the second microphone 20.

[0034] Similarly, the third microphone 30 comprises a third sound collecting module 301, a third input module 302, a third output module 303, a third processing module 304, and a third monitoring module 305. The third processing module 304 is connected between the third sound collecting module 301, the third input module 302, and the third output module 303, and is configured to receive the third external sound signal collected by the third sound collecting module 301 and output the third external sound signal to the third output module 303. The third monitoring module 305 is connected to the third processing module 304, and is configured to monitor the third external sound signal collected by the third microphone 30.

[0035] The fourth microphone 40 comprises a fourth sound collecting module 401, a fourth input module 402, a fourth output module 403, a fourth processing module 404 and a fourth monitoring module 405. The fourth output module 403 comprises a first wireless output interface 4031 and a first wireless receiving interface 4032. The fourth processing module 404 is connected between the fourth sound collecting module 401, the fourth input module 402 and the fourth output module 403, and is configured to receive the fourth external sound signal collected by the fourth sound collecting module 401 and the third external sound signal output by the fourth input module 402, and output the two signals after processing to the fourth output module 403. Specifically, the fourth processing module 404 is connected with the first wireless output interface 4031, and outputs the processed third external sound signal and fourth external sound signal to the wireless signal receiving module 50 through the first wireless output interface 4031. The wireless signal receiving module 50 is connected with the fourth processing module 404 through the first wireless receiving interface 4032, and is configured to send the audio signal output by the wireless signal receiving module 50 back to the fourth processing module 404. Meanwhile, the fourth monitoring module 405 is connected with the fourth processing module 404, and is configured to monitor the audio signal sent back by the first wireless receiving interface 4032 or the fourth external sound signal collected by the fourth microphone 40. Similarly, the third output module 303 is unidirectionally and electrically connected with the fourth input module 402.

[0036] In summary, the second microphone 20 unidirectionally transmits the second external sound signal to the first microphone 10. The first microphone 10 outputs the first external sound signal collected by itself and the second external sound signal after processing by the first processing module 104 to the wireless signal processing module 50. The third microphone 30 unidirectionally transmits the third external sound signal to the fourth microphone 40. The fourth microphone 40 outputs the fourth external sound signal collected by itself and the third external sound signal after processing by the fourth processing module 404 to the wireless signal processing module 50. The circuit architecture is a second microphone 20 and a third microphone 30 independent monitoring mode, that is, only the external sound signal collected by itself can be monitored.

[0037] Conversely, when the second output module 203 and the third output module 303 are bidirectionally and electrically connected with the first input module 102 and the fourth input module 402 respectively, the first input module 102, the second input module 202, the third input module 302 and the fourth input module 402 are bidirectional input modules, and the second output module 203 and the third output module 303 are bidirectional output modules.

[0038] With reference to Figure 7 and Figure 8Another embodiment of the first microphone 10, the second microphone 20, the third microphone 30 and the fourth microphone 40. The first microphone 10 comprises a first sound collecting module 101, a first input module 102, a first output module 103, a first processing module 104 and a first monitoring module 105. The first output module 103 comprises a first wireless output interface 1031 and a first wireless receiving interface 1032. The first processing module 104 is connected between the first sound collecting module 101, the first input module 102 and the first output module 103, and is configured to receive the first external sound signal collected by the first sound collecting module 101 and the second external sound signal output by the first input module 102, and output the two signals after processing to the first output module 103. Specifically, the first processing module 104 is connected with the first wireless output interface 1031, and outputs the processed first external sound signal and the second external sound signal to the wireless signal receiving module 50 through the first wireless output interface 1031. The wireless signal receiving module 50 is connected with the first processing module 104 through the first wireless receiving interface 1032, and is configured to return the audio signal output by the wireless signal receiving module 50 to the first processing module 104. Meanwhile, the first monitoring module 105 is connected with the first processing module 104, and is configured to monitor the audio signal returned by the wireless signal receiving module 50 or the first external sound signal collected by the first microphone 10 itself.

[0039] The second microphone 20 comprises a second sound collecting module 201, a second input module 202, a second output module 203, a second processing module 204 and a second monitoring module 205. The second output module 203 comprises a wired output interface 2031, a second wireless output interface 2032 and a second wireless receiving interface 2033. The second processing module 204 is connected between the second sound collecting module 201, the second input module 202 and the second output module 203, and is configured to receive the second external sound signal collected by the second sound collecting module 201 and output the signal to the second output module 203. Specifically, the second processing module 204 can be bidirectionally electrically connected with the first input module 102 in the first microphone 10 through the wired output interface 2031 or the second wireless output interface 2032. Meanwhile, the first input module 102 is electrically connected with the second processing module 204 through the second wireless receiving interface 2033, and is configured to return the signal output by the first microphone 10 or the audio signal output by the wireless signal processing module 50 to the second processing module 204 of the second microphone 20. The second monitoring module 205 is connected with the second processing module 204, and is configured to monitor the audio signal returned by the first microphone 10 or the second external sound signal collected by the second microphone 20 itself. In this embodiment, the second output module 203 is bidirectionally electrically connected with the first input module 102.

[0040] Similarly, the fourth microphone 40 comprises a fourth sound collecting module 401, a fourth input module 402, a fourth output module 403, a fourth processing module 404, and a fourth monitoring module 405. The fourth output module 403 comprises a first wireless output interface 4031 and a first wireless receiving interface 4032. The fourth processing module 404 is connected between the fourth sound collecting module 401, the fourth input module 402, and the fourth output module 403, and is configured to receive the fourth external sound signal collected by the fourth sound collecting module 401 and the third external sound signal output by the fourth input module 402, and output the two signals after processing to the fourth output module 403. Specifically, the fourth processing module 404 is connected with the first wireless output interface 4031, and outputs the processed third external sound signal and fourth external sound signal to the wireless signal receiving module 50 through the first wireless output interface 4031. The wireless signal receiving module 50 is connected with the fourth processing module 404 through the first wireless receiving interface 4032, and is configured to return the audio signal output by the wireless signal receiving module 50 to the fourth processing module 404. Meanwhile, the fourth monitoring module 405 is connected with the fourth processing module 404, and is configured to monitor the audio signal returned by the wireless signal receiving module 50 or the fourth external sound signal collected by the fourth microphone 40 itself.

[0041] The third microphone 30 comprises a third sound collecting module 301, a third input module 302, a third output module 303, a third processing module 304, and a third monitoring module 305. The third output module 303 comprises a wired output interface 3031, a second wireless output interface 3032, and a second wireless receiving interface 3033. The third processing module 304 is connected between the third sound collecting module 301, the third input module 302, and the third output module 303, and is configured to receive the third external sound signal collected by the third sound collecting module 301 and output the third external sound signal to the third output module 303. Specifically, the third processing module 304 can be bidirectionally and electrically connected with the first input module 402 in the fourth microphone 40 through the wired output interface 3031 or the second wireless output interface 3032. Meanwhile, the first input module 402 is electrically connected with the third processing module 304 through the second wireless receiving interface 3033, and is configured to return the signal output by the fourth microphone 40 or the audio signal output by the wireless signal processing module 50 to the third processing module 304 of the third microphone 30. The third monitoring module 305 is connected with the third processing module 304, and is configured to monitor the third external sound signal collected by the third microphone 30 itself or the audio signal returned by the fourth microphone 40. In the embodiment, the third output module 303 is bidirectionally and electrically connected with the fourth input module 402.

[0042] In summary, the second microphone 20 transmits the second external sound signal to the first microphone 10. The first microphone 10 processes the first external sound signal and the second external sound signal collected by the first microphone 104 and then outputs them to the wireless signal processing module 50. The third microphone 30 transmits the third external sound signal to the fourth microphone 40. The fourth microphone 40 processes the fourth external sound signal and the third external sound signal collected by the fourth microphone 404 and then outputs them to the wireless signal processing module 50. This circuit architecture represents a global monitoring mode for the microphones, meaning that the microphones can monitor not only their own collected external sound signals but also the mixed audio signal from the wireless signal processing module 50.

[0043] Figure 9 This is a specific module diagram of the wireless signal processing module 50 of the present invention, which includes a third wireless receiving interface 501, a fourth wireless receiving interface 502, a fifth processing module 503, a third wireless output interface 504, a fourth wireless output interface 505, and a signal transmission module 506. The third wireless receiving interface 501 is connected to the first microphone 10 and is used to receive the first external sound signal and the second external sound signal output by the first microphone 10. The fourth wireless receiving interface 502 is connected to the fourth microphone 40 and is used to receive the third external sound signal and the fourth external sound signal output by the fourth microphone 40. The fifth processing module 503 processes the received first external sound signal, the second external sound signal, the third external sound signal, and the fourth external sound signal and outputs the processed audio signal. The third wireless output interface 504 returns the audio signal processed by the signal transmission module 506 to the first microphone 10, and the fourth wireless transmission interface 505 returns the audio signal processed by the signal transmission module 506 to the fourth microphone 40. The signal transmission module 506 is connected between the fifth processing module 503 and the external terminal 60 , and is configured to output the processed audio signal to the external terminal 60 .

[0044] In this embodiment, the signal transmission module 506 is connected to the external terminal 60 via a USB interface, and is connected to the fifth headset HP5 via a 3.5mm wired connection, thereby realizing a wired monitoring mode of the signal transmission module 50.

[0045] Figure 10 This is a specific architecture diagram of another embodiment of the wireless signal processing module 50 of the present invention. Figure 9 Roughly the same, except Figure 10 The wireless signal processing module 50 further includes a fifth wireless output interface 507, which is connected to the fifth processing module 503 and wirelessly connected to the fifth headset HP5, thereby realizing a wireless monitoring mode of the signal transmission module 50.

[0046] In summary, the main microphone 10, 40 receives the second and third external sound signals of the slave microphone 20, 30 through wired or wireless connection, the main microphone 10, 40 mixes or separates the first and fourth external sound signals collected by itself and the received second and third external sound signals, and transmits them to the wireless signal processing module 50 through a wireless protocol. The system of the embodiment adopts a full-duplex wireless link. One is the uplink, that is, the first microphone 10, the second microphone 20, the third microphone 30 and the fourth microphone 40 transmit their respective microphone signals to the wireless signal processing module 50 in a single-track or multi-track manner, and the wireless signal processing module 50 sends audio data in a 10ms cycle. Two is the downlink, that is, the wireless signal processing module 50 sends the global mixed sound signal to all microphones, which is used for the wireless listening mode of the microphone, and the wireless signal processing module 50 sends the signal in a 5ms cycle, and the wired guarantee ensures the real-time performance of the listening.

[0047] The connection mode of each microphone and the external earphone can be a 3.5mm wired connection or a Bluetooth wireless connection. When the microphone is connected to the earphone through a 3.5mm interface, the microphone enters a local listening mode, and the signal it listens to is the external sound signal collected by the microphone itself, which has no delay. When the main microphone 10, 40 mixes the first and second external sound signals collected by itself and the second and third external sound signals output by the slave microphone 20, 30, and distributes them to the slave microphone 20, 30 through a wired or wireless link, the microphone enters a mixed listening mode, and the signal it listens to is the mixed first and second external sound signals and the mixed third and fourth external sound signals, which is a low-delay signal with a delay time of ≤5ms. When the wireless signal receiving module 50 mixes the first, second, third and fourth external sound signals, and sends them back to the main microphone 10, 40 through a wireless downlink, and then the main microphone 10, 40 transmits the mixed sound signal to the slave microphone 20, 30, the microphone enters a global listening mode, and the signal it listens to is the mixed sound signal output by the wireless signal receiving module 50, which has a delay depending on the wireless protocol, and the delay time is ≤15ms.

[0048] In conclusion, the two-microphone four-drag wireless digital signal transmission system of the present application realizes four microphone inputs by only two wireless channels through master-slave cascade design, reduces equipment cost; the slave microphones 20, 30 can be disconnected from the power supply and rely on the master microphones 10, 40 for power supply, and have flexible deployment; the digital wireless protocol (such as ≤5ms delay) ensures the synchronization of multi-person dialogue, and has low delay guarantee; at the same time, the system of the present application also has unlimited cascade expansion, supports any number of microphones through master-slave cascade design; adopts full compatible monitoring mode, supports wired (zero delay) and wireless (low delay) monitoring, covers all use scenarios; flexible signal routing, which can freely choose single track mixing, multi-track separation or global mixing monitoring.

[0049] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0050] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. A dual-microphone one-to-four wireless digital signal transmission system, characterized in that: The system comprises: a first microphone, receiving a first external sound signal; a second microphone, receiving a second external sound signal and outputting the signal to the first microphone; a third microphone, receiving a third external sound signal; a fourth microphone, configured to receive a fourth external sound signal, wherein the third microphone outputs the received third external sound signal to the fourth microphone; and The wireless signal receiving module is wirelessly connected to the first microphone and the fourth microphone, and is used to process the received first external sound signal, second external sound signal, third external sound signal and fourth external sound signal, and output the mixed audio signal to an external terminal.

2. The dual-microphone one-to-four wireless digital signal transmission system according to claim 1, characterized in that: The first microphone includes a first sound receiving module, a first input module and a first output module, the first sound receiving module collects the first external sound signal and transmits it to the first output module, and the first input module is connected to the first output module for transmitting the received signal to the first output module; The second microphone includes a second sound receiving module, a second input module, and a second output module. The second sound receiving module collects the second external sound signal and transmits it to the second output module. The second output module is electrically connected to the first input module and transmits the second external sound signal to the first input module. At the same time, the first output module is electrically connected to the second input module and is used to return the signal output by the first microphone to the second microphone. The third microphone includes a third sound receiving module, a third input module and a third output module, the third sound receiving module collects the third external sound signal and transmits it to the third output module, the third input module is connected to the third output module, and is used to transmit the received signal to the third output module; and The fourth microphone includes a fourth sound receiving module, a fourth input module, and a fourth output module. The fourth sound receiving module collects the fourth external sound signal and transmits it to the fourth output module. The third output module is electrically connected to the fourth input module to transmit the third external sound signal to the fourth input module. At the same time, the fourth output module is electrically connected to the third input module to return the signal output by the fourth microphone to the third microphone. The first output module and the fourth output module are both wirelessly connected to the wireless signal receiving module, and are used to output the first external sound signal, the second external sound signal, the third external sound signal and the fourth external sound signal to the wireless signal receiving module.

3. The dual-microphone one-to-four wireless digital signal transmission system according to claim 2, characterized in that: The second output module is electrically connected to the first input module in one direction, and the third output module is electrically connected to the fourth input module in one direction.

4. The dual-microphone one-to-four wireless digital signal transmission system according to claim 3, characterized in that: The unidirectional electrical connection includes a wired XLR interface connection.

5. The dual-microphone one-to-four wireless digital signal transmission system according to claim 3, characterized in that: The first input module, the second input module, the third input module, and the fourth input module are all unidirectional input modules, and the second output module and the third output module are all unidirectional output modules.

6. The dual-microphone one-to-four wireless digital signal transmission system according to claim 5, characterized in that: The first microphone further includes a first processing module connected between the first sound receiving module, the first input module and the first output module, and configured to process the received first external sound signal and the second external sound signal and output them to the first output module; The second microphone further includes a second processing module connected between the second sound receiving module, the second input module and the second output module, and configured to output the received second external sound signal to the second output module; The third microphone further includes a third processing module connected between the third sound receiving module, the third input module and the third output module, and configured to output the received third external sound signal to the second output module; and The fourth microphone further includes a fourth processing module connected between the fourth sound receiving module, the fourth input module and the fourth output module, and configured to process the received third external sound signal and the fourth external sound signal and output them to the fourth output module.

7. The dual-microphone one-to-four wireless digital signal transmission system according to claim 6, characterized in that: The first output module and the fourth output module both include a first wireless output interface and a first wireless receiving interface, wherein the first wireless output interface of the first output module is connected to the first processing module, for outputting the processed first external sound signal and the second external sound signal to the wireless signal receiving module, and the first wireless output interface of the fourth output module is connected to the fourth processing module, for outputting the processed third external sound signal and the fourth external sound signal to the wireless signal receiving module, and the first wireless receiving interface is used to return the audio signal output by the wireless signal receiving module to the first processing module and the fourth processing module.

8. The dual-microphone one-to-four wireless digital signal transmission system according to claim 7, characterized in that: The first microphone includes a first monitoring module connected to the first processing module, and configured to monitor the audio signal returned by the first wireless receiving interface or the first external sound signal; The second microphone includes a second monitoring module connected to the second output module for monitoring the second external sound signal; The third microphone includes a third monitoring module connected to the third output module for monitoring the third external sound signal; as well as The fourth microphone includes a fourth monitoring module, which is connected to the fourth processing module and is used to monitor the audio signal returned by the first wireless receiving interface or the fourth external sound signal.

9. The dual-microphone one-to-four wireless digital signal transmission system according to claim 2, characterized in that: The second output module is bidirectionally electrically connected to the first input module, and the third output module is bidirectionally electrically connected to the fourth input module.

10. The dual-microphone one-to-four wireless digital signal transmission system according to claim 9, characterized in that: The bidirectional electrical connection includes a 3.5mm wired connection, a USB interface connection, or a 2.4GHz wireless connection.

11. The dual-microphone one-to-four wireless digital signal transmission system according to claim 9, characterized in that: The first input module, the second input module, the third input module, and the fourth input module are all bidirectional input modules, and the second output module and the third output module are both bidirectional output modules.

12. The dual-microphone one-to-four wireless digital signal transmission system according to claim 11, characterized in that: The first microphone further includes a first processing module connected between the first sound receiving module, the first input module and the first output module, and configured to process the received first external sound signal and the second external sound signal and output them to the first output module; The second microphone further includes a second processing module connected between the second sound receiving module, the second input module and the second output module, and configured to output the received second external sound signal to the second output module; The third microphone further includes a third processing module connected between the third sound receiving module, the third input module and the third output module, and configured to output the received third external sound signal to the second output module; and The fourth microphone further includes a fourth processing module connected between the fourth sound receiving module, the fourth input module and the fourth output module, and configured to process the received third external sound signal and the fourth external sound signal and output them to the fourth output module.

13. The dual-microphone one-to-four wireless digital signal transmission system according to claim 12, characterized in that: The first output module and the fourth output module both include a first wireless output interface and a first wireless receiving interface, wherein the first wireless output interface of the first output module is connected to the first processing module, and is used to output the processed first external sound signal and the second external sound signal to the wireless signal receiving module; the first wireless output interface of the fourth output module is connected to the fourth processing module, and is used to output the processed third external sound signal and the fourth external sound signal to the wireless signal receiving module; the first wireless receiving interface is used to return the audio signal output by the wireless signal receiving module to the first processing module and the fourth processing module.

14. The dual-microphone one-to-four wireless digital signal transmission system according to claim 13, characterized in that: The second output module and the third output module both include: a wired output interface, configured to transmit the second external sound signal to the first input module or the third external sound signal to the fourth input module; a second wireless output interface, configured to transmit the second external sound signal to the first input module or the third external sound signal to the fourth input module; and The second wireless receiving interface is used to receive the audio signal returned by the first microphone or the fourth microphone, and output the audio signal to the second processing module and the third processing module accordingly.

15. The dual-microphone one-to-four wireless digital signal transmission system according to claim 14, characterized in that: The first microphone includes a first monitoring module connected to the first processing module, and configured to monitor the audio signal returned by the first wireless receiving interface or the first external sound signal; The second microphone includes a second monitoring module connected to the second processing module, and is used to monitor the audio signal returned by the second wireless receiving interface or the second external sound signal; The third microphone includes a third monitoring module connected to the third processing module, and is configured to monitor the audio signal returned by the second wireless receiving interface or the third external sound signal; and The fourth microphone includes a fourth monitoring module connected to the fourth processing module, and is configured to monitor the audio signal returned by the first wireless receiving interface or the fourth external sound signal.

16. The dual-microphone one-to-four wireless digital signal transmission system according to claim 1, characterized in that: The wireless signal receiving module includes: a third wireless receiving interface, connected to the first microphone, and configured to receive a first external sound signal and a second external sound signal output by the first microphone; a fourth wireless receiving interface, connected to the fourth microphone, and configured to receive a third external sound signal and a fourth external sound signal output by the fourth microphone; a fifth processing module, connected to the third wireless receiving interface and the fourth wireless receiving interface, processing the received first external sound signal, the second external sound signal, the third external sound signal, and the fourth external sound signal, and outputting the processed audio signals; a third wireless output interface, connected between the fifth processing module and the first microphone, and transmitting the processed audio signal back to the first microphone; a fourth wireless output interface, connected between the fifth processing module and the fourth microphone, and returning the processed audio signal to the fourth microphone; and The signal transmission module is connected between the fifth processing module and the external terminal, and is used to output the processed audio signal to the external terminal.

17. The dual-microphone one-to-four wireless digital signal transmission system according to claim 16, characterized in that: The wireless signal receiving module is connected to an external earphone for monitoring the processed audio signal.

18. The dual-microphone one-to-four wireless digital signal transmission system according to claim 17, characterized in that: The signal transmission module is connected to the external earphone in a wired manner.

19. The dual-microphone one-to-four wireless digital signal transmission system according to claim 17, characterized in that: The wireless signal receiving module further includes a fifth wireless output interface connected to the fifth processing module and wirelessly connected to the external earphone.

20. An audio system, characterized in that include; The dual-microphone one-to-four wireless digital signal transmission system according to any one of claims 1 to 19; as well as An external device is used to play the audio signal output by the dual-microphone one-to-four wireless digital signal transmission system.

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