Low-delay high-definition wireless microphone transmitting device, receiving device and system

Abstract

According to the low-delay high-definition wireless microphone transmitting device, receiving device and system, a transmitting device Bluetooth module is connected to the data end of a transmitting device central control module, and a transmitting device storage module is connected with the data end of the transmitting device central control module; the transmitting device display screen module is connected with the data end of the transmitting device central control module, the transmitting device key module is connected with the data end of the transmitting device central control module, and the transmitting device microphone module is connected with the data end of the transmitting device central control module. The receiving device Bluetooth module is connected to the data end of the receiving device central control module, the receiving device storage module is connected with the data end of the receiving device central control module, and the receiving device display screen module is connected with the data end of the receiving device central control module. The receiving device key module is connected with the data end of the receiving device central control module, and the receiving device microphone module is connected with the data end of the receiving device central control module.

Description

Technical Field

[0001] The utility model discloses a wireless microphone, especially a low-latency high-definition wireless microphone transmitting device, receiving device and system, belonging to the technical field of small electronic products. Background Art

[0002] A microphone is a device that converts sound signals into electrical signals. Its working principle is to receive sound waves and use different sensors (such as dynamic coil, capacitor, ribbon, etc.) to convert the mechanical energy of sound waves into electrical signals. Microphones are widely used in recording, broadcasting, public speaking, telephones and other occasions that require sound input.

[0003] A wireless microphone is a microphone that does not require a wired connection. It transmits audio signals to a receiver through wireless signals (usually radio frequency). It generally consists of two parts: the microphone itself and a receiver. The main advantage of a wireless microphone is its high degree of freedom of movement, which is suitable for occasions such as speeches, performances, recordings and broadcasts. However, it also has significant disadvantages, such as: long delay time, low communication bit rate, etc. Summary of the Invention

[0004] Aiming at the problems of long delay time and low communication bit rate of the existing wireless microphones in the above-mentioned prior art, the utility model provides a low-latency high-definition wireless microphone transmitting device, receiving device and system. It adopts a central control module with the same configuration in the transmitting device and the receiving device, and is equipped with corresponding peripheral circuits, which can achieve low-latency and high-bit-rate communication.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a low-latency high-definition wireless microphone transmitting device. The transmitting device includes a transmitting device central control module, a transmitting device Bluetooth module, a transmitting device storage module, a transmitting device display screen module, a transmitting device button module, a transmitting device microphone module and a transmitting device power supply module. The transmitting device Bluetooth module is connected to the data terminal of the transmitting device central control module. The transmitting device storage module is connected to the data terminal of the transmitting device central control module. The transmitting device display screen module is connected to the data terminal of the transmitting device central control module. The transmitting device button module is connected to the data terminal of the transmitting device central control module. The transmitting device microphone module is connected to the data terminal of the transmitting device central control module. The transmitting device power supply module is used to supply power to the transmitting device.

[0006] A low-latency high-definition wireless microphone receiving device, the receiving device includes a receiving device central control module, a receiving device Bluetooth module, a receiving device storage module, a receiving device display screen module, a receiving device button module, a receiving device audio module and a receiving device power module. The receiving device Bluetooth module is connected to the data end of the receiving device central control module. The receiving device storage module is connected to the data end of the receiving device central control module. The receiving device display screen module is connected to the data end of the receiving device central control module. The receiving device button module is connected to the data end of the receiving device central control module. The receiving device microphone module is connected to the data end of the receiving device central control module. The receiving device power module is used to supply power to the receiving device.

[0007] A low-latency high-definition wireless microphone system, the system includes more than one transmitting device and more than one receiving device, and the transmitting device and the receiving device are connected via Bluetooth.

[0008] The technical solution adopted by the present utility model to solve its technical problems further includes:

[0009] A high-performance audio codec U7000 is connected to the microphone interface of the transmitting device central control module. An audio interface J7000 for plugging in an external audio device is connected to the audio input interface of the high-performance audio codec U7000. A microphone pad TP7000 is also connected to the audio input interface of the high-performance audio codec U7000. The audio interface J7000 and the microphone pad TP7000 are respectively connected to a TVS diode to the ground.

[0010] The Bluetooth module of the transmitting device uses a Bluetooth system chip U6300. The Bluetooth system chip U6300 is connected to the transmitting device central control module via an SPI bus. A Bluetooth audio module U6301 is connected to the RF interface of the Bluetooth system chip U6300. A Bluetooth antenna is connected to the Bluetooth audio module U6301.

[0011] The storage module of the transmitting device includes an eMMC Flash chip U4100A and an SPI Flash chip U4000. The eMMC Flash chip U4100A and the SPI Flash chip U4000 are respectively connected to the central control module of the transmitting device. The button module of the transmitting device includes a mute button and a recording button. The mute button and the recording button are respectively connected to the data terminal of the central control module of the transmitting device. TVS diodes are respectively connected between the mute button and the recording button and the ground. An indicator light module of the transmitting device is connected to the central control module of the transmitting device. The indicator light module of the transmitting device includes a charging indicator light, a power-on indicator light, and a recording indicator light. The charging indicator light, the power-on indicator light, and the recording indicator light are respectively connected to corresponding interfaces of the central control module of the transmitting device. The display screen module of the transmitting device includes an LCD display screen interface U5100, a display screen enabling unit, and a display screen backlight unit. The LCD display screen interface U5100 is connected to the central control module of the transmitting device through an SPI bus. The display screen enabling unit uses a MOS transistor Q5100. The gate of the MOS transistor Q5100 is connected to the data terminal of the central control module of the transmitting device. The display screen backlight unit uses a triode Q5101. The base of the triode Q5101 is connected to the data terminal of the central control module of the transmitting device.

[0012] The power supply module of the transmitting device includes a USB interface of the transmitting device, a first voltage stabilizing module, a second voltage stabilizing module, a third voltage stabilizing module, a fourth voltage stabilizing module, a power switch module, a battery monitoring module, and a charge and discharge management module. The transmitting device is powered by the USB interface of the transmitting device. The power input terminal of the charge and discharge management module is connected to the power terminal of the USB interface of the transmitting device. The power output terminal of the charge and discharge management module is connected to a lithium battery. The power terminal of the battery monitoring module is connected to the lithium battery. The signal terminal of the battery monitoring module is connected to the central control module of the transmitting device through an I2C bus. The power switch module is connected between the lithium battery and the central control module of the transmitting device. The power input terminals of the first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module are respectively connected to the lithium battery. The first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module use different voltage stabilizing chips. The first voltage stabilizing module converts the power output by the lithium battery into a +1.8V power supply for power supply. The second voltage stabilizing module converts the power output by the lithium battery into a +0.96V power supply for power supply. The third voltage stabilizing module converts the power output by the lithium battery into a +3.33V power supply for power supply. The fourth voltage stabilizing module converts the power output by the lithium battery into a +3.3V power supply for power supply.

[0013] A high-performance audio codec U7100 is connected to the audio interface of the central control module of the receiving device. A headphone interface of the receiving device and an audio interface of the receiving device are connected to the audio output interface of the high-performance audio codec U7100.

[0014] The Bluetooth module of the receiving device uses the Bluetooth system chip U6300. The Bluetooth system chip U6300 is connected to the central control module of the receiving device through the SPI bus. A Bluetooth audio module U6301 is connected to the RF interface of the Bluetooth system chip U6300, and a Bluetooth antenna is connected to the Bluetooth audio module U6301. The display screen module of the receiving device includes an LCD display screen interface U5100, a display screen enabling unit, and a display screen backlight unit. The LCD display screen interface U5100 is connected to the central control module of the receiving device through the SPI bus. The display screen enabling unit uses a MOS transistor Q5100, and the gate of the MOS transistor Q5100 is connected to the data terminal of the central control module of the receiving device. The display screen backlight unit uses a triode Q5101, and the base of the triode Q5101 is connected to the data terminal of the central control module of the receiving device.

[0015] The key module of the receiving device includes a power switch key, a mute key, and a recording key. The power switch key, the mute key, and the recording key are respectively connected to the data terminal of the central control module of the receiving device. TVS diodes are respectively connected between the power switch key, the mute key, and the recording key and the ground. An indicator module of the receiving device is connected to the central control module of the receiving device. The indicator module of the receiving device includes a charging indicator and a power-on indicator. The charging indicator and the power-on indicator are respectively connected to the corresponding interfaces of the central control module of the receiving device. The power supply module of the receiving device includes a USB interface of the receiving device, a first voltage stabilizing module, a second voltage stabilizing module, a third voltage stabilizing module, a fourth voltage stabilizing module, a power switch module, a battery monitoring module, and a charge and discharge management module. The receiving device is powered by the USB interface of the receiving device. The power input terminal of the charge and discharge management module is connected to the power terminal of the USB interface of the receiving device. The power output terminal of the charge and discharge management module is connected to the lithium battery. The power terminal of the battery monitoring module is connected to the lithium battery. The signal terminal of the battery monitoring module is connected to the central control module of the receiving device through the I2C bus. The power switch module is connected between the lithium battery and the central control module of the receiving device. The power input terminals of the first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module are respectively connected to the lithium battery. The first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module use different voltage stabilizing chips. The first voltage stabilizing module converts the power output by the lithium battery into a +1.8V power supply for power supply. The second voltage stabilizing module converts the power output by the lithium battery into a +0.96V power supply for power supply. The third voltage stabilizing module converts the power output by the lithium battery into a +3.33V power supply for power supply. The fourth voltage stabilizing module converts the power output by the lithium battery into a +3.3V power supply for power supply.

[0016] The beneficial effects of the present utility model are as follows: The present utility model can achieve low-latency and high-definition calls. The low latency can reach 6 - 8 ms, the high-definition large bitrate recording reaches 24 bit / 48 - 96 kHz, the effective transmission distance can reach more than 100 m, and it can achieve high-efficiency LC3+ audio encoding and decoding, dual antennas, HIFI DSP, and two transmissions and one reception.

[0017] The present utility model is internally provided with a high-performance stereo ADC / DAC, supports the IIS audio interface, the sampling rate supports up to 192K at most, and supports the echo cancellation and noise reduction algorithms for microphone calls. By adopting the high-bandwidth wireless transmission technology and audio compression and decompression algorithms, it can ensure the stable transmission of high-quality audio signals and can achieve an ultra-low latency experience within 6 - 10 ms.

[0018] The following will further illustrate the present utility model in conjunction with the attached drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the circuit block diagram of the transmitting device of the present utility model.

[0020] Figure 2 It is the partial circuit schematic diagram of the first voltage stabilization module in the transmitting device of the present utility model.

[0021] Figure 3 It is the partial circuit schematic diagram of the second voltage stabilization module in the transmitting device of the present utility model.

[0022] Figure 4 It is the partial circuit schematic diagram of the third voltage stabilization module in the transmitting device of the present utility model.

[0023] Figure 5 It is the partial circuit schematic diagram of the fourth voltage stabilization module in the transmitting device of the present utility model.

[0024] Figure 6 It is the partial circuit schematic diagram of the power switch in the transmitting device of the present utility model.

[0025] Figure 7 It is the partial circuit schematic diagram of the battery monitoring module and the charge and discharge management module in the transmitting device of the present utility model.

[0026] Figure 8 It is the partial circuit schematic diagram of the power supply and ground interface of the central control module of the transmitting device of the present utility model.

[0027] Figure 9 It is the partial circuit schematic diagram of the clock interface and USB interface of the central control module of the transmitting device of the present utility model.

[0028] Figure 10 It is the partial circuit schematic diagram of the general I / O interface of the central control module of the transmitting device of the present utility model.

[0029] Figure 11 This is the circuit schematic diagram of the microphone input interface part of the central control module of the transmitting device of the present utility model.

[0030] Figure 12 This is the circuit schematic diagram of the USB interface part in the transmitting device of the present utility model.

[0031] Figure 13 This is the circuit schematic diagram of the SPI storage module part in the transmitting device of the present utility model.

[0032] Figure 14 This is the circuit schematic diagram of the eMMC storage module part in the transmitting device of the present utility model.

[0033] Figure 15 This is the circuit schematic diagram of the display screen interface part in the transmitting device of the present utility model.

[0034] Figure 16 This is the circuit schematic diagram of the Bluetooth module part in the transmitting device of the present utility model.

[0035] Figure 17 This is the circuit schematic diagram of the antenna part in the transmitting device of the present utility model.

[0036] Figure 18 This is the circuit schematic diagram of the audio codec module part in the transmitting device of the present utility model.

[0037] Figure 19 This is the circuit schematic diagram of the audio interface part in the transmitting device of the present utility model.

[0038] Figure 20 This is the circuit schematic diagram of the key module and indicator light module part in the transmitting device of the present utility model.

[0039] Figure 21 This is the circuit schematic diagram of the test module part in the transmitting device of the present utility model.

[0040] Figure 22 This is the circuit block diagram of the receiving device of the present utility model.

[0041] Figure 23 This is the circuit schematic diagram of the first voltage stabilization module part in the receiving device of the present utility model.

[0042] Figure 24 This is the circuit schematic diagram of the second voltage stabilization module part in the receiving device of the present utility model.

[0043] Figure 25 This is the circuit schematic diagram of the third voltage stabilization module part in the receiving device of the present utility model.

[0044] Figure 26This is the schematic diagram of a partial circuit of the fourth voltage stabilization module in the receiving device of the present utility model.

[0045] Figure 27 This is the schematic diagram of a partial circuit of the power switch in the receiving device of the present utility model.

[0046] Figure 28 This is the schematic diagram of a partial circuit of the battery monitoring module and the charge and discharge management module in the receiving device of the present utility model.

[0047] Figure 29 This is the schematic diagram of a partial circuit of the power supply and ground interface of the central control module of the receiving device of the present utility model.

[0048] Figure 30 This is the schematic diagram of a partial circuit of the clock interface and the USB interface of the central control module of the receiving device of the present utility model.

[0049] Figure 31 This is the schematic diagram of a partial circuit of the general-purpose I / O interface of the central control module of the receiving device of the present utility model.

[0050] Figure 32 This is the schematic diagram of a partial circuit of the microphone input interface of the central control module of the receiving device of the present utility model.

[0051] Figure 33 This is the schematic diagram of a partial circuit of the USB interface in the receiving device of the present utility model.

[0052] Figure 34 This is the schematic diagram of a partial circuit of the SPI storage module in the receiving device of the present utility model.

[0053] Figure 35 This is the schematic diagram of a partial circuit of the display screen interface in the receiving device of the present utility model.

[0054] Figure 36 This is the schematic diagram of a partial circuit of the Bluetooth module in the receiving device of the present utility model.

[0055] Figure 37 This is the schematic diagram of a partial circuit of the antenna in the receiving device of the present utility model.

[0056] Figure 38 This is the schematic diagram of a partial circuit of the audio codec module in the receiving device of the present utility model.

[0057] Figure 39 This is the schematic diagram of a partial circuit of the audio interface in the receiving device of the present utility model.

[0058] Figure 40 This is the schematic diagram of a partial circuit of the button module and the indicator light module in the receiving device of the present utility model.

[0059] Figure 41This is the schematic diagram of the partial circuit of the test module in the receiving device of the present utility model. Detailed implementation manner

[0060] This embodiment is the preferred implementation manner of the present utility model. All others with the same or similar principles and basic structures as this embodiment are within the protection scope of the present utility model.

[0061] Please refer to the attached Figure 1 to the attached Figure 21 For a low-latency high-definition wireless microphone transmitting device of the present utility model, it mainly includes a transmitting device central control module, a transmitting device Bluetooth module, a transmitting device storage module, a transmitting device display screen module, a transmitting device key module, a transmitting device microphone module, and a transmitting device power supply module. The transmitting device Bluetooth module is connected to the data terminal of the transmitting device central control module and is used for wireless signal transmission with the receiving device through the transmitting device Bluetooth module. The transmitting device storage module is connected to the data terminal of the transmitting device central control module and is used for data storage. The transmitting device display screen module is connected to the data terminal of the transmitting device central control module and is used for displaying status information or data information of the transmitting device part through the display module, etc. The transmitting device key module is connected to the data terminal of the transmitting device central control module and is used for outputting power-on / off information or control information, etc., through the keys. The transmitting device microphone module is connected to the data terminal of the transmitting device central control module and is used for collecting audio data and transmitting the collected audio data to the transmitting device central control module. The transmitting device power supply module is used for supplying power to the transmitting device.

[0062] In this embodiment, the transmitting device central control module uses an audio processing chip U1000D with data processing function and model number RK2108. Specifically in implementation, other models of audio processing chips can also be selected for replacement. A 24MHz quartz crystal oscillator Y1100 is connected to the clock interface of the audio processing chip U1000D.

[0063] The central control module of the transmitting device is provided with two groups of dedicated microphone interfaces. In this embodiment, only the first group is adopted, and the second group is in a floating state. In specific implementation, only the second group can also be adopted or both groups can be adopted simultaneously. A high-performance audio codec U7000 is connected to the microphone interface of the central control module of the transmitting device. In this embodiment, the high-performance audio codec U7000 uses a high-performance audio codec chip with the model ES7243L. In specific implementation, other models of audio codec chips can also be used for replacement. An audio interface J7000 is connected to the audio input interface of the high-performance audio codec U7000 for plugging in an external audio device. A microphone pad TP7000 is also connected to the audio input interface of the high-performance audio codec U7000 for soldering a microphone. In this embodiment, TVS diodes are respectively connected to the ground for the audio interface J7000 and the microphone pad TP7000.

[0064] In this embodiment, the Bluetooth module of the transmitting device uses a Bluetooth system chip U6300. The Bluetooth system chip U6300 uses a Bluetooth system chip with the model nRF52810. In specific implementation, other models of Bluetooth system chips can also be selected for replacement. The Bluetooth system chip U6300 is connected to the central control module of the transmitting device through an SPI bus. A Bluetooth audio module U6301 is connected to the RF interface of the Bluetooth system chip U6300. In this embodiment, the Bluetooth audio module U6301 uses a Bluetooth audio chip with the model BHWM257. In specific implementation, other models of Bluetooth audio chips can also be selected for replacement. A Bluetooth antenna is connected to the Bluetooth audio module U6301.

[0065] In this embodiment, the storage module of the transmitting device includes an eMMC Flash chip U4100A and an SPI Flash chip U4000. The eMMC Flash chip U4100A and the SPI Flash chip U4000 are respectively connected to the central control module of the transmitting device.

[0066] In this embodiment, the display screen module of the transmitting device includes an LCD display screen interface U5100, a display screen enabling unit, and a display screen backlight unit. The LCD display screen interface U5100 is connected to the central control module of the transmitting device through an SPI bus. The display screen enabling unit uses a MOS transistor Q5100. The gate of the MOS transistor Q5100 is connected to the data terminal of the central control module of the transmitting device. The power-on of the LCD display screen interface U5100 is controlled by the central control module of the transmitting device. The display screen backlight unit uses a triode Q5101. The base of the triode Q5101 is connected to the data terminal of the central control module of the transmitting device. The power-on of the backlight module of the LCD display screen interface U5100 is controlled by the central control module of the transmitting device. In this embodiment, a TVS diode is connected to the ground for the power supply port of the LCD display screen interface U5100.

[0067] In this embodiment, the button module of the transmitting device includes a mute button and a recording button. The mute button and the recording button are respectively connected to the data terminals of the central control module of the transmitting device. TVS diodes are respectively connected between the mute button and the recording button and the ground.

[0068] In this embodiment, an indicator module of the transmitting device is connected to the central control module of the transmitting device. The indicator module of the transmitting device includes a charging indicator, a power-on indicator, and a recording indicator. The charging indicator, the power-on indicator, and the recording indicator are respectively connected to corresponding interfaces of the central control module of the transmitting device, and can respectively indicate the charging state, the power-on / off state, and the recording state.

[0069] In this embodiment, the power supply module of the transmitting device includes a USB interface of the transmitting device, a first voltage stabilizing module, a second voltage stabilizing module, a third voltage stabilizing module, a fourth voltage stabilizing module, a power switch module, a battery monitoring module, and a charge and discharge management module. The transmitting device is powered by the USB interface of the transmitting device. In this embodiment, the USB interface of the transmitting device uses a TYPE_C interface. Specifically, other interfaces can also be selected during implementation. The power input terminal of the charge and discharge management module is connected to the power terminal of the USB interface of the transmitting device, and the power output terminal of the charge and discharge management module is connected to the lithium battery. The charge and discharge of the lithium battery can be managed through the charge and discharge management module. The power terminal of the battery monitoring module is connected to the lithium battery, and the signal terminal of the battery monitoring module is connected to the central control module of the transmitting device through the I2C bus. Data of the lithium battery is collected by the battery monitoring module and output to the central control module of the transmitting device. The power switch module is connected between the lithium battery and the central control module of the transmitting device, and the power supply of the lithium battery to the central control module of the transmitting device is controlled through the power switch module. The power input terminals of the first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module are respectively connected to the lithium battery. The first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module use different voltage stabilizing chips. The first voltage stabilizing module converts the power output by the lithium battery into a +1.8V power supply for power supply, the second voltage stabilizing module converts the power output by the lithium battery into a +0.96V power supply for power supply, the third voltage stabilizing module converts the power output by the lithium battery into a +3.33V power supply for power supply, and the fourth voltage stabilizing module converts the power output by the lithium battery into a +3.3V power supply for power supply.

[0070] In this embodiment, a modulation module of the transmitting device is connected to the central control module of the transmitting device. The modulation module of the transmitting device is connected to the asynchronous serial interface of the central control module of the transmitting device for debugging. TVS diodes are respectively connected between the asynchronous serial interface of the central control module of the transmitting device and the ground.

[0071] Please refer to Appendix Figure 22 to Appendix Figure 41, the present utility model also protects a low-latency high-definition wireless microphone receiving device, which mainly includes a receiving device central control module, a receiving device Bluetooth module, a receiving device storage module, a receiving device display screen module, a receiving device button module, a receiving device audio module, and a receiving device power module. The receiving device Bluetooth module is connected to the data terminal of the receiving device central control module and is used for wireless signal transmission with the transmitting device through the receiving device Bluetooth module. The receiving device storage module is connected to the data terminal of the receiving device central control module and is used for data storage. The receiving device display screen module is connected to the data terminal of the receiving device central control module and is used for displaying status information or data information of the receiving device part through the display module, etc. The receiving device button module is connected to the data terminal of the receiving device central control module and is used for outputting power-on / off information or control information, etc., through the button. The receiving device microphone module is connected to the data terminal of the receiving device central control module and is used for collecting audio data and transmitting the collected audio data to the receiving device central control module. The receiving device power module is used to supply power to the receiving device.

[0072] In this embodiment, the receiving device central control module uses an audio processing chip U1000B with data processing function and model number RK2108. Specifically in implementation, other models of audio processing chips can also be selected to replace it. A 24MHz crystal oscillator Y1100 is connected to the clock interface of the audio processing chip U1000B.

[0073] A high-performance audio codec U7100 is connected to the audio interface of the receiving device central control module. In this embodiment, the high-performance audio codec U7100 uses a high-performance audio codec chip with model number ES8388. Specifically in implementation, other models of audio codec chips can also be used to replace it. A receiving device headphone interface and a receiving device audio interface are connected to the audio output interface of the high-performance audio codec U7100, which are respectively used for plugging in headphones and audio devices. In this embodiment, TVS diodes are respectively connected to the ground for the receiving device headphone interface and the receiving device audio interface.

[0074] In this embodiment, the receiving device Bluetooth module uses a Bluetooth system chip U6300. The Bluetooth system chip U6300 uses a Bluetooth system chip with model number nRF52810. Specifically in implementation, other models of Bluetooth system chips can also be selected to replace it. The Bluetooth system chip U6300 is connected to the receiving device central control module through the SPI bus. A Bluetooth audio module U6301 is connected to the RF interface of the Bluetooth system chip U6300. In this embodiment, the Bluetooth audio module U6301 uses a Bluetooth audio chip with model number BHWM257. Specifically in implementation, other models of Bluetooth audio chips can also be selected to replace it. A Bluetooth antenna is connected to the Bluetooth audio module U6301.

[0075] In this embodiment, the storage module of the receiving device uses the SPI Flash chip U4000, and the SPI Flash chip U4000 is respectively connected to the central control module of the receiving device.

[0076] In this embodiment, the display screen module of the receiving device includes an LCD display screen interface U5100, a display screen enabling unit, and a display screen backlight unit. The LCD display screen interface U5100 is connected to the central control module of the receiving device through the SPI bus. The display screen enabling unit uses the MOS transistor Q5100, and the gate of the MOS transistor Q5100 is connected to the data terminal of the central control module of the receiving device. The power-on of the LCD display screen interface U5100 is controlled by the central control module of the receiving device. The display screen backlight unit uses the triode Q5101, and the base of the triode Q5101 is connected to the data terminal of the central control module of the receiving device. The power-on of the backlight module of the LCD display screen interface U5100 is controlled by the central control module of the receiving device. In this embodiment, a TVS diode is connected between the power supply port of the LCD display screen interface U5100 and the ground.

[0077] In this embodiment, the button module of the receiving device includes a power switch button, a mute button, and a recording button. The power switch button, the mute button, and the recording button are respectively connected to the data terminal of the central control module of the receiving device, and TVS diodes are respectively connected between the power switch button, the mute button, and the recording button and the ground.

[0078] In this embodiment, an indicator light module of the receiving device is connected to the central control module of the receiving device. The indicator light module of the receiving device includes a charging indicator light and a power-on indicator light. The charging indicator light and the power-on indicator light are respectively connected to corresponding interfaces of the central control module of the receiving device, and can respectively indicate the charging state and the power-on / off state.

[0079] In this embodiment, the power supply module of the receiving device includes a USB interface of the receiving device, a first voltage stabilizing module, a second voltage stabilizing module, a third voltage stabilizing module, a fourth voltage stabilizing module, a power switch module, a battery monitoring module, and a charge and discharge management module. The receiving device is powered by the USB interface of the receiving device. In this embodiment, the USB interface of the receiving device uses a TYPE_C interface. Specifically, other interfaces can also be selected during implementation. The power input terminal of the charge and discharge management module is connected to the power terminal of the USB interface of the receiving device, and the power output terminal of the charge and discharge management module is connected to the lithium battery. The charge and discharge of the lithium battery can be managed through the charge and discharge management module. The power terminal of the battery monitoring module is connected to the lithium battery, and the signal terminal of the battery monitoring module is connected to the central control module of the receiving device through the I2C bus. The data of the lithium battery is collected by the battery monitoring module and output to the central control module of the receiving device. The power switch module is connected between the lithium battery and the central control module of the receiving device, and the power supply of the lithium battery to the central control module of the receiving device is controlled through the power switch module. The power input terminals of the first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module are respectively connected to the lithium battery. The first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module use different voltage stabilizing chips. The first voltage stabilizing module converts the power output by the lithium battery into a +1.8V power supply for power supply, the second voltage stabilizing module converts the power output by the lithium battery into a +0.96V power supply for power supply, the third voltage stabilizing module converts the power output by the lithium battery into a +3.33V power supply for power supply, and the fourth voltage stabilizing module converts the power output by the lithium battery into a +3.3V power supply for power supply.

[0080] In this embodiment, a receiving device modulation module is connected to the central control module of the receiving device. The receiving device modulation module is connected to the asynchronous serial interface of the central control module of the receiving device and is used for debugging. TVS diodes are respectively connected between the asynchronous serial interface of the central control module of the receiving device and the ground.

[0081] The present utility model also protects a low-latency high-definition wireless microphone system, which includes more than one transmitting device and more than one receiving device. The transmitting device and the receiving device are connected through Bluetooth.

[0082] The present utility model can achieve low latency and high-definition calls. The low latency can reach 6 - 8ms, the high-definition large bitrate recording reaches 24bit / 48 - 96kHz, the effective transmission distance can reach more than 100m, and it can also achieve high-efficiency LC3+ audio codec, dual antennas, HIFI DSP, and two transmitters and one receiver.

[0083] This utility model is built-in with a high-performance stereo ADC / DAC, supports the IIS audio interface, has a maximum sampling rate of up to 192K, and supports echo cancellation and noise reduction algorithms for microphone calls. It adopts high-bandwidth wireless transmission technology and audio compression and decompression algorithms, which can ensure the stable transmission of high-quality audio signals and can achieve an ultra-low latency experience within 6 - 10 ms.

Claims

1. A low-latency high-definition wireless microphone transmitting device, characterized in that: The described transmitting device includes a central control module of the transmitting device, a Bluetooth module of the transmitting device, a storage module of the transmitting device, a display screen module of the transmitting device, a key module of the transmitting device, a microphone module of the transmitting device, and a power supply module of the transmitting device. The Bluetooth module of the transmitting device is connected to the data terminal of the central control module of the transmitting device. The storage module of the transmitting device is connected to the data terminal of the central control module of the transmitting device. The display screen module of the transmitting device is connected to the data terminal of the central control module of the transmitting device. The key module of the transmitting device is connected to the data terminal of the central control module of the transmitting device. The microphone module of the transmitting device is connected to the data terminal of the central control module of the transmitting device. The power supply module of the transmitting device is used to supply power to the transmitting device.

2. The low-latency high-definition wireless microphone transmitting device according to claim 1, characterized in that: A high-performance audio codec U7000 is connected to the microphone interface of the central control module of the transmitting device. An audio interface J7000 for plugging in an external audio device is connected to the audio input interface of the high-performance audio codec U7000. A microphone pad TP7000 is also connected to the audio input interface of the high-performance audio codec U7000. The audio interface J7000 and the microphone pad TP7000 are respectively connected to a TVS diode to the ground.

3. The low-latency high-definition wireless microphone transmitting device according to claim 1, characterized in that: The Bluetooth module of the transmitting device uses a Bluetooth system chip U6300. The Bluetooth system chip U6300 is connected to the central control module of the transmitting device through an SPI bus. A Bluetooth audio module U6301 is connected to the RF interface of the Bluetooth system chip U6300. A Bluetooth antenna is connected to the Bluetooth audio module U6301.

4. The low-latency high-definition wireless microphone transmitting device according to claim 1, characterized in that: The storage module of the transmitting device includes an eMMC Flash chip U4100A and an SPI Flash chip U4000. The eMMC Flash chip U4100A and the SPI Flash chip U4000 are respectively connected to the central control module of the transmitting device. The key module of the transmitting device includes a mute key and a recording key. The mute key and the recording key are respectively connected to the data terminal of the central control module of the transmitting device. The mute key and the recording key are respectively connected to a TVS diode to the ground. An indicator module of the transmitting device is connected to the central control module of the transmitting device. The indicator module of the transmitting device includes a charging indicator, a power-on indicator, and a recording indicator. The charging indicator, the power-on indicator, and the recording indicator are respectively connected to corresponding interfaces of the central control module of the transmitting device. The display screen module of the transmitting device includes an LCD display screen interface U5100, a display screen enabling unit, and a display screen backlight unit. The LCD display screen interface U5100 is connected to the central control module of the transmitting device through an SPI bus. The display screen enabling unit uses a MOS transistor Q5100. The gate of the MOS transistor Q5100 is connected to the data terminal of the central control module of the transmitting device. The display screen backlight unit uses a triode Q5101. The base of the triode Q5101 is connected to the data terminal of the central control module of the transmitting device.

5. The low-latency high-definition wireless microphone transmitting device according to claim 1, characterized in that: The power supply module of the transmitting device includes a transmitting device USB interface, a first voltage stabilizing module, a second voltage stabilizing module, a third voltage stabilizing module, a fourth voltage stabilizing module, a power switch module, a battery monitoring module, and a charge and discharge management module. The transmitting device is powered by the transmitting device USB interface. The power input terminal of the charge and discharge management module is connected to the power terminal of the transmitting device USB interface. The power output terminal of the charge and discharge management module is connected to the lithium battery. The power terminal of the battery monitoring module is connected to the lithium battery. The signal terminal of the battery monitoring module is connected to the central control module of the transmitting device through the I2C bus. The power switch module is connected between the lithium battery and the central control module of the transmitting device. The power input terminals of the first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module are respectively connected to the lithium battery. The first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module use different voltage stabilizing chips. The first voltage stabilizing module converts the power output from the lithium battery into a +1.8V power supply for power supply. The second voltage stabilizing module converts the power output from the lithium battery into a +0.96V power supply for power supply. The third voltage stabilizing module converts the power output from the lithium battery into a +3.33V power supply for power supply. The fourth voltage stabilizing module converts the power output from the lithium battery into a +3.3V power supply for power supply.

6. A low-latency high-definition wireless microphone receiving device, characterized in that: The receiving device includes a receiving device central control module, a receiving device Bluetooth module, a receiving device storage module, a receiving device display screen module, a receiving device button module, a receiving device audio module, and a receiving device power supply module. The receiving device Bluetooth module is connected to the data terminal of the receiving device central control module. The receiving device storage module is connected to the data terminal of the receiving device central control module. The receiving device display screen module is connected to the data terminal of the receiving device central control module. The receiving device button module is connected to the data terminal of the receiving device central control module. The receiving device microphone module is connected to the data terminal of the receiving device central control module. The receiving device power supply module is used to supply power to the receiving device.

7. The low-latency high-definition wireless microphone receiving device according to claim 6, wherein: A high-performance audio codec U7100 is connected to the audio interface of the receiving device central control module. A receiving device headphone interface and a receiving device audio interface are connected to the audio output interface of the high-performance audio codec U7100.

8. The low-latency high-definition wireless microphone receiving device according to claim 6, wherein: The receiving device Bluetooth module uses a Bluetooth system chip U6300. The Bluetooth system chip U6300 is connected to the receiving device central control module through the SPI bus. A Bluetooth audio module U6301 is connected to the RF interface of the Bluetooth system chip U6300. A Bluetooth antenna is connected to the Bluetooth audio module U6301. The receiving device display screen module includes an LCD display screen interface U5100, a display screen enabling unit, and a display screen backlight unit. The LCD display screen interface U5100 is connected to the receiving device central control module through the SPI bus. The display screen enabling unit uses a MOS transistor Q5100. The gate of the MOS transistor Q5100 is connected to the data terminal of the receiving device central control module. The display screen backlight unit uses a triode Q5101. The base of the triode Q5101 is connected to the data terminal of the receiving device central control module.

9. The low-latency high-definition wireless microphone receiving device according to claim 6, characterized in that: The receiving device button module described above includes a switch button, a mute button, and a recording button. The switch button, the mute button, and the recording button are respectively connected to the data terminals of the central control module of the receiving device. TVS diodes are respectively connected between the switch button, the mute button, and the recording button and the ground. A receiving device indicator module is connected to the central control module of the receiving device. The receiving device indicator module includes a charging indicator and a power-on indicator. The charging indicator and the power-on indicator are respectively connected to corresponding interfaces of the central control module of the receiving device. The power supply module of the receiving device includes a receiving device USB interface, a first voltage stabilizing module, a second voltage stabilizing module, a third voltage stabilizing module, a fourth voltage stabilizing module, a power switch module, a battery monitoring module, and a charge and discharge management module. The receiving device is powered by the receiving device USB interface. The power input terminal of the charge and discharge management module is connected to the power terminal of the receiving device USB interface. The power output terminal of the charge and discharge management module is connected to the lithium battery. The power terminal of the battery monitoring module is connected to the lithium battery. The signal terminal of the battery monitoring module is connected to the central control module of the receiving device through the I2C bus. The power switch module is connected between the lithium battery and the central control module of the receiving device. The power input terminals of the first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module are respectively connected to the lithium battery. The first voltage stabilizing module, the second voltage stabilizing module, the third voltage stabilizing module, and the fourth voltage stabilizing module use different voltage stabilizing chips. The first voltage stabilizing module converts the power output by the lithium battery into a +1.8V power supply for power supply. The second voltage stabilizing module converts the power output by the lithium battery into a +0.96V power supply for power supply. The third voltage stabilizing module converts the power output by the lithium battery into a +3.33V power supply for power supply. The fourth voltage stabilizing module converts the power output by the lithium battery into a +3.3V power supply for power supply.

10. A low-latency high-definition wireless microphone system, characterized in that: The system described above includes more than one low-latency high-definition wireless microphone transmitting device as described in any one of claims 1 to 5 and more than one low-latency high-definition wireless microphone receiving device as described in any one of claims 6 to 9. The transmitting device and the receiving device are connected through Bluetooth.

Images