Multifunctional UWB dual-frequency wireless pickup

Abstract

The utility model relates to the technical field of sound pickups, and discloses a multifunctional UWB dual-frequency wireless sound pickup, which comprises a transmitting end circuit and a receiving end circuit, the transmitting end circuit comprises a transmitting end ADC (Analog to Digital Converter) circuit for encoding data, an earphone circuit for monitoring the data, a transmitting end MCU (Microprogrammed Control Unit) circuit for processing the data, a transmitting end encoding circuit for encoding the data, a transmitting end display circuit for displaying the transmitting end and a transmitting end radio frequency amplification circuit. An audio is transmitted by adopting a high-bandwidth and low-delay UWB (Ultra Wideband) wireless scheme, so that lossless tone quality transmission at a Hi-Res Wireless Audio level can be realized; the audio transmission is not compressed, the compression and decompression processes are avoided, the delay is shorter, and the stable high-definition audio transmission less than 6mS can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of microphones, in particular to a multifunctional UWB dual-frequency wireless microphone. Background Art

[0002] A pickup, also known as a monitoring head, is a device used to collect ambient sound from a live event and transmit it to backend equipment. It consists of a microphone and an audio amplifier circuit. Pickups are generally categorized as digital or analog. Digital pickups are sound sensors that convert analog audio signals into digital signals through a digital signal processing system and then perform the corresponding digital signal processing. Analog pickups use conventional analog circuits to amplify the sound captured by the microphone. Pickups come in either three-wire or four-wire configurations. Three-wire pickups typically have red for the positive power supply, white for the positive audio signal, and black for the negative signal and power supply terminals. Four-wire pickups typically have red for the positive power supply, white for the positive audio signal, and separate negative audio and power supply terminals. Pickup products are generally divided into active and passive types. They are categorized by performance into acoustic guitar and monitoring pickups. Wireless pickups are used to replace traditional audio transmission cables, allowing for greater flexibility and freedom in audio transmission.

[0003] Conventional wireless audio pickups utilize UHF or 2.4GHz wireless transmission modes. Due to bandwidth limitations, these modes are unable to transmit Hi-Res Wireless Audio-grade lossless high-definition audio. Both require some compression to ensure the data stream meets the required bandwidth. This compression process increases transmission latency and also compromises signal quality, reducing sound quality. Utility Model Content

[0004] The purpose of the present utility model is to provide a multifunctional UWB dual-frequency wireless microphone to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a multifunctional UWB dual-band wireless microphone, comprising a transmitting circuit and a receiving circuit, wherein the transmitting circuit comprises:

[0006] A transmitter ADC circuit for encoding data, a headphone circuit for monitoring data, a transmitter MCU circuit for processing data, a transmitter encoding circuit for encoding data, a transmitter display circuit for displaying data, and a transmitter RF amplifier circuit;

[0007] The receiving end circuit includes:

[0008] A receiving end RF circuit for receiving data, a receiving end MCU circuit for processing data, a receiving end decoding circuit for decoding data, a receiving end display circuit for displaying the receiving end, a receiving end output circuit for audio output, and a receiving end monitoring headphone circuit.

[0009] Optionally, the transmitting end ADC circuit includes an audio analog-to-digital conversion chip U7, and the transmitting end MCU circuit includes a transmitting end MCU chip U5. The audio analog-to-digital conversion chip U7 collects the audio signal generated by the musical instrument and converts it into a digital signal in IIS format and transmits it to the transmitting end MCU chip U5.

[0010] Optionally, the transmitting end earphone circuit includes an audio processing chip U8, and the transmitting end MCU chip U5 packages the received digital audio signal according to the rate requirement of the UWB chip U11 and transmits it to the UWB chip U11 via the SPI interface. The U11 sends the signal using a UWB wireless signal.

[0011] Optionally, the receiving-end MCU circuit includes a receiving-end MCU chip U5, and the UWB chip U11 transmits the signal to the receiving-end MCU chip U5 on the receiving end through the SPI interface.

[0012] Optionally, the receiving end output circuit includes an audio analog-to-digital conversion chip U15. The signal of the receiving end MCU chip U5 is sent to the audio analog-to-digital conversion chip U15 in IIS format according to the requirements of the audio playback speed. The audio analog-to-digital conversion chip U15 performs analog output processing on the signal.

[0013] Compared with the existing technology, the present invention provides a multifunctional UWB dual-band wireless microphone, which has the following beneficial effects:

[0014] This multifunctional UWB dual-band wireless pickup uses a high-bandwidth, low-latency UWB wireless solution to transmit audio, achieving Hi-Res Wireless Audio-grade lossless sound quality. Audio transmission is uncompressed, eliminating the need for compression and decompression, resulting in shorter latency and stable, high-definition audio transmission in less than 6mS. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the ADC circuit at the transmitter end of the utility model;

[0016] Figure 2 This is a schematic diagram of the transmitter monitoring earphone circuit of the utility model;

[0017] Figure 3 This is a schematic diagram of the MCU circuit at the transmitter end of the utility model;

[0018] Figure 4 This is a schematic diagram of the OLED display circuit at the transmitter end of the utility model;

[0019] Figure 5 This is a schematic diagram of the transmitter control encoder circuit of the utility model;

[0020] Figure 6 This is a schematic diagram of the UWB radio frequency transmission and amplification circuit of the transmitter end of the utility model;

[0021] Figure 7 This is a schematic diagram of the radio frequency receiving circuit of the receiving end of the utility model;

[0022] Figure 8 This is a schematic diagram of the MCU circuit at the receiving end of the utility model;

[0023] Figure 9 This is a schematic diagram of the receiving end OLED display circuit of the utility model;

[0024] Figure 10 This is a schematic diagram of the receiving end control encoder circuit of the utility model;

[0025] Figure 11 This is a schematic diagram of the ADC audio output circuit at the receiving end of the utility model;

[0026] Figure 12 This is a schematic diagram of the receiving-end monitoring earphone circuit of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1-12 As shown, the utility model provides a technical solution: a multifunctional UWB dual-band wireless pickup, including a transmitting end circuit and a receiving end circuit, the transmitting end circuit includes:

[0029] The transmitter ADC circuit encodes the data, the transmitter earphone circuit monitors the data, the transmitter MCU circuit processes the data, the transmitter encoding circuit encodes the data, the transmitter display circuit displays the data, and the transmitter RF amplifier circuit;

[0030] The receiving circuit includes:

[0031] The receiving end comprises a radio frequency circuit for receiving data, an MCU circuit for processing data, an encoding and decoding circuit for decoding data, a display circuit for displaying data, an output circuit for audio output, and a monitoring headphone circuit for receiving end.

[0032] The transmitter's ADC circuit includes an audio analog-to-digital conversion chip U7, and the transmitter's MCU circuit includes a transmitter MCU chip U5. Audio analog-to-digital conversion chip U7 collects the audio signals produced by musical instruments, converts them into digital signals in IIS format, and transmits them to transmitter MCU chip U5. The transmitter's headphone circuit includes an audio processing chip U8. Transmitter MCU chip U5 encapsulates the received digital audio signals at the rate required by UWB chip U11 and transmits them to UWB chip U11 via the SPI interface. U11 then transmits the signals using UWB wireless signals.

[0033] The receiving end MCU circuit includes the receiving end MCU chip U5, and the UWB chip U11 transmits the signal to the receiving end MCU chip U5 on the receiving end through the SPI interface; the receiving end output circuit includes the audio analog-to-digital conversion chip U15, and the signal of the receiving end MCU chip U5 is sent to the audio analog-to-digital conversion chip U15 in the IIS format according to the audio playback speed requirements, and the audio analog-to-digital conversion chip U15 performs analog output processing on the signal.

[0034] As an application of this embodiment:

[0035] At the transmitting end, the audio signal enters the follower built by the op amp chip U6 from the connector, and after the impedance change of the signal, it is input into the audio analog-to-digital conversion chip U7. The model of the audio analog-to-digital conversion chip U7 is PCM1861. The audio analog-to-digital conversion chip U7 converts the analog audio signal into a digital audio signal in IIS format and sends it to the transmitting end MCU chip U5. The model of the transmitting end MCU chip U5 is AT32F403. The transmitting end MCU chip U5 packages the digital audio signal and transmits it to the UWB chip U11 using the SPI interface. The model of the UWB chip U11 is MK8000. The UWB chip U11 then sends the signal to the two PAs for amplification and then sends it through the antennas U9 and U10, completing the wireless signal transmission process.

[0036] The transmitter is controlled by the transmitter MCU chip U5. It can select either analog audio captured by the ADC chip or digital audio from the USB interface as the audio data source. While transmitting audio data to the UWB chip, the transmitter MCU chip U5 also transmits the audio data to the audio processing chip U8 via the IIS interface. The audio processing chip U8 is an MS7126. This converts the digital audio into an analog signal and outputs it through the 3.5mm headphone jack, enabling real-time audio monitoring. The transmitter MCU chip U5 controls the transmit power and frequency band of the UWB chip U11 via GPIO, and also controls the display information on the device via the IIC interface.

[0037] Wireless signal transmission is controlled by the UWB chip U11. The UWB chip U11 houses a UWB RF transceiver and the M0 core. The M0 communicates with the MCU via SPI and GPIO to synchronize data flows. The UWB chip U11 is equipped with two wireless PAs and antennas, amplifying and transmitting signals in the 3-4.5GHz and 6-9GHz frequency bands, respectively. The multi-antenna, multi-PA design allows users to freely adjust the device's wireless frequency band. Users can set the device's frequency band on the display.

[0038] At the receiving end, the wireless audio signal is received from the antenna and enters the UWB chip U11. UWB chip U11 transmits the received audio signal via the SPI interface to the receiving MCU chip U5, which is an AT32F403. This MCU then transmits the audio data via the IIS interface to the audio analog-to-digital converter chip U15, which is a PCM5102. This converts the digital audio signal into an analog signal, which is output through a 6.5mm jack, completing the wireless signal reception process. This analog signal is also transmitted to the HT97220 amplifier chip U20, which amplifies the signal and transmits it to the 3.5mm headphone port for use with headphones.

[0039] The receiving end is controlled by the receiving MCU chip U5. The receiving MCU chip U5 can select either wireless audio received by UWB or digital audio from the USB interface as the audio data source. The MCU controls the receiving frequency band of the UWB chip U11 through GPIO and also controls the LCD display information on the device through the IIC interface.

[0040] Wireless signal reception is controlled by the UWB chip U11. This chip houses the UWB RF transceiver and the M0 core. The M0 communicates with the MCU via SPI and GPIO to synchronize data flows. The U11 is equipped with two antennas, one for receiving signals in the 3-4.5GHz and the other for receiving signals in the 6-9GHz band. The user can select the frequency band to use on the LCD.

[0041] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A multifunctional UWB dual-band wireless pickup, characterized by: The device comprises a transmitting end circuit and a receiving end circuit, wherein the transmitting end circuit comprises: A transmitter ADC circuit for encoding data, a transmitter headphone circuit for monitoring data, a transmitter MCU circuit for processing data, a transmitter encoding circuit for encoding data, a transmitter display circuit for displaying data, and a transmitter RF amplifier circuit; The receiving end circuit includes: A receiving end RF circuit for receiving data, a receiving end MCU circuit for processing data, a receiving end decoding circuit for decoding data, a receiving end display circuit for displaying the receiving end, a receiving end output circuit for audio output, and a receiving end monitoring headphone circuit.

2. The multifunctional UWB dual-band wireless pickup according to claim 1, characterized in that: The transmitting end ADC circuit includes an audio analog-to-digital conversion chip U7, and the transmitting end MCU circuit includes a transmitting end MCU chip U5. The audio analog-to-digital conversion chip U7 collects the audio signal generated by the musical instrument and converts it into a digital signal in IIS format and transmits it to the transmitting end MCU chip U5.

3. The multifunctional UWB dual-band wireless pickup according to claim 2, characterized in that: The transmitting end earphone circuit includes an audio processing chip U8. The transmitting end MCU chip U5 packages the received digital audio signal according to the rate requirement of the UWB chip U11 and transmits it to the UWB chip U11 via the SPI interface. The U11 sends the signal using a UWB wireless signal.

4. The multifunctional UWB dual-band wireless pickup according to claim 3, characterized in that: The receiving end MCU circuit includes a receiving end MCU chip U5, and the UWB chip U11 transmits the signal to the receiving end MCU chip U5 on the receiving end through the SPI interface.

5. The multifunctional UWB dual-band wireless pickup according to claim 4, characterized in that: The receiving end output circuit includes an audio analog-to-digital conversion chip U15. The signal of the receiving end MCU chip U5 is sent to the audio analog-to-digital conversion chip U15 in the IIS format according to the audio playback speed requirements. The audio analog-to-digital conversion chip U15 performs analog output processing on the signal.

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