CN206542547U - Bluetooth DAB earphone - Google Patents

Abstract

The utility model relates to a bluetooth digital audio earphone, comprising: a bluetooth antenna for receiving bluetooth signals; a bluetooth control module connected with the bluetooth antenna and processing bluetooth signals; a first interface for receiving wired digital signals; a micro-processing control module , connected with the bluetooth control module and the first interface, and processing the received bluetooth signal or wired digital signal to output a digital audio signal; the audio codec module, connected with the micro-processing control module, receives the digital audio signal and converts it into an analog audio Signal output and/or receive analog audio signals from the microphone, convert the analog audio signals into digital audio signals and send them to the micro-processing control module; and a power supply module for powering the Bluetooth digital audio headset. The bluetooth digital audio earphone of the utility model is compatible with wired high-fidelity earphones and wireless bluetooth earphones, so that users can hear lossless music.

Description

Bluetooth digital audio headset

technical field

The utility model relates to the field of bluetooth earphones, in particular to a bluetooth digital audio earphone.

Background technique

Bluetooth headset is to apply Bluetooth technology to hands-free headsets. Through Bluetooth wireless connection with mobile terminals, etc., it is convenient for users to perform wireless communication, etc., so that users can avoid the entanglement of wires and talk easily in various ways. Since the advent of Bluetooth headsets, more and more people use Bluetooth headsets. Users can answer calls away from the radiation of mobile phones, which can meet the requirements of the new traffic regulations. shortcoming:

1. The current Bluetooth headset cannot be charged or powered by the mobile phone;

2. When the Bluetooth headset transmits music, the audio is compressed. After the music is lossy and compressed, the lossless music cannot be heard;

3. Ordinary earphones are wired, and it is impossible to be compatible with wired high-fidelity earphones and wireless Bluetooth earphones at the same time, and switch freely.

Utility model content

The technical problem to be solved by the utility model is to provide a bluetooth digital audio earphone which can be charged or powered by an intelligent terminal and compatible with both wired high-fidelity earphones and wireless bluetooth earphones.

The technical solution adopted by the utility model to solve its technical problem is: construct a kind of bluetooth digital audio earphone, comprising:

Bluetooth antenna for receiving Bluetooth signals;

The bluetooth control module is connected with the bluetooth antenna, and processes the bluetooth signal;

The first interface is used to receive a wired digital signal;

The micro-processing control module is connected with the Bluetooth control module and the first interface, and processes the received Bluetooth signal or wired digital signal to output a digital audio signal;

The audio codec module is connected with the micro-processing control module, receives the digital audio signal and converts it into an analog audio signal output, and can also receive an analog signal from a microphone, and convert the analog audio signal into a digital audio signal and send it to a microprocessor control module; and

A power module, used to supply power for the Bluetooth digital audio headset;

Wherein, the microprocessing control module includes:

a signal processing unit, configured to process the received Bluetooth signal or the wired digital signal, and output the digital audio signal; and

The signal selection unit is connected with the signal processing unit, and is used for receiving either the Bluetooth signal or the wired digital signal to the signal processing unit.

Preferably, the micro-processing control module further includes a UART communication control unit connecting the Bluetooth control module and the signal processing unit, and the Bluetooth control module communicates with the micro-processing control module through UART communication; and

The first PCM/I ² S digital audio interface connecting the signal processing unit and the Bluetooth control module, the Bluetooth signal is connected to the signal processing unit through the first PCM/I ² S digital audio interface .

Preferably, the micro-processing control module further includes a USB communication control unit connected to the first interface, and the USB communication control unit receives the wired digital signal transmitted by the first interface.

Preferably, the micro-processing control module further includes an I ² C communication control unit connecting the signal processing unit and the audio codec module, and the micro-processing control module communicates with the audio codec via I ² C module communication; and

A ^second I2S digital audio interface connecting the signal processing unit and the audio codec module, the digital audio signal is connected to the audio codec module through the ^second I2S digital audio interface output .

Preferably, the first interface is a USB interface, a Micro USB interface, a Type-C interface or a Lighting interface.

Preferably, the Bluetooth digital audio headset further includes a battery charging module connected to the first interface for charging the power supply module.

Preferably, the Bluetooth digital audio headset further includes a status indicator module connected to the micro-processing control module.

Preferably, the Bluetooth digital audio headset also includes a connection line connecting the Bluetooth digital audio headset and the smart terminal;

A monitoring unit that is connected to the signal selection unit and sends a monitoring signal according to the monitoring situation, and the signal selection unit selects and receives the Bluetooth signal or the wired digital signal to the signal processing unit according to the monitoring signal;

If the Bluetooth digital audio headset is connected to the smart terminal through the connection line, the Bluetooth digital audio headset receives the wired digital signal through the connection line;

If the Bluetooth digital audio headset is connected to the smart terminal through the Bluetooth control module, the Bluetooth digital audio headset receives the Bluetooth signal through the Bluetooth control module.

Preferably, one end of the connection line is a first connector matching the first interface, and the other end is a second connector connected to the smart terminal, and the second connector is a Micro USB connector, Type-C USB Connector or Lighting connector.

Preferably, the smart terminal includes one or more of a mobile phone, a tablet computer, a notebook computer, a smart watch, a smart TV, a set-top box, and an Internet TV terminal.

Implementing the Bluetooth digital audio earphone of the present utility model has the following beneficial effects: the Bluetooth digital audio earphone of the present utility model receives the Bluetooth signal through the Bluetooth antenna, and the Bluetooth control module processes the Bluetooth signal; the first interface receives the wired digital signal; the microprocessing control module Process the received bluetooth signal or wired digital signal to output a digital audio signal; the audio codec module receives the digital audio signal and converts it into an analog audio signal output, and can also receive an analog signal from a microphone and convert the analog audio signal Convert it into a digital signal and send it to the micro-processing control module, so that the Bluetooth digital audio headset of the utility model is compatible with the wired high-fidelity headset and the wireless Bluetooth digital audio headset at the same time, to meet the different needs of consumers, and can realize wireless connection with Bluetooth communication equipment It is used as a wireless bluetooth digital audio headset, and has a wired digital signal input interface. It is used as a wired high-fidelity headset, so that users can listen to lossless music, and can also be charged or powered by the smart terminal through the first interface.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the structural representation of the utility model Bluetooth digital audio earphone;

Fig. 2 is the schematic diagram of the connecting wire embodiment of the utility model bluetooth digital audio earphone;

Fig. 3 is the circuit diagram of the bluetooth control module of the utility model bluetooth digital audio earphone;

Fig. 4 is the structural representation of the first interface of the Bluetooth digital audio earphone of the present invention;

Fig. 5 is the circuit diagram of the power module of the utility model bluetooth digital audio earphone;

Fig. 6 is the circuit diagram of the microprocessing control module of the utility model bluetooth digital audio earphone;

Fig. 7 is the circuit diagram of the audio codec module of the Bluetooth digital audio earphone of the present invention;

Fig. 8 is a circuit diagram of the battery charging module of the Bluetooth digital audio headset of the present invention.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is described in detail with reference to the accompanying drawings.

Referring to Fig. 1, it is an embodiment of the utility model bluetooth digital audio headset, including bluetooth antenna 100, bluetooth control module 200, first interface 300, microprocessing control module 400, audio codec module 500 and power supply module 600. Wherein, the bluetooth antenna 100 is used to receive the bluetooth signal; the bluetooth control module 200 is connected with the bluetooth antenna 100, and processes the bluetooth signal; the first interface 300 is used to receive the wired digital signal; An interface 300 is connected and processes the received bluetooth signal or wired digital signal to output a digital audio signal; the audio codec module 500 is connected with the micro-processing control module 400 to receive a digital audio signal and convert it into an analog audio signal output, which can also be output from a microphone Receive the analog signal, convert the analog audio signal into a digital signal and send it to the micro-processing control module; the power supply module 600 is used to supply power for the Bluetooth digital audio headset.

The first interface 300 is compatible with a charging function and a communication function, and is preferably a USB interface or a Micro USB interface, a Lighting interface or a Type-C USB interface. The bluetooth digital audio headset can be connected to an external smart terminal or a charger via a wired connection through the first interface 300 . When a charger is inserted into the first interface 300, the power module 600 is charged through the charging circuit; when an external smart terminal is connected, the power module 600 can be charged through the smart terminal, and the output of the smart terminal can also be output without damage. The digital audio signal is transmitted to the micro-processing control module 400 through the first interface 300 for signal processing. When the first interface 300 is connected with an external audio signal source, the first interface 300 is used as a wired digital signal input interface to receive wired digital signals, and the signal will not be compressed during wired transmission, so the Bluetooth digital audio headset can be used as a wired high-fidelity headset To use, so that users can listen to lossless music.

The microprocessing control module 400 includes a signal processing unit 401 and a signal selection unit 402 . Wherein, the signal selection unit 402 is used to select one to receive the bluetooth signal or wired digital signal to the signal processing unit 401; the signal processing unit 401 is connected to the signal selection unit 402 for processing the received bluetooth signal or wired digital signal and outputting a digital audio signal . As a preferred solution of this embodiment, the micro-processing control module 400 also includes a monitoring unit 403, the monitoring unit 403 is used to send a monitoring signal according to the monitoring situation, the signal selection unit 402 is connected to the monitoring unit 403, and selects to receive Bluetooth signals or wired signals according to the monitoring signals. The digital signal is sent to the signal processing unit 401. When the monitoring unit 403 detects the wired digital signal transmitted by the first interface 300, the signal selection unit 402 selects to receive the wired digital signal to the signal processing unit 401, and the signal processing unit 401 processes the wired digital signal and outputs a digital audio signal; When the monitoring unit 403 detects the Bluetooth signal transmitted by the Bluetooth control module 200, the signal selection unit 402 selects to receive the Bluetooth signal to the signal processing unit 401, and the signal processing unit 401 processes the Bluetooth signal and outputs a digital audio signal. When the Bluetooth digital audio headset simultaneously receives a wireless signal (Bluetooth signal) and a wired signal (the wired digital signal transmitted by the first interface 300), the monitoring unit 403 detects the existence of the two signals, and the signal selection unit 402 selects one of the signals , and processed by the signal processing unit 401. For example, Bluetooth signals may be preferentially selected according to user-defined rules, or wired digital signals may be preferentially selected.

Signal selection mode: no matter whether smart terminals such as mobile phones prompt the user to choose to transmit audio signals through the Bluetooth channel or the digital audio channel, the micro-processing control module of the Bluetooth digital audio headset of the present invention will monitor whether there is a digital signal on the first interface, and if there is a digital signal If the transmission is over, and the micro-processing control module can convert the current digital signal into a digital audio signal, then start the second working mode below; otherwise, keep the current Bluetooth communication mode or standby state.

It can be understood that some mobile phones or other intelligent terminals will transmit audio signals through the Bluetooth channel and the digital audio channel at the same time. experience.

In this embodiment, the microprocessor control module 400 also includes a UART communication control unit 405 and a first PCM/I ² S digital audio interface 404 . Wherein, the UART communication control unit 405 is connected to the Bluetooth control module 200 and the signal processing unit 401 , the microprocessing control module 400 communicates with the Bluetooth control module 200 through UART communication, and sends control signals to control the Bluetooth control module 200 . The first PCM/I ² S digital audio interface 404 is connected to the signal processing unit 401 and the Bluetooth control module 200 , and the Bluetooth signal is connected to the signal processing unit 401 through the first PCM/I ² S digital audio interface 404 .

In this embodiment, the micro-processing control module 400 also includes a USB communication control unit 406 connected to the first interface 300. The USB communication control unit 406 receives the wired digital signal transmitted by the first interface 300, and transmits the digital signal through the first interface 300 in a USB communication mode. Connect the external intelligent terminal, and transmit the data on the external intelligent terminal to the micro-processing control module 400 of the Bluetooth digital audio headset.

Further, the microprocessing control module 400 also includes an I ² C communication control unit 408 and a second I ² S digital audio interface 407 . Wherein the I ² C communication control unit 408 is connected to the signal processing unit 401 and the audio codec module 500, and the microprocessing control module 400 communicates with the audio codec module 500 through the I ² C communication mode; the second road I ² S digital audio interface 407 is connected The signal processing unit 401 and the audio codec module 500 , the digital audio signal is transmitted to the audio codec module 500 through the second I ² S digital audio interface 407 .

The audio codec module 500 is connected to the microphone 901 and the speaker of the Bluetooth digital audio headset, and the analog audio signal output by the audio codec module 500 is played through the speaker. The speakers include a left speaker 902 and a right speaker 903 .

The microphone 901 converts the voice signal into an analog audio signal, and the audio codec module 500 converts the analog audio signal into a digital audio signal and transmits it to the microprocessing control module 400 through the ^second I2S digital audio interface 407, and the microprocessing control module 400 The digital audio signal is transmitted to the smart terminal through the Bluetooth control module 200 or the first interface 300 .

Since the bluetooth digital audio earphone of the present invention can transmit data with external devices through wired connection and bluetooth, the bluetooth digital audio earphone can work in the following two working modes.

Working mode one is: the microprocessing control module 400 communicates with the Bluetooth control module 200 through the UART communication mode, and controls the Bluetooth control module 200 to successfully connect with the external terminal through the Bluetooth method, and then the Bluetooth control module 200 receives the Bluetooth signal and converts it into a PCM/ The I ² S data format is sent to the first PCM/I ² S digital audio interface 404 of the microprocessing control module 400, and the microprocessing control module 400 processes the Bluetooth signal and outputs the digital audio signal to the second I ² S digital audio interface 407 , transmit to the audio codec module 500 through the second I ² S digital audio interface 407, and communicate with the audio codec module 500 through the I ² C communication mode, and control the audio codec module 500 to convert the digital audio signal into an analog audio signal , and play the analog audio signal through the speaker. The audio codec module 500 can also receive the analog audio signal from the microphone, convert the analog audio signal into a digital audio signal and send it to the micro-processing control module.

The second working mode of the Bluetooth digital audio headset is: the micro-processing control module 400 is connected to the smart terminal through the first interface 300, and receives the wired digital signal transmitted by the smart terminal through the USB communication mode, and the micro-processing control module 400 internally calculates the wired digital signal After processing, convert the digital audio signal into I ² S format, and forward the digital audio signal to the second I ² S digital audio interface 407, and transmit the digital audio signal to the audio through the second I ² S digital audio interface 407. The codec module 500 communicates with the audio codec module 500 through I ² C communication, controls the audio codec module 500 to convert the digital audio signal into an analog audio signal, and plays the analog audio signal through the speaker. The audio codec module 500 can also receive an analog signal from the microphone, convert the analog audio signal into a digital audio signal and send it to the micro-processing control module, and the micro-processing control module transmits it to the smart terminal through the first interface 300 .

The micro-processing control module 400 monitors the current working state through the internal port, and automatically switches between working mode 1 and working mode 2.

The power supply module 600 is the power supply module of the bluetooth digital audio headset itself, and the battery of the power supply module 600 is a rechargeable battery, such as a lithium battery or a nickel-cadmium battery.

Optionally, the Bluetooth digital audio headset further includes a battery charging module 700 connected to the first interface 300 for charging the power supply module 600 . The battery charging module 700 monitors whether the first interface 300 is powered on, and starts the battery charging function of the power module 600 when the first interface 300 is powered on. For example, the battery charging module 700 monitors whether a 5V power supply is connected to the first interface 300, and starts the battery charging function when a 5V power supply is connected. The battery charging module 700 can start the battery charging function no matter whether the first interface 300 is connected to the smart terminal or an external charger, that is, the battery can be charged by the smart terminal or by the external charger.

Preferably, the bluetooth digital audio headset of the present invention also includes a status indicator module 800, which is connected to the micro-processing control module 400, and is used for low battery warning, charging reminder, signal switching reminder and the like. The micro-processing control module 400 monitors the current working status and controls the status indicator module 800 to indicate the current status, and the expression form can be distinguished by the color of the LED light.

The utility model bluetooth digital audio earphone also comprises the connecting line 10 that connects bluetooth digital audio earphone and intelligent terminal, and the working process of bluetooth digital audio earphone and the connecting line 10 that matches with it is:

If the bluetooth digital audio earphone is connected to the intelligent terminal through the connecting line 10, then the bluetooth digital audio earphone receives the wired digital signal through the connecting line 10;

If the Bluetooth digital audio headset is connected to the smart terminal through the Bluetooth control module 200 , the Bluetooth digital audio headset receives the Bluetooth signal through the Bluetooth control module 200 .

One end of the connection line 10 is a first connector matching the first interface 300 , and the other end is a second connector connected to the smart terminal for matching the interface of the smart terminal. When the first interface 300 is a USB interface, a Micro USB interface or a Type-C USB interface, the first connector is correspondingly a USB connector, a Micro USB connector or a Type-C USB connector. As shown in Figure 2, the second connector of the connecting line 10 can be a Micro USB connector, a Type-C USB connector or a Lighting connector, respectively matching a smart terminal such as a Micro USB interface or a Type-C USB interface of an Android phone, and a Lighting connector of an Apple phone. interface. In other embodiments, the second connector may also be an HDMI connector. Smart terminals include one or more of mobile phones, tablet computers, notebook computers, smart watches, smart TVs, set-top boxes, or Internet TV terminals. Taking the smart terminal as a mobile phone as an example, when the first interface 300 is connected to the corresponding interface of the mobile phone through the connecting line 10, the Bluetooth digital audio headset will automatically identify the current mobile phone type, transmit data in the USB communication mode, and transfer the data on the mobile phone to In the microprocessing control module 400 of the bluetooth digital audio headset.

Referring to Fig. 3-Fig. 8, it is a preferred embodiment of the present utility model.

In this preferred embodiment, the Bluetooth control module is a Bluetooth control circuit as shown in Figure 3; the first interface is a Micro USB interface as shown in Figure 4; the power supply module is a power supply circuit as shown in Figure 5; The module is a micro-processing control circuit as shown in Figure 6; the audio codec module is an audio codec circuit as shown in Figure 7; the battery charging module is a charging circuit as shown in Figure 8.

The Bluetooth digital audio headset can be wired to an external smart terminal or charger through, for example, a Micro USB interface. When the charger is inserted into the Micro USB interface, the battery of the power module is charged through the charging circuit; when connected to an external smart terminal, The battery of the power module can be charged through the smart terminal; when the Micro USB interface is connected to an external audio signal source, the Micro USB interface can be used as a wired digital signal input interface to receive wired digital signals. At this time, the Bluetooth digital audio headset can be used as a wired headset.

The micro-processing control circuit of the Bluetooth digital audio headset is connected with the Bluetooth control circuit and the audio codec circuit, and the Bluetooth signal is received by the Bluetooth control circuit and sent to the first PCM/I ² S digital audio interface of the micro-processing control circuit, and the micro-processing control circuit Process the Bluetooth signal and output the digital audio signal to the second I ² S digital audio interface, transmit it to the audio codec circuit through the second I ² S digital audio interface, and control the audio codec circuit to convert the digital audio signal into analog audio Signal, the analog audio signal output by the audio codec circuit is played out through the speaker. The microphone 901 converts the voice signal into an analog audio signal, and the audio codec circuit converts the analog audio signal into a digital audio signal and transmits it to the micro-processing control circuit through the ^second I2S digital audio interface, and the micro-processing control circuit passes the bluetooth control circuit The digital audio signal is transmitted to the smart terminal wirelessly.

Alternatively, the micro-processing control circuit is connected to the smart terminal through the Micro USB interface, receives the wired digital signal transmitted by the smart terminal, and the micro-processing control circuit processes the wired digital signal and outputs a digital audio signal, and forwards the digital audio signal to the second channel I ² S digital audio interface, through the second I ² S digital audio interface, the digital audio signal is transmitted to the audio codec circuit, and the audio codec circuit is controlled to convert the digital audio signal into an analog audio signal, and the audio codec module outputs The analog audio signal is played out through the speakers.

The microphone 901 can convert the voice signal into an analog audio signal, and the audio codec circuit converts the analog audio signal into a digital audio signal and transmits it to the micro-processing control circuit through the ^second I2S digital audio interface, and the micro-processing control circuit passes the first The interface transmits the digital audio signal to the smart terminal in a wired manner.

The power supply circuit is the power supply circuit of the Bluetooth digital audio headset itself.

The charging circuit is connected to the first interface, such as the Micro USB interface, for charging the battery of the power module. The charging circuit monitors whether the Micro USB interface has power access, and starts the battery charging function of the power module when the Micro USB interface has power input. For example, the charging circuit monitors whether there is a 5V power supply connected to the Micro USB interface, and when the 5V voltage is connected, the battery charging function is activated. Regardless of whether the Micro USB interface is connected to a smart terminal or an external charger, the charging circuit can start the charging function of the battery, that is, the battery can be charged through a smart terminal or an external charger. A status indicator light is connected to the charging circuit, and when charging, the micro-processing control circuit controls the status indicator light to light up to indicate the current status.

The microphone converts the speech signal into an analog audio signal, and the audio codec circuit converts the analog audio signal into a digital audio signal and transmits it to the micro-processing control circuit, and the micro-processing control circuit converts the digital audio signal through the Bluetooth control circuit or the first interface, such as the Micro USB interface. The audio signal is transmitted to the smart terminal.

To sum up, the Bluetooth digital audio headset of the utility model is compatible with wired high-fidelity headsets and wireless Bluetooth digital audio headsets at the same time, meeting the different needs of consumers. It can be wirelessly connected with Bluetooth communication equipment and used as a wireless Bluetooth digital audio headset. , and has a wired digital signal input interface, used as a wired high-fidelity headset, so that users can listen to lossless music, and can also be charged or powered by a smart terminal.

It can be understood that the above examples only express the preferred implementation of the present utility model, and its description is relatively specific and detailed, but it should not be interpreted as limiting the scope of the utility model patent; For those skilled in the art, under the premise of not departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and some deformations and improvements can also be made, all of which belong to the protection scope of the utility model; The equivalent transformations and modifications made in the scope of the claims of the utility model shall all fall within the scope of the claims of the utility model.

Claims (9)

1. A bluetooth digital audio headset, characterized in that, comprising: Bluetooth antenna for receiving Bluetooth signals; The bluetooth control module is connected with the bluetooth antenna, and processes the bluetooth signal; The first interface is used to receive a wired digital signal; The micro-processing control module is connected with the Bluetooth control module and the first interface, and processes the received Bluetooth signal or wired digital signal to output a digital audio signal; The audio codec module is connected with the micro-processing control module, receives the digital audio signal and converts it into an analog audio signal for output, and/or receives the analog audio signal, and converts the analog audio signal into a digital audio signal for transmission to said microprocessor control module; and A power module, used to supply power for the Bluetooth digital audio headset; Wherein, the microprocessing control module includes: a signal processing unit, configured to process the received Bluetooth signal or the wired digital signal, and output the digital audio signal; and A signal selection unit, connected to the signal processing unit, for selecting one to receive the Bluetooth signal or the wired digital signal to the signal processing unit; The micro-processing control module also includes a UART communication control unit connecting the Bluetooth control module and the signal processing unit, and the Bluetooth control module communicates with the micro-processing control module through UART communication; and The first PCM/I ² S digital audio interface connecting the signal processing unit and the Bluetooth control module, the Bluetooth signal is connected to the signal processing unit through the first PCM/I ² S digital audio interface . 2. The bluetooth digital audio earphone according to claim 1, wherein the micro-processing control module also includes a USB communication control unit connected to the first interface, and the USB communication control unit receives the first interface The wired digital signal transmitted. 3. The bluetooth digital audio headset according to any one of claims ^1-2 , wherein the micro-processing control module also includes an I2C communication control module connecting the signal processing unit and the audio codec module unit, the micro-processing control module communicates with the audio codec module through I ² C communication; and The signal processing unit is connected to the second I ² S digital audio interface of the audio codec module, and the digital audio signal is connected to the audio codec module through the second I ² S digital audio interface. 4. The Bluetooth digital audio headset according to claim 1, wherein the first interface is a USB interface, a Micro USB interface, a Type-C interface or a Lighting interface. 5. The bluetooth digital audio earphone according to claim 1, characterized in that, the bluetooth digital audio earphone further comprises a battery charging module connected to the first interface for charging the power supply module. 6. The bluetooth digital audio earphone according to claim 1, characterized in that, the bluetooth digital audio earphone also comprises a status indicator module connected with the micro-processing control module. 7. The bluetooth digital audio earphone according to claim 1, wherein the bluetooth digital audio earphone also includes a connecting wire connecting the bluetooth digital audio earphone and an intelligent terminal; A monitoring unit that is connected to the signal selection unit and sends a monitoring signal according to the monitoring situation, and the signal selection unit selects and receives the Bluetooth signal or the wired digital signal to the signal processing unit according to the monitoring signal; If the Bluetooth digital audio headset is connected to the smart terminal through the connection line, the Bluetooth digital audio headset receives the wired digital signal through the connection line; If the Bluetooth digital audio headset is connected to the smart terminal through the Bluetooth control module, the Bluetooth digital audio headset receives the Bluetooth signal through the Bluetooth control module. 8. The bluetooth digital audio earphone according to claim 7, wherein one end of the connection line is a first connector matching the first interface, and the other end is a second connector connected to the smart terminal , the second connector is a Micro USB connector, a Type-C USB connector or a Lighting connector. 9. The Bluetooth digital audio headset according to claim 7, wherein the smart terminal includes one or more of a mobile phone, a tablet computer, a notebook computer, a smart watch, a smart TV, a set-top box, and an Internet TV terminal.