A two-way wireless audio transmission device

Abstract

The present invention belongs to the field of communication, and discloses a two-way wireless audio transmission device, comprising a main unit and a sub-unit; the main unit comprises a first wireless component, a first audio output component, a first amplifying input component and a first digital signal processing component; the sub-unit comprises a second wireless component, a second audio output component, a microphone amplifying input component, a second amplifying input component, a first analog-to-digital conversion component and a second digital signal processing component; the second amplifying input component receives a third original analog audio signal, the microphone amplifying input component receives a second original analog audio signal, the first amplifying input component inputs the first original analog audio signal, and the second audio output component outputs a second target audio signal, thereby realizing the input of original audio signals of three channels, and while inputting background music, the voice information of two hosts (users) can be accessed, thereby increasing the number of original audio signal input channels, and realizing network live broadcasting by multiple hosts.

Description

Technical Field

[0001] The invention belongs to the field of communications, and in particular relates to a two-way wireless audio transmission device. Background Art

[0002] A conventional two-way wireless audio transmission device includes a host and a slave connected to the host; a first wireless receiving component, a first amplifying component, a first earphone amplifier component, a first input-output component and a first wireless transmitting component.

[0003] The first wireless receiving component generates a first audio signal according to the first audio communication signal received from the wireless link; the first amplifying component generates a first audio amplified signal according to the first audio signal; the first ear amplifier component generates a first target audio signal according to the first audio amplified signal; the first input and output component outputs the first target audio signal and receives the second original audio signal; the first wireless transmitting component generates a second audio communication signal according to the second original audio signal, and sends the second audio communication signal through the wireless link. Among them, the auxiliary machine includes a second wireless receiving component, a second amplifying component, a second ear amplifier component, a first output component, a microphone amplifying input component and a second wireless transmitting component. The second wireless receiving component is configured to generate a second audio signal according to the second audio communication signal received from the wireless link; the second amplifying component generates a second audio amplified signal according to the second audio signal; the second ear amplifier component generates a second target audio signal according to the second audio amplified signal; the first output component outputs the second target audio signal; the microphone amplifying input component generates a first audio analog signal according to the first original audio signal; the second wireless transmitting component generates a first audio communication signal according to the first audio analog signal, and sends the first audio communication signal through the wireless link. Since the traditional two-way wireless audio transmission device only receives the second original audio signal and the first original audio signal through the first input-output component and the microphone amplifier input component, during live broadcast on the Internet, in addition to the background music, only the audio information of one host can be input, which cannot meet the needs of live broadcast on the Internet by multiple hosts. Summary of the invention

[0004] The present invention provides a bidirectional wireless audio transmission device, aiming to solve the problems of signal crosstalk and high hardware cost in traditional bidirectional wireless audio transmission devices.

[0005] The present invention is implemented as follows: a two-way wireless audio transmission device, the two-way wireless audio transmission device includes a host and a secondary device connected to the host;

[0006] The host comprises:

[0007] a first wireless component configured to generate a first digital audio signal based on a first audio communication signal received from a wireless link and to generate a second audio communication signal based on a second digital audio signal;

[0008] a first audio output component connected to the first wireless component and configured to output a first target audio signal according to the first digital audio signal;

[0009] a first amplification input component configured to generate a first analog amplified audio signal based on a received first original analog audio signal;

[0010] a first digital signal processing component connected to the first amplifying input component and the first wireless component and configured to generate the second digital audio signal based on the first analog amplified audio signal;

[0011] The auxiliary machine comprises:

[0012] a second wireless component configured to generate a third digital audio signal based on the second audio communication signal received from the wireless link and to generate the first audio communication signal based on a fifth digital audio signal;

[0013] a second audio output component connected to the second wireless component and configured to output a second target audio signal according to the third digital audio signal;

[0014] A microphone amplifier input component that generates a second analog amplified audio signal based on the received second original analog audio signal;

[0015] a second amplification input component for generating a third analog amplified audio signal based on a received third original analog audio signal;

[0016] a first analog-to-digital conversion component connected to the second amplification input component and configured to generate a fourth digital audio signal according to the third analog amplified audio signal;

[0017] A second digital signal processing component connected to the second wireless component, the microphone amplifier input component and the first analog-to-digital conversion component, and configured to generate a fifth digital audio signal according to the second analog amplified audio signal and / or the fourth digital audio signal.

[0018] In one embodiment, the first audio output component includes:

[0019] A first digital-to-analog conversion component connected to the first wireless component and configured to generate a first analog audio signal according to the first digital audio signal;

[0020] A first headphone amplifier component is connected to the first digital-to-analog conversion component and configured to output a first target audio signal according to the first analog audio signal.

[0021] In one embodiment, the first digital-to-analog conversion component includes a stereo digital-to-analog converter, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, and a third resistor;

[0022] The first end of the first resistor is the first digital audio signal input end of the first digital-to-analog conversion component, the second end of the first resistor is connected to the serial audio data input end of the stereo digital-to-analog converter, the right channel analog output end of the stereo digital-to-analog converter is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the first end of the second resistor, the left channel analog output end of the stereo digital-to-analog converter is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is connected to the first end of the third resistor, the second end of the second resistor and the second end of the third resistor jointly constitute the first analog audio signal output end of the stereo digital-to-analog converter, the analog power supply end of the stereo digital-to-analog converter and the first end of the third capacitor are commonly connected to the first power supply, the static voltage end of the stereo digital-to-analog converter is connected to the first end of the first capacitor, and the ground end of the stereo digital-to-analog converter, the second end of the first capacitor and the second end of the third capacitor are commonly connected to the power ground.

[0023] In one embodiment, the first earphone amplifier component includes a stereo earphone amplifier, a first connector, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;

[0024] The charging pump power supply terminal of the stereo headphone amplifier, the positive power supply terminal of the amplifier of the stereo headphone amplifier, the first end of the ninth capacitor, the first end of the eighth capacitor, the first end of the seventh capacitor and the first end of the fifth resistor are connected to the second power supply, the positive terminal of the capacitor of the stereo headphone amplifier is connected to the first end of the tenth capacitor, the second end of the tenth capacitor is connected to the negative terminal of the capacitor of the stereo headphone amplifier, the charging pump output terminal of the stereo headphone amplifier is connected to the negative power supply terminal of the amplifier of the stereo headphone amplifier, the first end of the eleventh capacitor and the first end of the thirteenth capacitor, the reverse right channel audio input terminal of the stereo headphone amplifier is connected to the first end of the seventh resistor, the first end of the ninth resistor and the first end of the fifteenth capacitor, the right channel output terminal of the stereo headphone amplifier is connected to the second end of the ninth resistor, the second end of the fifteenth capacitor and the first end of the first connector, and the left channel output terminal of the stereo headphone amplifier is connected to the first end of the eighth resistor, the first end of the fourteenth capacitor and the second end of the first connector. The reverse left channel audio input terminal of the stereo headphone amplifier is connected to the second end of the eighth resistor, the second end of the fourteenth capacitor and the first end of the fourth resistor, the low level effective shutdown terminal of the stereo headphone amplifier is connected to the second end of the fifth resistor and the first end of the sixth resistor, the second end of the fourth resistor is connected to the first end of the sixth capacitor, the second end of the seventh resistor is connected to the first end of the twelfth capacitor, the second end of the sixth capacitor and the second end of the twelfth capacitor jointly constitute the first analog audio signal input terminal of the first headphone amplifier component, the first end of the first connector and the second end of the first connector jointly constitute the first target audio signal output terminal of the first headphone amplifier component, the signal ground terminal of the stereo headphone amplifier, the positive right channel audio input terminal of the stereo headphone amplifier, the positive left channel audio input terminal of the stereo headphone amplifier, the second end of the sixth resistor, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the ninth capacitor, the second end of the eleventh capacitor and the second end of the thirteenth capacitor are commonly connected to the power ground.

[0025] In one embodiment, the first digital signal processing component includes a first digital signal processor, a sixteenth capacitor and a seventeenth capacitor;

[0026] The first I2S signal data terminal of the first digital signal processor is the second digital audio signal output terminal of the first digital signal processing component, the left channel audio input terminal of the first digital signal processor is connected to the first end of the sixteenth capacitor, the right channel audio input terminal of the first digital signal processor is connected to the first end of the seventeenth capacitor, and the second end of the sixteenth capacitor and the second end of the seventeenth capacitor together constitute the first analog amplified audio signal input terminal of the first digital signal processing component.

[0027] In one embodiment, the second audio output component includes:

[0028] a second digital-to-analog conversion component connected to the second wireless component and configured to generate a second analog audio signal according to the third digital audio signal;

[0029] A second headphone amplifier component connected to the second digital-to-analog conversion component and configured to output a second target audio signal according to the second analog audio signal.

[0030] In one embodiment, the second digital signal processing component includes a second digital signal processor, an eighteenth capacitor and a nineteenth capacitor;

[0031] The first I2S signal data terminal of the second digital signal processor is the fifth digital audio signal output terminal of the second digital signal processing component, the first end of the eighteenth capacitor and the first end of the nineteenth capacitor C together constitute the second analog amplified audio signal input terminal of the second digital signal processing component, the second end of the eighteenth capacitor is connected to the left channel audio input terminal of the second digital signal processor, the second end of the nineteenth capacitor is connected to the right channel audio input terminal of the second digital signal processor, and the second I2S signal data terminal of the second digital signal processor is the fourth digital audio signal input terminal of the second digital signal processing component.

[0032] In one embodiment, the microphone amplifier input component includes an operational amplifier, a 20th capacitor, a 21st capacitor, a 22nd capacitor, a 23rd capacitor, a 24th capacitor, a 25th capacitor, a 26th capacitor, a 27th capacitor, a 28th capacitor, a 29th capacitor, a 10th resistor, an 11th resistor, a 12th resistor, a 13th resistor, a 14th resistor, and a 15th resistor;

[0033] The non-inverting input terminal of the operational amplifier is connected to the first end of the eleventh resistor and the first end of the twenty-fourth capacitor, the second end of the eleventh resistor is connected to the second end of the twenty-fourth capacitor, the first end of the twenty-fifth capacitor, the first end of the twenty-sixth capacitor, the first end of the thirteenth resistor and the first end of the fourteenth resistor, the inverting input terminal of the operational amplifier is connected to the first end of the tenth resistor, the first end of the twenty-third capacitor and the first end of the twelfth resistor, the second end of the twelfth resistor is connected to the first end of the twenty-seventh capacitor, the second end of the twenty-seventh capacitor and the first end of the sixteenth resistor together constitute the second original analog audio signal input terminal of the microphone amplifier input component, the second end of the sixteenth resistor is connected to the first end of the fifteenth resistor and the first end of the twenty-eighth capacitor, the power supply terminal of the operational amplifier, the first end of the twenty-first capacitor, the first end of the twenty-second capacitor, the second end of the fourteenth resistor, the second end of the fifteenth resistor and the first end of the twenty-ninth capacitor are commonly connected to a third power supply, the output terminal of the operational amplifier is connected to the first end of the twentieth capacitor, the second end of the tenth resistor and the second end of the twenty-third capacitor, and the second end of the twentieth capacitor is the second analog amplified audio signal output terminal of the microphone amplifier input component.

[0034] In one embodiment, the first wireless component and the second wireless component are both 5.8G wireless communication components.

[0035] In the embodiment of the present invention, in the host, the first wireless component generates a first digital audio signal according to a first audio communication signal received from a wireless link, and generates a second audio communication signal according to a second digital audio signal; the first audio output component outputs a first target audio signal according to the first digital audio signal; the first amplification input component generates a first analog amplified audio signal according to the received first original analog audio signal; the first digital signal processing component generates the second digital audio signal according to the first analog amplified audio signal; in the slave, the second wireless component generates a third digital audio signal according to the second audio communication signal received from the wireless link, and generates the first audio communication signal according to the fifth digital audio signal; the second audio output component generates a first target audio signal according to the third The digital audio signal outputs a second target audio signal; the microphone amplifier input component generates a second analog amplified audio signal based on the received second original analog audio signal; the second amplifier input component generates a third analog amplified audio signal based on the received third original analog audio signal; the first analog-to-digital conversion component generates a fourth digital audio signal based on the third analog amplified audio signal; the second digital signal processing component generates a fifth digital audio signal based on the second analog amplified audio signal and / or the fourth digital audio signal; thereby realizing the input of three channels of original audio signals, and while inputting background music, the voice information of two hosts (users) can be connected, thereby increasing the number of original audio signal input channels and realizing live broadcasts on the Internet by multiple hosts. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical invention in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A component structure diagram of a two-way wireless audio transmission device provided by an embodiment of the present invention;

[0038] Figure 2 A component structure diagram of a first audio output component of a two-way wireless audio transmission device provided in an embodiment of the present invention;

[0039] Figure 3 A component structure diagram of a second audio output component of a two-way wireless audio transmission device provided in an embodiment of the present invention;

[0040] Figure 4 An exemplary circuit structure diagram of a host of a two-way wireless audio transmission device provided by an embodiment of the present invention;

[0041] Figure 5This is an example circuit structure diagram of a secondary device of a two-way wireless audio transmission device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Figure 1 The component structure of the bidirectional wireless audio transmission device provided by the embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:

[0044] The above-mentioned two-way wireless audio transmission device comprises a host and a secondary device connected to the host.

[0045] The host includes a first wireless component 01 , a first audio output component 02 , a first amplifying input component 03 and a first digital signal processing component 04 .

[0046] The first wireless component 01 is configured to generate a first digital audio signal based on a first audio communication signal received from a wireless link, and to generate a second audio communication signal based on a second digital audio signal; the first audio output component 02 is connected to the first wireless component 01, and is configured to output a first target audio signal based on the first digital audio signal; the first amplification input component 03 is configured to generate a first analog amplified audio signal based on the received first original analog audio signal; the first digital signal processing component 04 is connected to the first amplification input component 03 and the first wireless component 01, and is configured to generate a second digital audio signal based on the first analog amplified audio signal.

[0047] The slave device includes a second wireless component 05 , a second audio output component 06 , a microphone amplifier input component 07 , a second amplifier input component 08 , a first analog-to-digital conversion component 09 and a second digital signal processing component 10 .

[0048] The second wireless component 05 is configured to generate a third digital audio signal based on the second audio communication signal received from the wireless link, and to generate a first audio communication signal based on the fifth digital audio signal; the second audio output component 06 is connected to the second wireless component 05, and is configured to output a second target audio signal based on the third digital audio signal; the microphone amplifier input component 07 generates a second analog amplified audio signal based on the received second original analog audio signal; the second amplifier input component 08 generates a third analog amplified audio signal based on the received third original analog audio signal; the first analog-to-digital conversion component 09 is connected to the second amplifier input component 08, and is configured to generate a fourth digital audio signal based on the third analog amplified audio signal; the second digital signal processing component 10 is connected to the second wireless component 05, the microphone amplifier input component 07 and the first analog-to-digital conversion component 09, and is configured to generate a fifth digital audio signal based on the second analog amplified audio signal and / or the fourth digital audio signal.

[0049] Since the second amplifying input component 08 is connected to the first terminal to receive the third original analog audio signal carrying background audio information, the microphone amplifying input component 07 receives the second original analog audio signal carrying the first user's voice information, the first amplifying input component 0303 inputs the first original analog audio signal carrying the background audio information, the first user's voice information and the second user's voice information, and the second audio output component 06 outputs the second target audio signal carrying the background audio information, the first user's voice information and the second user's voice information to the live broadcast platform, thereby realizing the input of three channels of original audio signals. While inputting background music, the voice information of two hosts (users) can be connected, thereby increasing the number of original audio signal input channels and realizing multiple hosts to conduct online live broadcasts.

[0050] Specifically, the first wireless component 01 and the second wireless component 05 are both 5.8G wireless communication components.

[0051] like Figure 2 As shown, the first audio output component 02 includes a first digital-to-analog conversion component 021 and a first headphone amplifier component 022 .

[0052] The first digital-to-analog conversion component 021 is connected to the first wireless component 01 and is configured to generate a first analog audio signal according to the first digital audio signal; the first earphone amplifier component 022 is connected to the first digital-to-analog conversion component 021 and is configured to output a first target audio signal according to the first analog audio signal.

[0053] The first digital-to-analog conversion component 021 and the first headphone amplifier component 022 realize digital-to-analog conversion of the first digital audio signal and amplification of the first analog audio signal, thereby reducing the distortion of the audio playback and improving the power of the audio playback.

[0054] like Figure 3 As shown, the second audio output component 06 includes a second digital-to-analog conversion component 061 and a second headphone amplifier component 062 .

[0055] The second digital-to-analog conversion component 061 is connected to the second wireless component 05 and is configured to generate a second analog audio signal according to the third digital audio signal; the second earphone amplifier component 062 is connected to the second digital-to-analog conversion component 061 and is configured to output a second target audio signal according to the second analog audio signal.

[0056] The digital-to-analog conversion of the third digital audio signal and the amplification of the second analog audio signal are achieved through the second digital-to-analog conversion component 061 and the second headphone amplifier component 062, thereby reducing the distortion of the audio playback and improving the power of the audio playback.

[0057] As an example but not limitation, the first digital-to-analog conversion component 021 and the second digital-to-analog conversion component 061 can adopt the same circuit structure or different circuit structures; the first headphone amplifier component 022 and the second headphone amplifier component 062 can adopt the same circuit structure or different circuit structures.

[0058] Figure 4 The figure shows an example circuit structure of a host of a two-way wireless audio transmission device provided by an embodiment of the present invention. Figure 5 An example circuit structure of a secondary device of a two-way wireless audio transmission device provided by an embodiment of the present invention is shown. For ease of description, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0059] The first digital-to-analog conversion component 021 includes a stereo digital-to-analog converter U1 , a first capacitor C1 , a second capacitor C2 , a third capacitor C3 , a fourth capacitor C4 , a fifth capacitor C5 , a first resistor R1 , a second resistor R2 , and a third resistor R3 .

[0060] The first end of the first resistor R1 is the first digital audio signal input end of the first digital-to-analog conversion component 021, the second end of the first resistor R1 is connected to the serial audio data input end SDA of the stereo digital-to-analog converter U1, the right channel analog output end AOUTR of the stereo digital-to-analog converter U1 is connected to the first end of the second capacitor C2, the second end of the second capacitor C2 is connected to the first end of the second resistor R2, the left channel analog output end AOUTL of the stereo digital-to-analog converter U1 is connected to the first end of the fourth capacitor C4, the second end of the fourth capacitor C4 is connected to the first end of the third resistor R3, the second end of the second resistor R2 and the second end of the third resistor R3 jointly constitute the first analog audio signal output end of the stereo digital-to-analog converter U1, the analog power supply end VA of the stereo digital-to-analog converter U1 and the first end of the third capacitor C3 are commonly connected to the first power supply VAA, the static voltage end VQ of the stereo digital-to-analog converter U1 is connected to the first end of the first capacitor C1, the ground end GND of the stereo digital-to-analog converter U1, the second end of the first capacitor C1 and the second end of the third capacitor C3 are commonly connected to the power ground.

[0061] The first ear amplifier component 022 includes a stereo headphone amplifier U2, a first connector J1, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9.

[0062] The charging pump power supply terminal PVDD of the stereo headphone amplifier U2, the amplifier positive power supply terminal SVDD of the stereo headphone amplifier U2, the first end of the ninth capacitor C9, the first end of the eighth capacitor C8, the first end of the seventh capacitor C7 and the first end of the fifth resistor R5 are connected to the second power supply VBB, the capacitor positive terminal C1P of the stereo headphone amplifier U2 is connected to the first end of the tenth capacitor C10, the second end of the tenth capacitor C10 is connected to the capacitor negative terminal C1N of the stereo headphone amplifier U2, the charging pump output terminal PVSS of the stereo headphone amplifier U2 is connected to the amplifier negative power supply terminal SVDD of the stereo headphone amplifier U2 The first end of the first connector J1 is connected to the left channel output terminal OUTL of the stereo headphone amplifier U2, and the first end of the eighth resistor R8, the first end of the fourteenth capacitor C14, and the first end of the first connector J2. The second end of the connector J1 is connected, the reverse left channel audio input terminal INL- of the stereo headphone amplifier U2 is connected to the second end of the eighth resistor R8, the second end of the fourteenth capacitor C14 and the first end of the fourth resistor R4, the low level effective shutdown terminal SHDN of the stereo headphone amplifier U2 is connected to the second end of the fifth resistor R5 and the first end of the sixth resistor R6, the second end of the fourth resistor R4 is connected to the first end of the sixth capacitor C6, the second end of the seventh resistor R7 is connected to the first end of the twelfth capacitor C12, the second end of the sixth capacitor C6 and the second end of the twelfth capacitor C12 together constitute the first ear amplifier component 022 The first analog audio signal input terminal, the first end of the first connector J1 and the second end of the first connector J1 together constitute the first target audio signal output terminal of the first ear amplifier component 022, the signal ground terminal SGND of the stereo headphone amplifier U2, the positive right channel audio input terminal INR+ of the stereo headphone amplifier U2, the positive left channel audio input terminal INL+ of the stereo headphone amplifier U2, the second end of the sixth resistor R6, the second end of the seventh capacitor C7, the second end of the eighth capacitor C8, the second end of the ninth capacitor C9, the second end of the eleventh capacitor C11 and the second end of the thirteenth capacitor C13 are connected to the power ground.

[0063] The first digital signal processing component 04 includes a first digital signal processor U3, a sixteenth capacitor C16 and a seventeenth capacitor C17.

[0064] The first I2S signal data terminal IIS_D2 of the first digital signal processor U3 is the second digital audio signal output terminal of the first digital signal processing component 04, the left channel audio input terminal LIN of the first digital signal processor U3 is connected to the first end of the sixteenth capacitor C16, the right channel audio input terminal RIN of the first digital signal processor U3 is connected to the first end of the seventeenth capacitor C17, the second end of the sixteenth capacitor C16 and the second end of the seventeenth capacitor C17 together constitute the first analog amplified audio signal input terminal of the first digital signal processing component 04.

[0065] The second digital signal processing component 10 includes a second digital signal processor U4, an eighteenth capacitor C18 and a nineteenth capacitor C19.

[0066] The first I2S signal data terminal IIS_D2 of the second digital signal processor U4 is the fifth digital audio signal output terminal of the second digital signal processing component 10, the first end of the eighteenth capacitor C18 and the first end of the nineteenth capacitor C19 together constitute the second analog amplified audio signal input terminal of the second digital signal processing component 10, the second end of the eighteenth capacitor C18 is connected to the left channel audio input terminal LIN of the second digital signal processor U4, the second end of the nineteenth capacitor C19 is connected to the right channel audio input terminal RIN of the second digital signal processor U4, and the second I2S signal data terminal IIS_D1 of the second digital signal processor U4 is the fourth digital audio signal input terminal of the second digital signal processing component 10.

[0067] The microphone amplifier input component 07 includes an operational amplifier U5, a twentieth capacitor C20, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-third capacitor C23, a twenty-fourth capacitor C24, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, a twenty-ninth capacitor C29, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14 and a fifteenth resistor R15.

[0068] The non-inverting input terminal IN+ of the operational amplifier U5 is connected to the first end of the eleventh resistor R11 and the first end of the twenty-fourth capacitor C24, the second end of the eleventh resistor R11 is connected to the second end of the twenty-fourth capacitor C24, the first end of the twenty-fifth capacitor C25, the first end of the twenty-sixth capacitor C26, the first end of the thirteenth resistor R13 and the first end of the fourteenth resistor R14, the inverting input terminal IN- of the operational amplifier U5 is connected to the first end of the tenth resistor R10, the first end of the twenty-third capacitor C23 and the first end of the twelfth resistor R12, the second end of the twelfth resistor R12 is connected to the first end of the twenty-seventh capacitor C27, the second end of the twenty-seventh capacitor C27 and the first end of the sixteenth resistor R16 together constitute a microphone amplifier The second original analog audio signal input terminal of the large input component 07, the second end of the sixteenth resistor R16 is connected to the first end of the fifteenth resistor R15 and the first end of the twenty-eighth capacitor C28, the power supply terminal VDD of the operational amplifier U5, the first end of the twenty-first capacitor C21, the first end of the twenty-second capacitor C22, the second end of the fourteenth resistor R14, the second end of the fifteenth resistor R15 and the first end of the twenty-ninth capacitor C29 are connected to the third power supply VCC, the output terminal OUT of the operational amplifier U5 is connected to the first end of the twentieth capacitor C20, the second end of the tenth resistor R10 and the second end of the twenty-third capacitor C23, and the second end of the twentieth capacitor C20 is the second analog amplified audio signal output terminal of the microphone amplifier input component 07.

[0069] The following is a combination of working principles Figure 4 and Figure 5 As shown for further explanation:

[0070] First, in the auxiliary machine, the inverting input terminal IN- of the operational amplifier U5 receives the second original analog audio signal, and the operational amplifier U5 generates a second analog amplified audio signal according to the second original analog audio signal; the second amplification input component 08 generates a third analog amplified audio signal according to the received third original analog audio signal; the first analog-to-digital conversion component 09 generates a fourth digital audio signal according to the third analog amplified audio signal; the left channel audio input terminal LIN of the second digital signal processor U4 and the right channel audio input terminal RIN of the second digital signal processor U4 receive the second analog amplified audio signal, the second I2S signal data terminal IIS_D1 of the second digital signal processor U4 receives the fourth digital audio signal, the second digital signal processor U4 generates a fifth digital audio signal according to the second analog amplified audio signal and / or the fourth digital audio signal, and outputs it from the first I2S signal data terminal IIS_D2 of the second digital signal processor U4 to the second wireless component 05, and the second wireless component 05 generates a first audio communication signal according to the fifth digital audio signal.

[0071] Then, in the host, the first wireless component 01 generates a first digital audio signal according to the first audio communication signal received from the wireless link, the serial audio data input terminal SDA of the stereo digital-to-analog converter U1 receives the first digital audio signal, the stereo digital-to-analog converter U1 generates a first analog audio signal according to the first digital audio signal and outputs it from the right channel analog output terminal AOUTR of the stereo digital-to-analog converter U1 and the left channel analog output terminal AOUTL of the stereo digital-to-analog converter U1 to the inverted right channel audio input terminal INR- of the stereo headphone amplifier U2 and the inverted left channel audio input terminal INL- of the stereo headphone amplifier U2, the stereo headphone amplifier U2 generates a first target audio signal according to the first analog audio signal, and the left channel output terminal OUTL of the stereo headphone amplifier U2 and the right channel output terminal OUTR of the stereo headphone amplifier U2 output the first target audio signal carrying background audio information and first user voice information for playback.

[0072] The first amplifying input component 03 inputs a first original analog audio signal carrying background audio information, first user voice information and second user voice information, and the first amplifying input component 03 generates a first analog amplified audio signal based on the received first original analog audio signal; the left channel audio input terminal LIN of the first digital signal processor U3 and the right channel audio input terminal RIN of the first digital signal processor U3 receive the first analog amplified audio signal, and the first digital signal processor U3 generates a second digital audio signal based on the first analog amplified audio signal and outputs it from the first I2S signal data terminal IIS_D2 of the first digital signal processor U3 to the first wireless component 01, and the first wireless component 01 generates a second audio communication signal based on the second digital audio signal.

[0073] Finally, in the secondary machine, it is configured to generate a third digital audio signal based on the second audio communication signal received from the wireless link, and the second audio output component 06 outputs a second target audio signal to the second terminal (live broadcast platform) based on the third digital audio signal.

[0074] In the embodiment of the present invention, in the host, the first wireless component generates a first digital audio signal according to a first audio communication signal received from a wireless link, and generates a second audio communication signal according to a second digital audio signal; the first audio output component outputs a first target audio signal according to the first digital audio signal; the first amplification input component generates a first analog amplified audio signal according to the received first original analog audio signal; the first digital signal processing component generates the second digital audio signal according to the first analog amplified audio signal; in the slave, the second wireless component generates a third digital audio signal according to the second audio communication signal received from the wireless link, and generates the first audio communication signal according to the fifth digital audio signal; the second audio output component generates a first target audio signal according to the third The digital audio signal outputs a second target audio signal; the microphone amplifier input component generates a second analog amplified audio signal based on the received second original analog audio signal; the second amplifier input component generates a third analog amplified audio signal based on the received third original analog audio signal; the first analog-to-digital conversion component generates a fourth digital audio signal based on the third analog amplified audio signal; the second digital signal processing component generates a fifth digital audio signal based on the second analog amplified audio signal and / or the fourth digital audio signal; thereby realizing the input of three channels of original audio signals, and while inputting background music, the voice information of two hosts (users) can be connected, thereby increasing the number of original audio signal input channels and realizing live broadcasts on the Internet by multiple hosts.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-way wireless audio transmission device, characterized in that: The two-way wireless audio transmission device comprises a host and a secondary device connected to the host; The host comprises: a first wireless component configured to generate a first digital audio signal based on a first audio communication signal received from a wireless link and to generate a second audio communication signal based on a second digital audio signal; a first audio output component connected to the first wireless component and configured to output a first target audio signal according to the first digital audio signal; a first amplification input component configured to generate a first analog amplified audio signal based on a received first original analog audio signal; a first digital signal processing component connected to the first amplifying input component and the first wireless component and configured to generate the second digital audio signal based on the first analog amplified audio signal; The auxiliary machine comprises: a second wireless component configured to generate a third digital audio signal based on the second audio communication signal received from the wireless link and to generate the first audio communication signal based on a fifth digital audio signal; a second audio output component connected to the second wireless component and configured to output a second target audio signal according to the third digital audio signal; A microphone amplifier input component that generates a second analog amplified audio signal based on the received second original analog audio signal; a second amplification input component for generating a third analog amplified audio signal based on a received third original analog audio signal; a first analog-to-digital conversion component connected to the second amplification input component and configured to generate a fourth digital audio signal according to the third analog amplified audio signal; A second digital signal processing component connected to the second wireless component, the microphone amplifier input component and the first analog-to-digital conversion component, and configured to generate a fifth digital audio signal according to the second analog amplified audio signal and / or the fourth digital audio signal; The first audio output component comprises: A first digital-to-analog conversion component connected to the first wireless component and configured to generate a first analog audio signal according to the first digital audio signal; A first headphone amplifier component connected to the first digital-to-analog conversion component and configured to output a first target audio signal according to the first analog audio signal; The first digital-to-analog conversion component includes a stereo digital-to-analog converter, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, and a third resistor; The first end of the first resistor is the first digital audio signal input end of the first digital-to-analog conversion component, the second end of the first resistor is connected to the serial audio data input end of the stereo digital-to-analog converter, the right channel analog output end of the stereo digital-to-analog converter is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the first end of the second resistor, the left channel analog output end of the stereo digital-to-analog converter is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is connected to the first end of the third resistor, the second end of the second resistor and the second end of the third resistor together constitute the first analog audio signal output end of the stereo digital-to-analog converter, the analog power supply end of the stereo digital-to-analog converter and the first end of the third capacitor are commonly connected to the first power supply, the static voltage end of the stereo digital-to-analog converter is connected to the first end of the first capacitor, and the ground end of the stereo digital-to-analog converter, the second end of the first capacitor and the second end of the third capacitor are commonly connected to the power ground; The first ear amplifier component includes a stereo headphone amplifier, a first connector, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor; The charging pump power supply terminal of the stereo headphone amplifier, the positive power supply terminal of the amplifier of the stereo headphone amplifier, the first end of the ninth capacitor, the first end of the eighth capacitor, the first end of the seventh capacitor and the first end of the fifth resistor are connected to the second power supply, the positive terminal of the capacitor of the stereo headphone amplifier is connected to the first end of the tenth capacitor, the second end of the tenth capacitor is connected to the negative terminal of the capacitor of the stereo headphone amplifier, the charging pump output terminal of the stereo headphone amplifier is connected to the negative power supply terminal of the amplifier of the stereo headphone amplifier, the first end of the eleventh capacitor and the first end of the thirteenth capacitor, the reverse right channel audio input terminal of the stereo headphone amplifier is connected to the first end of the seventh resistor, the first end of the ninth resistor and the first end of the fifteenth capacitor, the right channel output terminal of the stereo headphone amplifier is connected to the second end of the ninth resistor, the second end of the fifteenth capacitor and the first end of the first connector, and the left channel output terminal of the stereo headphone amplifier is connected to the first end of the eighth resistor, the first end of the fourteenth capacitor and the second end of the first connector. The reverse left channel audio input terminal of the stereo headphone amplifier is connected to the second end of the eighth resistor, the second end of the fourteenth capacitor and the first end of the fourth resistor, the low level effective shutdown terminal of the stereo headphone amplifier is connected to the second end of the fifth resistor and the first end of the sixth resistor, the second end of the fourth resistor is connected to the first end of the sixth capacitor, the second end of the seventh resistor is connected to the first end of the twelfth capacitor, the second end of the sixth capacitor and the second end of the twelfth capacitor jointly constitute the first analog audio signal input terminal of the first headphone amplifier component, the first end of the first connector and the second end of the first connector jointly constitute the first target audio signal output terminal of the first headphone amplifier component, the signal ground terminal of the stereo headphone amplifier, the positive right channel audio input terminal of the stereo headphone amplifier, the positive left channel audio input terminal of the stereo headphone amplifier, the second end of the sixth resistor, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the ninth capacitor, the second end of the eleventh capacitor and the second end of the thirteenth capacitor are commonly connected to the power ground; The microphone amplifier input component includes an operational amplifier, a 20th capacitor, a 21st capacitor, a 22nd capacitor, a 23rd capacitor, a 24th capacitor, a 25th capacitor, a 26th capacitor, a 27th capacitor, a 28th capacitor, a 29th capacitor, a 10th resistor, an 11th resistor, a 12th resistor, a 13th resistor, a 14th resistor, a 16th resistor and a 15th resistor; The non-inverting input terminal of the operational amplifier is connected to the first end of the eleventh resistor and the first end of the twenty-fourth capacitor, the second end of the eleventh resistor is connected to the second end of the twenty-fourth capacitor, the first end of the twenty-fifth capacitor, the first end of the twenty-sixth capacitor, the first end of the thirteenth resistor and the first end of the fourteenth resistor, the inverting input terminal of the operational amplifier is connected to the first end of the tenth resistor, the first end of the twenty-third capacitor and the first end of the twelfth resistor, the second end of the twelfth resistor is connected to the first end of the twenty-seventh capacitor, the second end of the twenty-seventh capacitor and the first end of the sixteenth resistor jointly constitute the second original analog audio signal input terminal of the microphone amplifier input component, the second end of the sixteenth resistor is connected to the first end of the fifteenth resistor and the first end of the twenty-eighth capacitor, the power supply terminal of the operational amplifier, the first end of the twenty-first capacitor, the first end of the twenty-second capacitor, the second end of the fourteenth resistor, the second end of the fifteenth resistor and the first end of the twenty-ninth capacitor are commonly connected to a third power supply, the output terminal of the operational amplifier is connected to the first end of the twentieth capacitor, the second end of the tenth resistor and the second end of the twenty-third capacitor, and the second end of the twentieth capacitor is the second analog amplified audio signal output terminal of the microphone amplifier input component.

2. The two-way wireless audio transmission device according to claim 1, characterized in that: The first digital signal processing component includes a first digital signal processor, a sixteenth capacitor and a seventeenth capacitor; The first I2S signal data terminal of the first digital signal processor is the second digital audio signal output terminal of the first digital signal processing component, the left channel audio input terminal of the first digital signal processor is connected to the first end of the sixteenth capacitor, the right channel audio input terminal of the first digital signal processor is connected to the first end of the seventeenth capacitor, and the second end of the sixteenth capacitor and the second end of the seventeenth capacitor together constitute the first analog amplified audio signal input terminal of the first digital signal processing component.

3. The two-way wireless audio transmission device according to claim 1, characterized in that: The second audio output component comprises: a second digital-to-analog conversion component connected to the second wireless component and configured to generate a second analog audio signal according to the third digital audio signal; A second headphone amplifier component connected to the second digital-to-analog conversion component and configured to output a second target audio signal according to the second analog audio signal.

4. The two-way wireless audio transmission device as claimed in claim 1, characterized in that: The second digital signal processing component includes a second digital signal processor, an eighteenth capacitor and a nineteenth capacitor; The first I2S signal data terminal of the second digital signal processor is the fifth digital audio signal output terminal of the second digital signal processing component, the first end of the eighteenth capacitor and the first end of the nineteenth capacitor together constitute the second analog amplified audio signal input terminal of the second digital signal processing component, the second end of the eighteenth capacitor is connected to the left channel audio input terminal of the second digital signal processor, the second end of the nineteenth capacitor is connected to the right channel audio input terminal of the second digital signal processor, and the second I2S signal data terminal of the second digital signal processor is the fourth digital audio signal input terminal of the second digital signal processing component.

5. The two-way wireless audio transmission device as claimed in claim 1, characterized in that: The first wireless component and the second wireless component are both 5.8G wireless communication components.

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