Multi-channel audio transmission circuit and device

Abstract

The utility model discloses a multichannel audio transmission circuit and equipment. The circuit comprises a switch module which comprises a control end, an output end and at least two audio input ends; the at least two audio transmission modules are connected with the audio input end, and the audio transmission modules are used for transmitting audio input signals to the audio input end; the control module is connected with the control end of the switch module, and the control module is used for generating a switching control signal according to the signal input state of each audio input end; the audio processing module is connected with the output end of the switch module, and the switch module is used for controlling the target audio input end to be connected with the audio processing module according to the switching control signal; the audio processing module is used for processing an audio input signal transmitted by a target audio input end; the target audio input end is an audio input end of which the signal input state is that the current audio input signal is input. The technical scheme provided by the embodiment of the utility model realizes the application to various sound source signals.

Description

Technical Field

[0001] The utility model relates to the technical field of audio transmission, and particularly relates to a multi-channel audio transmission circuit and device. Background Art

[0002] At present, with the continuous development of audio and video playback devices, the types of input of sound source signals are also increasing. However, the audio and video playback devices on the current market basically have a single and fixed input interface, and a device can only adapt to one type of sound source signal. If it is applied to a usage scenario with multiple sound source signals, one device cannot meet the usage requirements. Therefore, the audio and video playback devices adopted by the prior art have a small applicable range, and if multiple audio and video playback devices are used, it will increase the cost. Content of the Utility Model

[0003] The utility model provides a multi-channel audio transmission circuit and device to solve the problem that the audio and video playback device can only be applicable to a single sound source signal.

[0004] According to one aspect of the utility model, a multi-channel audio transmission circuit is provided, including:

[0005] A switch module, the switch module includes a control end, an output end and at least two audio input ends;

[0006] At least two audio transmission modules, connected to the audio input ends, and the audio transmission modules are used for transmitting audio input signals to the audio input ends;

[0007] A control module, the control module is connected to the control end of the switch module, and the control module is used for generating a switching control signal according to the signal input states of the audio input ends;

[0008] An audio processing module, connected to the output end of the switch module, and the switch module is used for controlling the connection between the target audio input end and the audio processing module according to the switching control signal; the audio processing module is used for processing the audio input signal transmitted by the target audio input end;

[0009] The target audio input end is the audio input end with the signal input state of currently having the audio input signal input.

[0010] Optionally, the control module is multiplexed as the first audio transmission module;

[0011] The control module includes a first signal input end, a first signal output end and a first output end;

[0012] The first signal input terminal is used to receive a first input signal; the first signal output terminal is connected to the first of the audio input terminals; the control module is configured to extract the audio input signal according to the first input signal, and transmit the audio input signal to the audio input terminal through the first signal output terminal;

[0013] The first output terminal of the control module is connected to the control terminal of the switch module, and the control module is configured to generate a first switching control signal according to the signal input states of the audio input terminals; wherein, the switching control signal includes the first switching control signal;

[0014] The switch module is configured to select and connect the audio input terminal connected to the control module as the target audio input terminal according to the switching control signal, and connect it to the audio processing module.

[0015] Optionally, the multi-channel audio transmission circuit further includes:

[0016] An image processing module, the image processing module is electrically connected to the second output terminal of the control module, the control module is further configured to extract a video input signal according to the first input signal, and the image processing module is configured to perform image processing on the video input signal;

[0017] The image processing module includes a second signal input terminal and a second signal output terminal, the second signal output terminal is connected to the second of the audio input terminals; the second signal input terminal is used to receive a second input signal, and the image processing module is configured to extract the audio input signal according to the second input signal, and transmit the audio input signal to the second audio input terminal through the second signal output terminal;

[0018] The third output terminal of the control module is communicatively connected to the image processing module, and the control module is configured to generate a second switching control signal when detecting that the image processing module transmits the audio input signal to the second audio input terminal; wherein, the switching control signal includes the second switching control signal;

[0019] The switch module is configured to select and connect the second audio input terminal connected to the image processing module as the target audio input terminal according to the second switching control signal, and connect it to the audio processing module.

[0020] Optionally, the multi-channel audio transmission circuit further includes:

[0021] A programmable module, the programmable module is connected to the image processing module, and the image processing module is further configured to extract the video input signal according to the second input signal, and the programmable module is configured to perform image processing on the video input signal again;

[0022] The programmable module includes a third signal input terminal and a third signal output terminal, and the third signal output terminal is connected to the third audio input terminal; the third signal input terminal is configured to receive a third input signal, and the programmable module is configured to extract the audio input signal according to the third input signal and transmit the audio input signal to the third audio input terminal through the third signal output terminal;

[0023] The fourth output terminal of the control module is communicatively connected to the programmable module, and the control module is configured to generate a third switching control signal when detecting that the image processing module transmits the audio input signal to the third audio input terminal; wherein, the switching control signal includes the third switching control signal;

[0024] The switch module is configured to select and connect the third audio input terminal connected to the programmable module as the target audio input terminal according to the third switching control signal and connect it to the audio processing module.

[0025] Optionally, the control module further includes: a fourth signal input terminal, the fourth signal input terminal is configured to receive a fourth input signal, and the control module is configured to extract the audio input signal according to the fourth input signal and transmit the audio input signal to the audio input terminal through the first signal output terminal.

[0026] Optionally, the switch module includes:

[0027] A switch chip, a first audio input interface, a second audio input interface, a third audio input interface, a controlled interface, and an audio output interface;

[0028] The input terminal of the switch chip is connected to the first audio input interface, the second audio input interface, and the third audio input interface; the output terminal of the switch chip is connected to the audio output interface; and the control terminal of the switch chip is connected to the controlled interface;

[0029] The first audio input interface is connected to the first signal output end of the control module, the second audio input interface is connected to the second signal output end of the image processing module, and the third audio input interface is connected to the third signal output end of the programmable module; the controlled interface is connected to the first output end of the control module; the audio output interface is connected to the audio processing module; the switch chip is used to connect the first audio input interface, the second audio input interface or the third audio input interface to the audio processing module according to the switching control signal of the control module.

[0030] Optionally, the audio processing module includes:

[0031] An audio processing chip, an input interface, an output interface and an audio processing circuit;

[0032] The input end of the audio processing chip is connected to the input interface; the output end of the audio processing chip is connected to the output interface; the processing end of the audio processing chip is connected to the audio processing circuit;

[0033] The input interface is connected to the audio output interface; the audio processing circuit is used to perform audio processing on the audio input signal, and the output interface is used to output the processed audio input signal.

[0034] Optionally, the image processing module further includes:

[0035] An input switching unit, the first input end of the input switching unit is electrically connected to the control module, the second input end of the input switching unit serves as the second signal input end of the image processing module, and the third input end of the input switching unit is communicatively connected to the control module;

[0036] An image conversion unit, connected to the input switching unit, the input switching unit is used to connect the first input end or the second input end of the input switching unit to the image conversion unit according to the input signal of the first signal input end or the second signal input end of the switching unit, and the image conversion unit is used to perform image format conversion on the video input signal; the first output end of the image conversion unit serves as the second signal output end of the image processing module, and the second output end of the image conversion unit is connected to the programmable module.

[0037] Optionally, the multi-channel audio transmission circuit further includes:

[0038] A display module, connected to the programmable module, for performing image display according to the video input signal;

[0039] A sound generation module, connected to the audio processing module, for generating a driving signal according to the audio input signal;

[0040] A sound generating device, connected to the sound generation module, for generating sound according to the driving signal;

[0041] The sound generation module includes: a sound generation chip, an input interface, and a sound generation circuit; the input interface is connected to the sound generation chip through the sound generation circuit; the input interface is connected to the output interface of the audio processing module, and the sound generation chip is used to drive the sound generating device to generate sound according to the driving signal.

[0042] An embodiment of the present invention further provides a multi-channel audio transmission device, including: the multi-channel audio transmission circuit according to any embodiment of the present invention.

[0043] The technical solution provided by the embodiment of the present invention realizes the input of at least two audio input signals by setting at least two audio transmission modules, improves the applicability of the multi-channel audio transmission circuit, and realizes the selection of the audio input end with an audio input signal input by setting a switch module and a control module. Moreover, the audio processing module realizes the audio processing of the audio input signal, so that it can be applied to the broadcast and sound generation of sound. The embodiment of the present invention is applicable to an audio transmission circuit with multiple input signals, and the connection between the target audio input end and the audio processing module can be controlled by switching the control signal, having a good control effect.

[0044] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 is a schematic structural diagram of a multi-channel audio transmission circuit according to an embodiment of the present invention;

[0047] Figure 2 is a schematic structural diagram of another multi-channel audio transmission circuit according to an embodiment of the present invention;

[0048] Figure 3It is a schematic structural diagram of another multi-channel audio transmission circuit provided according to an embodiment of the present invention;

[0049] Figure 4 It is a schematic structural diagram of another multi-channel audio transmission circuit provided according to an embodiment of the present invention;

[0050] Figure 5 It is a schematic structural diagram of another multi-channel audio transmission circuit provided according to an embodiment of the present invention;

[0051] Figure 6 It is a circuit diagram of a switch module provided according to an embodiment of the present invention;

[0052] Figure 7 It is a circuit diagram of an audio processing module provided according to an embodiment of the present invention;

[0053] Figure 8 It is a circuit diagram of a sound generating module provided according to an embodiment of the present invention. Detailed implementation manners

[0054] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0055] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0056] The embodiments of the present invention provide a multi-channel audio transmission circuit. Figure 1 It is a schematic structural diagram of a multi-channel audio transmission circuit provided according to an embodiment of the present invention. Refer to Figure 1, the circuit includes: a switch module 1, at least two audio transmission modules 2, a control module 3, and an audio processing module 4. The switch module 1 includes a control terminal, an output terminal, and at least two audio input terminals. The at least two audio transmission modules 2 are connected to the audio input terminals, and the audio transmission module 2 is used to transmit an audio input signal to the audio input terminal. The control module 3 is connected to the control terminal of the switch module 1, and the control module 3 is used to generate a switching control signal according to the signal input status of each audio input terminal. The audio processing module 4 is connected to the output terminal of the switch module 1, and the switch module 1 is used to connect the target audio input terminal to the audio processing module 4 according to the switching control signal; the audio processing module 4 is used to process the audio input signal transmitted by the target audio input terminal. The target audio input terminal is the audio input terminal whose signal input status is currently having an audio input signal input.

[0057] Among them, each audio transmission module 2 can be provided with a signal input terminal, and multiple audio transmission modules 2 have multiple signal input terminals. The input of each signal input terminal can be the same type of input signal or different types of input signals. The audio transmission module 2 can extract the audio input signal from the input signal and input it into the audio processing module 4 through the switch module 1. The audio processing module 4 receives the audio input signal and performs audio processing on it so that it can be applied to the broadcast and sound generation of sound. Exemplarily, the audio processing module 4 can encode or decode the audio input signal and generate sound through a sound generating device such as a speaker or a headphone.

[0058] However, at the same moment, only one audio transmission module 2 will input an audio input signal to the switch module 1. Therefore, when there are multiple audio transmission modules 2, the switch module 1 needs to selectively connect the audio transmission module 2 with an audio input signal to the audio processing module 4. The control module 3 can detect the signal input status of each audio input terminal. If a certain audio input terminal has a signal input, the audio input terminal is set as the target audio input terminal, and the connection between the target audio input terminal and the audio processing module 4 is turned on.

[0059] The technical solution provided by the embodiment of the present invention realizes the input of at least two audio input signals by setting at least two audio transmission modules 2, improves the applicability of the multi-channel audio transmission circuit, and realizes the selection of the audio input terminal with an audio input signal input by setting the switch module 1 and the control module 3. Moreover, the audio processing of the audio input signal is realized through the audio processing module 4 so that it can be applied to the broadcast and sound generation of sound. The embodiment of the present invention is applicable to an audio transmission circuit with multiple input signals, and the connection between the target audio input terminal and the audio processing module 4 can be controlled through a switching control signal, having a good control effect.

[0060] Figure 2This is a schematic structural diagram of another multi-channel audio transmission circuit provided by an embodiment of the present invention. Refer to Figure 2 , based on the above embodiments, optionally, the control module 3 is multiplexed as the first audio transmission module 2. The control module 3 includes a first signal input end, a first signal output end, and a first output end. The first signal input end is used to receive a first input signal; the first signal output end is connected to the first audio input end; the control module 3 is used to extract an audio input signal according to the first input signal, and transmit the audio input signal to the audio input end through the first signal output end. The first output end of the control module 3 is connected to the control end of the switch module 1, and the control module 3 is used to generate a first switching control signal according to the signal input state of each audio input end; wherein, the switching control signal includes the first switching control signal. The switch module 1 is used to select and connect the audio input end connected to the control module 2 as the target audio input end according to the switching control signal, and connect it to the audio processing module 4.

[0061] Among them, the first signal input end of the control module 3 can be an asynchronous interface. Exemplarily, it can be connected to a host computer through the asynchronous interface. When the host computer sends a first input signal, the control module 3 can detect that there is an input signal at the first signal input end and generate a first switching control signal to form a path between the control module 3 and the audio processing module 4. After the control module 3 extracts the audio input signal in the first input signal, it inputs the audio input signal into the audio processing module 4 to perform audio processing on the audio input signal, so that the converted audio input signal can be sounded through a sounding device.

[0062] Figure 3 This is a schematic structural diagram of yet another multi-channel audio transmission circuit provided by an embodiment of the present invention. Refer to Figure 3, based on the above embodiments, optionally, the multi-channel audio transmission circuit further includes: an image processing module 5, the image processing module 5 is electrically connected to the second output end of the control module 3, and the control module 3 is further configured to extract a video input signal according to the first input signal, and the image processing module 5 is configured to perform image processing on the video input signal. The image processing module 5 includes a second signal input end and a second signal output end, and the second signal output end is connected to the second audio input end; the second signal input end is used to receive a second input signal, and the image processing module 5 is configured to extract an audio input signal according to the second input signal, and transmit the audio input signal to the second audio input end through the second signal output end. The third output end of the control module 3 is communicatively connected to the image processing module 5, and the control module 3 is configured to generate a second switching control signal when detecting that the image processing module 5 transmits the audio input signal to the second audio input end; wherein, the switching control signal includes the second switching control signal. The switch module 1 is configured to select and connect the second audio input end connected to the image processing module 5 as the target audio input end according to the second switching control signal, and connect it to the audio processing module 4.

[0063] Among them, the second signal input end of the image processing module 5 can be an HDMI LOOP interface (High Definition Multimedia Interface Loop). When the second input signal is input through the HDMI LOOP interface, the image processing module 5 can extract the audio input signal and the video input signal from the second input signal. At the same time, the control module 3 can detect that the second input signal is input to the second signal input end, and generate a second switching control signal to form a path between the image processing module 5 and the audio processing module 4. The image processing module 5 inputs the audio input signal into the audio processing module 4 through the switch module 1 for audio processing. The image processing module 5 can also perform video processing on the video input signal.

[0064] When there is an input signal at the first signal input end and no input signal at the second signal input end, the control module 3 forms a path with the audio processing module 4. The control module 3 can also input the video input signal extracted from the first input signal into the image processing module 5, and perform image processing on the video input signal.

[0065] Continue to refer to Figure 3, based on the above embodiments, optionally, the multi-channel audio transmission circuit further includes: a programmable module 6, the programmable module 6 is connected to the image processing module 5, and the image processing module 5 is further configured to extract a video input signal according to a second input signal, and the programmable module 6 is configured to perform image processing on the video input signal again. The programmable module 6 includes a third signal input terminal and a third signal output terminal, and the third signal output terminal is connected to a third audio input terminal; the third signal input terminal is configured to receive a third input signal, and the programmable module 6 is configured to extract an audio input signal according to the third input signal and transmit the audio input signal to the third audio input terminal through the third signal output terminal. The fourth output terminal of the control module 3 is communicatively connected to the programmable module 6, and the control module 3 is configured to generate a third switching control signal when detecting that the image processing module 5 transmits an audio input signal to the third audio input terminal; wherein, the switching control signal includes the third switching control signal. The switch module 1 is configured to select and connect the third audio input terminal connected to the programmable module 6 as the target audio input terminal according to the third switching control signal and connect it to the audio processing module 4.

[0066] Wherein, the third signal input terminal of the programmable module 6 can be an SFP+ interface (Small Form-factor Pluggable), which can be used to receive signals transmitted by optical fibers. The programmable module 6 can include: an FPGA (Field-Programmable Gate Array). When a third input signal is input to the third signal input terminal of the programmable module 6, the programmable module 6 can extract an audio input signal and a video input signal from the third input signal. At the same time, the control module 3 can detect that a third input signal is input to the third signal input terminal and generate a third switching control signal to form a path between the programmable module 6 and the audio processing module 4. The programmable module 6 inputs the audio input signal into the audio processing module 4 through the switch module 1 for audio processing. The programmable module 6 can also perform video processing on the video input signal.

[0067] When there is an input signal at the second signal input terminal and no input signal at the third signal input terminal, the image processing module 5 and the audio processing module 4 form a path. The image processing module 5 can also input the video input signal after image processing into the programmable module 6, and the programmable module 6 can perform video processing on the video input signal again.

[0068] Continue to refer to Figure 3 , based on the above embodiments, optionally, the control module 3 further includes: a fourth signal input terminal, the fourth signal input terminal is configured to receive a fourth input signal, and the control module 3 is configured to extract an audio input signal according to the fourth input signal and transmit the audio input signal to the audio input terminal through the first signal output terminal.

[0069] Among them, the fourth signal input terminal of the control module 3 can be an HDMIIN interface (High Definition Multimedia Interface in). When a fourth input signal is input through the HDMIIN interface, the control module 3 can detect that there is an input signal at the fourth signal input terminal and generate a first switching control signal to form a path between the control module 3 and the audio processing module 4. After extracting the audio input signal and the video input signal from the fourth input signal, the control module 3 inputs the audio input signal into the audio processing module 4 and inputs the video input signal into the image processing module 5, that is, the audio input signal in the fourth input signal and the audio input signal in the first input signal can share the first signal output terminal.

[0070] Figure 4 This is a schematic structural diagram of another multi-channel audio transmission circuit provided by an embodiment of the present invention. Refer to Figure 4 , on the basis of the above embodiments, optionally, the multi-channel audio transmission circuit further includes: a display module 7, a sound generating module 8, and a sounding device 9. The display module 7 is connected to the programmable module 6 and is used for image display according to the video input signal. The sound generating module 8 is connected to the audio processing module 4 and is used for generating a driving signal according to the audio input signal. The sounding device 9 is connected to the sound generating module 8 and is used for sounding according to the driving signal.

[0071] Exemplarily, the input signals of each signal input terminal can be audio-video input signals. After the audio processing module 4 processes the extracted audio input signal, a driving signal is generated through the sound generating module 8 to control the sounding device 9 to sound. Exemplarily, the sounding device 9 can include: speakers, headphones, etc. At the same time, the display module 7 displays the input video input signal, so as to realize the synchronization of the image and the sound. Exemplarily, the display module 7 can include: display devices such as TVs, monitors, etc.

[0072] Figure 5 This is a schematic structural diagram of another multi-channel audio transmission circuit provided by an embodiment of the present invention. Refer to Figure 5, based on the above embodiments, optionally, the image processing module 5 further includes: an input switching unit 51, the first input end of the input switching unit 51 is electrically connected to the control module 3, the second input end of the input switching unit 51 serves as the second signal input end of the image processing module 5, and the third input end of the input switching unit 51 is communicatively connected to the control module 3. An image conversion unit 52, connected to the input switching unit 51, the input switching unit 51 is configured to connect the first input end of the input switching unit 51 or the second input end of the input switching unit 51 to the image conversion unit 52 according to the input signal at the first signal input end or the second signal input end of the input switching unit 51, and the image conversion unit 52 is configured to perform image format conversion on the video input signal; the first output end of the image conversion unit 52 serves as the second signal output end of the image processing module 5, and the second output end of the image conversion unit 52 is connected to the programmable module 6.

[0073] Among them, the input switching unit 51 is a multi-select-one switching unit. Exemplarily, the input switching unit 51 can be a two-select-one switching unit. When there is an input signal at the first signal input end or the fourth signal input end, it means that there is no input signal at the second signal input end of the image processing module 5, that is, there is no input signal at the second input end of the input switching unit 51, and the input switching unit 51 connects the control module 3 and the image conversion unit 52. When there is an input signal at the second signal input end of the image processing module 5, that is, there is an input signal at the second input end of the input switching unit 51, at this time, there is no input signal at the first signal input end and the fourth signal input end, and the input switching unit 51 connects the second input end of the input switching unit 51 and the image conversion unit 52.

[0074] The image conversion unit 52 is configured to extract the audio input signal and the video input signal from the input signal, and input the extracted audio input signal into the switch module 1. The image conversion unit 52 can also perform image format conversion on the video input signal. Exemplarily, the image conversion unit 52 can convert the video input signal into a 24-bit RGB image signal and input it into the programmable module 6.

[0075] Figure 6 This is a circuit diagram of a switch module provided by an embodiment of the present invention. Combined with Figure 5 and Figure 6, based on the above embodiments, optionally, the switch module 1 includes: a switch chip 16, a first audio input interface 11, a second audio input interface 12, a third audio input interface 13, a controlled interface 14, and an audio output interface 15. The input end of the switch chip 16 is connected to the first audio input interface 11, the second audio input interface 12, and the third audio input interface 13; the output end of the switch chip 16 is connected to the audio output interface 15; the control end of the switch chip 16 is connected to the controlled interface 14. The first audio input interface 11 is connected to the first signal output end of the control module 3, the second audio input interface 12 is connected to the second signal output end of the image processing module 5, and the third audio input interface 13 is connected to the third signal output end of the programmable module 6; the controlled interface 15 is connected to the first output end of the control module 3; the audio output interface 15 is connected to the audio processing module 4; the switch chip 16 is configured to connect the first audio input interface 11, the second audio input interface 12, or the third audio input interface 13 to the audio processing module 4 according to the switching control signal of the control module 3.

[0076] Among them, the first audio input interface 11, the second audio input interface 12, and the third audio input interface 13 can be a multi-input interface solution, and the audio output interface 15 can also be a multi-output interface solution. As Figure 6 shown, the first audio input interface 11, the second audio input interface 12, and the third audio input interface 13 can each include 4 input interfaces, and the audio output interface 15 can include 4 output interfaces. The third audio input interface 13 is connected in parallel with the second audio input interface 12 through the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4. The switch chip 16 is connected to the control module 3 through the controlled interface 14. When the control module 3 issues a switching control signal, the switching control signal can be input into the switch chip 16 through the controlled interface 14, and the switch chip 16 connects one of the audio input interfaces to the audio processing module 4 according to the switching control signal.

[0077] Figure 7 This is a circuit diagram of an audio processing module provided by an embodiment of the present invention. Combining Figure 5 and Figure 7 , based on the above embodiments, optionally, the audio processing module 4 includes: an audio processing chip 4, an input interface 42, an output interface 43, and an audio processing circuit 44. The input end of the audio processing chip 4 is connected to the input interface 42; the output end of the audio processing chip 4 is connected to the output interface 43; the processing end of the audio processing chip 4 is connected to the audio processing circuit 44. The input interface 42 is connected to the audio output interface 15; the audio processing circuit 44 is configured to perform audio processing on the audio input signal, and the output interface 43 is configured to output the processed audio input signal. [[ID=]14]

[0078] Exemplarily, the audio processing chip 41 can be a codec chip, which is used to process signals for voice and audio playback, and encode and decode signals such as audio. The input interface 42 can receive the output signal of the audio output interface 15, and perform audio processing through the audio processing circuit 44 and the audio processing chip 41. The audio processing circuit 44 includes a first inductor L1. One end of the first inductor L1 can be connected to a power supply to supply power to the audio processing chip 41. The audio processing circuit 44 further includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6, which are used to ensure the stable operation of the audio processing chip 41. The output interface 43 is connected to the sound generating module 8, and is used to output the processed audio input signal and drive sound generation through the sound generating module 8.

[0079] The audio processing chip 41 further includes a clock interface 45 and a call input interface 44. The clock interface 45 is used to provide a clock signal for the transmission or processing of the audio input signal. The call input interface 44 can be connected to a microphone to implement the sound source input function of the microphone.

[0080] Figure 8 This is a circuit diagram of a sound generating module provided by an embodiment of the present invention. Combining Figure 5 and Figure 8 , on the basis of the above embodiments, optionally, the sound generating module 8 includes: a sound generating chip 81, an input interface 82, and a sound generating circuit 83; the input interface 82 is connected to the sound generating chip 81 through the sound generating circuit 83. The input interface 82 is connected to the output interface of the audio processing module 4. The sound generating chip 81 is used to drive the sound generating device 9 to generate sound according to the driving signal.

[0081] Among them, the sound generating circuit 83 includes: a seventh capacitor C7, an eighth capacitor C8, a fifth resistor R5, a sixth resistor R6, a first electrostatic tube D1, and a second electrostatic tube D2. The first electrostatic tube D1 and the second electrostatic tube D2 are used to ensure that the sound generating module 8 is protected from damage caused by electrostatic discharge. The sound generating module 8 further includes a seventh resistor R7 and an eighth resistor R8. There can be multiple input interfaces 82. One of the input interfaces 82 is connected to the sound generating chip 81 through the sound generating circuit 83, and the other input interface 82 is connected to the sound generating chip 81 through the eighth resistor R8. The processed audio input signal can be input into the sound generating chip 81 through the sound generating circuit 83. Through the sound generating chip 81, the sound generating device 9 can be driven to generate a sound that matches the audio input signal according to the audio input signal.

[0082] The embodiment of the present invention further provides a multi-channel audio transmission device, which includes: the multi-channel audio transmission circuit provided by any embodiment of the present invention, and has the beneficial effects of the multi-channel audio transmission circuit provided by any of the above embodiments, which will not be elaborated here.

[0083] It should be understood that the various forms of processes shown above can be used, with steps reordered, added or deleted. For example, the steps described in the present utility model can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present utility model can be achieved, and no limitation is imposed herein.

[0084] The above specific embodiments do not constitute a limitation on the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-channel audio transmission circuit, characterized in that, Comprising: A switch module, the switch module including a control end, an output end, and at least two audio input ends; At least two audio transmission modules, connected to the audio input ends, the audio transmission modules being used for transmitting audio input signals to the audio input ends; A control module, the control module being connected to the control end of the switch module, the control module being used for generating a switching control signal according to the signal input states of the audio input ends; An audio processing module, connected to the output end of the switch module, the switch module being used for controlling the connection between a target audio input end and the audio processing module according to the switching control signal; the audio processing module being used for processing the audio input signal transmitted by the target audio input end; The target audio input end is the audio input end with the signal input state being the one currently having the audio input signal input.

2. The multi-channel audio transmission circuit according to claim 1, characterized in that, The control module is multiplexed as the first audio transmission module; The control module includes a first signal input end, a first signal output end, and a first output end; The first signal input end is used for receiving a first input signal; the first signal output end is connected to the first audio input end; The control module is used for extracting the audio input signal according to the first input signal and transmitting the audio input signal to the audio input end through the first signal output end; The first output end of the control module is connected to the control end of the switch module, the control module being used for generating a first switching control signal according to the signal input states of the audio input ends; wherein, the switching control signal includes the first switching control signal; The switch module is used for selecting and connecting the audio input end connected to the control module as the target audio input end and connecting it to the audio processing module according to the switching control signal.

3. The multi-channel audio transmission circuit according to claim 2, wherein The multi-channel audio transmission circuit further includes: An image processing module, the image processing module being electrically connected to the second output end of the control module, the control module being further used for extracting a video input signal according to the first input signal, the image processing module being used for performing image processing on the video input signal; The image processing module includes a second signal input end and a second signal output end, the second signal output end being connected to the second audio input end; the second signal input end is used for receiving a second input signal, the image processing module being used for extracting the audio input signal according to the second input signal and transmitting the audio input signal to the second audio input end through the second signal output end; The third output end of the control module is communicatively connected to the image processing module, the control module being used for generating a second switching control signal when detecting that the image processing module transmits the audio input signal to the second audio input end; wherein, the switching control signal includes the second switching control signal; The switch module is configured to select and connect the second audio input terminal connected to the image processing module as the target audio input terminal according to the second switching control signal, and connect it to the audio processing module.

4. The multi-channel audio transmission circuit according to claim 3, characterized in that, The multi-channel audio transmission circuit further includes: A programmable module, which is connected to the image processing module. The image processing module is further configured to extract the video input signal according to the second input signal, and the programmable module is configured to perform image processing on the video input signal again; The programmable module includes a third signal input terminal and a third signal output terminal. The third signal output terminal is connected to the third audio input terminal; the third signal input terminal is configured to receive a third input signal, and the programmable module is configured to extract the audio input signal according to the third input signal and transmit the audio input signal to the third audio input terminal through the third signal output terminal; The fourth output terminal of the control module is communicatively connected to the programmable module. The control module is configured to generate a third switching control signal when detecting that the image processing module transmits the audio input signal to the third audio input terminal; wherein, the switching control signal includes the third switching control signal; The switch module is configured to select and connect the third audio input terminal connected to the programmable module as the target audio input terminal according to the third switching control signal, and connect it to the audio processing module.

5. The multi-channel audio transmission circuit according to claim 4, wherein, The control module further includes: a fourth signal input terminal, which is configured to receive a fourth input signal. The control module is configured to extract the audio input signal according to the fourth input signal and transmit the audio input signal to the audio input terminal through the first signal output terminal.

6. The multi-channel audio transmission circuit according to claim 4, wherein The switch module includes: A switch chip, a first audio input interface, a second audio input interface, a third audio input interface, a controlled interface, and an audio output interface; The input terminal of the switch chip is connected to the first audio input interface, the second audio input interface, and the third audio input interface; the output terminal of the switch chip is connected to the audio output interface; the control terminal of the switch chip is connected to the controlled interface; The first audio input interface is connected to the first signal output terminal of the control module, the second audio input interface is connected to the second signal output terminal of the image processing module, and the third audio input interface is connected to the third signal output terminal of the programmable module; the controlled interface is connected to the first output terminal of the control module; the audio output interface is connected to the audio processing module; the switch chip is configured to connect the first audio input interface, the second audio input interface, or the third audio input interface to the audio processing module according to the switching control signal of the control module.

7. The multi-channel audio transmission circuit according to claim 6, characterized in that, The audio processing module includes: An audio processing chip, an input interface, an output interface, and an audio processing circuit; The input end of the audio processing chip is connected to the input interface; the output end of the audio processing chip is connected to the output interface; the processing end of the audio processing chip is connected to the audio processing circuit; The input interface is connected to the audio output interface; the audio processing circuit is used for performing audio processing on the audio input signal, and the output interface is used for outputting the processed audio input signal.

8. The multi-channel audio transmission circuit according to claim 4, characterized in that The image processing module further includes: An input switching unit, the first input end of the input switching unit is electrically connected to the control module, the second input end of the input switching unit serves as the second signal input end of the image processing module, and the third input end of the input switching unit is communicatively connected to the control module; An image conversion unit, connected to the input switching unit, the input switching unit is used to connect the first input end or the second input end of the input switching unit to the image conversion unit according to the input signal of the first signal input end or the second signal input end of the switching unit, and the image conversion unit is used for performing image format conversion on the video input signal; the first output end of the image conversion unit serves as the second signal output end of the image processing module, and the second output end of the image conversion unit is connected to the programmable module.

9. The multi-channel audio transmission circuit according to claim 7, wherein, The multi-channel audio transmission circuit further includes: A display module, connected to the programmable module, for performing image display according to the video input signal; A sound generating module, connected to the audio processing module, for generating a driving signal according to the audio input signal; A sounding device, connected to the sound generating module, for sounding according to the driving signal; The sound generating module includes: a sound generating chip, an input interface, and a sound generating circuit; the input interface is connected to the sound generating chip through the sound generating circuit; the input interface is connected to the output interface of the audio processing module, and the sound generating chip is used to drive the sounding device to sound according to the driving signal.

10. A multi-channel audio transmission device, characterized in that, Comprising: The multi-channel audio transmission circuit according to any one of claims 1-9.

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