Audio conversion device

Abstract

The utility model discloses an audio conversion device, and the device comprises a plurality of audio interfaces, the plurality of audio interfaces comprise an A2B signal interface and at least two other signal interfaces, the A2B signal interface is used for transmitting A2B audio signals, and each other signal interface is used for transmitting different types of other audio signals; a control circuit; and the signal conversion circuit is respectively connected with the control circuit and each audio interface and is used for receiving the control signal of the control circuit so as to realize conversion between the audio signals corresponding to the two audio interfaces. According to the scheme, the audio format conversion convenience can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of audio conversion, and in particular to an audio conversion device. Background Art

[0002] With the increasing popularity of in-car audio power amplifiers (hereinafter referred to as "car amplifiers"), more and more cars are equipped with them. A2B technology is widely used in car amplifiers. Existing solutions use a power module, signal processing module, input module, control module, and audio bus module to convert A2B (Automotive Audio Bus) signals to and from USB (Universal Serial Bus) signals. However, the types of signals that can be converted are relatively limited, limiting their application scenarios. Utility Model Content

[0003] This application at least provides an audio conversion device that can improve the convenience of audio format conversion.

[0004] In the first aspect of the present application, there is provided an audio conversion device, which includes: multiple audio interfaces, including an A2B signal interface and at least two other signal interfaces, the A2B signal interface is used to transmit A2B audio signals, and each other signal interface is used to transmit different types of other audio signals; a control circuit; and a signal conversion circuit, which is respectively connected to the control circuit and each audio interface, and is used to receive the control signal of the control circuit to realize the conversion between the audio signals corresponding to the two audio interfaces.

[0005] Among them, other signal interfaces include at least one of the following: an analog signal interface, a preset signal interface, a USB signal interface and a Bluetooth signal interface; among them, the analog signal interface is used to transmit analog audio signals; the preset signal interface is used to transmit SPDIF audio signals or optical fiber audio signals; the USB signal interface is used to transmit USB digital audio signals; and the Bluetooth signal interface is used to transmit Bluetooth audio signals.

[0006] Among them, the signal conversion circuit includes multiple conversion modules, each conversion module is connected to at least one audio interface, and different conversion modules are connected to different audio interfaces. The conversion module is used to convert between associated audio signals and audio signals in a preset format. The associated audio signal is the audio signal corresponding to the audio interface connected to the conversion module.

[0007] Among them, multiple conversion modules include an A2B conversion module and at least one other conversion module, wherein the A2B conversion module is connected to the A2B signal interface and the control circuit, and is used to convert the first A2B audio signal input by the A2B signal interface into a first digital audio signal in a preset format and then input it into the control circuit, or convert the second digital audio signal in a preset format output by the control circuit into a second A2B audio signal and then output it through the A2B signal interface; each other conversion module is connected to at least one other signal interface and the control circuit, and is used to convert the first other audio signal input by the other signal interface to which it is connected into a third digital audio signal in a preset format and then input it into the control circuit, or convert the fourth digital audio signal in a preset format output by the control circuit into a second other audio signal and then output it through the other signal interface to which it is connected.

[0008] Among them, the other signal interfaces include at least one of the following: an analog signal interface, a preset signal interface, a USB signal interface and a Bluetooth signal interface; wherein, when the other signal interface includes an analog signal interface, at least one other conversion module includes a digital-to-analog conversion module connected to the analog signal interface; when the other signal interface includes a USB signal interface, at least one other conversion module includes a USB conversion module connected to the USB signal interface; when the other signal interface includes a Bluetooth signal interface, at least one other conversion module includes a Bluetooth conversion module connected to the Bluetooth signal interface; when the other signal interface includes a preset signal interface, the preset signal interface is directly connected to the control circuit, and the preset signal interface is an SPDIF signal interface or an optical fiber signal interface.

[0009] In which, the control circuit includes a digital signal processing circuit and a controller connected to each other; in which, the A2B conversion module is connected to the digital signal processing circuit and the controller, and each other conversion module is connected to the digital signal processing circuit and the controller; and / or, when other signal interfaces include a preset signal interface, the preset signal interface is directly connected to the digital signal processing circuit, and the preset signal interface is an SPDIF signal interface or an optical fiber signal interface.

[0010] Among them, the audio conversion device also includes a power input interface and a power module connected to each other. The power module is connected to the signal conversion circuit and the control circuit respectively, and is used to use the external power supply connected to the power input interface to power the signal conversion circuit and the control circuit.

[0011] The power supply module includes multiple voltage regulating units, each of which is used to output a different input voltage.

[0012] Among them, other signal interfaces include an analog signal interface, a preset signal interface, a USB signal interface and a Bluetooth signal interface, the preset signal interface is an SPDIF signal interface or an optical fiber signal interface, the signal conversion circuit includes an A2B conversion module connected to the A2B signal interface, a digital-to-analog conversion module connected to the analog signal interface, a USB conversion module connected to the USB signal interface, and a Bluetooth conversion module connected to the Bluetooth signal interface; wherein, multiple voltage regulating units include a first voltage stabilizing unit, a first buck-boost unit and a second buck-boost unit, the input end of the first voltage stabilizing unit is connected to the external power supply, and the output end of the first voltage stabilizing unit is connected to the A2B conversion module; the input end of the first buck-boost unit is connected to the external power supply, and the output end of the first buck-boost unit is connected to the digital-to-analog conversion module; the input end of the second buck-boost unit is connected to the external power supply, and the output end of the second buck-boost unit is respectively connected to the USB conversion module, the Bluetooth conversion module and the control circuit.

[0013] In which, the control circuit includes a digital signal processing circuit and a controller connected to each other, and the output end of the second buck-boost unit is respectively connected to the digital signal processing circuit and the controller; and / or, the control circuit includes a digital signal processing circuit, and the multiple voltage regulation units also include a second voltage stabilizing unit, the input end of the second voltage stabilizing unit is connected to the output end of the second buck-boost unit, and the output end of the second voltage stabilizing unit is connected to the digital signal processing circuit.

[0014] The above scheme uses the control circuit to send a control signal to the signal conversion circuit. After receiving the control signal, the signal conversion circuit converts the A2B signal corresponding to the A2B signal interface into an audio signal corresponding to other signal interfaces according to the control signal, or converts the audio signal corresponding to other signal interfaces into an A2B signal corresponding to the A2B signal interface, or converts the audio signal corresponding to one of the other signal interfaces into an audio signal corresponding to another other signal interface. Through this device, conversion between multiple audio formats can be achieved, thereby improving the convenience of audio format conversion and expanding the usage scenarios of the device.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to illustrate the technical solutions of the present application.

[0017] Figure 1 This is a circuit diagram of an embodiment of the audio conversion device of the present application;

[0018] Figure 2 This is a circuit diagram of an embodiment of the power module of the present application. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0020] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0021] The term "and / or" in this article is simply a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0022] See also Figure 1 , Figure 1 This is a circuit diagram of an embodiment of an audio conversion device 100 of the present application. The audio conversion device 100 includes multiple audio interfaces 110, including an A2B signal interface 111 and at least two other signal interfaces. The A2B signal interface 111 is used to transmit A2B audio signals, and each other signal interface is used to transmit a different type of other audio signal. A control circuit 120 is provided. A signal conversion circuit 130 is connected to the control circuit 120 and each audio interface 110, and is configured to receive control signals from the control circuit to convert audio signals corresponding to the two audio interfaces.

[0023] In some embodiments, other signal interfaces include at least one of the following: an analog signal interface 112, a preset signal interface 113, a USB signal interface 114, and a Bluetooth signal interface 115; wherein, the analog signal interface 112 is used to transmit analog audio signals, the preset signal interface 113 is used to transmit SPDIF (Sony / Philips Digital Interface) audio signals or optical fiber audio signals, the USB signal interface 114 is used to transmit USB digital audio signals, and the Bluetooth signal interface 115 is used to transmit Bluetooth audio signals.

[0024] The signal conversion circuit 130 includes multiple conversion modules, each conversion module is connected to at least one audio interface, and different conversion modules are connected to different audio interfaces. The conversion module is used to convert between associated audio signals and audio signals in a preset format. The associated audio signal is the audio signal corresponding to the audio interface connected to the conversion module.

[0025] Specifically, the multiple conversion modules include an A2B conversion module 131 and at least one other conversion module, wherein the A2B conversion module 131 is connected to the A2B signal interface 111 and the control circuit 120, and is used to convert the first A2B audio signal input from the A2B signal interface 111 into a first digital audio signal in a preset format and then input it into the control circuit 120, or convert the second digital audio signal in a preset format output from the control circuit 120 into a second A2B audio signal and then output it through the A2B signal interface; each other conversion module is connected to at least one other signal interface and the control circuit 120, and is used to convert the first other audio signal input from the other signal interface to which it is connected into a third digital audio signal in a preset format and then input it into the control circuit 120, or convert the fourth digital audio signal in a preset format output from the control circuit 120 into a second other audio signal and then output it through the other signal interface to which it is connected.

[0026] For example, the audio signal in the preset format may be a TDM (Time Division Multiplexing) signal. After receiving the first A2B audio signal input from the A2B signal interface 111, the A2B conversion module 131 converts the first A2B audio signal into a first TDM signal and inputs the first TDM signal into the control circuit 120. Furthermore, the control circuit 120 may transmit a second TDM signal to the A2B conversion module 131. The A2B conversion module 131 converts the received second TDM signal into a second A2B audio signal and transmits the second A2B audio signal to the A2B signal interface 111 for transmission to other external devices via the A2B signal interface 111. Among them, the A2B conversion module 131 can use the AD2428 chip, which is a chip used for car audio transmission and has high-bandwidth bidirectional digital audio characteristics. This solution can achieve communication within a distance of up to 15 meters. It only needs to use a twisted pair to transmit I2S (Inter-IC Sound, integrated circuit built-in audio bus) / TDM / PDM (Pulse Density Modulation, pulse density modulation) data and I2C (Inter-Integrated Circuit, integrated circuit bus) control information as well as clock and power supply signals, which is very simple and convenient. It is understandable that the preset format audio signal can also be an FDM (Frequency Division Multiplexing, frequency division multiplexing) signal, etc., which is not specifically limited here.

[0027] When the other signal interface includes an analog signal interface 112, at least one other conversion module includes a digital-to-analog conversion module 132 connected to the analog signal interface 112. In this case, the digital-to-analog conversion module 132 and the control circuit 120 transmit signals in the following manner: after receiving a first analog audio signal from the analog signal interface 112, the digital-to-analog conversion module 132 converts the first analog audio signal into a first TDM signal and inputs the first TDM signal into the control circuit 120. Furthermore, the control circuit 120 may transmit a second TDM signal to the digital-to-analog conversion module 132. The digital-to-analog conversion module 132 converts the received second TDM signal into a second analog audio signal and transmits the second analog audio signal to the analog signal interface 112 for transmission to other external devices via the analog signal interface 112. The digital-to-analog conversion module 132 may utilize TI's PCM3168A, which has six analog differential inputs, eight analog differential outputs, and includes a 24-bit ADC (Analog to Digital Converter) and a DAC (Digital to Analog Converter).

[0028] When the other signal interface includes a USB signal interface 114, at least one other conversion module includes a USB conversion module 133 connected to the USB signal interface 114. In this case, the transmission method between the USB conversion module 133 and the control circuit 120 is as follows: after receiving the first USB digital audio signal input by the USB signal interface 114, the USB conversion module 133 converts the first USB digital audio signal into a first TDM signal, and inputs the first TDM signal into the control circuit 120. In addition, the control circuit 120 can transmit a second TDM signal to the USB conversion module 133. The USB conversion module 133 converts the received second TDM signal into a second USB digital audio signal, and transmits the second USB digital audio signal to the USB signal interface 114, which is then transmitted to other external devices via the USB signal interface 114. The USB conversion module 133 can use a chip that supports a TDM protocol interface. Common chips include XMOS's XU216-512-TQ128.

[0029] When the other signal interfaces include a Bluetooth signal interface 115, at least one other conversion module includes a Bluetooth conversion module 134 connected to the Bluetooth signal interface 115. In this case, the transmission method between the Bluetooth conversion module 134 and the control circuit 120 is as follows: after receiving the first Bluetooth audio signal input by the Bluetooth signal interface 115, the Bluetooth conversion module 134 converts the first Bluetooth audio signal into a first TDM signal and inputs the first TDM signal into the control circuit 120. In addition, the control circuit 120 can transmit a second TDM signal to the Bluetooth conversion module 134. The Bluetooth conversion module 134 converts the received second TDM signal into a second Bluetooth audio signal and transmits the second Bluetooth audio signal to the Bluetooth signal interface 115, which is then transmitted to other external devices via the Bluetooth signal interface 115. The Bluetooth conversion module 134 can use a chip that supports a TDM protocol interface. Common chips include XMOS's XU216-512-TQ128.

[0030] When the other signal interfaces include the preset signal interface 113, the preset signal interface 113 is directly connected to the control circuit 120. The preset signal interface 113 is an SPDIF signal interface or an optical fiber signal interface. In this case, the preset signal interface 113 can directly transmit the SPDIF audio signal or the optical fiber audio signal to the control circuit 120, and the control circuit 120 can also transmit the TDM signal to the preset signal interface 113.

[0031] Please continue reading Figure 1The control circuit 120 includes a digital signal processing circuit 121 and a controller 122 that are interconnected. The digital signal processing circuit 121 can perform processing such as adding or subtracting gain and providing sound effects on the received audio signal in a preset format. After the digital signal processing circuit 121 completes the processing, it can output the signal to a designated conversion module according to the instructions of the controller 122, and then output the signal through the corresponding signal interface. The digital signal processing circuit 121 can be a DSP (Digital Signal Processing) module. For example, the DSP module can use ADI's ADAU1452WBCPZ chip, which has 48 channels, 32-bit digital signal input / output, and can support an audio sampling rate of up to 192KHZ.

[0032] The controller 122 is used to coordinate and control the operation of the A2B conversion module 131, the digital-to-analog conversion module 132, the USB conversion module 133, and the Bluetooth conversion module 134, and can also control the initialization and operation of the digital signal processing circuit 121. The controller 122 can be an MCU (Microcontroller Unit) module. For example, the controller 122 is a product based on the ARM Cortex-M4F / M0 core, which communicates via I2C. The digital signal processing circuit 121 and the controller 122 can communicate via the SPI (Serial Peripheral Interface) protocol or other protocols, which are not specifically limited here.

[0033] In some embodiments, the A2B conversion module 131 is connected to the digital signal processing circuit 121 and the controller 122, and each other conversion module is connected to the digital signal processing circuit 121 and the controller 122. When the A2B conversion module 131 is connected to the digital signal processing circuit 121, the A2B conversion module 131 converts the first A2B audio signal received from the A2B signal interface 111 to obtain a first TDM signal, and inputs the first TDM signal to the digital signal processing circuit 121. After the digital signal processing circuit 121 processes the first TDM signal, it obtains a second TDM signal. At this time, the digital signal processing circuit 121 can send the second TDM signal to the A2B conversion module 131, and the A2B conversion module 131 converts the second TDM signal into a second A2B audio signal, and transmits it to other external devices through the A2B signal interface 111. Alternatively, the digital signal processing circuit 121 can send the second TDM signal to other conversion modules, which convert the second TDM signal into corresponding other audio signals and output them through other signal interfaces to which they are connected.

[0034] In the case where the other conversion modules include a digital-to-analog conversion module 132, when the digital-to-analog conversion module 132 is connected to the digital signal processing circuit 121, the digital-to-analog conversion module 132 converts the first analog audio signal received from the analog signal interface 112 to obtain a first TDM signal, and inputs the first TDM signal to the digital signal processing circuit 121. After the digital signal processing circuit 121 processes the first TDM signal, it will obtain a second TDM signal. At this time, the digital signal processing circuit 121 can send the second TDM signal to the digital-to-analog conversion module 132, and the digital-to-analog conversion module 132 converts the second TDM signal into a second analog audio signal, and transmits it to other external devices through the analog signal interface 112. Alternatively, the digital signal processing circuit 121 can send the second TDM signal to the A2B conversion module 131 or other conversion module, and the A2B conversion module 131 converts the second TDM signal into an A2B audio signal and outputs it through the A2B signal interface 111, or the other conversion module converts the second TDM signal into a corresponding other audio signal and outputs it through other signal interfaces to which it is connected.

[0035] In the case where the other conversion modules include a USB conversion module 133, when the USB conversion module 133 is connected to the digital signal processing circuit 121, the USB conversion module 133 converts the first USB digital audio signal received from the USB signal interface 114 to obtain a first TDM signal, and inputs the first TDM signal to the digital signal processing circuit 121. After the digital signal processing circuit 121 processes the first TDM signal, it will obtain a second TDM signal. At this time, the digital signal processing circuit 121 can send the second TDM signal to the USB conversion module 133, and the USB conversion module 133 converts the second TDM signal into a second USB digital audio signal, and transmits it to other external devices through the USB signal interface 114. Alternatively, the digital signal processing circuit 121 can send the second TDM signal to the A2B conversion module 131 or other conversion module, and the A2B conversion module 131 converts the second TDM signal into an A2B audio signal and outputs it through the A2B signal interface 111, or the other conversion module converts the second TDM signal into a corresponding other audio signal and outputs it through other signal interfaces to which it is connected.

[0036] In the case where the other conversion modules include a Bluetooth conversion module 134, when the Bluetooth conversion module 134 is connected to the digital signal processing circuit 121, the Bluetooth conversion module 134 obtains the first Bluetooth audio signal through the Bluetooth signal interface 115, and converts the received first Bluetooth audio signal to obtain a first TDM signal. The obtained first TDM signal is input into the digital signal processing circuit 121, and the digital signal processing circuit 121 processes the first TDM signal to obtain a second TDM signal. At this time, the digital signal processing circuit 121 can send the second TDM signal to the Bluetooth conversion module 134, and the Bluetooth conversion module 134 converts the second TDM signal into a second Bluetooth audio signal, and transmits it to other external devices through the Bluetooth signal interface 115. Alternatively, the digital signal processing circuit 121 can send the second TDM signal to the A2B conversion module 131 or other conversion module, and the A2B conversion module 131 converts the second TDM signal into an A2B audio signal and outputs it through the A2B signal interface 111, or other conversion modules convert the second TDM signal into corresponding other audio signals and output them through other signal interfaces connected thereto.

[0037] In the case that the other signal interfaces include the preset signal interface 113 , the preset signal interface 113 is directly connected to the digital signal processing circuit 121 . The preset signal interface 113 is an SPDIF signal interface or an optical fiber signal interface.

[0038] In a specific scenario, the audio conversion device 100 includes an A2B signal interface 111, an analog signal interface 112, a preset signal interface 113, a USB signal interface 114, a Bluetooth signal interface 115, an A2B conversion module 131, a digital-to-analog conversion module 132, a USB conversion module 133, a Bluetooth conversion module 134, a digital signal processing circuit 121, and a controller 122. When the audio conversion device 100 is in use, the controller 122 controls the digital signal processing circuit 121 to initialize. After the digital signal processing circuit 121 is initialized, the controller 122 controls the conversion module to start operating and controls which processing the digital signal processing circuit 121 performs on the received audio signal in the preset format.

[0039] For example, after the digital signal processing circuit 121 completes initialization, the controller 122 sends a control signal to the A2B conversion module 131. Upon receiving the control signal, the A2B conversion module 131 begins operation. The A2B conversion module 131 obtains the first A2B audio signal through the A2B signal interface 111 and converts the first A2B audio signal into a first TDM signal. The A2B conversion module 131 sends the first TDM signal to the digital signal processing circuit 121. The controller 122 sends a control signal to the digital signal processing circuit 121 to instruct it to perform gain reduction processing on the first TDM signal. After receiving the first TDM signal, the digital signal processing circuit 121 performs gain reduction processing on the first TDM signal according to the control signal to obtain a second TDM signal. Simultaneously, the controller 122 sends control signals to the digital-to-analog conversion module 132 and the USB conversion module 133 to notify them to begin operation. Digital signal processing circuit 121 simultaneously sends the second TDM signal to digital-to-analog conversion module 132 and USB conversion module 133 to notify them. After receiving the second TDM signal, digital-to-analog conversion module 132 converts the second TDM signal into an analog audio signal and outputs it through analog signal interface 112. After receiving the second TDM signal, USB conversion module 133 converts the second TDM signal into a USB audio signal and outputs it through USB signal interface 114.

[0040] It is understandable that the digital signal processing circuit 121 sends the output audio signal in a preset format to one or more conversion modules, which is not specifically limited here.

[0041] Please continue reading Figure 1 The audio conversion device 100 also includes a power input interface 160 and a power module 150 connected to each other. The power module 150 is connected to the signal conversion circuit 130 and the control circuit 120 respectively, and is used to use the external power supply connected to the power input interface 160 to power the signal conversion circuit 130 and the control circuit 120.

[0042] In some embodiments, other signal interfaces include an analog signal interface 112, a preset signal interface 113, a USB signal interface 114, and a Bluetooth signal interface 115. The preset signal interface 113 is an SPDIF signal interface or an optical fiber signal interface. The signal conversion circuit 130 includes an A2B conversion module 131 connected to the A2B signal interface 111, a digital-to-analog conversion module 132 connected to the analog signal interface 112, a USB conversion module 133 connected to the USB signal interface 114, and a Bluetooth conversion module 134 connected to the Bluetooth signal interface 115. The signal conversion circuit 130 also provides power to the A2B conversion module 131, the digital-to-analog conversion module 132, the USB conversion module 133, the Bluetooth conversion module 134, the digital signal processing circuit 121, and the controller 122.

[0043] Furthermore, the power module 150 includes a plurality of voltage regulating units, each of which is configured to output a different input voltage.

[0044] Please refer to Figure 2 The multiple voltage regulating units include a first voltage stabilizing unit 151, a first buck-boost unit 152 and a second buck-boost unit 153. The input end of the first voltage stabilizing unit 151 is connected to the external power supply, and the output end of the first voltage stabilizing unit 151 is connected to the A2B conversion module 131; the input end of the first buck-boost unit 152 is connected to the external power supply, and the output end of the first buck-boost unit 152 is connected to the digital-to-analog conversion module 132; the input end of the second buck-boost unit 153 is connected to the external power supply, and the output end of the second buck-boost unit 153 is respectively connected to the USB conversion module 133, the Bluetooth conversion module 134 and the control circuit 120.

[0045] Specifically, the control circuit 120 includes a digital signal processing circuit 121 and a controller 122 that are connected to each other, and the output end of the second buck-boost unit 153 is connected to the digital signal processing circuit 121 and the controller 122 respectively.

[0046] For example, the first voltage stabilizing unit 151 converts the external power supply to 8.5V and supplies power to the A2B conversion module 131; the first buck-boost unit 152 converts the external power supply to 5.0V and supplies power to the digital-to-analog conversion module 132; the second buck-boost unit 153 converts the external power supply to 3.3V and supplies power to the USB conversion module 133, the Bluetooth conversion module 134, the digital signal processing circuit 121 and the controller 122.

[0047] In addition, to ensure stable operation of the core area of ​​the digital signal processing circuit 121, the core area of ​​the digital signal processing circuit 121 is not connected to a high-voltage power supply. Therefore, the auxiliary area of ​​the digital signal processing circuit 121 can be connected to the second buck-boost unit 153 for power supply, while the core area is connected to a low power supply voltage. Therefore, the multiple voltage regulation units also include a second voltage stabilizing unit 154, the input end of the second voltage stabilizing unit 154 is connected to the output end of the second buck-boost unit 153, and the output end of the second voltage stabilizing unit 154 is connected to the digital signal processing circuit 121. For example, the second voltage stabilizing unit 154 converts the 3.3V voltage output by the second buck-boost unit 153 into 1.0V to power the digital signal processing circuit 121.

[0048] The voltage stabilizing unit may be a low-dropout regulator (LDO) chip, and the buck-boost unit may be a BUCK (DC-CD buck converter) chip.

[0049] In another embodiment, the input end of the second voltage stabilizing unit 154 can be connected to the output end of the first buck-boost unit 152. Compared with the connection to the second buck-boost unit 153, the pressure difference between the second voltage stabilizing unit 154 and the first buck-boost unit 152 is larger, which will cause the second voltage stabilizing unit 154 to heat up more seriously.

Claims

1. An audio conversion device, characterized in that: include: Multiple audio interfaces, the multiple audio interfaces including an A2B signal interface and at least two other signal interfaces, the A2B signal interface being used to transmit an A2B audio signal, and each of the other signal interfaces being used to transmit a different type of other audio signal; control circuit; The signal conversion circuit is connected to the control circuit and each of the audio interfaces respectively, and is used to receive the control signal of the control circuit to realize the conversion between the audio signals corresponding to the two audio interfaces.

2. The device according to claim 1, characterized in that The other signal interfaces include at least one of the following: an analog signal interface, a preset signal interface, a USB signal interface, and a Bluetooth signal interface; Among them, the analog signal interface is used to transmit analog audio signals; the preset signal interface is used to transmit SPDIF audio signals or optical fiber audio signals; the USB signal interface is used to transmit USB digital audio signals; and the Bluetooth signal interface is used to transmit Bluetooth audio signals.

3. The device according to claim 1, characterized in that The signal conversion circuit includes multiple conversion modules, each of which is connected to at least one of the audio interfaces, and different conversion modules are connected to different audio interfaces. The conversion modules are used to convert between associated audio signals and audio signals in a preset format, and the associated audio signals are audio signals corresponding to the audio interfaces to which the conversion modules are connected.

4. The device according to claim 3, characterized in that The plurality of conversion modules include an A2B conversion module and at least one other conversion module; The A2B conversion module is connected to the A2B signal interface and the control circuit, and is configured to convert a first A2B audio signal input from the A2B signal interface into a first digital audio signal in a preset format and then input the first digital audio signal into the control circuit, or convert a second digital audio signal in a preset format output from the control circuit into a second A2B audio signal and then output the second digital audio signal through the A2B signal interface. Each of the other conversion modules is connected to at least one of the other signal interfaces and the control circuit, and is used to convert a first other audio signal input by the other signal interface to which it is connected into a third digital audio signal in a preset format and then input it into the control circuit, or to convert a fourth digital audio signal in a preset format output by the control circuit into a second other audio signal and then output it through the other signal interface to which it is connected.

5. The device according to claim 4, characterized in that The other signal interfaces include at least one of the following: an analog signal interface, a preset signal interface, a USB signal interface, and a Bluetooth signal interface; Among them, when the other signal interface includes an analog signal interface, the at least one other conversion module includes a digital-to-analog conversion module connected to the analog signal interface; when the other signal interface includes a USB signal interface, the at least one other conversion module includes a USB conversion module connected to the USB signal interface; when the other signal interface includes a Bluetooth signal interface, the at least one other conversion module includes a Bluetooth conversion module connected to the Bluetooth signal interface; when the other signal interface includes a preset signal interface, the preset signal interface is directly connected to the control circuit, and the preset signal interface is an SPDIF signal interface or an optical fiber signal interface.

6. The device according to claim 4, characterized in that The control circuit includes a digital signal processing circuit and a controller connected to each other; wherein, The A2B conversion module is connected to the digital signal processing circuit and the controller, and each of the other conversion modules is connected to the digital signal processing circuit and the controller; and / or, when the other signal interface includes a preset signal interface, the preset signal interface is directly connected to the digital signal processing circuit, and the preset signal interface is an SPDIF signal interface or an optical fiber signal interface.

7. The device according to claim 1, characterized in that The audio conversion device also includes a power input interface and a power module connected to each other, and the power module is respectively connected to the signal conversion circuit and the control circuit, and is used to use the external power supply connected to the power input interface to power the signal conversion circuit and the control circuit.

8. The device according to claim 7, characterized in that The power module includes a plurality of voltage regulating units, each of which is used to output a different input voltage.

9. The device according to claim 8, characterized in that The other signal interfaces include an analog signal interface, a preset signal interface, a USB signal interface, and a Bluetooth signal interface, wherein the preset signal interface is an SPDIF signal interface or an optical fiber signal interface, and the signal conversion circuit includes an A2B conversion module connected to the A2B signal interface, a digital-to-analog conversion module connected to the analog signal interface, a USB conversion module connected to the USB signal interface, and a Bluetooth conversion module connected to the Bluetooth signal interface; The plurality of voltage regulating units include a first voltage stabilizing unit, a first buck-boost unit, and a second buck-boost unit, wherein the input end of the first voltage stabilizing unit is connected to the external power supply, and the output end of the first voltage stabilizing unit is connected to the A2B conversion module; The input end of the first buck-boost unit is connected to the external power supply, and the output end of the first buck-boost unit is connected to the digital-to-analog conversion module; The input end of the second buck-boost unit is connected to the external power supply, and the output end of the second buck-boost unit is connected to the USB conversion module, the Bluetooth conversion module, and the control circuit respectively.

10. The device according to claim 9, characterized in that The control circuit includes a digital signal processing circuit and a controller connected to each other, and the output end of the second buck-boost unit is connected to the digital signal processing circuit and the controller respectively; And / or, the control circuit includes a digital signal processing circuit, and the multiple voltage regulating units also include a second voltage stabilizing unit, the input end of the second voltage stabilizing unit is connected to the output end of the second buck-boost unit, and the output end of the second voltage stabilizing unit is connected to the digital signal processing circuit.

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