CN218497485U - Audio conversion device - Google Patents
Audio conversion device Download PDFInfo
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- CN218497485U CN218497485U CN202222765884.2U CN202222765884U CN218497485U CN 218497485 U CN218497485 U CN 218497485U CN 202222765884 U CN202222765884 U CN 202222765884U CN 218497485 U CN218497485 U CN 218497485U
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Abstract
The utility model discloses an audio conversion device, which comprises a digital signal processing module, an automobile audio bus conversion module and a universal serial bus conversion module; the universal serial bus conversion module is respectively connected with the universal serial bus communication interface and the digital signal processing module, the universal serial bus communication interface is a bidirectional interface, and bidirectional signal transmission is performed between the universal serial bus conversion module and the digital signal processing module; the automobile audio bus conversion module is respectively connected with the automobile audio bus communication interface and the digital signal processing module, the automobile audio bus communication interface is a bidirectional interface, and bidirectional signal transmission is performed between the automobile audio bus conversion module and the digital signal processing module. The utility model discloses an increase USB conversion module and USB interface in audio frequency conversion device, make its function can expand, strengthened audio signal processing's flexibility greatly.
Description
Technical Field
The utility model relates to an audio processing technology field especially relates to an audio conversion device.
Background
At present, with the popularization of vehicle-mounted audio power amplifiers (hereinafter referred to as "vehicle-mounted power amplifiers") in the market, more and more automobiles are equipped with vehicle-mounted power amplifier products. The application of the automobile Audio Bus (A2B) technology in the vehicle-mounted power amplifier has a very wide scene. A2B is a high bandwidth, bi-directional, digital audio bus developed by ADI design. The A2B supports 11 nodes (1 main node and 10 slave nodes), only one double-wire UTP (unshielded twisted pair) cable is needed to transmit control information, audio, clock data and voltage, the distance between the nodes is 15 meters at the longest, and the length of the whole daisy chain is 40 meters. The A2B helps the vehicle to solve the problem of digital audio, and the A2B bus can be connected with audio equipment in the vehicle, such as MIC, vehicle-mounted power amplifier, multimedia host, T-BOX and the like. Therefore, in the vehicle infotainment system, the A2B bus plays a very critical role.
The existing A2B conversion equipment can process A2B audio signals and some common audio signals, but the existing A2B conversion equipment has insufficient function expansibility, cannot realize the conversion of audio formats which the existing A2B conversion equipment does not have, cannot realize the functions of recording, capturing and the like of audio, and is not beneficial to the development of the work of debugging, analyzing, researching and developing and the like of vehicle-mounted power amplifier products and audio products.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model aims at providing an audio conversion device, through increase USB conversion module and USB interface in audio conversion device, utilize external equipment to realize functions such as the conversion of audio format, the conversion of audio frequency, record, snatch, debugging to convert the USB audio signal of external input into the inside required audio signal of audio conversion device through USB conversion module, make its function expand, strengthened audio signal processing's flexibility greatly.
The utility model adopts the technical scheme as follows:
the utility model provides an audio conversion device, which comprises a digital signal processing module, an automobile audio bus conversion module and a universal serial bus conversion module;
the universal serial bus conversion module is respectively connected with the universal serial bus communication interface and the digital signal processing module, the universal serial bus communication interface is a bidirectional interface, and bidirectional signal transmission is performed between the universal serial bus conversion module and the digital signal processing module;
the automobile audio bus conversion module is respectively connected with the automobile audio bus communication interface and the digital signal processing module, the automobile audio bus communication interface is a bidirectional interface, and bidirectional signal transmission is performed between the automobile audio bus conversion module and the digital signal processing module.
In one possible implementation manner, the audio conversion device further comprises a control unit, the control unit is communicated with the automobile audio bus conversion module and the universal serial bus conversion module through two-wire serial buses respectively, and the control unit is communicated with the digital signal processing module through a serial peripheral interface communication protocol.
In one possible implementation manner, the audio conversion apparatus further includes a digital-to-analog conversion module, the digital-to-analog conversion module is connected to the analog signal communication interface and the digital signal processing module, the digital-to-analog conversion module and the digital signal processing module perform bidirectional signal transmission therebetween, and the analog signal communication interface is a bidirectional interface.
In one possible implementation, the control unit communicates with the digital-to-analog conversion module via a two-wire serial bus.
In one possible implementation manner, the audio conversion apparatus further includes a sony philips digital interface or an optical fiber interface, and the sony philips digital interface or the optical fiber interface is connected to the digital signal processing module, and the two interfaces perform bidirectional signal transmission.
In one possible implementation manner, the audio conversion device further includes a power module, the power module includes a first low dropout linear voltage stabilization chip, an input end of the first low dropout linear voltage stabilization chip is connected with an external power supply through a power input interface, and an output end of the first low dropout linear voltage stabilization chip is connected with the car audio bus conversion module.
In one possible implementation manner, the power module further includes a first voltage-reduction conversion chip, an input end of the first voltage-reduction conversion chip is connected with an external power supply through a power input interface, and an output end of the first voltage-reduction conversion chip is connected with the digital-to-analog conversion module.
In one possible implementation manner, the power module further includes a second step-down conversion chip, an input end of the second step-down conversion chip is connected with the external power supply through a power input interface, and a first output end and a second output end of the second step-down conversion chip are respectively connected with the digital signal processing module and the control unit.
In one possible implementation manner, the power module further includes a second low dropout linear regulator chip, an input end of the second low dropout linear regulator chip is connected with a third output end of the second buck conversion chip, and an output end of the second low dropout linear regulator chip is connected with the universal serial bus conversion module.
In one possible implementation manner, time division multiplexing signals are respectively transmitted between the digital signal processing module and the universal serial bus conversion module, between the digital signal processing module and the automobile audio bus conversion module, and between the digital signal processing module and the digital-to-analog conversion module.
The utility model discloses an idea lies in, through increasing USB conversion module and USB interface in audio conversion device, utilizes external equipment (for example computer, mobile terminal etc.) to realize the conversion of audio format, the record of audio frequency, snatchs, functions such as debugging to convert external input's USB audio signal to the inside required audio signal of audio conversion device through USB conversion module, make its function can expand, strengthened audio signal processing's flexibility greatly.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of a framework of an embodiment of an audio conversion apparatus provided by the present invention;
fig. 2 is a schematic diagram of a frame of an embodiment of a power module provided by the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
The utility model discloses a conceive of and lie in, through increasing USB conversion module and USB interface in audio frequency conversion device, utilize external equipment (for example computer, mobile terminal etc.) to realize the conversion of audio format, the record of audio frequency, snatch, function such as debugging to convert the USB audio signal of external input to the inside required audio signal of audio frequency conversion device through USB conversion module, make its function can expand, strengthened audio signal processing's flexibility greatly.
In view of the foregoing core concept, the present invention provides an embodiment of at least one audio conversion apparatus, as shown in fig. 1, which may include a Digital Signal Processing (DSP) module 50, an automobile audio Bus (A2B) conversion module 10, and a Universal Serial Bus (USB) conversion module 20.
The DSP module 50 receives the audio signals transmitted by the A2B conversion module 10, the USB conversion module 20, and the digital-to-analog conversion module 40 (please refer to the following description), and the DSP module 50 processes the audio signals, including adding or subtracting gain to the audio signals, and providing sound effects.
In one possible implementation, the DSP module 50 employs an ADAU1452WBCPZ chip developed by ADI, which has 48 channels, 32bit digital signal input/output, and can support an audio sampling rate of up to 192 KHZ.
In one possible implementation, the DSP module 50 transmits signals (i.e., TDM signals) to other modules in a Time-Division Multiplexing (TDM) format.
It will be appreciated that other types of signals may be communicated between the DSP module 50 and other modules.
The following description will take the example of the TDM signal transmission between the DSP module 50 and other modules.
As shown in fig. 1, the USB conversion module 20 is connected to a Universal Serial Bus (USB) communication interface D and the DSP module 50, respectively, where the USB communication interface D is a bidirectional interface, and bidirectional signal transmission is performed between the USB conversion module 20 and the DSP module 50.
The USB conversion module 20 performs conversion between the TDM signal and the USB digital signal. The USB conversion module 20 receives a USB digital signal from an external device through the USB communication interface D, converts the USB digital signal into a TDM signal, and transmits the TDM signal to the DSP module 50 for audio processing (e.g., sound processing). The USB conversion module 20 may receive the audio processed by the DSP module 50 and output the audio through the USB communication interface D.
The USB conversion module 20 can also be connected to an external device such as a computer or a mobile terminal through the USB communication interface D, and the external device can complete the recording, capturing, processing, and converting of the audio format of the audio signal. The audio signal can also be converted into an audio format that cannot be realized inside the audio conversion device by an external device, input into the audio conversion device through the USB communication interface D, and output after being processed by the DSP module 50. In addition, the work of debugging, analyzing, researching and developing and the like of the vehicle-mounted power amplifier product and the audio product can be realized through the connection of the USB communication interface D and the external equipment, great convenience is provided for the maintenance of the audio conversion device, the working efficiency is greatly improved, and the equipment and the working cost are saved.
In one possible implementation, the USB conversion module 20 uses a chip supporting TDM protocol interface, which is commonly used as XU216-512-TQ128 of XMOS. The USB conversion module 20 and the DSP module 50 perform bidirectional transmission of TDM signals.
As shown in fig. 1, the A2B conversion module 10 is connected to a car audio bus (A2B) communication interface C and the DSP module 50, respectively, where the A2B communication interface C is a bidirectional interface, and bidirectional signal transmission is performed between the A2B conversion module 10 and the DSP module 50.
The A2B conversion module 10 performs audio transmission with the upper and lower devices through the A2B communication interface C, and the A2B conversion module 10 performs interconversion between the A2B audio signal and the TDM signal. The A2B conversion module 10 receives an audio signal of a car audio bus (A2B) from outside through the A2B communication interface C, converts the audio signal into a TDM signal, and transmits the TDM signal to the DSP module 50 for processing (e.g., sound processing). The A2B conversion module 10 receives the processed TDM signal from the DSP module 50, converts the TDM signal into an A2B signal, and outputs the A2B signal through the A2B communication interface C.
In one possible implementation, the A2B conversion module 10 employs an AD2428 chip developed by ADI corporation, which is a chip used for car audio transmission and has high-bandwidth bidirectional digital audio characteristics. The communication can be realized within a distance of 15 meters, only one twisted pair is needed to transmit I2S/TDM/PDM data, I2C control information, clock and power supply signals, and the communication is very simple and convenient.
In a possible implementation, the audio conversion apparatus further includes a digital-to-analog conversion module 40. As shown in fig. 1, the digital-to-analog conversion module 40 is connected to the analog signal communication interface a and the DSP module 50, respectively, and the digital-to-analog conversion module 40 transmits bidirectional signals to the DSP module 50, where the analog signal communication interface is a bidirectional interface.
The external analog signal is communicated with the digital-to-analog conversion module 40 via the analog signal communication interface a, converted into a TDM signal by the digital-to-analog conversion module 40, and transmitted to the DSP module 50 for audio processing. The DSP module 50 transmits the processed audio signal to the digital-to-analog conversion module 40, and the digital-to-analog conversion module 40 outputs the processed audio signal through the analog signal communication interface a.
In one possible implementation, the digital-to-analog conversion module 40 is PCM3168A of TI, and has 6 analog differential inputs and 8-channel analog differential outputs, including a 24-bit adc and a DAC.
In a possible implementation manner, the audio conversion apparatus further includes a Sony Philips Digital Interface (SPDIF) Interface or a fiber Interface B. As shown in fig. 1, the SPDIF/fiber interface B is connected to the DSP50 module, and performs bidirectional sony philips digital signal (SPDIF signal) transmission.
In a possible implementation, the audio conversion device further comprises a control unit 60. As shown in fig. 1, the control unit 60 communicates with the A2B conversion module 10, the USB conversion module 20, and the digital-to-analog conversion module 40 through a two-wire Serial bus (I2C), and the control unit 60 communicates with the DSP module through a Serial Peripheral Interface (SPI) communication protocol. After the audio is processed, the DSP module 50 outputs the audio signal in the TDM format to a designated module (for example, the A2B conversion module 10, the USB conversion module 20, or the digital-to-analog conversion module 40) according to a control instruction of the control unit 60, and outputs the audio signal through a corresponding communication interface.
In a possible implementation manner, the control Unit 60 is a vehicle-mounted Microcontroller (MCU), the MCU is a product based on an ARM Cortex-M4F/M0 core, and coordinates and controls operations of the A2B conversion module 10, the USB conversion module 20, and the digital-to-analog conversion module 40 through I2C (Inter-Integrated Circuit) communication, and communicates with the DSP module 50 through an SPI protocol, so as to initialize and normally operate the DSP module 50.
Therefore, the audio signals input into the DSP module 50 by the A2B conversion module 10, the USB conversion module 20, the digital-to-analog conversion module 40, and the SPDIF/optical fiber interface B can be finally output as TDM signals through the DSP module, and sent to the interface having the same or different source as the audio signals according to the control instruction of the control unit for output, thereby implementing the inter-conversion of the audios with different formats in the audio conversion apparatus.
It should be noted that the technical implementation of the control of the A2B conversion module 10, the USB conversion module 20, the digital-to-analog conversion module 40, and the DSP module 50 by the control unit 60 belongs to the prior art.
In a possible implementation manner, the audio conversion apparatus further includes a power module 30, and the power module 30 is connected to the positive electrode + and the negative electrode (ground) of the external power source through the power input interface E. The power module 30 is used for providing power of each stage to the inside of the audio conversion device.
In one possible implementation, as shown in fig. 2, the power module 30 includes a first Low Dropout linear Regulator (LDO) chip 301, a first BUCK conversion (BUCK) chip 302, a second BUCK chip 303, and a second LDO chip 304.
The input end of the first LDO chip 301 is connected to the external power supply BAT through the power input interface E, and the output end of the first LDO chip 301 is connected to the A2B conversion module 10.
In one possible implementation, the first LDO chip 301 is configured to convert an external power into 8.5V, and output the V to the A2B conversion module 10.
The input end of the first BUCK chip 302 is connected to the external power supply BAT through the power input interface E, and the output end of the first BUCK chip is connected to the digital-to-analog conversion module 40.
In a possible implementation manner, the first BUCK chip is configured to convert the external power into 5.0V, and provide the converted voltage to the digital-to-analog conversion module 40.
The input end of the second BUCK chip 303 is connected with an external power supply BAT through a power input interface E, and the first output end and the second output end of the second BUCK chip 303 are respectively connected with the DSP module 50 and the control unit 60.
In one possible implementation, the second BUCK chip is used to convert the external power into 3.3V, which is provided to the DSP module 50 and the control unit 60.
An input end of the second LDO chip 304 is connected to a third output end of the second BUCK chip 303, and an output end of the second LDO chip 304 is connected to the USB conversion module 20.
In a possible implementation manner, the first LDO chip 301 selects a chip with a model of MPQ2029GN, the first BUCK chip 302 selects a chip with a model of MPQ4423AGQ, the second BUCK chip 303 selects a chip with a model of MPQ4423AGQ, and the second LDO chip 304 selects a chip with a model of MPQ20051 DQ.
In one possible implementation, the second LDO chip 304 is used to convert 3.3V into 1.0V, which is output to the USB conversion module 20.
The utility model discloses can realize A2B signal, analog signal, SPDIF/fiber signal, the mutual conversion between two arbitrary signals in the USB digital signal, USB conversion module and USB communication interface's the conversion of other form audio frequencies of setting up convenience, utilize external equipment to realize the development of work such as snatching of audio frequency, multiple functions such as debugging, processing and on-vehicle power amplifier product, the debugging of audio frequency product, analysis, research and development, have abundant scalability, work efficiency has been promoted greatly. And, the utility model discloses can realize the conversion of appointed audio format under the control of the control unit, simplify the loaded down with trivial details degree of software, improve user's experience.
In the embodiments of the present invention, "at least one" means one or more, "and" a plurality "means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
In addition, the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other. The above-described embodiments of devices, apparatuses, etc. are merely illustrative, and modules, units, etc. described as separate components may or may not be physically separate, and may be located in one place or distributed in multiple places, for example, on nodes of a system network. Some or all of the modules and units can be selected according to actual needs to achieve the purpose of the above-mentioned embodiment. Can be understood and carried out by those skilled in the art without inventive effort.
The structure, features and effects of the present invention have been described in detail in the above embodiments shown in the drawings, but the above embodiments are only preferred embodiments of the present invention, and it should be noted that the technical features related to the above embodiments and their preferred modes can be reasonably combined and assembled into various equivalent schemes by those skilled in the art without departing from or changing the design idea and technical effects of the present invention; therefore, the present invention is not limited to the embodiments shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to equivalent changes are within the scope of the present invention without departing from the spirit of the present invention.
Claims (10)
1. An audio conversion device is characterized by comprising a digital signal processing module, an automobile audio bus conversion module and a universal serial bus conversion module;
the universal serial bus conversion module is respectively connected with a universal serial bus communication interface and the digital signal processing module, the universal serial bus communication interface is a bidirectional interface, and bidirectional signal transmission is performed between the universal serial bus conversion module and the digital signal processing module;
the automobile audio bus conversion module is respectively connected with an automobile audio bus communication interface and the digital signal processing module, the automobile audio bus communication interface is a bidirectional interface, and bidirectional signal transmission is performed between the automobile audio bus conversion module and the digital signal processing module.
2. The audio conversion device according to claim 1, further comprising a control unit, wherein the control unit communicates with the car audio bus conversion module and the universal serial bus conversion module via two-wire serial buses, respectively, and communicates with the digital signal processing module via a serial peripheral interface communication protocol.
3. The audio conversion device according to claim 2, further comprising a digital-to-analog conversion module, wherein the digital-to-analog conversion module is respectively connected to an analog signal communication interface and the digital signal processing module, the digital-to-analog conversion module and the digital signal processing module perform bidirectional signal transmission therebetween, and the analog signal communication interface is a bidirectional interface.
4. The audio conversion device of claim 3, wherein the control unit communicates with the digital-to-analog conversion module via a two-wire serial bus.
5. The audio conversion device of claim 1 or 3, further comprising a Sony Philips digital interface or an optical fiber interface, wherein the Sony Philips digital interface or the optical fiber interface is connected to the digital signal processing module, and both are configured for bidirectional signal transmission.
6. The audio conversion device according to claim 3, further comprising a power module, wherein the power module includes a first low dropout linear regulator chip, an input terminal of the first low dropout linear regulator chip is connected to an external power source through a power input interface, and an output terminal of the first low dropout linear regulator chip is connected to the car audio bus conversion module.
7. The audio conversion device according to claim 6, wherein the power module further comprises a first buck conversion chip, an input end of the first buck conversion chip is connected to an external power source through the power input interface, and an output end of the first buck conversion chip is connected to the digital-to-analog conversion module.
8. The audio conversion device according to claim 7, wherein the power module further comprises a second buck conversion chip, an input end of the second buck conversion chip is connected to an external power source through the power input interface, and a first output end and a second output end of the second buck conversion chip are respectively connected to the digital signal processing module and the control unit.
9. The audio conversion apparatus according to claim 8, wherein the power module further comprises a second low dropout regulator chip, an input terminal of the second low dropout regulator chip is connected to the third output terminal of the second buck conversion chip, and an output terminal of the second low dropout regulator chip is connected to the usb conversion module.
10. The audio conversion device according to claim 3, wherein time division multiplexing signals are respectively transmitted between the digital signal processing module and the USB conversion module, the car audio bus conversion module, and the D/A conversion module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222765884.2U CN218497485U (en) | 2022-10-18 | 2022-10-18 | Audio conversion device |
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| CN202222765884.2U CN218497485U (en) | 2022-10-18 | 2022-10-18 | Audio conversion device |
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| CN218497485U true CN218497485U (en) | 2023-02-17 |
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| CN202222765884.2U Active CN218497485U (en) | 2022-10-18 | 2022-10-18 | Audio conversion device |
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