CN211089940U

CN211089940U - Lossless playing system based on automobile digital tuning power amplifier

Info

Publication number: CN211089940U
Application number: CN202020458699.7U
Authority: CN
Inventors: 伍明武
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-07-24
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses a based on harmless play system of car digital tuning power amplifier, including main MCU control module, main MCU control module is connected with DSP digital audio processing module through first I2S communication interface, the digital audio processing module receiving terminal is connected with bluetooth digital audio module's input, the digital audio processing module receiving terminal is connected with the output of harmless player through second I2S communication interface. The utility model discloses in, through butt joint through with harmless player and digital audio processing module interface, make tone quality can reach zero loss, portable hand controller can realize reading the setting of systems such as catalogue, song switching, digital tuning simultaneously, it is more convenient to use to and can carry out blind operation in driving, because of hand controller, harmless player, digital audio processing module all the autonomous working, carry out communication control through main MCU control module, various digital audio system of regulation and control that can be quick.

Description

Lossless playing system based on automobile digital tuning power amplifier

Technical Field

The utility model relates to a car audio technical field specifically is based on harmless playback system of car digital tuning power amplifier.

Background

With the improvement of living standard, automobiles have already comprehensively entered the lives of people, and with the improvement of science and technology, automobiles have the function of riding instead of walking, the comfort of riding is the point that most automobile purchasing families are interested nowadays, and the sound effect is also the point of attaching importance.

At present, vehicle-mounted digital tuning systems on the market can only compensate automobile space, and equipment cannot compensate damaged parts brought by sound sources due to the influence on sound fields, so that the digital tuning systems cannot achieve the best listening experience.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a based on car digital tuning power amplifier harmless playback system to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

based on car digital tuning power amplifier harmless play system, including main MCU control module, main MCU control module is connected with DSP digital audio processing module through first I2S communication interface, the digital audio processing module receiving terminal is connected with bluetooth digital audio module's input, the digital audio processing module receiving terminal is connected with the output of harmless player through second I2S communication interface.

The main MCU control module comprises a first USB interface in data connection with the PC host, a first serial port with the baud rate of 57600 and a second serial port which is connected with the lossless player and has the baud rate of 57600.

The DSP digital audio processing module comprises an ADC module for analog-to-digital conversion, a DAC module for converting analog signals into digital signals and at least two DSP chips.

The Bluetooth digital audio module is integrated with a functional module in the lossless player, and the integrated module formed by the Bluetooth digital audio module and the functional module in the lossless player comprises a third I2S communication interface for receiving digital audio signals, a UART serial port for operating with the outside and a second USB interface.

The master MCU control module is connected with the hand controller through a first serial port.

The hand controller comprises an encoder and a color screen for realizing man-machine interaction.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses in, through butt joint harmless player and digital audio processing module interface, make tone quality can reach zero loss, portable hand controller can realize reading the setting of systems such as catalogue, song switching, digital tuning simultaneously, and it is more convenient to use to and can carry out blind operation in driving, because of hand controller, harmless player, digital audio processing module all the autonomous working, carry out communication control through main MCU control module, various digital audio system of regulation and control that can be quick.

Drawings

Fig. 1 is a schematic block diagram of a structure of a lossless playing system based on an automobile digital tuning power amplifier.

In the figure: 1. a main MCU control module; 101. a first USB interface; 102. a first serial port; 103. a second serial port; 2. a first I2S communication interface; 3. a digital audio processing module; 301. an ADC module; 302. a DAC module; 303. a DSP chip; 4. a Bluetooth digital audio module; 5. a second I2S communication interface; 6. a lossless player; 7. a third I2S communication interface; 8. a UART serial port; 9. a second USB interface; 10. a hand controller; 1001. an encoder; 1002. and (5) color screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution:

based on car digital tuning power amplifier harmless play system, including main MCU control module 1, main MCU control module 1 is connected with DSP digital audio processing module 3 through first I2S communication interface 2, and digital audio processing module 3 receiving terminal is connected with bluetooth digital audio module 4's input, and digital audio processing module 3 receiving terminal is connected with the output of harmless player 6 through second I2S communication interface 5.

Regard as the data transfer center of this system with main MCU control module 1 (can adopt model STM32F103C8T6), be responsible for data processing, and accomplish the uploading of data and assign and control external equipment work, data carry out the storage operation of data through data storage chip (can adopt model AT24C256) in the operation storage process, the data that all system work produced all are preserved in data storage chip, first USB interface 101 on the main MCU control module 1 can directly receive the PC end and carry out data connection, main MCU control module 1 can reset the USB concentrator of pulling up the PC end in the during operation, let the PC end can directly discern to be USBHID.

The hand controller 10 is mainly responsible for externally controlling the DSP system, performing human-computer interaction through the user interface of the color screen 1002, and then converting the motion signal into a recognizable data signal through the encoder 1001 to implement the usual physical operation of the client, where the word stock stored in the color screen 1002 and the required picture resource are stored through the corresponding RAM, and the data displayed at ordinary times is stored in the position where the resource is stored through the internal algorithm, and then directly printed on the color screen 1002 after being extracted.

The bluetooth digital audio module 4 is integrated with a functional module inside the lossless player 6, and is used for receiving bluetooth audio of a mobile terminal (such as a mobile phone), lossless playing of a U disk and transparent transmission of mobile phone transmission. The module integrating the bluetooth digital audio module 4 and the internal functional module of the lossless player 6 can perform data interaction with at least two DSP chips 303 through the third I2S interface 7, so as to make the system sound.

The DSP digital audio processing module 3 performs acoustic processing on received analog signals and digital signals, such as an EQ engine, a delayed acoustic algorithm, phase, high-cut low-cut processing, gain, audio mixing and frequency mixing processing, and then outputs the analog signals and the digital signals from an analog channel and a digital channel, the ADC module 301 performs analog-to-digital conversion, the DAC module 302 converts the analog signals into the digital signals, and the digital signals are amplified and output through a rear-stage power amplifier, the resource limitation of the traditional DSP digital audio processing module 3 cannot meet the general use situation, and the need of externally expanding a RAM exists, so that the system is additionally provided with two external RAM chips of the DSP chip 303 to form a large RAM system by combining, so as to meet the actual use situation, the ADC module 301 converts the external analog signals into the digital signals which can be identified by the DSP digital audio processing module 3 and supplies the digital signals to the DSP chip 303 for acoustic processing, and the DAC module 302 converts the digital signals output by the DSP into analog signals which can be identified by human The external amplification system is used for amplification, and the sound is produced from the loudspeaker.

The main MCU control module 1 comprises a first USB interface 101 in data connection with a PC host, a first serial port 102 with a baud rate of 57600 and a second serial port 103 which is connected with the lossless player 6 and has a baud rate of 57600, and the main MCU control module 1 is a data transfer station and data storage of the whole system, so that the control and data transmission are realized by connecting the first USB interface 101, the first serial port 102 and the second serial port 103 with other components.

The DSP digital audio processing module 3 comprises an ADC module 301 for analog-to-digital conversion, a DAC module 302 for converting analog signals into digital signals and at least two DSP chips 303, the system needs 4 analog-to-digital conversion and 6 analog-to-digital conversion, but the traditional magnetic flux only has 2 analog-to-digital conversion and 4 analog-to-digital conversion, so that one ADC module 301 needs to be added for analog-to-digital conversion, two extra analog signals are converted into digital signals which can be identified by the DSP chips 303, then the digital-to-analog conversion is carried out through one DAC module 302, the 2 extra analog signals are subjected to analog output through the DAC module 302, meanwhile, the resources of the DSP digital audio processing module 3 are limited, the requirements of customers cannot be met, and then the two DSP chips 303 are added for expansion of an internal RAM.

Wherein, bluetooth digital audio module 4 is integrated with the inside functional module of harmless player 6, and the integrated module that bluetooth digital audio module 4 constitutes with the inside functional module of harmless player 6 is including the third I2S communication interface 7 that is used for digital audio signal to receive, the UART serial ports 8 and the second USB interface 9 of operating with the outside, not only can reduce the space after integrating and occupy, and the inside of integrated module can switch with can through hand controller 10 simultaneously.

The master MCU control module 1 is connected with the hand controller 10 through the first serial port 102, and the hand controller 10 is used for better realizing human-computer interaction.

The hand controller 10 comprises an encoder 1001 and a color screen 1002, the encoder 1001 is used for realizing human-computer interaction, the main MCU control module 1 is mainly responsible for reading and converting data, the color screen 1002 is responsible for user interface interaction, and the encoder 1001 is used for user operation and is used for controlling and connecting subjective consciousness operation conversion data of a client with a main system.

The working principle is as follows:

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Based on car digital tuning power amplifier harmless playback system, including main MCU control module (1), its characterized in that: the main MCU control module (1) is connected with the DSP digital audio processing module (3) through a first I2S communication interface (2), the receiving end of the digital audio processing module (3) is connected with the input end of the Bluetooth digital audio module (4), and the receiving end of the digital audio processing module (3) is connected with the output end of the lossless player (6) through a second I2S communication interface (5).

2. The lossless playing system based on the automobile digital tuning power amplifier according to claim 1, characterized in that: the main MCU control module (1) comprises a first USB interface (101) which is in data connection with a PC host, a first serial port (102) with the baud rate of 57600 and a second serial port (103) which is connected with the lossless player (6) and has the baud rate of 57600.

3. The lossless playing system based on the automobile digital tuning power amplifier according to claim 1, characterized in that: the DSP digital audio processing module (3) comprises an ADC module (301) for analog-to-digital conversion, a DAC module (302) for converting analog signals into digital signals and at least two DSP chips (303).

4. The lossless playing system based on the automobile digital tuning power amplifier according to claim 1, characterized in that: the Bluetooth digital audio module (4) is integrated with a functional module inside the lossless player (6), and the integrated module formed by the Bluetooth digital audio module (4) and the functional module inside the lossless player (6) comprises a third I2S communication interface (7) for receiving digital audio signals, a UART serial port (8) operating with the outside and a second USB interface (9).

5. The lossless playing system based on the automobile digital tuning power amplifier according to claim 2, characterized in that: the master MCU control module (1) is connected with the hand controller (10) through a first serial port (102).

6. The lossless playing system based on the automobile digital tuning power amplifier according to claim 5, wherein: the hand controller (10) comprises an encoder (1001) and a color screen (1002) for realizing human-computer interaction.