Automobile audio DSP power amplifier device and system

Abstract

The application discloses a kind of automobile sound DSP power amplifier device and system, device includes: audio processing conversion unit includes first power amplifier unit, and with the first power amplifier unit respectively connected original car input unit and audio conversion unit, original car input unit is connected with audio conversion unit, first power amplifier unit is connected with audio processing unit, audio processing unit is connected with audio conversion unit;Loudspeaker unit includes first audio amplifier unit, and with the second power amplifier unit of first audio amplifier unit connection;Audio output unit includes second audio amplifier unit, and with the third audio amplifier unit of second audio amplifier unit connection;Audio conversion unit is connected with first audio amplifier unit and second audio amplifier unit respectively.The application has high-quality DSP sound effect, power is big, signal-to-noise ratio is high, distortion is small, supports multiple audio formats and Bluetooth function, and sound effect adjustment operation is simple and convenient, and the compatibility of system is strong.

Description

Technical Field

[0001] This invention relates to the field of automotive amplifier technology, and in particular to an automotive audio DSP amplifier. Background Technology

[0002] Currently, commonly used car amplifiers are generally for MP3, MP5, or large-screen Android devices. These large-screen devices use TDA7388 or YD7388 amplifiers, which achieve a power output of 4 x 25W. Android large-screen devices, in particular, use thin heatsinks, resulting in a power output of only 16W. This not only results in low power but also severe distortion and a low signal-to-noise ratio. Furthermore, existing DSP amplifiers generally use manual knobs for adjustment, which is neither precise nor convenient. Some DSP amplifiers also use computer tuning, which is complex and unfriendly to non-professionals. In addition, many existing DSPs lack Bluetooth or built-in decoding playback functionality. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention aims to provide a car audio DSP amplifier device and system that integrates decoding and Bluetooth functional chips, enabling playback via Bluetooth and its own decoding, and features high power, low distortion, and high sound quality.

[0004] In a first aspect, the present invention provides a car audio DSP amplifier device, the device comprising:

[0005] An audio processing and conversion unit, and a speaker unit and an audio output unit connected to the audio processing and conversion unit;

[0006] The audio processing and conversion unit includes a first power amplifier unit, and an original vehicle input unit and an audio conversion unit respectively connected to the first power amplifier unit. The original vehicle input unit is connected to the audio conversion unit, the first power amplifier unit is connected to the audio processing unit, and the audio processing unit is connected to the audio conversion unit.

[0007] The speaker unit includes a first audio operational amplifier unit and a second power amplifier unit connected to the first audio operational amplifier unit;

[0008] The audio output unit includes a second audio operational amplifier unit and a third audio operational amplifier unit connected to the second audio operational amplifier unit;

[0009] The audio conversion unit is connected to the first audio operational amplifier unit and the second audio operational amplifier unit, respectively.

[0010] Furthermore, the first power amplifier unit includes an encoding / decoding unit, an FM receiver unit and a Bluetooth unit connected to the encoding / decoding unit.

[0011] Furthermore, the encoding / decoding unit is connected to the original vehicle input unit, the audio conversion unit, and the audio processing unit.

[0012] Furthermore, the device also includes a switch control unit, a power supply unit, and an external input unit, wherein the switch control unit, the power supply unit, and the external audio input unit are connected to the audio processing and conversion unit.

[0013] Furthermore, the switch control unit, the power supply unit, and the external audio input unit are connected to the first power amplifier unit.

[0014] Furthermore, the first power amplifier unit includes an AUX input interface.

[0015] Furthermore, the first power amplifier unit is a DSP power amplifier unit.

[0016] Secondly, the present invention provides an automotive audio DSP amplifier system, the system comprising the automotive audio DSP amplifier device as described above, and further comprising: a data terminal connected to the audio processing and conversion unit.

[0017] Furthermore, the data terminal is connected to the first power amplifier unit via the Bluetooth unit, and the data terminal includes a PC host and a smartphone.

[0018] The present invention provides a car audio DSP amplifier device and system. Through this system, its own decoding playback and Bluetooth functions are built into the chip. Using mainstream power supplies and output interfaces, the present invention not only features high-quality DSP sound effects, high power and high signal-to-noise ratio, low distortion, and support for multiple audio formats and Bluetooth functionality, but also offers simple and convenient sound effect adjustment. The system has strong compatibility, being compatible with current large-screen audio systems, and improving the sound quality and effects of large-screen audio systems and other car audio systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the car audio DSP device provided in an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of the first power amplifier unit;

[0021] Figure 3 This is a schematic diagram of the structure of the car audio DSP system provided in an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 The first embodiment of the present invention provides a car audio DSP device, comprising: an audio processing and conversion unit, and a speaker unit and an audio output unit connected to the audio processing and conversion unit. The audio processing and conversion unit includes a first power amplifier unit 1, and a vehicle input unit 4 and an audio conversion unit 3 respectively connected to the first power amplifier unit 1. The vehicle input unit 4 and the audio conversion unit 3 are connected. The first power amplifier unit 1 is connected to an audio processing unit 2, and the audio processing unit 2 is connected to the audio conversion unit 3. The speaker unit includes a first audio operational amplifier unit 5 and a second power amplifier unit 6, which are connected. The audio output unit includes a second audio operational amplifier unit 7 and a third audio operational amplifier unit 8, which are connected. The audio conversion unit 3 is connected to both the first audio operational amplifier unit 5 and the second audio operational amplifier unit 7.

[0024] from Figure 1 As can be seen, in this embodiment, after the original vehicle input unit 4 receives the audio input from the original vehicle, it transmits it to the first power amplifier unit 1 for audio processing. The processed original vehicle audio is then transmitted to the audio processing unit 2 for further processing. The main function of the audio processing unit 2 is to perform isolation and noise reduction to eliminate noise. Here, we preferably use the BA3121 series circuit for audio processing to achieve better isolation and noise reduction effects. The noise-reduced audio is transmitted to the audio conversion unit 3 through a circuit connection. At the same time, the original vehicle input unit 4 also inputs the original vehicle audio to the audio conversion unit 3, and the first power amplifier unit 1 controls the audio conversion unit 3. The audio conversion unit 3 is a differential 4-channel digital control analog switch, which is a four-way sound source input switching switch. Its main function is to switch audio signal sources. In this embodiment, we preferably use the CD4052 series circuit to switch the signals from different signal sources to the audio power amplifier, namely the first audio operational amplifier unit 5 and the second audio operational amplifier unit 7 in this application. It should be noted that all chip types used in this embodiment are not specifically limited but preferred. The specific types used can be flexibly selected according to the actual situation, and will not be described in detail later.

[0025] The speaker unit in this embodiment includes a first audio operational amplifier unit 5 and a second power amplifier unit 6. The first audio operational amplifier unit 5 amplifies the input audio through operational amplification before transmitting it to the second power amplifier unit 6. After amplification, the audio can be output through the speaker. In this embodiment, the TL084 series circuit is preferably used as the first audio operational amplifier unit 5, and the TDA7850 is preferably used as the second power amplifier unit 6. That is to say, this embodiment uses two types of power amplifiers, the first power amplifier unit 1 and the second power amplifier unit 6, for audio processing, thereby reducing audio distortion, further improving sound quality, and making the output audio power greater and the signal-to-noise ratio higher.

[0026] Furthermore, the audio output unit in this embodiment includes a second audio operational amplifier unit 7 and a third audio operational amplifier unit 8. The second audio operational amplifier unit 7 is mainly used for vehicle audio output, including RCA interfaces such as RCA-OUT / FL, RCA-OUT / FR, RCA-OUT / RL, and RCA-OUT / RR. The third audio operational amplifier unit 8 is mainly used for sound effect output, and can input low-frequency and heavy-frequency effects. It can provide interfaces such as SUB-OUT. Here, it is preferable to use the 4558 series circuit as the third audio operational amplifier unit 8, and it is preferable to use the TL084 series circuit as the second audio operational amplifier unit 7.

[0027] In this embodiment, the first power amplifier unit 1 is not a power amplifier with only simple encoding and decoding functions as in the prior art. Instead, it integrates its own encoding and decoding functions as well as multiple functions such as Bluetooth and FM reception. Compared with the prior art, which requires adding multiple functional modules to achieve these functions, it integrates them all, thereby further reducing manufacturing costs. Figure 2 As shown, the first power amplifier unit 1 includes an encoding / decoding unit 111, and an FM receiver unit 112 and a Bluetooth unit 113 connected to the encoding / decoding unit 111. That is to say, the audio received through FM and Bluetooth can be processed by the encoding / decoding unit 111 to improve the sound quality. Since the first power amplifier unit 1 provides a variety of encoding / decoding units, such as encoder TRE, encoder RASS, encoder VOL, etc., it can not only adjust the volume, but also adjust the treble and bass, and set multiple sound effect types that can be switched, such as pop, jazz, rock, etc. In this embodiment, a DSP chip is preferably used as the first power amplifier unit, and the A7900 DSP chip is preferably used.

[0028] Furthermore, the first power amplifier unit 1 in this embodiment also provides an AUX input interface for connecting external devices such as headphones, as well as a USB interface, a power interface, and an ACC switch control interface. Therefore, the switch control unit 9, the power supply 10, and the external input unit 11 in this embodiment can all be connected to the device through the various interfaces of the first power amplifier unit 1. In other words, the DSP power amplifier device in this embodiment can not only process the original car audio, but also process FM audio, as well as audio input via USB and audio input via Bluetooth, realizing multiple audio input functions.

[0029] To broaden the application of the DSP amplifier device, this embodiment also preferably incorporates a voice playback function. Specifically, the device includes a voice input unit and a voice storage unit. The voice input unit is connected to the first amplifier unit 1, and the voice storage unit is connected to the second amplifier unit 6. The voice input unit has a microphone interface and a second Bluetooth unit, allowing connection to both standard microphones and Bluetooth microphones. Through the microphone, the voice input unit receives voice input in real time and processes it via the first amplifier unit 1. The played audio can also be stored in the voice storage unit. In other words, the DSP amplifier device in this embodiment can not only process in-vehicle audio but also process voice input via a microphone and perform karaoke functions by combining voice and audio. This gives the device multiple functions, making it suitable for various applications, such as high-quality in-vehicle presentations, in-vehicle tour guides, in-vehicle karaoke, and in-vehicle music playback, achieving functions typically found only in various in-vehicle devices.

[0030] In this embodiment, an intelligent sound tuning function is preferably added to the DSP amplifier. An environmental recognition module identifies noise in the surrounding environment. When the noise level exceeds a preset threshold, the surrounding environment is categorized according to noise type, such as commuting, quiet, or noisy. Based on the different environment types, the DSP amplifier automatically tunes the sound. An intelligent recognition switch is preferably included. When the user selects the intelligent recognition function, the DSP amplifier automatically collects and identifies ambient noise and automatically tunes the sound. This tuning is not a one-time event; the device continuously identifies noise at certain frequencies. When the surrounding environment changes, it automatically adjusts the sound effects accordingly, ensuring optimal matching between the sound and the environment, thus enhancing the user experience. Users can also choose manual tuning or select from various pre-configured sound effects provided by the device. The multiple sound effect options further facilitate user operation and improve user comfort.

[0031] Please see Figure 3Based on the same inventive concept, the second embodiment of this invention proposes a car audio DPS amplifier system. In addition to the DPS amplifier device described above, the system also includes a data terminal 20. The data terminal 20 is connected to the DPS amplifier device via a Bluetooth unit 113. The data terminal 20 can be a PC or a smartphone. In this embodiment, it is preferred to connect to the DSP amplifier device and control it via an APP installed on the data terminal 20, including volume adjustment, sound effect adjustment, audio selection, etc. Furthermore, the Bluetooth unit 113 supports A2DP long-distance reception and transmission, making connection and transmission more convenient.

[0032] In addition to controlling the DPS amplifier device via the data terminal 20, this embodiment can also be controlled via an external large-screen device. The DSP amplifier device in this embodiment provides multiple universal interfaces, which can be connected to a common Android large-screen device via a data cable. Through the in-vehicle large-screen device, various options can be selected for the sound effects, volume, and audio of the DSP amplifier device. Furthermore, the DPS amplifier device also provides a manual encoder knob, which can be used to adjust the volume, treble, bass, etc., and also provides an automatic adjustment function for intelligent tuning. This embodiment offers diverse adjustment methods and convenient operation, solving the inconvenience of traditional manual or computer-based professional tuning.

[0033] In summary, the present invention provides a car audio DSP amplifier device and system. The device includes an audio processing and conversion unit, and a speaker unit and an audio output unit connected to the audio processing and conversion unit. The audio processing and conversion unit includes a first amplifier unit, and an original vehicle input unit and an audio conversion unit respectively connected to the first amplifier unit. The original vehicle input unit is connected to the audio conversion unit, the first amplifier unit is connected to the audio processing unit, and the audio processing unit is connected to the audio conversion unit. The speaker unit includes a first audio operational amplifier unit and a second amplifier unit connected to the first audio operational amplifier unit. The audio output unit includes a second audio operational amplifier unit and a third audio operational amplifier unit connected to the second audio operational amplifier unit. The audio conversion unit is connected to both the first audio operational amplifier unit and the second audio operational amplifier unit. This invention integrates its own decoding playback and Bluetooth functions into the chip, adopts mainstream power supply and output interface, and not only has high-quality DSP sound effects, high power and high signal-to-noise ratio, low distortion, and supports multiple audio formats and Bluetooth function, but also has simple and convenient sound effect adjustment operation, strong system compatibility, and can be compatible with current large screen machines, improving and enhancing the sound quality and sound effects of large screen machines and other car audio systems.

[0034] The various embodiments in this specification are described in a progressive manner. For directly identical or similar parts among the embodiments, refer to each other. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the device embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the device embodiments. It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0035] The embodiments described above are merely preferred embodiments of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various improvements and substitutions without departing from the technical principles of this invention, and these improvements and substitutions should also be considered within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the scope of the claims.

Claims

1. A car audio DSP amplifier device, characterized in that, include: An audio processing and conversion unit, and a speaker unit and an audio output unit connected to the audio processing and conversion unit; The audio processing and conversion unit includes a first power amplifier unit, and an original vehicle input unit and an audio conversion unit respectively connected to the first power amplifier unit. The original vehicle input unit is connected to the audio conversion unit, and the first power amplifier unit is connected to the audio processing unit. The audio processing unit is an isolation noise reduction circuit based on the BA3121 series circuit. The audio processing unit is connected to the audio conversion unit. The audio conversion unit is a differential 4-channel digital control analog switch. The CD4052 series circuit switches signals from different signal sources to the audio power amplifier. The speaker unit includes a first audio operational amplifier unit and a second power amplifier unit connected to the first audio operational amplifier unit. The first audio operational amplifier unit adopts the TL084 series circuit, and the second power amplifier unit adopts the TDA7850 power amplifier chip. The audio output unit includes a second audio operational amplifier unit and a third audio operational amplifier unit connected to the second audio operational amplifier unit. The second audio operational amplifier unit adopts a TL084 series circuit, and the third audio operational amplifier unit adopts a 45S series circuit to provide a low-frequency output interface. The audio conversion unit is connected to the first audio operational amplifier unit and the second audio operational amplifier unit respectively; The first power amplifier unit is a DSP power amplifier unit, specifically using an A7900DSP chip, which integrates an encoding / decoding unit, an FM receiver unit connected to the encoding / decoding unit, and a Bluetooth unit; the device also includes a switch control unit, a power supply unit, and an external input unit connected to the first power amplifier unit, wherein the external input unit includes at least an AUX input interface; The original vehicle input unit receives the audio from the original vehicle and transmits it to the first power amplifier unit for audio processing. The processed original vehicle audio is then transmitted to the audio processing unit for further processing. The audio processing unit performs noise reduction and isolation. The noise-reduced audio is then transmitted to the audio conversion unit via a circuit connection. Simultaneously, the original vehicle input unit inputs the original vehicle audio to the audio conversion unit, and the first power amplifier unit controls the audio conversion unit, which then switches the audio signal source.

2. The car audio DSP amplifier device according to claim 1, characterized in that, The encoding / decoding unit is connected to the original vehicle input unit, the audio conversion unit, and the audio processing unit.

3. The car audio DSP amplifier device according to claim 1, characterized in that, The switch control unit, the power supply unit, and the external input unit are connected to the first power amplifier unit.

4. A car audio DSP amplifier system, characterized in that, The system includes the car audio DSP amplifier device as described in any one of claims 1 to 3, and further includes a data terminal connected to the audio processing and conversion unit.

5. The car audio DSP amplifier system according to claim 4, characterized in that, The data terminal is connected to the first power amplifier unit via the Bluetooth unit, and the data terminal includes a PC host and a smartphone.

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