Vehicle-mounted DSP power amplifier sound system

Abstract

The application relates to the field of vehicle-mounted audio, in particular to a vehicle-mounted DSP power amplifier audio, which comprises an interface module, a control module, an audio processing module, an audio conversion module, a microphone module and a power amplifier module, the control module comprises a first unit and a second unit; the first unit comprises an integrated circuit with the model of AK7604 and is used for carrying out DSP decoding on input data and outputting the data to the audio processing module; the second unit comprises an integrated circuit with the model of A7900 and is used for realizing a Bluetooth function, a central control function and an audio data processing function. The audio can be compatible with an Android large-screen machine mounted on a vehicle, can realize a karaoke function in the vehicle, and has low threshold, small distortion, high sound quality purity and large power.

Description

Technical Field

[0001] This application relates to the field of car audio systems, and in particular to a car audio DSP amplifier. Background Technology

[0002] Existing car audio systems are typically connected to a large Android screen inside the car to enable higher quality music playback, voice control, and other functions.

[0003] However, current car audio systems not only suffer from poor sound quality, low power, and high distortion, but also lack the capability or convenience to incorporate wireless karaoke functionality. Some car audio systems with karaoke features experience speaker feedback during use, significantly diminishing the user experience. Furthermore, existing car audio systems suffer from inconvenient adjustment mechanisms; rear passengers often need to touchscreens or connect to a large Android screen for adjustments. This reduces the ease of song switching for rear passengers and in scenarios like camping, and also presents a high learning curve for novice users adjusting volume and pitch.

[0004] Therefore, how to integrate karaoke and wireless connectivity into car audio systems, and improve their ease of adjustment, sound quality, and power, are urgent problems that need to be solved. Utility Model Content

[0005] This application provides a car-mounted DSP amplifier audio system that is compatible with in-vehicle Android large-screen devices, enabling karaoke functionality within the vehicle. It also features low adjustment threshold, low distortion, high sound quality, and high power.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a vehicle-mounted DSP power amplifier audio system, including an interface module, a control module, an audio processing module, an audio conversion module, a microphone module, and a power amplifier module;

[0008] The interface module includes a signal input unit and a signal conditioning unit; the signal input unit is used to receive external audio signals and send them to the control module; the signal conditioning unit is used to receive external conditioning signals and send them to the control module.

[0009] The control module includes a first unit and a second unit. The first unit includes an AK7604 integrated circuit for DSP decoding of input data and outputting it to the audio processing module. The second unit includes an A7900 integrated circuit for implementing Bluetooth functionality, central control functionality, and audio data processing functionality. The central control functionality includes at least controlling the audio conversion module, the first unit, and the microphone module. The audio data processing functionality includes processing data received through the interface module or Bluetooth functionality and sending it to the audio conversion module, the first unit, or the microphone module.

[0010] The audio processing module includes an audio processor, used to amplify or cancel noise in the received audio signal and send it to the audio conversion module.

[0011] The audio conversion module includes an audio converter and an audio operational amplifier, used to improve sound quality, and to convert or send multiple audio signals to the power amplifier module, or to send multiple audio signals to the RCA port;

[0012] The power amplifier module includes a multi-channel power amplifier and multiple speakers, used to amplify and play audio signals;

[0013] The microphone module includes a microphone control unit and multiple microphones. The microphone control unit is connected to the second unit, and the multiple microphones are wirelessly connected to the microphone control unit. The microphone module is used to implement karaoke functionality.

[0014] In a preferred embodiment of this application, the signal input unit may be further configured to include an original vehicle audio source input interface for receiving signals from an in-vehicle Android large-screen device, and the original vehicle audio source input interface shall be at least four sets.

[0015] The original car audio input interface sends the signal from the Android large-screen device to the audio conversion module.

[0016] In a preferred embodiment of this application, the signal conditioning unit may be further configured to include encoder VOL, encoder BASS, and encoder TRE, which are respectively used to receive volume adjustment signals, bass adjustment signals, and treble adjustment signals.

[0017] In a preferred embodiment of this application, the audio processor may be further configured to include:

[0018] The integrated circuit with model number BA3121.

[0019] In a preferred embodiment of this application, the audio converter may be further configured to include an integrated circuit of model number CD4052, and the audio operational amplifier may include an integrated circuit of model number TL084A.

[0020] In a preferred embodiment of this application, it may be further configured to include a 20-pin motherboard power connector.

[0021] In a preferred embodiment of this application, the power amplifier module may be further configured such that the multi-channel power amplifier includes a power amplifier chip of model TDA-7850, which is used to implement 8 audio output channels; the power amplifier chip of model TDA-7850 is connected to multiple speakers.

[0022] In a preferred embodiment of this application, the audio operational amplifier may further include an integrated circuit of model LM837MX.

[0023] In a preferred embodiment of this application, the signal input unit may further include an AUX input interface.

[0024] In a preferred example of this application, it may further be configured to include:

[0025] The subwoofer module, including an active subwoofer unit and a passive subwoofer unit, is used to play low-frequency audio signals;

[0026] The active subwoofer unit includes a set of RAC ports and an active subwoofer, which is connected to the integrated circuit of model TL084A in the audio conversion module;

[0027] The passive subwoofer unit includes a passive subwoofer, which is pluggably connected to the multi-channel amplifier of the amplifier module.

[0028] The active subwoofer uses an MC4558 power amplifier chip.

[0029] In summary, compared with the prior art, the beneficial effects of the technical solution provided in this application include at least the following:

[0030] This application provides a car-mounted DSP amplifier audio system that integrates integrated circuits of model AK7604 and A7900. It features an audio processing module, an audio conversion module, and an open interface, supporting multi-channel amplifiers and connecting multiple subwoofers to achieve high-quality audio output. For example, the amplifier module can support 8-channel audio output, and the audio conversion and audio processing modules can optionally be connected to external active or passive subwoofer circuits, realizing an "8.2" amplifier and improving the user's listening experience.

[0031] The amplifier is compatible with in-car Android large-screen displays, offering not only superior sound quality, high power, and low distortion, but also wireless karaoke functionality, significantly enhancing the user experience. Furthermore, it supports Bluetooth communication, allowing direct adjustment via smartphones or other devices, eliminating the need for touch controls or connection to an Android large-screen display. This improves convenience for rear passengers and those in outdoor camping scenarios when switching songs. Additionally, the inclusion of volume and pitch adjustment knobs lowers the barrier to entry for sound tuning.

[0032] The power amplifier module boasts a power output of 4*50W, improving signal-to-noise ratio, sound quality purity, and power. Furthermore, through the DSP decoding function of the integrated circuit, it supports formats such as MP3, WMA, APE, FLAC, AAC, MP4, M4A, and WAV. Attached Figure Description

[0033] Figure 1 This is a module diagram of a car DSP power amplifier audio system provided in one embodiment of this application.

[0034] Figure 2 This is a circuit connection diagram of a car DSP power amplifier audio system provided in one embodiment of this application.

[0035] Figure 3 This is a circuit connection diagram of a subwoofer module for a car DSP power amplifier audio system, provided as an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In one embodiment of this application, a car-mounted DSP amplifier audio system is provided; please refer to [link / reference]. Figure 1 As shown, it includes an interface module 100, a control module 200, an audio processing module 300, an audio conversion module 400, a microphone module 500, and a power amplifier module 600.

[0038] The interface module 100 includes a signal input unit 101 and a signal conditioning unit 102; the signal input unit is used to receive external audio signals and send them to the control module; the signal conditioning unit is used to receive external conditioning signals and send them to the control module.

[0039] The control module 200 includes a first unit 201 and a second unit 202. The first unit includes an integrated circuit of model AK7604, used for DSP decoding of input data and outputting it to the audio processing module. The second unit includes an integrated circuit of model A7900, used for implementing Bluetooth function, central control function and audio data processing function. The central control function includes at least controlling the audio conversion module, the first unit and the microphone module. The audio data processing function includes processing data received through the interface module or Bluetooth function and sending it to the audio conversion module, the first unit or the microphone module.

[0040] The audio processing module 300 includes an audio processor for amplifying or canceling noise in the received audio signal and sending it to the audio conversion module.

[0041] The audio conversion module 400 includes an audio converter and an audio operational amplifier, used to improve sound quality, and to convert or send multiple audio signals to the power amplifier module, or to send multiple audio signals to the RCA port;

[0042] The microphone module 500 includes a microphone control unit and multiple microphones. The microphone control unit is connected to the second unit, and the multiple microphones are wirelessly connected to the microphone control unit. The microphone module is used to implement karaoke functionality.

[0043] The power amplifier module 600 includes a multi-channel power amplifier and multiple speakers for amplifying and playing audio signals.

[0044] For specific implementation details, please refer to the connection relationships between the modules. Figure 1 As shown, the speaker receives adjustment signals or external audio signals via an interface. The received signals are input to the control module, which performs decoding processing such as frequency division, equalization, and delay on the received digital audio signals. These signals are then sent to the audio processing module and audio conversion module for power amplification and driving, and finally played back through the power amplifier module. The speaker also features wireless karaoke functionality, including a microphone control unit and multiple microphones. This provides more flexible signal acquisition, is not limited by wired communication, and allows convenient microphone use for rear passengers or in wireless scenarios such as outdoors.

[0045] The speaker includes integrated circuits of models AK7604 and A7900. The AK7604, as a DSP decoder, not only boasts stronger decoding capabilities, purer sound quality, and a higher signal-to-noise ratio, but also supports DSP functions, Bluetooth functionality, and its own decoding playback capabilities. It supports MP3, WMA, APE, FLAC, AAC, MP4, M4A, WAV, and other formats, and can be wirelessly controlled via mobile phones and other devices, enhancing ease of operation.

[0046] The circuit components of the power amplifier speaker are connected as follows: Figure 2 As shown.

[0047] In this embodiment, integrated circuits of model AK7604 and A7900 are incorporated, and an audio processing module, an audio conversion module, and an open interface are provided. This allows for multi-channel power amplifiers and connection of multiple subwoofers to achieve high-quality audio output. For example, the power amplifier module can support 8 channels of output audio, and the audio conversion and audio processing modules can optionally be connected to external active or passive subwoofer circuits, realizing an "8.2" power amplifier and improving the user experience.

[0048] Compatible with in-car Android large-screen displays, this system boasts superior sound quality, high power, and low distortion, and also features wireless karaoke functionality, significantly enhancing the user experience. Furthermore, it supports Bluetooth communication, allowing direct adjustment via smartphones or other devices, eliminating the need for touch controls or connection to the Android large-screen display. This improves convenience for rear passengers and those in outdoor camping scenarios when switching songs. The addition of volume and pitch adjustment knobs lowers the barrier to entry for sound tuning. The amplifier module delivers 4*50W of power, improving signal-to-noise ratio, sound purity, and power output. The integrated circuit's DSP decoding function supports MP3, WMA, APE, FLAC, AAC, MP4, M4A, and WAV formats.

[0049] In some embodiments, the signal input unit further includes an AUX input interface.

[0050] In this embodiment, the input signal pathways are increased, improving ease of use.

[0051] In some embodiments, the audio processor includes:

[0052] The integrated circuit with model number BA3121.

[0053] In some embodiments, the audio operational amplifier further includes an integrated circuit of model LM837MX.

[0054] In some embodiments, the audio converter includes an integrated circuit of model number CD4052, and the audio operational amplifier includes an integrated circuit of model number TL084A.

[0055] In some embodiments, it also includes:

[0056] 20-pin motherboard power connector;

[0057] The signal input unit includes an original vehicle audio source input interface for receiving signals from the in-vehicle Android large screen device, and the original vehicle audio source input interface has at least 4 sets.

[0058] The original car audio input interface sends the signal from the Android large-screen device to the audio conversion module.

[0059] In this embodiment, the power output interface adopts the mainstream 20-pin power and output interface, which is compatible with current large-screen devices, allowing the speaker to be used for the modification of in-vehicle large-screen Android devices, while significantly improving the sound quality.

[0060] In some embodiments, the signal conditioning unit includes encoder VOL, encoder BASS, and encoder TRE, which are used to receive volume adjustment signals, bass adjustment signals, and treble adjustment signals, respectively.

[0061] In this embodiment, the volume is adjusted by an easy-to-use knob, which improves the convenience of operating the audio system for non-professionals.

[0062] In some embodiments, the multi-channel amplifier of the amplifier module includes a TDA-7850 amplifier chip for implementing eight audio output channels; the TDA-7850 amplifier chip is connected to multiple speakers.

[0063] In specific implementation, the power amplifier is an 8-channel dual analog power amplifier, such as... Figure 2 As shown, it includes an integrated circuit of model TDA7850, which can be connected to four speakers: front left, front right, rear left, and rear right.

[0064] In this embodiment, the power amplifier supports independent adjustment of each channel and supports high-pass and low-pass adjustment, which improves the user experience.

[0065] In some embodiments, it also includes:

[0066] The subwoofer module, including an active subwoofer unit and a passive subwoofer unit, is used to play low-frequency audio signals;

[0067] The active subwoofer unit includes a set of RAC ports and an active subwoofer, which is connected to the integrated circuit of model TL084A in the audio conversion module;

[0068] The passive subwoofer unit includes a passive subwoofer, which is pluggably connected to the multi-channel amplifier of the amplifier module.

[0069] The active subwoofer uses an MC4558 power amplifier chip. In specific implementation... Figure 3 The diagram shows the connection of some circuit components for the active and passive subwoofers. Figure 3 The active subwoofer uses an MC4558 amplifier chip and a TDA7851 amplifier to connect to the front center left and right, rear left and rear right speakers. The active subwoofer is connected to... Figure 2The RCA port in the center receives audio signals from the RCA port. This setup makes the sound from the front center speaker not only more three-dimensional and spatial, but also more saturated.

[0070] The passive subwoofer can be optionally plugged into the output port of the 8-channel power amplifier chip, and the active subwoofer and the passive subwoofer are designed independently of each other.

[0071] In this embodiment, not only is a deep bass function added, improving the user experience, but also costs are saved by using a pluggable passive subwoofer.

[0072] 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. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A car-mounted DSP amplifier audio system, characterized in that, It includes an interface module, a control module, an audio processing module, an audio conversion module, a microphone module, and a power amplifier module; The interface module includes a signal input unit and a signal conditioning unit; the signal input unit is used to receive external audio signals and send them to the control module; the signal conditioning unit is used to receive external conditioning signals and send them to the control module. The control module includes a first unit and a second unit. The first unit includes an AK7604 integrated circuit for DSP decoding of input data and outputting it to the audio processing module. The second unit includes an A7900 integrated circuit for implementing Bluetooth functionality, central control functionality, and audio data processing functionality. The central control functionality includes controlling the audio conversion module, the first unit, and the microphone module. The audio data processing functionality includes processing data received through the interface module or Bluetooth functionality and sending it to the audio conversion module, the first unit, or the microphone module. The audio processing module includes an audio processor, used to amplify or cancel noise in the received audio signal and send it to the audio conversion module. The audio conversion module includes an audio converter and an audio operational amplifier, used to improve sound quality, and to convert or send multiple audio signals to the power amplifier module, or to send multiple audio signals to the RCA port; The power amplifier module includes a multi-channel power amplifier and multiple speakers, used to amplify and play audio signals; The microphone module includes a microphone control unit and multiple microphones. The microphone control unit is connected to the second unit, and the multiple microphones are connected to the microphone control unit via wireless communication. The microphone module is used to implement karaoke functionality.

2. The in-vehicle DSP amplifier audio system according to claim 1, characterized in that, The signal input unit includes an original vehicle audio source input interface for receiving signals from the in-vehicle Android large screen device, and the original vehicle audio source input interface has at least 4 sets. The original car audio input interface sends the signal from the Android large-screen device to the audio conversion module.

3. The in-vehicle DSP amplifier audio system according to claim 2, characterized in that, The signal conditioning unit includes encoder VOL, encoder BASS, and encoder TRE, which are used to receive volume adjustment signals, bass adjustment signals, and treble adjustment signals, respectively.

4. The in-vehicle DSP amplifier audio system according to claim 1, characterized in that, The audio processor includes: An integrated circuit with the model number BA3121.

5. The in-vehicle DSP amplifier audio system according to claim 4, characterized in that, The audio converter includes an integrated circuit of model number CD4052, and the audio operational amplifier includes an integrated circuit of model number TL084A.

6. The in-vehicle DSP amplifier audio system according to claim 1, characterized in that, It also includes a 20-pin motherboard power connector.

7. The in-vehicle DSP amplifier audio system according to claim 5, characterized in that, The multi-channel power amplifier module includes a power amplifier chip of model TDA-7850, which is used to realize 8 audio output channels; the power amplifier chip of model TDA-7850 is connected to multiple speakers.

8. The in-vehicle DSP amplifier audio system according to claim 6, characterized in that, The audio operational amplifier also includes an integrated circuit of model LM837MX.

9. The in-vehicle DSP amplifier audio system according to claim 2, characterized in that, The signal input unit also includes an AUX input interface.

10. The in-vehicle DSP amplifier audio system according to claim 7, characterized in that, Also includes: The subwoofer module, including an active subwoofer unit and a passive subwoofer unit, is used to play low-frequency audio signals; The active subwoofer unit includes a set of RAC ports and an active subwoofer, which is connected to the integrated circuit of model TL084A in the audio conversion module; The passive subwoofer unit includes a passive subwoofer, which is pluggably connected to the multi-channel amplifier of the amplifier module. The active subwoofer uses an MC4558 power amplifier chip.

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