Vehicle-mounted sound system and automobile

Abstract

The utility model discloses a vehicle-mounted sound system and an automobile. According to the vehicle-mounted sound system, the entertainment host compresses and decomposes one path of audio signal obtained by decoding a sound source into two paths of audio signals through the internal audio decomposition module and transmits the two paths of audio signals to the power amplifier, and the power amplifier synthesizes the two paths of received audio signals into one path of audio signal through the internal audio synthesis module; therefore, the consistent restoration of the audio sampling rate can be ensured, the high-fidelity transmission of the audio signal is ensured, the vehicle-mounted sound system supports the restoration of a high-sampling-rate sound source, the high-quality sound is ensured to appear, many music details, more sound thickness, fineness, depth and sound pressure level are brought to users, and the extreme music restoration is realized; the A2B link is adopted to realize audio signal transmission between the entertainment host and the power amplifier, the A2B link has a reliable transmission medium and an error correction mechanism, and the audio transmission performance is reliable, so that stable audio transmission is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of audio equipment, in particular to a vehicle-mounted audio system and a vehicle. Background Art

[0002] Traditional audio deletes part of the sound during recording, ensuring only the necessary part, not all of the sound. Therefore, the sound quality restored by traditional audio will be damaged and distorted, and high-fidelity effects cannot be achieved.

[0003] In recent years, with the continuous increase in audio bandwidth and the continuous improvement of lossless compression technology, many online music have begun to launch Hi-Res audio (i.e. high-resolution audio) such as lossless music and mastered music. Hi-Res audio contains a lot of sound information, such as "sound thickness, delicacy, depth, sound pressure level", etc., and the amount of sound information contained is about 6.5 times that of traditional audio; Hi-Res audio captures the original analog audio source digitally with almost no loss, thereby restoring various sounds in detail. Therefore, the sound quality of Hi-Res audio is closer to the original sound, and you can feel the singer's breath and the sense of music on the scene, and other details and atmosphere that could not be heard in traditional audio in the past. It is as if you are in a recording studio and a live concert, immersing yourself in listening to your favorite music, and then discovering subtle details and artistic nuances that you have never heard before.

[0004] However, the sampling rate of Hi-Res audio is as high as 96K, the bit depth is as high as 24bite, and the bit rate is very large. Conventional in-car audio playback systems do not support or cannot restore the high-definition sound quality of these Hi-Res audios, and cannot provide users with high-quality sound quality restoration. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a vehicle-mounted audio system and a vehicle which can support restoration of high sampling rate sound sources and ensure high-quality sound.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A vehicle audio system, comprising an entertainment host, an amplifier and a speaker group; the entertainment host comprises a microprocessor, an audio decoding module, an audio decomposition module and a first A2B interface module, the audio decoding module, the audio decomposition module and the first A2B interface module are respectively connected to the microprocessor, the audio decoding module is used to decode a sound source to obtain one channel of audio signal, the audio decomposition module is used to compress and decompose the decoded one channel of audio signal into two channels of audio signals, the first A2B interface module is used to send the two channels of audio signals compressed and decomposed by the audio decomposition module to the power amplifier; the power amplifier comprises a second A2B interface module block, an audio synthesis module, a sound effect processing module and an audio amplification module, the second A2B interface module is used to receive two audio signals from the first A2B interface module, the audio synthesis module is used to synthesize the two audio signals received by the second A2B interface module into one audio signal, the sound effect processing module is used to perform sound effect algorithm processing on the one audio signal from the audio synthesis module, and the audio amplification module is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and then output it to the speaker group; the speaker group is connected to the audio amplification module, and is used to output sound effects under the control of the output signal of the audio amplification module.

[0008] Preferably, the audio decoding module is used to decode the sound source to obtain a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module is used to compress and decompose the first sampling rate audio signal into two third sampling rate audio signals, the first A2B interface module is used to send the second sampling rate audio signal or the two third sampling rate audio signals to the power amplifier; the second A2B interface module is used to receive the second sampling rate audio signal or the two third sampling rate audio signals from the first A2B interface module, the audio synthesis module is used to synthesize the two third sampling rate audio signals received by the second A2B interface module into a first sampling rate audio signal, the sound effect processing module is used to perform sound effect algorithm processing on the first sampling rate audio signal from the audio synthesis module or the second sampling rate audio signal from the second A2B interface module, and the audio amplification module is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and output it to the speaker group.

[0009] Preferably, the entertainment host further includes a third A2B interface module connected to the microprocessor, the audio decoding module is used to decode the sound source to obtain a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module is used to compress and decompose the first sampling rate audio signal into two third sampling rate audio signals, the first A2B interface module is used to send the two third sampling rate audio signals to the power amplifier, and the third A2B interface module is used to send the second sampling rate audio signal to the power amplifier; the power amplifier further includes a fourth A2B interface module, and the second A2B interface module is used to receive audio signals from the first A2B interface module. The second A2B interface module is used to receive two channels of third sampling rate audio signals from the third A2B interface module, the audio synthesis module is used to synthesize the two channels of third sampling rate audio signals received by the second A2B interface module into one channel of first sampling rate audio signal, the fourth A2B interface module is used to receive one channel of second sampling rate audio signal from the third A2B interface module, the sound effect processing module is used to perform sound effect algorithm processing on one channel of first sampling rate audio signal from the audio synthesis module or one channel of second sampling rate audio signal from the fourth A2B interface module, and the audio amplification module is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and then output it to the speaker group.

[0010] Preferably, the sampling rate f1 of the first sampling rate audio signal has a value range of 48kHz<f1≤96kHz; and the sampling rate f2 of the second sampling rate audio signal has a value range of 48kHz≤48kHz.

[0011] Preferably, the sampling rate of the third sampling rate audio signal is f3=f1 / 2.

[0012] Preferably, the audio decomposition module is built into the microprocessor, and the audio synthesis module is built into the sound effect processing module.

[0013] Preferably, the speaker group includes a tweeter, a midrange speaker and a woofer; the upper limit of the sound frequency output by the tweeter is 40KHz; the lower limit of the sound frequency output by the woofer is f2≥35KHz.

[0014] Preferably, the entertainment host also includes a Bluetooth interface module, and the Bluetooth interface module is connected to the microprocessor.

[0015] A car comprises the above-mentioned car audio system.

[0016] The beneficial technical effect of the utility model is that in the above-mentioned in-vehicle audio system, the entertainment host compresses and decomposes one audio signal obtained by decoding the sound source into two audio signals through the internal audio decomposition module and transmits them to the power amplifier. The power amplifier synthesizes the two received audio signals into one audio signal through the internal audio synthesis module, thereby ensuring the consistent restoration of the audio sampling rate and high-fidelity transmission of the audio signal, so that the in-vehicle audio system supports the restoration of high-sampling rate sound sources, ensuring high-quality sound, bringing users more music details, more sound thickness, delicacy, depth, and sound pressure level, and realizing the ultimate music restoration; an A2B link is used to realize the audio signal transmission between the entertainment host and the power amplifier. The A2B link has a reliable transmission medium and error correction mechanism, and the audio transmission performance is reliable, thereby ensuring stable audio transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the framework structure of a vehicle audio system in one embodiment of the utility model;

[0018] Figure 2 Schematic diagram of the framework structure of a vehicle audio system in another embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to enable ordinary technicians in the field to more clearly understand the purpose, technical solutions and advantages of the utility model, the utility model is further explained below in conjunction with the accompanying drawings and embodiments.

[0020] The utility model provides a vehicle-mounted audio system.

[0021] like Figure 1 As shown, in one embodiment of the utility model, the vehicle audio system includes an entertainment host 10, an amplifier 20 and a speaker group 30; the entertainment host 10 includes a microprocessor 11, an audio decoding module 12, an audio decomposition module 13 and a first A2B interface module 14, and the audio decoding module 12, the audio decomposition module 13, and the first A2B interface module 14 are respectively connected to the microprocessor 11; the power amplifier 20 includes a second A2B interface module 21, an audio synthesis module 23, a sound effect processing module 24 and an audio amplification module 25.

[0022] The audio decoding module 12 is used to decode the sound source to obtain a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module 13 is used to compress and decompose the first sampling rate audio signal into two third sampling rate audio signals, and the first A2B interface module 14 is used to send the second sampling rate audio signal or the two third sampling rate audio signals to the power amplifier 20. The sampling rate f1 of the first sampling rate audio signal has a value range of 48kHz<f1≤96kHz; the sampling rate f2 of the second sampling rate audio signal is ≤48kHz; the sampling rate f3 of the third sampling rate audio signal is f1 / 2.

[0023] In this embodiment, the audio decomposition module 13 only compresses and decomposes the first sampling rate audio signal with a sampling rate greater than 48kHz and less than or equal to 96kHz, and does not process the second sampling rate audio signal with a sampling rate less than or equal to 48kHz, and directly sends it to the power amplifier 20 through the first A2B interface module 14. For example, when the audio decoding module 12 decodes the sound source to obtain a first sampling rate audio signal with a sampling rate of 96kHz, the audio decomposition module 13 compresses and decomposes the first sampling rate audio signal with a sampling rate of 96kHz to obtain two third sampling rate audio signals with a sampling rate of 48kHz; when the audio decoding module 12 decodes the sound source to obtain a second sampling rate audio signal with a sampling rate of 48kHz, the audio decomposition module 13 does not process the second sampling rate audio signal with a sampling rate of 48kHz, and directly sends the second sampling rate audio signal with a sampling rate of 48kHz to the power amplifier 20 through the first A2B interface module 14. In other embodiments of the present invention, regardless of whether the audio signal obtained by decoding the sound source by the audio decoding module 12 is a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module 13 compresses and decomposes the audio signal decoded by the audio decoding module 12 to obtain two audio signals, and then the first A2B interface module 14 sends the two audio signals compressed and decomposed by the audio decomposition module 13 to the power amplifier 20.

[0024] The second A2B interface module 21 is used to receive one channel of second sampling rate audio signal or two channels of third sampling rate audio signals from the first A2B interface module 14, the audio synthesis module 23 is used to synthesize two channels of third sampling rate audio signals received by the second A2B interface module 21 into one channel of first sampling rate audio signal, the sound effect processing module 24 is used to perform sound effect algorithm processing on one channel of first sampling rate audio signal from the audio synthesis module 23 or one channel of second sampling rate audio signal from the second A2B interface module 21, and the audio amplification module 25 is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and then output it to the speaker group 30. The speaker group 30 is connected to the audio amplification module 25 and is used to output sound effects under the control of the output signal of the audio amplification module 25.

[0025] In this embodiment, the audio signal received by the second A2B interface module 21 from the first A2B interface module 14 may be one channel of second sampling rate audio signal or two channels of third sampling rate audio signal: if one channel of second sampling rate audio signal is received, the audio synthesis module 23 does not need to synthesize the one channel of second sampling rate audio signal, and the second A2B interface module 21 directly sends the one channel of second sampling rate audio signal to the sound effect processing module 24 for sound effect algorithm processing; if two channels of third sampling rate audio signal are received, the audio synthesis module 23 synthesizes the two channels of third sampling rate audio signal into one channel of first sampling rate audio signal, and then sends the synthesized one channel of first sampling rate audio signal to the sound effect processing module 24 for sound effect algorithm processing. In other embodiments of the utility model, the audio signal received by the second A2B interface module 21 from the first A2B interface module 14 may be both two channels of third sampling rate audio signal, and the audio synthesis module 23 synthesizes the two channels of third sampling rate audio signal into one channel of first sampling rate audio signal, and then sends the synthesized one channel of first sampling rate audio signal to the sound effect processing module 24 for sound effect algorithm processing.

[0026] The microprocessor 11 is the main control unit of the entertainment host 10, and can schedule and control various modules in the entertainment host 10. In this embodiment, the microprocessor 11 uses an 8295 chip; in other embodiments, the microprocessor 11 can also use other types of automotive chips on the market.

[0027] The audio decoding module 12 includes a decoding chip. The audio decoding module 12 relies on the decoding chip to perform audio decoding. The decoding chip can be a decoding chip of the AU7850 model, or other types of decoding chips on the market. In other embodiments, the audio decoding module 12 can also be built into the microprocessor 11, that is, the audio decoding function is performed by the corresponding functional module inside the 8295 chip.

[0028] The audio decomposition module 13 is built into the microprocessor 11, that is, the audio decomposition function is executed by the corresponding functional module inside the microprocessor 11 (8295 chip).

[0029] The first A2B interface module 14 and the second A2B interface module 21 both include an audio interface chip of the AD2428 model. The first A2B interface module 14 is paired with the second A2B interface module 21, and an A2B (automotive audio bus) link is used to realize audio signal transmission between the entertainment host 10 and the power amplifier 20. The audio transmission performance is reliable, thereby ensuring stable audio transmission.

[0030] The sound effect processing module 24 includes a DSP chip of model ADSP21593. The DSP chip of model ADSP21593 has a dual-core 2G computing power, and the sound effect algorithm is processed faster, which can achieve a delay of milliseconds, thereby reducing signal transmission delay and ensuring the fluency of real-time audio applications.

[0031] The audio synthesis module 23 is built into the sound effect processing module 24, that is, the audio synthesis function is executed by the corresponding functional module inside the sound effect processing module 24 (DSP chip of ADSP21593).

[0032] The audio amplifier module 25 includes an audio power amplifier chip of model FDA801. The audio amplifier module 25 mainly relies on the audio power amplifier chip to amplify the power of the audio signal.

[0033] The speaker group 30 includes a tweeter, a midrange speaker, and a woofer. To meet the bit rate requirements of Hi-Res audio, the upper limit of the sound frequency output by the tweeter is 40KHz, and the lower limit of the sound frequency output by the woofer is f2≥35KHz. There is a large gap between the upper limit of the sound frequency output by the tweeter and the lower limit of the sound frequency output by the woofer. In this way, the output sound frequency has a wider dynamic range and the overall acoustic experience is better.

[0034] The entertainment host 10 also includes a Bluetooth interface module 16, which is connected to the microprocessor 11. The Bluetooth interface module 16 can be connected to a smart mobile terminal such as a mobile phone or a tablet for receiving a sound source from the smart mobile terminal.

[0035] The working process of the vehicle audio system in the embodiment of the utility model is as follows:

[0036] First, prepare the audio source to be played. The audio source can be downloaded to the entertainment host 10 through online apps installed in the entertainment host 10, such as QQ Music, NetEase Cloud, Sony Music, etc., or input into the entertainment host 10 through a DVD player, CD player, SD card, etc. It can also be transmitted to the entertainment host 10 from smart mobile terminals such as mobile phones and tablets via wireless Bluetooth.

[0037] Secondly, the audio decoding module 12 in the entertainment host 10 decodes the sound source to be played to obtain the corresponding audio signal. If the sampling rate of the sound source to be played is greater than 48kHz and less than or equal to 96kHz, the audio decoding module 12 obtains a first sampling rate audio signal after decoding, and the audio decomposition module 13 compresses and decomposes the first sampling rate audio signal into two third sampling rate audio signals, and sends the two third sampling rate audio signals compressed and decomposed by the audio decomposition module 13 to the power amplifier 20 through the first A2B interface module 14; if the sampling rate of the sound source to be played is less than or equal to 48kHz, the audio decoding module 12 obtains a second sampling rate audio signal after decoding, and the first A2B interface module 14 directly sends the second sampling rate audio signal decoded by the audio decoding module 12 to the power amplifier 20.

[0038] Finally, the power amplifier 20 receives the audio signal from the entertainment host 10 through the second A2B interface module 21 . If the second A2B interface module 21 receives two third sampling rate audio signals sent from the first A2B interface module 14, the audio synthesis module 23 synthesizes the two third sampling rate audio signals into one first sampling rate audio signal, and the sound effect processing module 24 performs sound effect algorithm processing on the one first sampling rate audio signal, and then the audio amplification module 25 performs power amplification processing (provides sufficient power) on the one first sampling rate audio signal processed by the sound effect algorithm and outputs it to the speaker group 30, driving the speaker group 30 to play strong and high-definition sound effects, bringing more music details, more sound thickness, delicacy, depth, and sound pressure level, and achieving ultimate music restoration; if the second A2B interface module 21 receives a second sampling rate audio signal from the first A2B interface module 14, the sound effect processing module 24 directly performs sound effect algorithm processing on the one second sampling rate audio signal, and then the audio amplification module 25 performs power amplification processing on the one second sampling rate audio signal processed by the sound effect algorithm and outputs it to the speaker group 30, driving the speaker group 30 to play music.

[0039] In the vehicle audio system of the embodiment of the utility model, the entertainment host compresses and decomposes the first sampling rate audio signal obtained by decoding the sound source into two third sampling rate audio signals through the internal audio decomposition module and transmits them to the power amplifier. The power amplifier synthesizes the two received third sampling rate audio signals into one first sampling rate audio signal through the internal audio synthesis module, which can ensure the consistent restoration of the audio sampling rate and ensure the high-fidelity transmission of the audio signal, so that the vehicle audio system supports the restoration of high sampling rate sound sources, ensures the high-quality sound, brings more music details, more sound thickness, delicacy, depth, sound pressure level to users, and realizes the ultimate music restoration; the vehicle audio system supports the restoration of sound sources with a sampling rate greater than 48kHz and less than or equal to 96kHz, and supports the restoration of sound sources with a sampling rate less than or equal to 48kHz, and supports multiple audio formats at the same time, with strong compatibility; The A2B link is used to realize the audio signal transmission between the entertainment host and the power amplifier. The A2B link has a reliable transmission medium and error correction mechanism, and the audio transmission performance is reliable, thereby ensuring stable audio transmission; the sound effect processing module uses the ADSP21593 DSP chip to process the audio signal. The dual-core 2G computing power of the ADSP21593 DSP chip makes the sound effect algorithm process faster, and can achieve millisecond delay, thereby reducing signal transmission delay and ensuring the smoothness of real-time audio applications; the upper limit of the sound frequency output by the tweeter is 40KHz, and the lower limit of the sound frequency output by the woofer is f2≥35KHz. There is a large gap between the upper limit of the sound frequency output by the tweeter and the lower limit of the sound frequency output by the woofer. In this way, the output sound frequency has a wider dynamic range and the overall acoustic experience is better.

[0040] like Figure 2 As shown, in another embodiment of the utility model, the vehicle audio system includes an entertainment host 10, an amplifier 20 and a speaker group 30; the entertainment host 10 includes a microprocessor 11, an audio decoding module 12, an audio decomposition module 13, a first A2B interface module 14 and a third A2B interface module 15, and the audio decoding module 12, the audio decomposition module 13, the first A2B interface module 14 and the third A2B interface module 15 are respectively connected to the microprocessor 11; the power amplifier 20 includes a second A2B interface module 21, a fourth A2B interface module 22, an audio synthesis module 23, a sound effect processing module 24 and an audio amplification module 25.

[0041] The audio decoding module 12 is used to decode the sound source to obtain a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module 13 is used to compress and decompose the first sampling rate audio signal into two third sampling rate audio signals, the first A2B interface module 14 is used to send the two third sampling rate audio signals to the power amplifier 20, and the third A2B interface module 15 is used to send the second sampling rate audio signal to the power amplifier 20. The sampling rate f1 of the first sampling rate audio signal has a value range of 48kHz<f1≤96kHz; the sampling rate f2 of the second sampling rate audio signal is ≤48kHz; the sampling rate f3 of the third sampling rate audio signal is f1 / 2. In this embodiment, the audio decomposition module 13 only compresses and decomposes the first sampling rate audio signal with a sampling rate greater than 48kHz and less than or equal to 96kHz, and the audio decomposition module 13 does not process the second sampling rate audio signal with a sampling rate less than or equal to 48kHz, and directly sends it to the power amplifier 20 by the third A2B interface module 15.

[0042] The second A2B interface module 21 is used to receive two channels of third sampling rate audio signals from the first A2B interface module 14, the audio synthesis module 23 is used to synthesize the two channels of third sampling rate audio signals received by the second A2B interface module 21 into one channel of first sampling rate audio signals, the fourth A2B interface module 22 is used to receive one channel of second sampling rate audio signals from the third A2B interface module 15, the sound effect processing module 24 is used to perform sound effect algorithm processing on one channel of first sampling rate audio signals from the audio synthesis module 23 or one channel of second sampling rate audio signals from the fourth A2B interface module 22, and the audio amplification module 25 is used to perform power amplification processing on the audio signals processed by the sound effect algorithm and then output them to the speaker group 30. The speaker group 30 is connected to the audio amplification module 25 and is used to output sound effects under the control of the output signal of the audio amplification module 25.

[0043] The microprocessor 11 is the main control unit of the entertainment host 10, and can schedule and control various modules in the entertainment host 10. In this embodiment, the microprocessor 11 uses an 8295 chip; in other embodiments, the microprocessor 11 can also use other types of automotive chips on the market.

[0044] The audio decoding module 12 includes a decoding chip. The audio decoding module 12 relies on the decoding chip to perform audio decoding. The decoding chip can be a decoding chip of the AU7850 model, or other types of decoding chips on the market. In other embodiments, the audio decoding module 12 can also be built into the microprocessor 11, that is, the audio decoding function is performed by the corresponding functional module inside the 8295 chip.

[0045] The audio decomposition module 13 is built into the microprocessor 11, that is, the audio decomposition function is executed by the corresponding functional module inside the microprocessor 11 (8295 chip).

[0046] The first A2B interface module 14, the third A2B interface module 15, the second A2B interface module 21 and the fourth A2B interface module 22 all include an audio interface chip of the AD2428 model. The first A2B interface module 14 is paired with the second A2B interface module 21, and the third A2B interface module 15 is paired with the fourth A2B interface module 22. The A2B (Automotive Audio Bus) link is used to realize the audio signal transmission between the entertainment host 10 and the power amplifier 20, and the audio transmission performance is reliable, thereby ensuring the stability of the audio transmission.

[0047] The sound effect processing module 24 includes a DSP chip of model ADSP21593. The DSP chip of model ADSP21593 has a dual-core 2G computing power, and the sound effect algorithm is processed faster, which can achieve a delay of milliseconds, thereby reducing signal transmission delay and ensuring the fluency of real-time audio applications.

[0048] The audio synthesis module 23 is built into the sound effect processing module 24, that is, the audio synthesis function is executed by the corresponding functional module inside the sound effect processing module 24 (DSP chip of ADSP21593).

[0049] The audio amplifier module 25 includes an audio power amplifier chip of model FDA801. The audio amplifier module 25 mainly relies on the audio power amplifier chip to amplify the power of the audio signal.

[0050] The speaker group 30 includes a tweeter, a midrange speaker, and a woofer. To meet the bit rate requirements of Hi-Res audio, the upper limit of the sound frequency output by the tweeter is 40KHz, and the lower limit of the sound frequency output by the woofer is f2≥35KHz. There is a large gap between the upper limit of the sound frequency output by the tweeter and the lower limit of the sound frequency output by the woofer. In this way, the output sound frequency has a wider dynamic range and the overall acoustic experience is better.

[0051] The entertainment host 10 also includes a Bluetooth interface module 16, which is connected to the microprocessor 11. The Bluetooth interface module 16 can be connected to a smart mobile terminal such as a mobile phone or a tablet for receiving a sound source from the smart mobile terminal.

[0052] The working process of the vehicle audio system of the utility model is as follows:

[0053] First, prepare the audio source to be played. The audio source can be downloaded to the entertainment host 10 through online apps installed in the entertainment host 10, such as QQ Music, NetEase Cloud, Sony Music, etc., or input into the entertainment host 10 through a DVD player, CD player, SD card, etc. It can also be transmitted to the entertainment host 10 from smart mobile terminals such as mobile phones and tablets via wireless Bluetooth.

[0054] Secondly, the audio decoding module 12 in the entertainment host 10 decodes the sound source to be played to obtain the corresponding audio signal. If the sampling rate of the sound source to be played is greater than 48kHz and less than or equal to 96kHz, the audio decoding module 12 obtains a first sampling rate audio signal after decoding, and the audio decomposition module 13 compresses and decomposes the first sampling rate audio signal into two third sampling rate audio signals, and sends the two third sampling rate audio signals compressed and decomposed by the audio decomposition module 13 to the power amplifier 20 through the first A2B interface module 14; if the sampling rate of the sound source to be played is less than or equal to 48kHz, the audio decoding module 12 obtains a second sampling rate audio signal after decoding, and the third A2B interface module 15 directly sends the second sampling rate audio signal decoded by the audio decoding module 12 to the power amplifier 20.

[0055] Finally, the power amplifier 20 receives the audio signal from the entertainment host 10 through the second A2B interface module 21 or the fourth A2B interface module 22 . If the second A2B interface module 21 receives two third sampling rate audio signals sent from the first A2B interface module 14, the audio synthesis module 23 synthesizes the two third sampling rate audio signals into one first sampling rate audio signal, and the sound effect processing module 24 performs sound effect algorithm processing on the one first sampling rate audio signal, and then the audio amplification module 25 performs power amplification processing (provides sufficient power) on the one first sampling rate audio signal processed by the sound effect algorithm and outputs it to the speaker group 30, driving the speaker group 30 to play strong and high-definition sound effects, bringing more music details, more sound thickness, delicacy, depth, and sound pressure level, and achieving ultimate music restoration; if the fourth A2B interface module 22 receives a second sampling rate audio signal from the third A2B interface module 15, the sound effect processing module 24 directly performs sound effect algorithm processing on the one second sampling rate audio signal, and then the audio amplification module 25 performs power amplification processing on the one second sampling rate audio signal processed by the sound effect algorithm and outputs it to the speaker group 30, driving the speaker group 30 to play music.

[0056] In the vehicle audio system of the embodiment of the utility model, the entertainment host compresses and decomposes the first sampling rate audio signal obtained by decoding the sound source into two third sampling rate audio signals through the internal audio decomposition module and transmits them to the power amplifier. The power amplifier synthesizes the two received third sampling rate audio signals into one first sampling rate audio signal through the internal audio synthesis module, which can ensure the consistent restoration of the audio sampling rate and ensure the high-fidelity transmission of the audio signal, so that the vehicle audio system supports the restoration of high sampling rate sound sources, ensures the high-quality sound, brings more music details, more sound thickness, delicacy, depth, sound pressure level to users, and realizes the ultimate music restoration; the vehicle audio system supports the restoration of sound sources with a sampling rate greater than 48kHz and less than or equal to 96kHz, and supports the restoration of sound sources with a sampling rate less than or equal to 48kHz, and supports multiple audio formats at the same time, with strong compatibility; The A2B link is used to realize the audio signal transmission between the entertainment host and the power amplifier. The A2B link has a reliable transmission medium and error correction mechanism, and the audio transmission performance is reliable, thereby ensuring stable audio transmission; the sound effect processing module uses the ADSP21593 DSP chip to process the audio signal. The dual-core 2G computing power of the ADSP21593 DSP chip makes the sound effect algorithm process faster, and can achieve millisecond delay, thereby reducing signal transmission delay and ensuring the smoothness of real-time audio applications; the upper limit of the sound frequency output by the tweeter is 40KHz, and the lower limit of the sound frequency output by the woofer is f2≥35KHz. There is a large gap between the upper limit of the sound frequency output by the tweeter and the lower limit of the sound frequency output by the woofer. In this way, the output sound frequency has a wider dynamic range and the overall acoustic experience is better.

[0057] The utility model also provides a car, which comprises the above-mentioned car-mounted audio system.

[0058] The above description is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the utility model.

Claims

1. A vehicle audio system, characterized in that: Including entertainment host, amplifier and speaker group, The entertainment host includes a microprocessor, an audio decoding module, an audio decomposition module and a first A2B interface module. The audio decoding module, the audio decomposition module and the first A2B interface module are respectively connected to the microprocessor. The audio decoding module is used to decode the sound source to obtain one channel of audio signal. The audio decomposition module is used to compress and decompose the decoded one channel of audio signal into two channels of audio signals. The first A2B interface module is used to send the two channels of audio signals compressed and decomposed by the audio decomposition module to the power amplifier. The power amplifier includes a second A2B interface module, an audio synthesis module, a sound effect processing module and an audio amplification module, wherein the second A2B interface module is used to receive two-way audio signals from the first A2B interface module, the audio synthesis module is used to synthesize the two-way audio signals received by the second A2B interface module into one-way audio signal, the sound effect processing module is used to perform sound effect algorithm processing on one-way audio signal from the audio synthesis module, and the audio amplification module is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and then output it to the speaker group; The speaker group is connected to the audio amplifier module and is used to output sound effects under the control of the output signal of the audio amplifier module.

2. The vehicle audio system according to claim 1, characterized in that: The audio decoding module is used to decode the sound source to obtain a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module is used to compress and decompose the first sampling rate audio signal into two third sampling rate audio signals, and the first A2B interface module is used to send the second sampling rate audio signal or the two third sampling rate audio signals to the power amplifier; The second A2B interface module is used to receive one channel of second sampling rate audio signal or two channels of third sampling rate audio signals from the first A2B interface module, the audio synthesis module is used to synthesize the two channels of third sampling rate audio signals received by the second A2B interface module into one channel of first sampling rate audio signal, the sound effect processing module is used to perform sound effect algorithm processing on one channel of first sampling rate audio signal from the audio synthesis module or one channel of second sampling rate audio signal from the second A2B interface module, and the audio amplification module is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and then output it to the speaker group.

3. The vehicle audio system according to claim 1, wherein: The entertainment host also includes a third A2B interface module connected to the microprocessor, the audio decoding module is used to decode the sound source to obtain a first sampling rate audio signal or a second sampling rate audio signal, the audio decomposition module is used to compress and decompose the first sampling rate audio signal into two third sampling rate audio signals, the first A2B interface module is used to send the two third sampling rate audio signals to the power amplifier, and the third A2B interface module is used to send the second sampling rate audio signal to the power amplifier; The power amplifier also includes a fourth A2B interface module, the second A2B interface module is used to receive two third sampling rate audio signals from the first A2B interface module, the audio synthesis module is used to synthesize the two third sampling rate audio signals received by the second A2B interface module into one first sampling rate audio signal, the fourth A2B interface module is used to receive one second sampling rate audio signal from the third A2B interface module, the sound effect processing module is used to perform sound effect algorithm processing on one first sampling rate audio signal from the audio synthesis module or one second sampling rate audio signal from the fourth A2B interface module, and the audio amplification module is used to perform power amplification processing on the audio signal processed by the sound effect algorithm and then output it to the speaker group.

4. The vehicle audio system according to claim 2 or 3, characterized in that: The sampling rate f1 of the first sampling rate audio signal has a value range of 48kHz<f1≤96kHz; the sampling rate f2 of the second sampling rate audio signal has a value range of 48kHz≤48kHz.

5. The vehicle audio system according to claim 4, characterized in that: The sampling rate of the third sampling rate audio signal is f3=f1 / 2.

6. The vehicle audio system according to claim 1, wherein: The audio decomposition module is built in the microprocessor, and the audio synthesis module is built in the sound effect processing module.

7. The vehicle audio system according to claim 1, wherein: The speaker group includes a tweeter, a midrange speaker and a woofer; the upper limit of the sound frequency output by the tweeter is 40KHz; the lower limit of the sound frequency output by the woofer is f2≥35KHz.

8. The vehicle audio system according to claim 1, wherein: The entertainment host also includes a Bluetooth interface module, and the Bluetooth interface module is connected to the microprocessor.

9. A car, characterized in that: The automobile comprises the vehicle audio system as described in any one of claims 1-8.

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