CN203251418U - Audio frequency processing system for vehicle-mounted sound equipment - Google Patents
Audio frequency processing system for vehicle-mounted sound equipment Download PDFInfo
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- CN203251418U CN203251418U CN 201320269733 CN201320269733U CN203251418U CN 203251418 U CN203251418 U CN 203251418U CN 201320269733 CN201320269733 CN 201320269733 CN 201320269733 U CN201320269733 U CN 201320269733U CN 203251418 U CN203251418 U CN 203251418U
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Abstract
The embodiment of the utility model provides an audio frequency processing system for vehicle-mounted sound equipment. The system comprises a microcontroller MCU for outputting work instructions, and a TAS3308 audio frequency digital signal processor DSP connected with the MCU, and for receiving input external audio signals and the work instructions output by the MCU, carry outing audio frequency processing on the audio signals according to the work instructions and outputting the processed audio signals. The audio frequency processing system for vehicle-mounted sound equipment provided by the embodiment of the utility model realizes application of the audio frequency processing system for vehicle-mounted sound equipment to vehicle bodies of different models.
Description
Technical field
The utility model relates to the audio signal processing technique field, more particularly, relates to a kind of vehicle audio audio frequency processing system.
Background technology
Vehicle audio refers to be loaded on the vehicle body of the vehicles such as automobile, motor, can carry out audio frequency to the voice signal of the output of the audio-source on the vehicle body processes, and the stereo set of the audio frequency after the playback process, wherein in the vehicle audio audio signal is carried out the part that audio frequency processes and be called the vehicle audio audio frequency processing system.
At present a lot of vehicle audio audio frequency processing systems are to use traditional audio process that audio signal is carried out audio frequency to process, the audio process of this quasi-tradition, it is the audio signal of using analog circuitry processes input sound equipment, because most circuit parameters of analog circuit are fixed, accordingly, adjustable channel parameters seldom, the precision of adjusting, scope and flexibility ratio all are very limited, so the vehicle audio audio frequency processing system of this class can not well adapt to different automobile types.As seen, existing vehicle audio audio frequency processing system can only adaptive fixing vehicle, can't be suitable between the vehicle body of different automobile types.
The utility model content
In view of this, the utility model embodiment provides a kind of vehicle audio audio frequency processing system, the problem that can't be suitable between the vehicle body of different automobile types to solve existing vehicle audio audio frequency processing system.
For achieving the above object, the utility model embodiment provides following technical scheme:
A kind of vehicle audio audio frequency processing system comprises:
The microcontroller of output services instruction;
Link to each other with described MCU, receive the audio signal of extraneous input, and the work order of described MCU output, according to described work order described audio signal is carried out audio frequency and process, the TAS3308 audio digital signal processor DSP of the audio signal after output is processed.
Wherein, described TAS3308 audio frequency DSP comprises:
The input pin of the simulated audio signal of audio reception source output;
Link to each other the first audio selector that the described work order of foundation is selected the simulated audio signal of audio-source output with described input pin;
Link to each other the second audio selector that the described work order of foundation is selected the simulated audio signal of audio-source output with described input pin;
Link to each other with described the first audio selector or described the second audio selector, described the first audio selector or the selected simulated audio signal of described the second audio selector are converted to the first digital audio and video signals, export the analog to digital converter of described the first digital audio and video signals;
Receive the second digital audio and video signals of extraneous input, export the digital audio and video signals input interface of described the second digital audio and video signals;
Link to each other with described digital audio and video signals input interface with described analog to digital converter respectively, receive described the first digital audio and video signals and described the second digital audio and video signals, the DSP circuit of described the first digital audio and video signals and described the second digital audio and video signals being processed according to described work order;
Link to each other with described DSP circuit, export the audio output interface of the audio signal after the described DSP processing of circuit.
Wherein, described analog to digital converter links to each other with described the first audio selector or described the second audio selector by the line switching with single-pole double throw function.
Wherein, described audio output interface comprises:
The digital audio and video signals output interface that links to each other with described DSP circuit; And/or,
With the pulse width modulation (PWM) audio output interface that described DSP circuit links to each other, the audio signal of described PWM audio output interface after with the described DSP processing of circuit of the formal output of pwm signal.
Wherein, described audio output interface also comprises:
Link to each other with described the first audio selector or described the second audio selector, with the simulated audio signal output interface of described the first audio selector or the selected simulated audio signal output of described the second audio selector.
Wherein, described system also comprises:
The microprocessor MPU of output simulated audio signal;
Link to each other with described digital audio and video signals input interface with described MPU respectively, the simulated audio signal of described MPU output is converted to the second digital audio and video signals, described the second digital audio and video signals is inputted the modulus conversion chip of described digital audio and video signals input interface.
Wherein, described the second digital audio and video signals is the signal of I2S data format, and described work order is the instruction of I2C data format.
Wherein, described PWM audio output interface is three road PWM audio output interfaces.
Wherein, described the first audio selector or described the second audio selector are that 10 select 1 stereo audio selector.
Wherein, described system also comprises:
Link to each other with described TAS3308 audio frequency DSP, the audio signal of described TAS3308 audio frequency DSP output is carried out the filter amplification circuit of filter and amplification.
Based on technique scheme, the vehicle audio audio frequency processing system that the utility model embodiment provides by the working method of MCU control TAS3308 audio frequency DSP, uses TAS3308 audio frequency DSP that audio signal is carried out audio frequency and processes, audio signal after output is processed has realized the vehicle audio function.Compare the prior art of using the analog circuitry processes audio signal, the utility model embodiment uses TAS3308 audio frequency DSP audio signal, can be so that the adjustable range of each channel parameters be wider, precision is higher, the user can also adjust the parameter of each output channels more easily, so that the scope of the vehicle that the vehicle audio audio frequency processing system can be suitable for becomes large, solved the problem that existing vehicle audio audio frequency processing system can't be suitable between the vehicle body of different automobile types.The vehicle audio audio frequency processing system that the utility model embodiment provides has been realized vehicle audio audio frequency processing system being suitable between the vehicle body of different automobile types.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the vehicle audio audio frequency processing system that Fig. 1 provides for the utility model embodiment;
The structural representation of the TAS3308 audio frequency DSP that Fig. 2 provides for the utility model embodiment;
The structural representation of the audio output interface that Fig. 3 provides for the utility model embodiment;
Another structural representation of the audio output interface that Fig. 4 provides for the utility model embodiment;
Another structural representation of the vehicle audio audio frequency processing system that Fig. 5 provides for the utility model embodiment;
The another structural representation of the vehicle audio audio frequency processing system that Fig. 6 provides for the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The structural representation of the vehicle audio audio frequency processing system that Fig. 1 provides for the utility model embodiment, with reference to Fig. 1, this audio frequency processing system can comprise: MCU(Micro Control Unit, microcontroller) 1 and TAS3308 audio frequency DSP(Digital Signal Processor, digital signal processor) 2.
Wherein, MCU1 is used for the output services instruction to TAS3308 audio frequency DSP2, with the mode of operation of control TAS3308 audio frequency DSP2; TAS3308 audio frequency DSP2 is used for receiving the work order of MCU1 output, and the audio signal of the extraneous input of reception TAS3308 audio frequency DSP2, the audio signal of extraneous input can comprise simulated audio signal and/or the digital audio numeral of external device input, after the audio signal that receives this work order and extraneous input, TAS3308 audio frequency DSP2 carries out audio frequency according to this work order to the audio signal that receives from the external world processes the audio signal after output is processed.
The vehicle audio audio frequency processing system that the utility model embodiment provides, working method by MCU control TAS3308 audio frequency DSP, use TAS3308 audio frequency DSP that audio signal is carried out audio frequency and process, the audio signal after output is processed has realized the vehicle audio function.Compare the prior art of using the analog circuitry processes audio signal, the utility model embodiment uses TAS3308 audio frequency DSP audio signal, can be so that the adjustable range of each channel parameters be wider, precision is higher, the user can also adjust the parameter of each output channels more easily, so that the scope of the vehicle that the vehicle audio audio frequency processing system can be suitable for becomes large, solved the problem that existing vehicle audio audio frequency processing system can't be suitable between the vehicle body of different automobile types.The vehicle audio audio frequency processing system that the utility model embodiment provides has been realized vehicle audio audio frequency processing system being suitable between the vehicle body of different automobile types.
The structural representation of the TAS3308 audio frequency DSP that Fig. 2 provides for the utility model embodiment, with reference to Fig. 2, TAS3308 audio frequency DSP2 can comprise: input pin 21, the first audio selector 22, the second audio selector 23, analog to digital converter 24, digital audio and video signals input interface 25, DSP circuit 26, audio output interface 27.
Wherein, input pin 21 is in order to the simulated audio signal of audio reception source output;
Audio-source can be DVD, radio reception module, 3G communication module, MPU(Microprocessor Unit, microprocessor) etc. equipment that can output audio, the audio frequency output of these audio source device is connected on the input pin 21 of TAS3308 audio frequency DSP2, thereby realizes that the simulated audio signal of audio-source is to the input of TAS3308 audio frequency DSP2; Optionally, the audio frequency exported of audio-source can be stereo audio.
The first audio selector 22 links to each other with input pin 21, is used for according to the work order of MCU1 output the simulated audio signal of audio-source output being selected;
The second audio selector 23 links to each other with input pin 21, is used for according to the work order of MCU1 output the simulated audio signal of audio-source output being selected;
Can find out that the first audio selector 22 all links to each other with input pin 21 with the second audio selector 23, all for the work order according to MCU1 output the simulated audio signal of audio-source output be selected; Although the utility model embodiment has two audio selectors that can carry out audio selection, but the utility model embodiment only selects the inside of the selected audio frequency input of one of them audio selector TAS3308 audio frequency DSP2, specifying information for audio frequency to be selected can by the work order carrying of MCU1 output, namely be selected the inside of the selected audio frequency input of which audio selector TAS3308 audio frequency DSP2 by MCU1 control;
Optionally, the first audio selector 22 and the second audio selector 23 can be the stereo audio selectors, are chosen as 10 and select 1 stereo audio selector.
Because the utility model embodiment only selects a selected audio frequency of audio selector in the first audio selector 22 and the second audio selector 23, the inside of input TAS3308 audio frequency DSP2; Therefore 24 of analog to digital converters link to each other with selecteed audio selector in the second audio selector 23 with the first audio selector 22, and the continuous selected simulated audio signal of audio selector is converted to the first digital audio and video signals; Be that analog to digital converter 24 links to each other with the first audio selector 22 or the second audio selector 23, accordingly, the first audio selector 22 or the second audio selector 23 selected simulated audio signals are converted to the first digital audio and video signals, export this first digital audio and video signals.It should be noted that the first digital audio and video signals does not refer in particular to, in the utility model embodiment, only represent the digital audio and video signals after analog to digital converter 24 is with the first audio selector 22 or the 23 selected simulated audio signal conversions of the second audio selector;
Optionally, analog to digital converter 24 can link to each other with the first audio selector 22 or the second audio selector 23 by the line switching with single-pole double throw function, thereby the realization 24 same times of analog to digital converter only link to each other with an audio selector, only a selected simulated audio signal of audio selector are carried out analog-to-digital conversion.
Digital audio and video signals input interface 25 is used for receiving the second digital audio and video signals of extraneous input, and exports this second digital audio and video signals;
The second digital audio and video signals does not refer in particular in the utility model embodiment, only is used for the digital audio and video signals that representative digit audio input interface 25 receives; The second digital audio and video signals can be the audio signal of arbitrarily external equipment input TAS3308 audio frequency DSP2, be chosen as the simulated audio signal of MPU output after outside modulus conversion chip carries out analog-to-digital conversion, the digital audio and video signals of input digital audio signal input interface 25.
Optionally, 26 pairs of two-way digital audio and video signals (the first digital audio and video signals of DSP circuit, the second digital audio and video signals) do a series of processing after, can be with the audio signal after processing with PWM(Pulse Width Modulation, pulse width modulation) formal output.Corresponding, the structure of audio output interface 27 can as shown in Figure 3, comprise: PWM audio output interface 271,
PWM audio output interface 271 links to each other with DSP circuit 26, is used for the audio signal after formal output DSP circuit 26 processing of pwm signal.Optionally, the PWM audio output interface can be three road PWM audio output interfaces, is chosen as the stereo output interface of three road PWM.
Optionally, the audio signal after the formal output DSP circuit 26 of audio output interface 27 all right digital audio and video signals is processed.Another structural representation of the audio output interface 27 that Fig. 4 provides for the utility model embodiment, audio output interface 27 can comprise: the digital audio and video signals output interface 272 that links to each other with DSP circuit 26.
Obviously, audio output interface 27 shown in Figure 4 can have PWM audio output interface 271.
Optionally, MCU1 also can control the interior selected audio frequency of arbitrary audio selector of TAS3308 audio frequency DSP2 without any processing, and directly from the output interface output of TAS3308 audio frequency DSP2, the backstage audio frequency as system behind filter and amplification is exported.Corresponding, audio output interface 27 can also comprise: link to each other with the first audio selector 22 or the second audio selector 23, with the simulated audio signal output interface (not shown) of the first audio selector 22 or the 23 selected simulated audio signal outputs of the second audio selector.
Optionally, the second digital audio and video signals can for the simulated audio signal of MPU output after outside modulus conversion chip carries out analog-to-digital conversion, the digital audio and video signals of input digital audio signal input interface 25.Corresponding, another structural representation of the vehicle audio audio frequency processing system that Fig. 5 provides for the utility model embodiment, in conjunction with Fig. 1, Fig. 2 and shown in Figure 5, audio frequency processing system can also comprise: MPU3, and modulus conversion chip 4.
Wherein, MPU3 output simulated audio signal is to modulus conversion chip 4;
Optionally, the second digital audio and video signals can be the signal of I2S data format, and the work order of MCU1 output can be the instruction of I2C data format.
The another structural representation of the vehicle audio audio frequency processing system that Fig. 6 provides for the utility model embodiment, in conjunction with Fig. 5 and shown in Figure 6, audio frequency processing system can also comprise: filter amplification circuit 5;
The vehicle audio audio frequency processing system that the utility model embodiment provides has been realized vehicle audio audio frequency processing system being suitable between the vehicle body of different automobile types.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a vehicle audio audio frequency processing system is characterized in that, comprising:
The microcontroller of output services instruction;
Link to each other with described MCU, receive the audio signal of extraneous input, and the work order of described MCU output, according to described work order described audio signal is carried out audio frequency and process, the TAS3308 audio digital signal processor DSP of the audio signal after output is processed.
2. system according to claim 1 is characterized in that, described TAS3308 audio frequency DSP comprises:
The input pin of the simulated audio signal of audio reception source output;
Link to each other the first audio selector that the described work order of foundation is selected the simulated audio signal of audio-source output with described input pin;
Link to each other the second audio selector that the described work order of foundation is selected the simulated audio signal of audio-source output with described input pin;
Link to each other with described the first audio selector or described the second audio selector, described the first audio selector or the selected simulated audio signal of described the second audio selector are converted to the first digital audio and video signals, export the analog to digital converter of described the first digital audio and video signals;
Receive the second digital audio and video signals of extraneous input, export the digital audio and video signals input interface of described the second digital audio and video signals;
Link to each other with described digital audio and video signals input interface with described analog to digital converter respectively, receive described the first digital audio and video signals and described the second digital audio and video signals, the DSP circuit of described the first digital audio and video signals and described the second digital audio and video signals being processed according to described work order;
Link to each other with described DSP circuit, export the audio output interface of the audio signal after the described DSP processing of circuit.
3. system according to claim 2 is characterized in that, described analog to digital converter links to each other with described the first audio selector or described the second audio selector by the line switching with single-pole double throw function.
4. system according to claim 2 is characterized in that, described audio output interface comprises:
The digital audio and video signals output interface that links to each other with described DSP circuit; And/or,
With the pulse width modulation (PWM) audio output interface that described DSP circuit links to each other, the audio signal of described PWM audio output interface after with the described DSP processing of circuit of the formal output of pwm signal.
5. system according to claim 4 is characterized in that, described audio output interface also comprises:
Link to each other with described the first audio selector or described the second audio selector, with the simulated audio signal output interface of described the first audio selector or the selected simulated audio signal output of described the second audio selector.
6. each described system is characterized in that according to claim 2-5, also comprises:
The microprocessor MPU of output simulated audio signal;
Link to each other with described digital audio and video signals input interface with described MPU respectively, the simulated audio signal of described MPU output is converted to the second digital audio and video signals, described the second digital audio and video signals is inputted the modulus conversion chip of described digital audio and video signals input interface.
7. each described system is characterized in that according to claim 2-5, and described the second digital audio and video signals is the signal of I2S data format, and described work order is the instruction of I2C data format.
8. system according to claim 4 is characterized in that, described PWM audio output interface is three road PWM audio output interfaces.
9. each described system is characterized in that according to claim 2-5, and described the first audio selector or described the second audio selector are that 10 select 1 stereo audio selector.
10. system according to claim 1 is characterized in that, also comprises:
Link to each other with described TAS3308 audio frequency DSP, the audio signal of described TAS3308 audio frequency DSP output is carried out the filter amplification circuit of filter and amplification.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269733 CN203251418U (en) | 2013-05-17 | 2013-05-17 | Audio frequency processing system for vehicle-mounted sound equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320269733 CN203251418U (en) | 2013-05-17 | 2013-05-17 | Audio frequency processing system for vehicle-mounted sound equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913865A (en) * | 2016-04-26 | 2016-08-31 | 深圳市航盛电子股份有限公司 | Vehicle mounted sound equipment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913865A (en) * | 2016-04-26 | 2016-08-31 | 深圳市航盛电子股份有限公司 | Vehicle mounted sound equipment system |
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Granted publication date: 20131023 |