CN104244165A - Method using vehicle-mounted sound effect chip for achieving sound mixing function and vehicle-mounted sound mixing circuit - Google Patents
Method using vehicle-mounted sound effect chip for achieving sound mixing function and vehicle-mounted sound mixing circuit Download PDFInfo
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- CN104244165A CN104244165A CN201410440634.9A CN201410440634A CN104244165A CN 104244165 A CN104244165 A CN 104244165A CN 201410440634 A CN201410440634 A CN 201410440634A CN 104244165 A CN104244165 A CN 104244165A
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Abstract
The invention relates to a method using a vehicle-mounted sound effect chip for achieving the sound mixing function. The method comprises the steps that a main sound source is input through an input port of a first voice frequency signal source; input configuration of the main sound source is selected through a main controller; sound effect processing is carried out on the main sound source; a first voice gain adjuster is used for carrying out gain adjustment on the volume of the main sound source, and transmitting the volume to a sound mixing device; a mixed sound source is input through an input port of a second voice frequency signal source; input configuration of the mixed sound source is selected through a channel selector; a second voice gain adjuster is used for carrying out gain adjustment on the volume of the mixed sound source; a first voice frequency signal output port is used for inputting the mixed sound source into the vehicle-mounted sound-effect chip again through an input port of a third voice frequency signal source; input configuration of the mixed sound source is selected through a mixed sound selector, and transmitted to the sound mixing device, and the sound mixing device is used for outputting sounds after mixing the sounds of the main sound source and the mixed sound source. The invention further relates to a vehicle-mounted sound mixing circuit. According to the method, the volume of the mixed sound source can be adjusted to be lower.
Description
Technical field
The present invention relates to vehicle mounted multimedia technology, particularly relate to a kind of method using vehicle-mounted sound chip to realize sound mixing function, also relate to a kind of vehicle-mounted mixer circuit.
Background technology
In vehicle-mounted video and music entertainment system, generally all there is navigation sound mixing function.Namely, in the process of multimedia audio-video broadcasting, the report of navigation speech is inserted.Navigation audio mixing has two kinds of modes, and a kind of is when there being navigation speech, stops present multimedia playing, and source of sound is switched to navigation speech and reports, and treat that navigation speech is reported and terminate, system is switchback multimedia passage again.Also having a kind of is when having navigation speech, chooses multimedia passage and navigation speech to report the voice output of passage, the volume of decay present multimedia simultaneously, improve the volume of navigation speech, treat that navigation speech is reported to terminate, then recover the volume of multimedia, close the voice of navigation.Wherein the latter is real audio mixing mode.
The vehicle-mounted sound chip of TDA7719, TDA7729 series of STMicroelectronics company supports above-mentioned two kinds of audio mixing modes, but supports there is limitation to the latter, can not meet design requirement completely.One of them problem is to be limited in 0 ~-31DB to the gain-adjusted of audio mixing passage, and when multimedia and navigation speech are selected into audio mixing passage time, the adjustable range of volume is less (-31DB output sound is also larger).
Summary of the invention
Based on this, being necessary to provide a kind of when there being two or more source of sound to input, being easy to user and acoustically clearly using vehicle-mounted sound chip to realize the method for sound mixing function two kinds of sources of sound differentiations.
Use vehicle-mounted sound chip to realize a method for sound mixing function, comprise the following steps: the first audio signal source input port input keynote source by described vehicle-mounted sound chip; Selected the input configuration in described keynote source by master selector under the control of configuration signal; Audio effect processing is carried out to have selected the keynote source after input configuration; Carry out gain-adjusted by the volume of the first sound fader to the keynote source after described audio effect processing, and transfer to mixer; The audio mixing source of sound carrying out audio mixing is needed by the second audio signal source input port input of described vehicle-mounted sound chip; Selected the input configuration of described audio mixing source of sound by direct channel selector or second channel selector under the control of described configuration signal; Gain-adjusted is carried out by the volume of the second sound fader to the audio mixing source of sound after described audio effect processing; Through the first Audio output port, the audio mixing source of sound after carrying out volume adjusting is inputted described vehicle-mounted sound chip again from the 3rd audio signal source input port; Under the control of described configuration signal, selected the input configuration of the audio mixing source of sound from the 3rd audio signal source input port input by audio mixing selector, and transfer to mixer; By mixer, audio mixing is carried out to keynote source and audio mixing source of sound; The audio signal after mixer audio mixing is exported by the second Audio output port.
Wherein in an embodiment, described configuration signal is I
2c bus signals.
Wherein in an embodiment, the model of described vehicle-mounted sound chip is TDA7719 or TDA7729.
Wherein in an embodiment, described first Audio output port is subwoofer output port.
There is a need to provide a kind of vehicle-mounted mixer circuit.
A kind of vehicle-mounted mixer circuit, comprise vehicle-mounted sound chip, described vehicle-mounted sound chip comprises the first audio signal source input port, second audio signal source input port, 3rd audio signal source input port, configuration signal input port, master selector, channel to channel adapter, audio effect processing module, first sound fader, second sound fader, first Audio output port, audio mixing selector, mixer and the second Audio output port, described first audio signal source input port, master selector, audio effect processing module, first sound fader connects successively, described second audio signal source input port, channel to channel adapter, second sound fader, first Audio output port connects successively, described first Audio output port is connected to described 3rd audio signal source input port through wire outside described vehicle-mounted sound chip, described 3rd audio signal source input port connects audio mixing selector, described audio mixing selector is all connected with described mixer with the first sound fader, and described mixer connects described second Audio output port, described first audio signal source input port is for inputting keynote source, described master selector is used for the input configuration selecting keynote source under the control of the configuration signal inputted by configuration signal input port, described audio effect processing module is used for carrying out audio effect processing to keynote source, described first sound fader is used for carrying out gain-adjusted to the volume in keynote source, described second audio signal source input port needs to carry out the audio mixing source of sound of audio mixing for inputting, described channel to channel adapter is used for the input configuration selecting described audio mixing source of sound under the control of described configuration signal, described second sound fader is used for carrying out gain-adjusted to the volume of described audio mixing source of sound, described first Audio output port is used for the audio mixing source of sound after Drazin inverse volume, and the audio mixing source of sound that described first Audio output port exports inputs described vehicle-mounted sound chip by wire again from described 3rd audio signal source input port, described audio mixing selector is used for the input configuration of the audio mixing source of sound selected under the control of described configuration signal from the 3rd audio signal source input port input, audio mixing is carried out in the keynote source that described mixer is used for audio mixing source of sound next for the transmission of audio mixing selector and the transmission of the first sound fader come, described second Audio output port is for exporting the audio signal after mixer audio mixing.
Wherein in an embodiment, described channel to channel adapter is direct channel selector and/or second channel selector.
Wherein in an embodiment, described audio effect processing module comprises loud assembly, soft assembly, volume assembly, high pitch assembly, middle pitch assembly and bass assembly.
Wherein in an embodiment, described configuration signal input port is I
2c bus interface.
Wherein in an embodiment, the model of described vehicle-mounted sound chip is TDA7719 or TDA7729.
Wherein in an embodiment, described first Audio output port is 16 pin and 17 pin of vehicle-mounted sound chip, and described second Audio output port is 18 pin to 21 pin of vehicle-mounted sound chip; Described first audio signal source input port and the second audio signal source input port are two pin in 1 pin to 11 pin of vehicle-mounted sound chip, and described 3rd audio signal source input port is 12 pin and 13 pin of vehicle-mounted sound chip.
Above-mentioned vehicle-mounted mixer circuit, by the first Audio output port is directly taken back the second audio signal source input port with wire, makes need the audio signal of audio mixing can flow through acoustic gain adjuster thus carry out wider volume adjusting.Carry out by mixer the conventional art that audio mixing can only realize volume adjusting among a small circle relative to direct, can the gap of mutual for the source of sound of audio mixing volume be drawn larger, be easy to user and acoustically, source of sound distinguished clear.
Accompanying drawing explanation
Fig. 1 uses vehicle-mounted sound chip to realize the flow chart of the method for sound mixing function in one embodiment;
Fig. 2 is the structural representation of vehicle-mounted mixer circuit in an embodiment;
Fig. 3 is the structural representation adopting vehicle-mounted mixer circuit in the embodiment of TDA7719 as vehicle-mounted sound chip.
Embodiment
For enabling object of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Fig. 1 uses vehicle-mounted sound chip to realize the flow chart of the method for sound mixing function in one embodiment, wherein step S110 ~ S150 and step S210 ~ 260 are two groups of separate flow processs, do not perform requirement successively between the step of the step in set of process and another set of process.Below each step is specifically introduced:
S110, by the first audio signal source input port input keynote source of vehicle-mounted sound chip.
The vehicle-mounted sound chip used comprises multiple audio signal source input port, using wherein at least one as the first audio signal source input port, inputs keynote source for step S110.In the present embodiment, the keynote source of input is multimedia audio signal.
S120, selects the input configuration in keynote source by master selector.
Each audio signal source input port of vehicle-mounted sound chip is configured to be suitable for different application, is controlled the input configuration of each audio signal source input port by configuration signal.Particularly, the configuration of audio signal source input port comprises the input of accurate differential (Quasi-Differential, QD), single-ended (Single-ended input) input, fully differential (Full Differential) input, monophony difference (mono Differential) input.Under the control of configuration signal, be that the first audio signal source input port chooses wherein a kind of configuration by master selector.In the present embodiment, configuration signal is I
2c bus signals.
S130, carries out audio effect processing to keynote source.
After choosing input configuration, in the present embodiment keynote source is comprised to the audio effect processing of loudness (Loudness), soft quiet (Softmute), volume (Volume), high pitch (Treble), middle pitch (Middle), bass (Bass).
S140, carries out gain-adjusted by the volume of the first sound fader to the keynote source after described audio effect processing.
Vehicle-mounted sound chip comprises multiple acoustic gain adjuster (Mono Fader), being regulated by least one acoustic gain adjuster wherein after the audio effect processing of step S130 completes and gain-adjusted is carried out to the volume in keynote source, being called the first sound fader by regulating the acoustic gain adjuster of keynote source volume in this step.The Signal Regulation scope of acoustic gain adjuster is-79 ~ 0 decibel.
S150, transfers to mixer by keynote source.
After having regulated volume, keynote source is transferred to mixer by the first sound fader.
S210, needs by the second audio signal source input port input of vehicle-mounted sound chip the audio mixing source of sound carrying out audio mixing.
Using vehicle-mounted sound chip at least one audio signal source input port wherein as the second audio signal source input port, need for step S210 input the audio mixing source of sound carrying out audio mixing.In the present embodiment, the audio mixing source of sound of input is navigation speech signal.
S220, selects the input configuration of audio mixing source of sound by channel to channel adapter.
The input configuration selection of audio mixing source of sound is carried out equally by configuration signal control channel selector.In the present embodiment, channel to channel adapter is direct channel selector (Direct Path) and/or second channel selector (Rear Selector).That is, except the audio signal source input port that direct channel selector can be selected corresponding is as except the second audio signal source input port, the audio signal source input port that second channel selector can also be selected corresponding is as the second audio signal source input port.
S230, carries out gain-adjusted by the second sound fader to the volume of audio mixing source of sound.
To the acoustic gain adjuster of audio mixing source of sound volume be regulated in this step to be called the second sound fader, selecting can using the acoustic gain adjuster of audio signal transmission to the first Audio output port as the second sound fader.
S240, again inputs vehicle-mounted sound chip by audio mixing source of sound from the 3rd audio signal source input port through the first Audio output port.
First Audio output port is connected to the 3rd audio signal source input port by wire.In the present embodiment, select subwoofer output port as the first Audio output port.Subwoofer output port comprises L channel and R channel two ports, is connected on two audio signal source input ports one to one, and these two audio signal source input ports are called the 3rd audio signal source input port.In other embodiments, also other Audio output port can be selected as the first Audio output port, such as when user only needs the audio frequency after front stall loudspeaker output audio mixing, can input configuration be adjusted, after selecting the Audio output port of back seat to be exported by audio mixing source of sound, again input vehicle-mounted sound chip from the 3rd audio signal source input port.
S250, selects the input configuration of audio mixing source of sound by audio mixing selector.
Control audio mixing selector (Mix Selector) by configuration signal equally to carry out selecting from the input configuration of the audio mixing source of sound of the 3rd audio signal source input port input.
S260, transfers to mixer by audio mixing source of sound.
There is an attenuator (attenuator) rear end of audio mixing selector, and audio mixing source of sound carries out volume adjusting by attenuator before audio mixing, but its adjustable range is only-31 ~ 0 decibel.But because audio mixing source of sound has carried out the volume gain adjustment that can be low to moderate-79 decibels by the second sound fader in step S230, therefore the gain-adjusted scope of audio mixing source of sound can be low to moderate-110 decibels.
S310, carries out audio mixing by mixer to keynote source and audio mixing source of sound.
The keynote source that mixer transmits step S150 and step S260 transmit audio mixing source of sound and carry out audio mixing.
S320, exports the audio signal after mixer audio mixing by the second Audio output port.
In the present embodiment, the quantity of the second Audio output port is 4, is first line left sound channel, first line right sound channel, player No.5's sound channel, back right sound channel respectively.If in other embodiments using two in first line left sound channel, first line right sound channel, player No.5's sound channel, back right sound channel as the first Audio output port, then using remaining two as the second Audio output port.
The vehicle-mounted sound chip of above-mentioned use realizes the method for sound mixing function, first the input configuration of audio mixing source of sound is selected by direct channel selector or second channel selector, make audio mixing source of sound can flow through acoustic gain adjuster and carry out volume adjusting, wire through being connected to audio signal source input port after exporting audio mixing source of sound from the first Audio output port again re-enters vehicle-mounted sound chip, selects input configuration and deliver to mixer and keynote source is carried out audio mixing and exports in the control of configuration signal by audio mixing selector.Gain-adjusted scope due to acoustic gain adjuster is-79 ~ 0 decibel, and the gain-adjusted scope of the attenuator of audio mixing selector rear end is-31 ~ 0 decibel, thus achieve minimum can down to the volume adjusting of-110 decibels.Only carry out by audio mixing selector the conventional art that an input configuration selection only can realize the volume adjusting being low to moderate-31 decibels relative to audio mixing source of sound, can the volume of audio mixing source of sound be adjusted to lower, the gap of keynote source and the mutual volume of audio mixing source of sound is drawn larger, being easy to user distinguishes clear by source of sound acoustically, meet the application demand of user under various scene.
Fig. 2 is the structural representation of vehicle-mounted mixer circuit in an embodiment, and its core is vehicle-mounted sound chip.Vehicle-mounted sound chip comprises the first audio signal source input port 111, second audio signal source input port 112, 3rd audio signal source input port (specifically comprising audio signal source input port 113 and audio signal source input port 114 in the embodiment depicted in figure 2), configuration signal input port 150, master selector 122, channel to channel adapter 123, audio effect processing module 130, first sound fader (specifically comprises acoustic gain adjuster 163 in embodiment illustrated in fig. 2, acoustic gain adjuster 164, acoustic gain adjuster 165, acoustic gain adjuster 166), second sound fader (specifically comprising acoustic gain adjuster 161 and sound fader 162 in embodiment illustrated in fig. 2), first Audio output port (embodiment illustrated in fig. 2 comprise R channel subwoofer output port 181 and L channel subwoofer output port 182), audio mixing selector 124, mixer (embodiment illustrated in fig. 2ly comprises mixer 171, mixer 172, mixer 173, mixer 174) and Audio output port (embodiment illustrated in fig. 2ly comprise front stall left channel audio signal output port 186, front stall right channel audio signal output port 185, back seat left channel audio signal output port 184, back seat right channel audio signal output port 183).First audio signal source input port 111, master selector 122, audio effect processing module 130, first sound fader connect successively.Second audio signal source input port 112, channel to channel adapter 123, second sound fader, the first Audio output port connect successively.Use wire outside vehicle-mounted sound chip, the first Audio output port is connected to the 3rd audio signal source input port, be in the embodiment depicted in figure 2 L channel subwoofer output port 182 is connected to audio signal source input port 113, R channel subwoofer output port 181 is connected to audio signal source input port 114.3rd audio signal source input port connects audio mixing selector 124, and audio mixing selector 124 is all connected with mixer with the first sound fader, and mixer connects the second Audio output port.Particularly, audio mixing selector 124 and mixer 171, mixer 172, mixer 173, mixer 174 all connects, acoustic gain adjuster 166 connects mixer 174, acoustic gain adjuster 165 connects mixer 173, acoustic gain adjuster 164 connects mixer 172, acoustic gain adjuster 163 connects mixer 171, mixer 171 connects back seat right channel audio signal output port 183, mixer 172 connects back seat left channel audio signal output port 184, mixer 173 connects front stall right channel audio signal output port 185, mixer 174 connects front stall left channel audio signal output port 186.
First audio signal source input port 111 is for inputting keynote source, the input configuration in keynote source selected by master selector 122 under the control of the configuration signal inputted by configuration signal input port 150, then carry out audio effect processing by audio effect processing module 130 pairs of keynote sources, then be transferred to mixer 171 ~ 174 after gain-adjusted being carried out to the volume in keynote source by the first sound fader.Second audio signal source input port 112 needs to carry out the audio mixing source of sound of audio mixing for inputting, channel to channel adapter 123 selects the input configuration of audio mixing source of sound under the control of configuration signal, exported by the first Audio output port after gain-adjusted being carried out to the volume of audio mixing source of sound by the second sound fader again, and the audio mixing source of sound that the first Audio output port exports inputs vehicle-mounted sound chip by wire again from the 3rd audio signal source input port, the input configuration of the audio mixing source of sound from the 3rd audio signal source input port input selected by audio mixing selector 124 under the control of configuration signal, then audio mixing source of sound is transferred to mixer, the keynote source first sound fader transmission come by mixer and audio mixing selector 124 transmit the audio mixing source of sound come and carry out audio mixing, the audio signal after mixer audio mixing is exported finally by the second Audio output port.In the present embodiment, channel to channel adapter 123 is direct channel selector and/or second channel selector.
In the present embodiment, the first Audio output port comprises R channel subwoofer output port 181 and L channel subwoofer output port 182.In other embodiments, other Audio output port also can be selected as the first Audio output port.Such as when user only needs the audio frequency after front stall loudspeaker output audio mixing, input configuration can be adjusted, after selecting the Audio output port of back seat to be exported by audio mixing source of sound, again input vehicle-mounted sound chip from the 3rd audio signal source input port, be connected to audio signal source input port 113 and audio signal source input port 114 by back seat left channel audio signal output port 184 and back seat right channel audio signal output port 183 by wire.
The vehicle-mounted sound chip that above-mentioned vehicle-mounted mixer circuit uses, due to audio mixing passage not having acoustic gain adjuster, the attenuator that the signal of audio mixing source of sound can only be equipped with by the rear end of audio mixing selector 124 carries out volume adjusting, and the gain-adjusted scope of this attenuator less (can only regulate in-31 ~ 0 decibel range), even if audio mixing source of sound is adjusted to minimum volume, its sound is still larger, cause user not easily to be distinguished by source of sound acoustically clear, and user's needs under some scenes cannot be met audio mixing source of sound is adjusted to the demand of very low volume.
And first above-mentioned vehicle-mounted mixer circuit selects by channel to channel adapter 123 instead of audio mixing selector 124 input configuration needing the audio mixing source of sound carrying out audio mixing, make audio mixing source of sound can carry out gain-adjusted through acoustic gain adjuster, again the first Audio output port directly being taken back the 3rd audio signal source input port with wire makes audio mixing source of sound again input vehicle-mounted sound chip, and transfers to mixer after selecting input configuration by audio mixing selector 124 and carry out audio mixing.Such scheme makes audio mixing source of sound can flow through acoustic gain adjuster thus carries out wider volume adjusting (adjustable range of acoustic gain adjuster is-79 ~ 0 decibel).Carry out by mixer the conventional art that audio mixing can only realize the volume adjusting being low to moderate-31 decibels relative to direct, can the gap of mutual for the source of sound of audio mixing volume be drawn larger, being easy to user distinguishes clear by source of sound acoustically, and meet user's needs under some scenes and audio mixing source of sound is adjusted to the demand of very low volume.
Total institute is known, the delivery outlet of a circuit module generally can not take back input port---just the application of this connection taken into account except time off-design, because this can cause input port to use, if circuit self is not the design of feedback-type, delivery outlet often also can become and cannot use.And the present inventor utilizes the feature of vehicle-mounted sound chip input port and delivery outlet self, overcome traditional technology prejudice, (first being selected on the basis of the input configuration of audio signal by channel to channel adapter 123 instead of audio mixing selector 124) is by directly taking back the 3rd audio signal source input port with wire by the first Audio output port, carry out signal to detour, do not need to increase volume processing IC and just on the basis of vehicle-mounted sound chip script sound mixing function, achieve large-scale volume adjusting.
Wherein in an embodiment, vehicle-mounted mixer circuit adopts the vehicle-mounted sound chip of TDA7719/TDA7729 series of STMicroelectronics company.As shown in Figure 3, in this embodiment, audio effect processing module specifically comprises loud assembly 131, soft assembly 132, volume assembly 133, high pitch assembly 134, middle pitch assembly 135 and bass assembly 136.Wherein loud assembly 131, soft assembly 132, high pitch assembly 134, middle pitch assembly 135 and bass assembly 136 are respectively used to adjust the waveform of audio signal corresponding frequencies.Configuration signal input port 150 is I
2c bus interface, comprises clock port (I
2c bus clock) and FPDP (I
2c data clock).The quantity of acoustic gain adjuster is 6, i.e. acoustic gain adjuster 161, i.e. acoustic gain adjuster 162, i.e. acoustic gain adjuster 163, i.e. acoustic gain adjuster 164, i.e. acoustic gain adjuster 165, i.e. acoustic gain adjuster 166.Channel to channel adapter comprises direct channel selector 123a and second channel selector 123b.It is pointed out that Fig. 3 is a schematic diagram, the circuit block do not linked together in Fig. 3 does not represent and does not in fact mutually connect.
In the embodiment shown in fig. 3, first Audio output port (i.e. R channel subwoofer output port 181, L channel subwoofer output port 182) is 16 pin and 17 pin of vehicle-mounted sound chip, and the second Audio output port (i.e. front stall right channel audio signal output port 185, back seat right channel audio signal output port 183, back seat left channel audio signal output port 184, front stall left channel audio signal output port 186) is 18 pin to 21 pin of vehicle-mounted sound chip.First audio signal source input port and the second audio signal source input port are two pin selected from 1 pin to 11 pin of vehicle-mounted sound chip, and the 3rd audio signal source input port (audio signal source input port 113, audio signal source input port 114) is 12 pin and 13 pin of vehicle-mounted sound chip.Notice that audio mixing selector 124 pairs of audio signal source input ports are restricted, therefore part audio signal source input port can not as the 3rd audio signal source input port (the such as the 7th, 8,9 pin).Due to the design reasons of audio mixing selector 124, the passage of audio mixing is restricted, does not support Differential Input, and namely audio mixing selector 124 cannot select Differential Input when selecting input configuration.And first above-mentioned vehicle-mounted mixer circuit selects the input configuration of audio mixing source of sound by direct channel selector 123a or second channel selector 123b, therefore audio mixing passage can select Differential Input.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. use vehicle-mounted sound chip to realize a method for sound mixing function, comprise the following steps:
By the first audio signal source input port input keynote source of described vehicle-mounted sound chip;
Selected the input configuration in described keynote source by master selector under the control of configuration signal;
Audio effect processing is carried out to have selected the keynote source after input configuration;
Carry out gain-adjusted by the volume of the first sound fader to the keynote source after described audio effect processing, and transfer to mixer;
The audio mixing source of sound carrying out audio mixing is needed by the second audio signal source input port input of described vehicle-mounted sound chip;
Selected the input configuration of described audio mixing source of sound by direct channel selector or second channel selector under the control of described configuration signal;
Gain-adjusted is carried out by the volume of the second sound fader to the audio mixing source of sound after described audio effect processing;
Through the first Audio output port, the audio mixing source of sound after carrying out volume adjusting is inputted described vehicle-mounted sound chip again from the 3rd audio signal source input port;
Under the control of described configuration signal, selected the input configuration of the audio mixing source of sound from the 3rd audio signal source input port input by audio mixing selector, and transfer to mixer;
By mixer, audio mixing is carried out to keynote source and audio mixing source of sound;
The audio signal after mixer audio mixing is exported by the second Audio output port.
2. the vehicle-mounted sound chip of use according to claim 1 realizes the method for sound mixing function, it is characterized in that, described configuration signal is I
2c bus signals.
3. the vehicle-mounted sound chip of use according to claim 1 realizes the method for sound mixing function, it is characterized in that, the model of described vehicle-mounted sound chip is TDA7719 or TDA7729.
4. the vehicle-mounted sound chip of use according to claim 1 realizes the method for sound mixing function, it is characterized in that, described first Audio output port is subwoofer output port.
5. a vehicle-mounted mixer circuit, comprises vehicle-mounted sound chip, it is characterized in that, described vehicle-mounted sound chip comprises the first audio signal source input port, second audio signal source input port, 3rd audio signal source input port, configuration signal input port, master selector, channel to channel adapter, audio effect processing module, first sound fader, second sound fader, first Audio output port, audio mixing selector, mixer and the second Audio output port, described first audio signal source input port, master selector, audio effect processing module, first sound fader connects successively, described second audio signal source input port, channel to channel adapter, second sound fader, first Audio output port connects successively, described first Audio output port is connected to described 3rd audio signal source input port through wire outside described vehicle-mounted sound chip, described 3rd audio signal source input port connects audio mixing selector, described audio mixing selector is all connected with described mixer with the first sound fader, and described mixer connects described second Audio output port,
Described first audio signal source input port is for inputting keynote source, described master selector is used for the input configuration selecting keynote source under the control of the configuration signal inputted by configuration signal input port, described audio effect processing module is used for carrying out audio effect processing to keynote source, described first sound fader is used for carrying out gain-adjusted to the volume in keynote source, described second audio signal source input port needs to carry out the audio mixing source of sound of audio mixing for inputting, described channel to channel adapter is used for the input configuration selecting described audio mixing source of sound under the control of described configuration signal, described second sound fader is used for carrying out gain-adjusted to the volume of described audio mixing source of sound, described first Audio output port is used for the audio mixing source of sound after Drazin inverse volume, and the audio mixing source of sound that described first Audio output port exports inputs described vehicle-mounted sound chip by wire again from described 3rd audio signal source input port, described audio mixing selector is used for the input configuration of the audio mixing source of sound selected under the control of described configuration signal from the 3rd audio signal source input port input, audio mixing is carried out in the keynote source that described mixer is used for audio mixing source of sound next for the transmission of audio mixing selector and the transmission of the first sound fader come, described second Audio output port is for exporting the audio signal after mixer audio mixing.
6. vehicle-mounted mixer circuit according to claim 5, is characterized in that, described channel to channel adapter is direct channel selector and/or second channel selector.
7. vehicle-mounted mixer circuit according to claim 5, is characterized in that, described audio effect processing module comprises loud assembly, soft assembly, volume assembly, high pitch assembly, middle pitch assembly and bass assembly.
8. vehicle-mounted mixer circuit according to claim 5, is characterized in that, described configuration signal input port is I
2c bus interface.
9. according to the vehicle-mounted mixer circuit in claim 5-8 described in any one, it is characterized in that, the model of described vehicle-mounted sound chip is TDA7719 or TDA7729.
10. vehicle-mounted mixer circuit according to claim 9, is characterized in that, described first Audio output port is 16 pin and 17 pin of vehicle-mounted sound chip, and described second Audio output port is 18 pin to 21 pin of vehicle-mounted sound chip; Described first audio signal source input port and the second audio signal source input port are two pin in 1 pin to 11 pin of vehicle-mounted sound chip, and described 3rd audio signal source input port is 12 pin and 13 pin of vehicle-mounted sound chip.
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| CN107948854A (en) * | 2017-11-17 | 2018-04-20 | 深圳创维汽车智能有限公司 | One kind operation audio generation method, device, terminal and computer-readable medium |
| CN112420083A (en) * | 2020-10-23 | 2021-02-26 | 东风汽车股份有限公司 | Vehicle-mounted audio and video 12V and 24V power supply universal control system and method |
| CN114138226A (en) * | 2021-11-30 | 2022-03-04 | 重庆长安汽车股份有限公司 | Vehicle audio mixing method and device, controller and vehicle |
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| CN106060706B (en) * | 2016-04-29 | 2020-01-24 | 惠州市德赛西威汽车电子股份有限公司 | Sound mixing method and circuit for after-loading vehicle navigation |
| CN107948854A (en) * | 2017-11-17 | 2018-04-20 | 深圳创维汽车智能有限公司 | One kind operation audio generation method, device, terminal and computer-readable medium |
| CN107948854B (en) * | 2017-11-17 | 2020-10-13 | 深圳创维汽车智能有限公司 | Operation audio generation method and device, terminal and computer readable medium |
| CN112420083A (en) * | 2020-10-23 | 2021-02-26 | 东风汽车股份有限公司 | Vehicle-mounted audio and video 12V and 24V power supply universal control system and method |
| CN114138226A (en) * | 2021-11-30 | 2022-03-04 | 重庆长安汽车股份有限公司 | Vehicle audio mixing method and device, controller and vehicle |
| CN114138226B (en) * | 2021-11-30 | 2023-05-23 | 重庆长安汽车股份有限公司 | Car machine audio mixing method and device, controller and car |
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