CN103617803A - Multi-sound-source automatic switching method and system on vehicle-mounted system - Google Patents
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Abstract
The invention relates to a multi-sound-source automatic switching method and system on a vehicle-mounted system. The method includes the starting step, the judgment step, the switching step and the sound mixing step. In the starting step, when one sound source application program is started, configuration information of the sound source application program is acquired, wherein the configuration information comprises a preset priority. In the judgment step, priorities of all started sound source application programs are compared, and the sound source application program with the highest priority is selected as a latest playing task. In the switching step, a single sound channel corresponding to the sound source application program used as the latest playing task is switched to. In the sound mixing step, audio signals of the single sound channel which is switched to and audio signals of one sound mixing channel are mixed and then output. Furthermore the volume of audio signals of the sound source application program corresponding to the single sound channel which is switched to and the volume of audio signals of the sound source application program corresponding to the sound mixing channel can be respectively controlled, and the audio signals of the sound source application program corresponding to the single sound channel which is switched to and the audio signals of the sound source application program corresponding to the sound mixing channel are mixed and output. Under the condition that the multiple sound source application programs on the vehicle-mounted system are all started, automatic switching and sound mixing output of sound sources can be achieved.
Description
Technical field
The present invention relates to a kind of vehicle-mounted source of sound management method and system, particularly about multiple sound resource changing method and system on a kind of onboard system.
Background technology
Development along with automotive electronic technology, increasing multimedia technology is constantly added on vehicle intelligent terminal platform, the vehicle-mounted Play System of MP3, DVD of using as audiovisual entertainment, auxiliary GPS onboard navigation system of driving use, and the Bluetooth voice call system used of wireless telecommunications etc.Because space and the electric power of automotive interior are limited, the hardware resource of terminal platform is restricted, and can not distribute a relatively independent hardware cell for each application program, so this to how reasonably sharing hardware resource has higher requirement.Particularly, when a plurality of source of sound application programs all opened and etc. in situation to be played, how according to the importance of sounding or user's demand, between different sources of sound, to automatically switch or to carry out selectively audio mixing output, to have become a technical matters urgently to be resolved hurrily.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of can automatically switch or the onboard system of audio mixing output on multiple sound resource changing method and system.
The invention provides multiple sound resource changing method on a kind of onboard system, it comprises the following steps:
Open step: when a source of sound application program is opened, obtain its configuration information, described configuration information comprises default priority;
Determining step: the priority of the source of sound application program of more all unlatchings, therefrom select source of sound application program that priority is the highest as up-to-date playing task;
Switch step: be switched to as single-tone passage corresponding to the source of sound application program of up-to-date playing task;
Audio mixing step: the sound signal of the single-tone passage being switched to is mixed to rear output with the sound signal of an audio mixing passage.
In above-mentioned determining step, if exist the source of sound application program of two or more unlatchings to there is limit priority simultaneously, select the source of sound application program of wherein up-to-date unlatching as up-to-date playing task.
In above-mentioned audio mixing step, first by the turning down sound volume of the sound signal of the lower source of sound application program of source of sound application program corresponding to the single-tone passage the being switched to source of sound application program medium priority corresponding with audio mixing passage or be adjusted into zero, and then mix output.
The source of sound application program that above-mentioned audio mixing passage is corresponding is a plurality of digital audio application programs, and the digital audio and video signals of a plurality of digital audio application programs output is through stereo process and convert to after simulated audio signal, just by described audio mixing passage, exports.
And further, the digital audio and video signals of a plurality of digital audio application programs output is through stereo process and convert to after simulated audio signal, in by described audio mixing passage output, also by a single-tone passage, exports.
Source of sound application program on above-mentioned onboard system comprises Bluetooth voice call application program and GPS onboard navigation system, wherein the priority of GPS onboard navigation system is lower than the priority of Bluetooth voice call application program, but higher than the priority of other source of sound application programs.
In addition, the present invention also provides multiple sound resource switched system on a kind of onboard system, it is characterized in that, comprising:
Priority judgement control module, for obtain its configuration information when described onboard system source of sound application program is opened, according to the priority parameters in described configuration information, from the source of sound application program of all unlatchings, select source of sound application program that priority is the highest as up-to-date playing task, and export corresponding steering order;
Hyperchannel source of sound handover module, its input end is by the corresponding circuit module that is connected source of sound application program on described onboard system of an audio mixing passage and a plurality of single-tone passages, for receiving the sound signal of described circuit module output, control end connects described priority judgement control module, the steering order transmitting for receiving described priority judgement control module, using and be switched to described audio mixing passage and as single-tone passage corresponding to the source of sound application program of up-to-date playing task, after sound signal is wherein mixed, export according to described steering order.
The steering order that above-mentioned hyperchannel source of sound handover module also transmits according to described priority judgement control module, regulates and controls described audio mixing passage and as the volume of the sound signal of single-tone passage corresponding to the source of sound application program of up-to-date playing task based on priority.
Also comprise further:
Numeral stereo process module, it connects on described onboard system the circuit module of digital audio application program in source of sound application program, for the digital audio and video signals of described digital audio application program circuit module output is carried out exporting after digital stereo process;
Digital audio decoding module, it is connected between described digital stereo process module and described hyperchannel source of sound handover module, for converting the digital audio and video signals after the audio mixing of described digital stereo process module output to simulated audio signal, by single-tone passage described in described audio mixing passage and/or, be sent to described hyperchannel source of sound handover module.
Above-mentioned priority judgement control module utilizes storehouse according to priority order from high to low, to deposit the data message of the source of sound application program of unlatching, and the source of sound application program at described storehouse top is up-to-date playing task; When a source of sound closing application program, the data message of this source of sound application program in described heap stack deletion stack.
Compared with prior art, tool of the present invention has the following advantages:
1, the present invention is by arranging priority parameters for each source of sound application program on onboard system, can be to source of sound application programs all on onboard system, comprise digital audio application program and analogue audio frequency application program, for example, according to certain rule (importance of sounding), automatically switch, thereby can utilize efficiently vehicle-mounted limited hardware resource;
2, the present invention relatively independent and dynamically managing with the little priority of onboard system degree of association judgement control module by one/etc. source of sound application program to be played, can effectively improve stability and the extensibility of automatic switchover system work;
3, configuration information and the corresponding relation thereof such as the priority parameters of the present invention by the default source of sound application program of a source of sound admin table and sounding passage, flexibility ratio is high and extendability is strong, is especially convenient to later stage modify and maintenance, as the specific (special) requirements according to user is adjusted.
Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in instructions, claims and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of the automatic switchover system of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the source of sound admin table of the embodiment of the present invention;
Fig. 3 is that the embodiment of the present invention utilizes storehouse to judge the method flow diagram of up-to-date playing task.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Can integrated various tone sources application program in a vehicle multimedia navigation entertainment systems (hereinafter referred to as onboard system), these source of sound application programs can be divided into digital audio application program and the large classification of analogue audio frequency application program two according to signal type.Wherein, Android operating system and GPS onboard navigation system, and outputting digital audio signals such as the digital sound in the movable storage devices such as SD card, video player, belong to digital audio application program; Radio application program, Bluetooth voice call application program, Bluetooth music application program, DVD application program and ipod application program, and other external sound source input application program output simulated audio signal, belong to analogue audio frequency application program.
Conventionally, the digital audio and video signals of digital audio application program output need to, after digital audio decoding module converts becomes corresponding simulated audio signal, could broadcast by sound-producing device.In Chinese patent application document publication number CN102774321A, disclose a kind of for onboard system on the digital mixed audio processing method of a plurality of digital audio application programs.The method is by arranging a digital stereo process module between the circuit module in digital audio application program and digital audio decoding module, to adjust as required the volume of a plurality of digital audio application program outputting digital audio signals, carry out offering again digital audio decoding module after stereo process and decode.The method can be avoided the sound interference between multiple digital audio application program as far as possible, for example, when GPS onboard navigation system sounding, driver can automatically turn down the volume of the digital audio and video signals of other digital audio application program outputs, so that can not hear the sound of GPS onboard navigation system.The present invention can be in conjunction with the method, when stating digital sound mixing function in realization, by introducing priority parameters, source of sound application program all on onboard system (comprising digital audio application program and analogue audio frequency application program) is carried out to unified management, according to certain rule, automatically switch and stereo process.
As shown in Figure 1, for achieving the above object, the present invention need to provide multiple sound resource switched system on a kind of onboard system, and this system comprises digital stereo process module 10, digital audio decoding module 20, priority judgement control module 30 and hyperchannel source of sound handover module 40, wherein:
Numeral stereo process module 10, according to digital audio processing algorithm, (particular content refers to sound adjustment and the audio mixing module that Chinese patent application document publication number CN102774321A records for it, do not describe in detail) herein, the volume of the circuit module outputting digital audio signal of the digital audio application program of opening according to certain rule adjustment, then carry out stereo process, mixed digital audio and video signals is passed to digital audio decoding module 20; Meanwhile, digital stereo process module 10 can also be passed to the configuration information of the digital audio application program of unlatching priority judgement control module 30.
Digital audio decoding module 20, it connects digital stereo process module 10, for receiving the digital audio and video signals from digital stereo process module 10, convert thereof into simulated audio signal, by audio mixing passage He Yi road, a road single-tone passage, pass to hyperchannel source of sound handover module 40.
Priority judgement control module 30, it is for collecting the configuration information of digital tone source application program and analog audio source application, and the priority parameters based on wherein default, according to given rule, select current unlatching and the highest source of sound application program of priority as up-to-date playing task, then send corresponding steering order to hyperchannel source of sound handover module 40, to control it, carry out source of sound switching or stereo process.In the present embodiment, priority judgement control module 30 can adopt MCU processor to realize.
On above-mentioned onboard system, the configuration information of each source of sound application program can comprise the information such as program name, on off state, priority and sounding passage of audio application.The transmission of the Interface realization configuration information of " Open " and " Close " calling program that can provide by following system applies layer particularly:
Open(source of sound application name, priority);
Close(source of sound application name).
Hyperchannel source of sound handover module 40 is audio processing modules of supporting a road audio mixing passage and multichannel single-tone passage, this module can be switched back and forth between described multichannel single-tone passage, therefrom selecting a road single-tone passage mixes with the sound signal of described audio mixing passage, mixed sound signal is exported to the sound-producing devices such as the amplifier module of rear class and loudspeaker, amplifies and broadcasts.In addition, hyperchannel source of sound handover module 40 can also be controlled separately the volume of the sound signal of described multichannel single-tone passage and audio mixing passage, therefore when to control the volume of the sound signal of described audio mixing passage be zero, just can realize the independent broadcasting of selected single-tone passage diaphone source application.
Method of work below in conjunction with specific embodiment explanation said system:
In an embodiment of the present invention, hyperchannel source of sound handover module 40 can be supported audio mixing passage He Liu road, a road single-tone passage.As noted earlier, Android operating system and GPS onboard navigation system, and the digital audio and video signals of exporting such as the digital sound in the movable storage devices such as SD card, video player is first after the digital stereo process of digital stereo process module 10, through digital audio decoding module 20, decode again, convert corresponding simulated audio signal to, then preferably by audio mixing passage He Yi road single-tone passage, reach hyperchannel source of sound handover module 40; Remaining Wu road single-tone passage preferably respectively with receiver circuit module, Bluetooth circuit module, DVD circuit module and ipod audio circuit module, and the corresponding connection of the output terminal of other external sound source circuit module, the simulated audio signal of corresponding source of sound is reached to hyperchannel source of sound handover module 40.Under the control of priority judgement control module 30, hyperchannel source of sound handover module 40 can switch between the single-tone passage of Liu road back and forth, be switched to single-tone passage corresponding to up-to-date playing task, the sound signal of single-tone passage corresponding to up-to-date playing task is mixed to output with the sound signal of audio mixing passage.In the present embodiment, mixing the mode of exporting has following several:
1) radio sound+digital audio decoding module output;
2) bluetooth sound+digital audio decoding module output;
3) DVD sound+digital audio decoding module output;
4) ipod sound+digital audio decoding module output;
5) other sound+digital audio decoding module output.
Because hyperchannel source of sound handover module 40 can be controlled respectively the volume of audio mixing passage He Liu road single-tone passage, therefore can be further, the volume of the sound signal of audio mixing passage is turned down separately or is adjusted into zero, so that the sound signal of single-tone passage corresponding to up-to-date playing task is exported separately.In the present embodiment, the mode of output has following several separately:
1) radio sound;
2) bluetooth sound;
3) DVD sound;
4) ipod sound;
5) other sound;
6) output of digital audio decoding module.
It will be appreciated by those skilled in the art that above-mentioned is an embodiment of multiple sound resource switched system on onboard system provided by the invention, and the scope of patent protection that the present invention requires should far be not limited to this.For example, while only installing a DAB application program on onboard system, can not use digital stereo process module to carry out digital stereo process, but directly by digital audio decoding module converts, become simulated audio signal, pass to hyperchannel source of sound handover module.Or, while only installing some analogue audio frequency application programs on onboard system, without again for it arranges digital stereo process module and digital audio decoding module.In addition, in order to make digital audio and video signals, can either export separately, can export by Yu Yi road simulated audio signal audio mixing again, the present embodiment sends digital audio and video signals to hyperchannel source of sound handover module by audio mixing passage He Yi road single-tone passage simultaneously, but is never limited to this.
The method of work of system medium priority judgement control module 30 provided by the invention is described below further:
On onboard system, having a plurality of source of sound application programs whiles when opening, in order to realize and to automatically switch according to the importance of sounding or according to user's requirement, need to be each source of sound application deployment priority parameters.In the present embodiment, the priority parameters of each source of sound application program, generation passage (audio mixing passage and single-tone passage) and corresponding relation thereof can be preset (as shown in Figure 2 in a source of sound admin table, but be not limited to this), to facilitate the later stage can expand, revise and safeguard.
While having a source of sound application program to open on onboard system, priority judgement control module is obtained the configuration information of this source of sound application program from source of sound admin table.Wherein, if digital audio application program can first be passed to priority judgement control module after digital stereo process module is transferred from source of sound admin table again; If analogue audio frequency application program, can judge that control module directly transfers by priority.
Priority based on collecting, the priority of the source of sound application program of the more all unlatchings of priority judgement control module, therefrom selects source of sound application program that priority is the highest as up-to-date playing task.In the present embodiment, priority judgement control module can utilize storehouse to realize above-mentioned deterministic process, certainly except storehouse, can also utilize other for example with the list of pointer, to realize above-mentioned deterministic process, at this, does not limit.This storehouse can be deposited the source of sound application program (P having opened according to priority order from high to low
i>=P
i-1>=...>=P
0, P is priority, subscript i represents that stack internal memory puts forward order, at the bottom of i=0 represents stack) related data information, as priority parameters and voice data etc.Particularly, as shown in Figure 3, utilize the method for storehouse judgement priority can comprise following step:
Step S1, when new unlatching one source of sound application program, storehouse obtains its priority P
newafter, by P
newwith the priority P of depositing in the source of sound application program in storehouse
i, P
i-1..., P
0compare one by one:
If the priority P of new source of sound application program of opening
newbe more than or equal to the priority P of a certain source of sound application program
j, according to priority orders, the related data of the source of sound application program of newly opening is inserted to the relevant position in storehouse, also insert P
j+
1, P
jbetween the related data information of corresponding two source of sound application programs;
Otherwise continue relatively, until at the bottom of stack;
Step S2, selects the source of sound application program that is positioned at storehouse top as up-to-date playing task.
So just can guarantee that up-to-date playing task is the source of sound application program with limit priority.Further, for exist plural source of sound application program to have the situation of limit priority simultaneously, up-to-date playing task is the source of sound application program with limit priority and up-to-date unlatching.For example,, at radio application program (P
0=0) and GPS onboard navigation system (P
1=1) all open, and in the in progress situation of GPS onboard navigation system, when user wishes to call and opens Bluetooth voice call application program (P
2=1), time, the Bluetooth voice call application program of up-to-date unlatching replaces GPS onboard navigation system as new playing task.
Step S3, exports the steering order corresponding with up-to-date playing task to hyperchannel source of sound handover module, makes it be switched to single-tone passage corresponding to up-to-date playing task, plays sound.In the present embodiment, deposited the top of storehouse as the related data information such as source of sound of the source of sound application program of up-to-date playing task in, while switching single-tone passage, essence is all that the data message of getting stack top is exported at every turn.
Step S4, closes source of sound application program.In the present embodiment, when closing a source of sound application program, also must delete the related data information of this source of sound application program in storehouse.
Except selecting the source of sound application program as up-to-date playing task, the judged result of above-mentioned priority can also be adjusted volume for hyperchannel source of sound handover module.Concrete grammar is as follows:
Priority judgement control module is exported corresponding steering order, controlling hyperchannel source of sound handover module is switched to after corresponding single-tone passage, also control further hyperchannel source of sound handover module by the turning down sound volume of the sound signal of the lower source of sound application program of the source of sound application program of the single-tone passage the being switched to source of sound application program medium priority corresponding with audio mixing passage or be adjusted into zero, and then mix, export mixed sound signal.For example,, when Bluetooth voice call application program is as new playing task and during sounding, hyperchannel source of sound handover module can be turned down GPS onboard navigation system in audio mixing passage or be adjusted into zero, so that voice call is not subject to the interference of other sound.
It should be noted that, above-mentioned steps of the present invention can be by realizing on general calculation element such as one group of computing machine steering order, and, although provided the workflow diagram (shown in Fig. 3) that shows execution sequence in Figure of description, but be not limited to this, in some cases, can carry out step of the present invention according to different orders or combination, carry out the automatic switchover of source of sound.For example,, in utilizing the technical scheme of storehouse, as radio application program (P
0=0), GPS onboard navigation system (P
1=1) and Bluetooth voice call application program (P
2=1) all open, and Bluetooth voice call application program is just when sounding, if user closes this Bluetooth voice call application program, automatic switchover system of the present invention can first be deleted the related data information of this Bluetooth voice call application program in storehouse, then turning and perform step S2, select to be positioned at the source of sound application program at storehouse top, is also that GPS onboard navigation system is as up-to-date playing task, be switched to single-tone passage corresponding to GPS onboard navigation system, play sound.
Although the disclosed embodiment of the present invention as above, the embodiment that described content just adopts for the ease of understanding the present invention, not in order to limit the present invention.Technician in any the technical field of the invention; do not departing under the prerequisite of the disclosed spirit and scope of the present invention; can do any modification and variation what implement in form and in details; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (10)
1. a multiple sound resource changing method on onboard system, it comprises the following steps:
Open step: when a source of sound application program is opened, obtain its configuration information, described configuration information comprises default priority;
Determining step: the priority of the source of sound application program of more all unlatchings, therefrom select source of sound application program that priority is the highest as up-to-date playing task;
Switch step: be switched to as single-tone passage corresponding to the source of sound application program of up-to-date playing task;
Audio mixing step: the sound signal of the single-tone passage being switched to is mixed to rear output with the sound signal of an audio mixing passage.
2. automatic switching method as claimed in claim 1, is characterized in that:
In described determining step, if exist the source of sound application program of two or more unlatchings to there is limit priority simultaneously, select the source of sound application program of wherein up-to-date unlatching as up-to-date playing task.
3. automatic switching method as claimed in claim 1 or 2, is characterized in that:
In described audio mixing step, first by the turning down sound volume of the sound signal of the lower source of sound application program of the source of sound application program of the single-tone passage the being switched to source of sound application program medium priority corresponding with audio mixing passage or be adjusted into zero, and then mix output.
4. automatic switching method as claimed in claim 3, is characterized in that:
The source of sound application program that described audio mixing passage is corresponding is a plurality of digital audio application programs, and the digital audio and video signals of a plurality of digital audio application programs output is through stereo process and convert to after simulated audio signal, just by described audio mixing passage, exports.
5. automatic switching method as claimed in claim 4, is characterized in that:
The digital audio and video signals of a plurality of digital audio application programs output is through stereo process and convert to after simulated audio signal, in by described audio mixing passage output, also by a single-tone passage, exports.
6. automatic switching method as claimed in claim 1 or 2, is characterized in that:
Source of sound application program on described onboard system comprises Bluetooth voice call application program and GPS onboard navigation system, wherein the priority of GPS onboard navigation system is lower than the priority of Bluetooth voice call application program, but higher than the priority of other source of sound application programs.
7. a multiple sound resource switched system on onboard system, is characterized in that, comprising:
Priority judgement control module, for obtain its configuration information when described onboard system source of sound application program is opened, according to the priority parameters in described configuration information, from the source of sound application program of all unlatchings, select source of sound application program that priority is the highest as up-to-date playing task, and export corresponding steering order;
Hyperchannel source of sound handover module, its input end is by the corresponding circuit module that is connected source of sound application program on described onboard system of an audio mixing passage and a plurality of single-tone passages, for receiving the sound signal of described circuit module output, control end connects described priority judgement control module, the steering order transmitting for receiving described priority judgement control module, using and be switched to described audio mixing passage and as single-tone passage corresponding to the source of sound application program of up-to-date playing task, after sound signal is wherein mixed, export according to described steering order.
8. automatic switchover system as claimed in claim 7, it is characterized in that, the steering order that described hyperchannel source of sound handover module also transmits according to described priority judgement control module, regulates and controls described audio mixing passage and as the volume of the sound signal of single-tone passage corresponding to the source of sound application program of up-to-date playing task based on priority.
9. automatic switchover system as claimed in claim 7 or 8, is characterized in that, also comprises further:
Numeral stereo process module, it connects on described onboard system the circuit module of digital audio application program in source of sound application program, for the digital audio and video signals of described digital audio application program circuit module output is carried out exporting after digital stereo process;
Digital audio decoding module, it is connected between described digital stereo process module and described hyperchannel source of sound handover module, for converting the digital audio and video signals after the audio mixing of described digital stereo process module output to simulated audio signal, by single-tone passage described in described audio mixing passage and/or, be sent to described hyperchannel source of sound handover module.
10. the automatic switchover system as described in claim 7～9 any one, is characterized in that:
Described priority judgement control module utilizes storehouse according to priority order from high to low, to deposit the data message of the source of sound application program of unlatching, and the source of sound application program at described storehouse top is up-to-date playing task; When a source of sound closing application program, the data message of this source of sound application program in described heap stack deletion stack.
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