CN2630045Y - Vehicular audio-video apparatus capable of expanding auxiliary signal source and interface control circuit thereof - Google Patents
Vehicular audio-video apparatus capable of expanding auxiliary signal source and interface control circuit thereof Download PDFInfo
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- CN2630045Y CN2630045Y CN 03256442 CN03256442U CN2630045Y CN 2630045 Y CN2630045 Y CN 2630045Y CN 03256442 CN03256442 CN 03256442 CN 03256442 U CN03256442 U CN 03256442U CN 2630045 Y CN2630045 Y CN 2630045Y
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Abstract
A video and audio device of an automobile comprises: an existing signal source for producing an existing audio signal, a subsidiary signal source for producing a subsidiary audio signal, an interface control circuit and a dimensional sound control host computer. The interface control circuit is connected with the existing signal source and the subsidiary signal source, to respectively receive the existing audio signal and the subsidiary audio signal, which are alternatively chosen as an output audio signal, according to the requirement of a user. The dimensional sound control host computer, which is connected with the interface control circuit, is used for disposing the received output audio signal into voice output.
Description
(1) technical field
The utility model relevant a kind of automobile-used AV device, the particularly automobile-used AV device and the control circuit thereof of relevant a kind of extendible auxiliary source.
(2) background technology
Along with the progress of digital audio-video science and technology, offer human well-rounded audio-visual entertainment life, even if people understand directly influence lifestyle at home for the demand of audio-visual amusement, thereby the agitation of family's theater is arranged.Then, further extend to Vehicular mobile formula environment,, have some idea of even be equipped with by the standard of CD-ROM device LCD TV screens (LCD TV) such as CD, VCD, DVD being classified as automobile in recent years for high-quality audio-visual demand.
Because it is appropriate that audio-video system has assembled when car dispatches from the factory, then when the user has the demand of expansion auxiliary source (being commonly called as AUX), must reequip by the please in the streets automobile-used sound equipment assembling plant of committee with making or have much ado.Yet committee asks the assembling plant repacking not only to take and do not slander, and is also quite consuming time; In addition, the quality of assembling plant repacking quality, whether skillful the assembly technique of looking closely the assembling plant skilled worker is, and shortage can be for the level of trusting.And after the repacking, the promptly negative responsibility admittedly of protecting of former factory is keeped in repair in the future and is not had door voluntarily.Therefore, although the user has the tight demand of expanding auxiliary source, also is limited to these problems and dismisses the idea.
For addressing these problems, the known FM of utilization modulator (FM modulator) provide extended function.Known FM modulator is to be coupled between antenna and the stereophony main control system, and has an auxiliary input end, for the auxiliary source that receives required increase, is signal sources such as MP3, DVD, MD, TV-Tuner, satellite television for example.When the user desires broadcast listening, even if this FM modulator can provide the FM broadcast singal that antenna received to give with the stereophony main control system and handle.When the user selects to use auxiliary source, even if this FM modulator can be intercepted the signal path between antenna and stereophony main control system forbidden energy (disable), make the stereophony main control system can't handle the FM signal that receives by the antenna place, but after auxiliary source become the FM signal through the FM modulation process, provide again and give the stereophony main control system and carry out demodulation (demodulation) reduction.Yet, the mode of known FM modulation/demodulation, not good because of frequency response, in signal processing, can cause serious out-of truth problem, thereby the quality of deterioration subsidiary signal.
In addition, the known chromacoder that utilizes in addition is made into the outward appearance with similar recording cassette tape (cassette), has an auxiliary input end simultaneously, receiving the auxiliary source of required increase, is signal sources such as MP3, DVD, MD, TV-Tuner, satellite television for example.When user's desire is selected auxiliary source, just this chromacoder is inserted in the cassette playback seat of stereophony main control system,, in the electromagnetic conversion mode auxiliary source is sent to the stereophony main control system and handles via magnetic head by chromacoder.But the electromagnetic conversion process still can cause the serious out-of truth problem of signal; In addition, known chromacoder must for the car that does not dispose cassette playback seat, must use the chromacoder of this class by the cassette deck as the signal conversion medium.
Therefore, do not changing its original main system of audio circuit, and the person that can increase the auxiliary source, and high-quality, undistorted, easy auxiliary source extended mode can be provided, be the required of this people in the industry.
(3) utility model content
Therefore, a purpose of the present utility model is to provide a kind of automobile-used AV device and control circuit thereof of extendible auxiliary source, can not change and disassemble its original main system of audio circuit and the expansion that can obtain auxiliary source.
Another purpose of the present utility model is to provide a kind of automobile-used AV device and control circuit thereof of extendible auxiliary source, and high-quality, undistorted, easy expansion signal source extended mode can be provided.
For achieving the above object, the utility model can be by providing a kind of automobile-used AV device to finish.This automobile-used AV device comprises: in order to an existing signal source that produces an existing sound signal, an auxiliary source, an interface control circuit and the stereophony main control system in order to produce an auxiliary audio signal.Interface control circuit is to be coupled to existing signal source and auxiliary source, receives existing sound signal and auxiliary audio signal respectively, and required according to a user, one of chooses in existing sound signal and the auxiliary audio signal as an output audio signal.The stereophony main control system then is coupled to interface control circuit, after receiving output audio signal, is treated as voice output.
In addition, the utility model also provides a kind of interface control circuit, can be coupled to an existing signal source and an auxiliary source, receives an existing sound signal and an auxiliary audio signal respectively.Interface control circuit comprises a treater and an auxiliary activation device.Treater is to couple existing signal source, and auxiliary activation device is that what produce an auxiliary enable signal has not according to whether the choosing of subsidiary signal; After the treated device of auxiliary enable signal receives, can be with existing signal source forbidden energy, and make auxiliary audio signal that auxiliary source produces as an output audio signal; Otherwise, can be with existing sound signal as output audio signal.
In view of the above, the utility model and can reach the purpose that auxiliary source expands under the prerequisite that does not change original stereophony main control system and existing signal source circuit.According to the utility model, be the control path that utilizes existing signal source, with the simulator of interface control circuit simulation as existing signal source.And with FM modulation/demodulation or electromagnetic conversion, the automobile-used AV device and the control circuit thereof of the extendible auxiliary source of the utility model then can provide high-quality, undistorted, easy expansion signal source extended mode compared to known.
For above-mentioned and other purposes of the present utility model, characteristics and advantage can be become apparent, some preferred embodiments cited below particularly, and cooperate institute's accompanying drawing to be elaborated as follows:
(4) description of drawings
Fig. 1 is the block schematic diagram that shows according to automobile-used AV device one preferred embodiment of the present utility model;
Fig. 2 is the block schematic diagram that shows according to the utility model interface control circuit 2;
Fig. 3 is the control flow chart that is shown as according to the utility model one preferred embodiment; And
Fig. 4 is the block schematic diagram that shows according to automobile-used another preferred embodiment of AV device of the present utility model.
(5) specific embodiment
Please refer to Fig. 1, be depicted as block schematic diagram according to automobile-used AV device one preferred embodiment of the present utility model.As shown in Figure 1, comprise according to automobile-used AV device of the present utility model: a stereophony (stereo) main control system 1, an interface control circuit 2, a DVD player 3, a display screen 4 and auxiliary (auxiliary) signal source 5.Usually, stereophony main control system 1 includes audio frequency processing circuits such as AM/FM tuner (AM/FMTuner), audiotape cassette player (cassette player), enlarger and partial device and loud speaker (speaker) or the like.DVD player 3 then representative has been assemblied in any player on the car, it can be audio player, as sound laser disc (compact disc, abbreviate CD as) player, also can be in conjunction with the audio ﹠ video player, as video and audio CD disc (video compact disc abbreviates VCD as) player, digital audio-video laser disc (digital versatile disc abbreviates DVD as) player or video tape (videocassette) player etc.In addition, DVD player 3 also can be combined into video disc record changer (disc changer) in conjunction with DVD multidisc sheet disc changing mechanism.Because stereophony main control system 1 is all identical with known person or similar with DVD player 3, repeat no more in this event.
According to the utility model, be that interface control circuit 2 is arranged between stereophony main control system 1 and the DVD player 3.As shown in Figure 1, interface control circuit 2 is to be coupled to stereophony main control system 1 and to be coupled to DVD player 3 via second control bus 7 via first control bus 6.When DVD player 3 is play, sound signal 8 and vision signal 9 be can produce, interface control circuit 2 and display screen 4 places are sent to respectively.Auxiliary source 5 then can produce corresponding sound signal 11 and vision signal 12, is sent to interface control circuit 2 and display screen 4 places respectively.DVD player 3 is as if only simple sound signal player, with the generation of no video signal 9; In like manner, auxiliary source 5 then will not have the generation of video letter 11 if be simple sound signal player only.And auxiliary source 5 can be signal sources such as MP3, DVD, MD, TV-Tuner, satellite television; In other words, promptly being different from the signal source of existing DVD player 3, is the signal source according to the required institute of user additive incrementation.In addition, display screen 4 is for display video signal 9 or 11 usefulness, can be cathode-ray tube TV (Cathode Ray Tub TV), LCD TV (Liquid Crystal Display TV), plasma television (Plasma TV), light-emitting diode TV (LED TV), Organic Light Emitting Diode TV (Organic LED TV) or field emission component TV (Field Emission Display TV) or the like.And interface control circuit 2 receives sound signal 8 and 10, can be according to user's operation, select sound signal 8 or sound signal 10 as audio output signal 12, provide again and give after stereophony main control system 1 handles, become voice output by loud speaker (not shown).
The stereophony main control system 1 of known automobile-used AV device is directly to be coupled to DVD player 3, between stereophony main control system 1 and the DVD player 3, is to scan (scanning) control by control bus.Therefore, when the user chooses DVD player 3 via stereophony main control system 1, can send actuation signal, make DVD player 3 entrys into service, and the sound signal 8 that is produced is sent to 1 output of stereophony main control system via control bus.According to the utility model, need not change the circuit of stereophony main control system 1 and existing DVD player 3, utilize the extended function that interface control circuit 2 can be obtained increases at least one group of auxiliary source.Therefore, with regard to stereophony main control system 1, need not judge that audio output signal 12 is from existing DVD player 3 or from auxiliary source 5, and replace DVD player 3 by interface control circuit 2, scan (scanning) control via first control bus 6 and stereophony main control system 1.In addition, by user's demand, select DVD player 3 or auxiliary source 5 that audio output signal 12 is provided by interface control circuit 2.If the user selects DVD player 3, then interface control circuit 2 is just as shunting device (bypass), and sound signal 8 as audio output signal 12, is provided and gives stereophony main control system 1 and handle; If the user selects auxiliary source 5, interface control circuit 2 can shut down via second control bus, 7 indication DVD players 3, and the generation of absence of audio signal 8 is given stereophony main control system 1 and is processed and sound signal 10 provided as audio output signal 12.
Please refer to Fig. 2, be depicted as block schematic diagram according to the utility model interface control circuit 2.Among Fig. 2, interface control circuit 2 comprises: a treater 20, an oscillator 21, two digital filters 22 and 23, an auxiliary activation device 24, an auxilary selector 25, quasi converter 26, an outlet selector 27 and an indicating device 28 etc.Hereinafter will be as follows with regard to the main composition element division of interface control circuit 2.
Treater 20
Treater 20 is according to set program (will describe in detail in Fig. 3) whole interface control circuit 2 to be carried out a control.Preferable, this treater 20 can be nibble, eight bits or sixteen bit unit microprocessor (micro-processor).If treater 20 is the specifications that adopt 5V or 3.3V voltage, then the 12V voltage by automobile-used storage battery output also must pass through power filter (power filter) and voltage regulator (voltage regulator) etc., after the 12V voltage-regulation become 5V or 3.3V voltage, power supply input pin VDD to treater 20 can be provided, make treater 20 carry out control operation according to 5V or 3.3V voltage.
Oscillator 21 is connected to treater 20, and in order to providing a reference frequency 210 preprocessors 20, and treater 20 produces control clock pulses (clock) according to this reference frequency 210, carries out the required control clock pulse of digit manipulation as interface control unit 10.Usually, oscillator 21 can be a crystal oscillator, is connected between the XIN and XOUT pin of treater 20, and the reference frequency of about 100KHz ~ 10MHz scope is provided.
In addition, whether replacement (reset) pin of an all right low voltage detector connection processing device 20 had low phenomenon in order to detect the voltage regulator output voltage.If when detecting output voltage and being lower than certain set voltage level (for example being 3.5V or 3V), to treater 20 operation of resetting.The situation that this voltage level is low excessively may be when occurring in car and starting or the old situation of automobile storage battery under.
Treater 20 couples with stereophony main control system 1 and DVD player 3 respectively via digital signal filter device 22 and 23.This digital signal filter device 22 and 23 can be realized by low-pass filter (low passfilter), uses for doing accurate adjustment the in signal filtering and position.Therefore, similar with first control bus 6 actually though 20 of digital signal filter device 22 and treaters are provided with control bus 220, be to use in order to transmit control signal; In like manner, similar with second control bus 7 actually though 20 of digital signal filter device 23 and treaters are provided with control bus 230, be the control signal that makes DVD player 3 runnings or stop in order to transmission.
Auxiliary activation device 24
Auxiliary activation device 24 is the selections according to the user, presents closed condition or opening.If auxiliary activation device 24 is closed condition, the expression user selects DVD player 3, then interface control circuit 2 is just as shunting device (bypass), sound signal 8 is become audio output signal 12 via outlet selector 27 output, and provide and give stereophony main control system 1 and further handle.If auxiliary activation device 24 is opening, the expression user selects auxiliary source 5, and then auxiliary activation device 24 can produce auxiliary enable signal 240 preprocessors 20.At this moment, treater 20 can be via second control bus 7, and indication DVD player 3 shuts down, so the generation of absence of audio signal 8.In addition, treater 20 can produce an assisted Selection signal 200 and give auxilary selector 25, also can produce an indicator signal 202 and give indicating device 28, informs that user's auxiliary mode starts.Preferable, indicating device 28 can be realized by light-emitting diode, also can be to utilize the liquid crystal display screen (LCD) on the stereophony main control system 1 to realize that this auxiliary source is indicated form certainly, must be different with the display format of DVD player 3 songs.
This auxiliary activation device 24 can realize by a switch circuit that for example: when user's desire selection DVD player 3, then auxiliary activation device 24 switches to closed condition, will assist enable signal 240 to be connected to active potential; When the user selects auxiliary source 5, then assist activation device 24 to switch to opening, at this moment, auxiliary enable signal 240 is connected to high potential, thereby causes treater 20 generation assisted Selection signals 200 to give auxilary selector 25.And the user can utilize former stereophony main control system 1 for the choosing of the video disc number of DVD player 3, the corresponding selection operations that become different auxiliary audio signal sources.
In addition, auxiliary activation device 24 can utilize button unnecessary on the stereophony main control system 1 to realize, for example: can utilize the on off state of loudness (COMP) button, whether the choosing of corresponding auxiliary audio signal source 5.In addition, auxiliary activation device 24 also can utilize the remote control (Remote) of DVD player 3 starts to produce high active potential, produces on off state.
Auxilary selector 25
According to the utility model, as long as the bit number of assisted Selection signal 200 is many more, then open-ended signal source number is also many more.If assisted Selection signal 200 has two bits, then at most can be in order to choose four auxiliary source 5A, 5B, 5C, 5D etc., this auxiliary source 5A, 5B, 5C, 5D provide auxiliary audio signal 10A, 10B, 10C, 10D respectively.Auxilary selector 25 is according to the bit combination of assisted Selection signal 200, one of chooses among auxiliary audio signal 10A, 10B, 10C, the 10D etc., and output becomes chooses auxiliary audio signal 250.This auxilary selector 25 can be multichannel analog multiplexer (multiplechannel analog multiplexer), and connects data input pin with auxiliary audio signal 10, with assisted Selection signal 200 link address input ends.And auxiliary audio signal 10A, 10B, 10C, 10D can be the sound signals of signal sources such as MP3, DVD, MD, TV-Tuner, satellite television.
Position quasi converter 26
Because auxiliary audio signal 10A, 10B, 10C, 10D that different auxiliary source 5A, 5B, 5C, 5D are produced, the accurate difference in position to each other is very big, therefore, after must choosing auxiliary audio signal 250 and carry out operations such as signal amplifies, the accurate conversion in position by 26 pairs of position quasi converters, become conversion auxiliary audio signal 260, provide and give outlet selector 27.This quasi converter 26 can adopt op amp (operationalamplifier).
Outlet selector 27
In brief, outlet selector 27 only is one of to choose in conversion auxiliary audio signal 260 and the sound signal 8 as audio output signal 12.Yet when the user selects DVD player 3, sound signal 8 at this moment, there is no providing of auxiliary audio signal 10 through choosing as audio output signal 12, even if providing of conversion auxiliary audio signal 260 is provided; Otherwise when the user selects auxiliary source 5, sound signal 10 is through choosing as audio output signal 12, and interface control circuit 2 can be via second control bus 7, and indication DVD player 3 shuts down, so the providing of absence of audio signal 8.Therefore, outlet selector 27 only needs to be arranged between the signal path of auxiliary audio signal 260 and sound signal 8 with some conies, can obtain the effect that direct current blocks (DC blocking).In addition, outlet selector 27 also can be realized by bipolarity junction transistor (bipolar junction transistor), couple the transistorized collection utmost point of a PNP and base stage respectively with auxiliary audio signal 260 and sound signal 8, and produce audio output signal 12 from its emitter-base bandgap grading.
Please refer to Fig. 3, be depicted as control flow chart according to the utility model one preferred embodiment.As shown in Figure 3, at first, detect the user in step 30 and whether push the laser disc broadcast button, to choose DVD player 3 functions at stereophony main control system 1.If not, possible user still using the AM/FM tuner broadcast listening or the sound of use audiotape cassette player playback band, then makes control flow return back to step 30, continues to detect the user and whether presses the laser disc broadcast button.In case the user pushes the laser disc broadcast button on the stereophony main control system 1, expression user desire is used the function of DVD player 3, even if carry out step 31, detects auxiliary activation device 24 and whether produces auxiliary enable signal 240.If detect the generation of not having auxiliary enable signal 240 in step 31, then carry out step 32, interface control circuit 2 makes DVD player 3 entrys into service via second control bus 7, and with the sound signal 8 that DVD player 3 is produced, becomes audio output signal 12 via interface control circuit 2 outputs.
If detect the generation that auxiliary enable signal 240 is arranged in step 31, then carry out step 34, interface control circuit 2 makes DVD player 3 shut down via second control bus 7, via interface control circuit 2 sound signal 10 that auxiliary source 5 is produced is exported, as audio output signal 12.If with regard to many auxiliary sources 5A, 5B, 5C, under the applicable cases of 5D, then before carry out step 34, earlier utilize former stereophony main control system 1 to choose the function of CD-RW discsCD-RW (being with regard to having the DVD player that changes the sheet function) in step 33, utilize the function of choosing video disc by the user at stereophony main control system 1, to select numerical value to be sent to interface control circuit 2 via first control bus 6, again by the treater 20 of interface control circuit 2, produce corresponding assisted Selection signal 200 and give auxilary selector 25, even if auxilary selector 25 can be according to assisted Selection signal 200, choose auxiliary audio signal 10A, 10B, 10C, output one of among the 10D etc., follow-up again through position quasi converter 26 and outlet selector 27 processing, promptly become audio output signal 12.And after completing steps 32 or step 34, all audio output signal 12 is sent to stereophony main control system 1 place, through after the Audio Signal Processing, and in loud speaker (not shown) sound is offered the user and listen to.
Please refer to Fig. 4, be depicted as block schematic diagram according to automobile-used another preferred embodiment of AV device of the present utility model.Compare with the automobile-used AV device of Fig. 1, the vision signal 9 and 11 of Fig. 4 all is coupled to interface control circuit 2, and after choosing through interface control circuit 2 works one, the side becomes outputting video signal 13, is sent to display screen 4 and shows.And the mode of selection vision signal 9 and 11 is identical or similar with selection sound signal 8 and 10, is not giving unnecessary details in this event.
In addition, with regard to mechanism, interface control circuit 2 can be designed to single module after, be fixed in the side or the back side of stereophony main control system 1 or DVD player 3.Preferable, be the place, the back side that the interface control circuit module is bonded to DVD player 3, be beneficial to install.
In addition, the known mode that DVD player 3 and stereophony main control system 1 are directly coupled can be limited to the compatible problem of hardware interface between the two, and need choose by compatible DVD player 3.Can solve such consistency problem and interface control circuit of the present utility model 2 is suitable,, all can be coupled to therebetween by interface control circuit 2 no matter whether the hardware interface of 1 of DVD player 3 and stereophony main control system is compatible.And interface control circuit 2 of the present utility model can provide the extended function of two or more auxiliary sources 10, so under the situation of no existing DVD player 3, interface control circuit 2 of the present utility model is still applicable.
Comprehensively above-mentioned, the utility model is not changing under the prerequisite of original stereophony main control system 1 and existing DVD player 3 circuits, and can obtain the purpose that auxiliary source expands.According to the utility model, be the control path that utilizes former DVD player, with the simulator of interface control circuit 2 simulations, also utilize the selection in the corresponding paired many auxiliary audio signals of the circuit source of changing video disc as DVD player 3.And with FM modulation/demodulation or electromagnetic conversion, the automobile-used AV device and the control circuit thereof of the extendible auxiliary source of the utility model can provide high-quality, undistorted, easy expansion signal source extended mode compared to known.
Though the utility model discloses as above with some preferred embodiments; yet it is not in order to limit the utility model; anyly have the knack of the personnel of present technique in not breaking away from spirit and scope of the present utility model; all equivalence changes or equivalence is replaced when making, and therefore protection domain of the present utility model is when looking being as the criterion that accompanying Claim defines.
Claims (23)
1. an automobile-used AV device is characterized in that, comprising:
One existing signal source is in order to produce an existing sound signal;
One auxiliary source is in order to produce an auxiliary audio signal;
One interface control circuit, be coupled to this existing signal source and this auxiliary source, receive this existing sound signal and this auxiliary audio signal respectively, and required according to a user, one of choose in this existing sound signal and this auxiliary audio signal as an output audio signal; And
One stereophony main control system is coupled to this interface control circuit, after receiving this output audio signal, is treated as voice output.
2. automobile-used AV device as claimed in claim 1 is characterized in that, also comprises a display screen, receives the existing vision signal that this existing signal source produces.
3. automobile-used AV device as claimed in claim 2 is characterized in that, this display screen also receives the auxiliary video signal that this auxiliary source produces.
4. automobile-used AV device as claimed in claim 1, it is characterized in that, also comprise a display screen, be coupled to this interface control circuit, one of to receive in existing vision signal that this existing signal source produced and the auxiliary video signal that this auxiliary source was produced.
5. automobile-used AV device as claimed in claim 1 is characterized in that, this interface control circuit comprises:
One treater couples this stereophony main control system and this existing signal source; And
One auxiliary activation device is that what produce an auxiliary enable signal has not according to whether the choosing of this subsidiary signal; Should auxiliary enable signal after this treater receives, can be with this existing signal source forbidden energy, and make this auxiliary audio signal that this auxiliary source produces as this output audio signal.
6. automobile-used AV device as claimed in claim 5 is characterized in that, also comprises an auxilary selector; When this auxiliary source provided a plurality of auxiliary audio signal, this treater can produce an assisted Selection signal,, one of was chosen in this auxiliary audio signal and to select auxiliary audio signal as one according to this assisted Selection signal by this auxilary selector.
7. automobile-used AV device as claimed in claim 6 is characterized in that, also comprises a quasi converter, should select auxiliary audio signal to be treated as a conversion auxiliary audio signal.
8. automobile-used AV device as claimed in claim 7 is characterized in that, also comprises an outlet selector, gives this stereophony main control system in order to one of to choose in this conversion auxiliary audio signal and this existing sound signal to provide as this output audio signal.
9. automobile-used AV device as claimed in claim 5 is characterized in that, also comprises an indicating device; When this auxiliary enable signal produced, this treater can produce an indicator signal and give this indicating device.
10. automobile-used AV device as claimed in claim 5 is characterized in that, comprises that also a filter is coupled between this treater and this stereophony main control system.
11. automobile-used AV device as claimed in claim 5 is characterized in that, comprises that also another filter is coupled between this treater and this existing signal source.
12. an interface control circuit is applicable in the automobile-used AV device, can be coupled to an existing signal source and an auxiliary source, receives an existing sound signal and an auxiliary audio signal respectively; It is characterized in that this interface control circuit comprises:
One treater couples this existing signal source; And
One auxiliary activation device, according to whether choosing of this subsidiary signal, what produce an auxiliary enable signal has not; Should auxiliary enable signal after this treater receives, can be with this existing signal source forbidden energy, and make this auxiliary audio signal that this auxiliary source produces as an output audio signal; Otherwise, can be with this existing sound signal as this output audio signal.
13. interface control circuit as claimed in claim 12 also comprises two auxilary selectors; When this auxiliary source provided a plurality of auxiliary audio signal, this treater can produce an assisted Selection signal, by this auxilary selector according to this assisted Selection signal, choose in this auxiliary audio signal one of select auxiliary audio signal as one.
14. interface control circuit as claimed in claim 13 is characterized in that, also comprises a quasi converter, should select auxiliary audio signal to be treated as a conversion auxiliary audio signal.
15. interface control circuit as claimed in claim 14 is characterized in that, also comprises an outlet selector, gives a stereophony main control system in order to one of to choose in this conversion auxiliary audio signal and this existing sound signal to provide as this output audio signal.
16. interface control circuit as claimed in claim 15 is characterized in that, comprises that also a filter is coupled between this treater and this stereophony main control system.
17. interface control circuit as claimed in claim 15 is characterized in that, comprises that also another filter is coupled between this treater and this existing signal source.
18. automobile-used AV device as claimed in claim 12 is characterized in that, also comprises an indicating device; When this auxiliary enable signal produced, this treater can produce an indicator signal and give this indicating device.
19. an automobile-used AV device is characterized in that, comprising:
At least two auxiliary sources are in order to produce one first auxiliary audio signal and one second auxiliary audio signal;
One interface control circuit, be coupled to this auxiliary source, receive this first auxiliary audio signal and this second auxiliary audio signal respectively, and required according to a user, one of choose in this first auxiliary audio signal and this second auxiliary audio signal as an output audio signal; And
One stereophony main control system is coupled to this interface control circuit, after receiving this output audio signal, is treated as voice output.
20. automobile-used AV device as claimed in claim 19 is characterized in that, also comprises a display screen, receives one first auxiliary video signal and one second auxiliary video signal that this auxiliary source produces.
21. automobile-used AV device as claimed in claim 19 is characterized in that, also comprises a display screen, is coupled to this interface control circuit, one of to receive in one first auxiliary video signal that this auxiliary source produced and one second auxiliary video signal.
22. automobile-used AV device as claimed in claim 19 is characterized in that, this interface control circuit comprises:
One treater couples this stereophony main control system, and selects to produce an assisted Selection signal according to a user; And
One auxilary selector according to this assisted Selection signal, one of is chosen in this first auxiliary audio signal and this second auxiliary audio signal as this output audio signal.
23. an interface control circuit is applicable in the automobile-used AV device, can be coupled at least two auxiliary sources, receives one first auxiliary audio signal and one second auxiliary audio signal respectively; It is characterized in that this interface control circuit comprises:
One treater selects to produce an assisted Selection signal according to a user; And
One auxilary selector according to this assisted Selection signal, one of is chosen in this first auxiliary audio signal and this second auxiliary audio signal as an output audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256442 CN2630045Y (en) | 2003-04-30 | 2003-04-30 | Vehicular audio-video apparatus capable of expanding auxiliary signal source and interface control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256442 CN2630045Y (en) | 2003-04-30 | 2003-04-30 | Vehicular audio-video apparatus capable of expanding auxiliary signal source and interface control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2630045Y true CN2630045Y (en) | 2004-08-04 |
Family
ID=34295435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03256442 Expired - Lifetime CN2630045Y (en) | 2003-04-30 | 2003-04-30 | Vehicular audio-video apparatus capable of expanding auxiliary signal source and interface control circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2630045Y (en) |
-
2003
- 2003-04-30 CN CN 03256442 patent/CN2630045Y/en not_active Expired - Lifetime
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