CN102984625B - Car audio system and its control method - Google Patents
Car audio system and its control method Download PDFInfo
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- CN102984625B CN102984625B CN201210278379.3A CN201210278379A CN102984625B CN 102984625 B CN102984625 B CN 102984625B CN 201210278379 A CN201210278379 A CN 201210278379A CN 102984625 B CN102984625 B CN 102984625B
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
- H04H20/62—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast for transportation systems, e.g. in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
- H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/18—Aspects of broadcast communication characterised by the type of broadcast system in band on channel [IBOC]
- H04H2201/183—FM digital or hybrid
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/18—Aspects of broadcast communication characterised by the type of broadcast system in band on channel [IBOC]
- H04H2201/186—AM digital or hybrid
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Car audio system of the present invention includes：The analogue audio frequency generating unit that simulation radio signals generate simulated audio signal is received from analog broadcasting net;The DAB generating unit that digital broadcast signal generates digital audio and video signals is received from digital broadcast networks;The intensity of above-mentioned simulated audio signal and above-mentioned digital audio and video signals is contrasted, output can be to the audio frequency control portion of the control signal of the higher audio signal of auto loud hailer output intensity;And according to above-mentioned control signal, mutually change the output and the output of above-mentioned digital audio and video signals of above-mentioned simulated audio signal, the audio signal for making auto loud hailer output intensity higher, and the technical characteristic of the output audio treatment part of synchronization process etc. is done to above-mentioned simulated audio signal and above-mentioned digital audio and video signals.
Description
Technical field
It is the broadcast system for controlling automobile audio specifically the present invention relates to car audio system and its control method,
The car audio system and its control method of Best Sound service are provided.
Background technology
In general, the car audio system installed in automotive interior provides operating Traffic Information, meteorological letter
The audio or video information of the information such as breath, various news, meets a variety of demands of driver.
This car audio system is to include making the antenna of reception electric wave with tuner, the magnetic of the selected channel people having the same aspiration and interest
Band, CD (Compact Disc, CD) and DAT (Digital Audio Tape, digital sound tape) etc. can play various
The player for the audio included in record media, preamplifier, main amplifier and the equilibrium that the audio signal exported can be amplified
, can be in this space of automobile including the various amplifiers such as device, the loudspeaker for the source of sound that can be exaggerated with audio form output
The equipment that source information is provided.
Herein, on improve car audio system output audio signal in, by radio broadcasting net provide it is wireless
The sound Quality Research of electric broadcast singal is just widely paid close attention to.
For example, according to the strong subjective intention of the expectation to digital broadcasting and government, broadcast market from now on will be from simulation
Radio broadcasting (FM/AM) is transformed into digital broadcasting (Digital Audio Broadcasting, DAB).
The advantage of digital broadcasting be can eliminate simulation radio broadcasting in white noise and noise there is provided higher quality
Tonequality, this just illustrates that consumer can listen to more channel numbers, noise-free program.
Thus, predicted figure of being not difficult broadcast market will be increasing, and its research field is also going from strength to strength from nineteen ninety,
Nowadays there is numerous radio networks, and the product developed for radio broadcasting.
In addition, the research at present to digital broadcasting divisions is very active, the advantage of digital broadcast networks, digital broadcasting are highlighted
Use scope also expand therewith.
But, the subordinate relation between traditional analog radio broadcasting can not be still broken away from, therefore, Radio, Film and Television Administration will be tradition
Simulate radio broadcasting net and provide same services with digital broadcast networks.So, it is necessary to which one kind is available for user wide in simulation
Broadcast and digital broadcasting between unrestricted choice new system.
In traditional system, simulation radio broadcasting system and each self-starting of digital broadcasting, although for chassis supply
Service, but without continuity.
Therefore, any conversion is not formed between simulation radio broadcast service and digital broadcast service, so as to simulate
The inconvenience such as sound interruption when radio broadcast service is mutually changed with digital broadcast service.
The content of the invention
Technical problem
According to embodiments of the present invention, the car audio system that can transmit high-quality radio broadcasting and its control are provided a user
Method processed.
In addition, according to embodiments of the present invention there is provided car audio system and its control method, making digital broadcasting and simulation nothing
It can continue mutually to change glibly between line electricity broadcast.
Technical scheme
The car audio system of the present invention includes：Simulation radio signals generation analog audio is received from analog broadcasting net
The analogue audio frequency generating unit of frequency signal;The digital sound that digital broadcast signal generates digital audio and video signals is received from digital broadcast networks
Frequency generating unit;The intensity of above-mentioned simulated audio signal and above-mentioned digital audio and video signals is contrasted, output can be exported to auto loud hailer
The audio frequency control portion of the control signal of the higher audio signal of intensity;And according to above-mentioned control signal, mutually change above-mentioned simulation
The output and the output of above-mentioned digital audio and video signals of audio signal, the audio signal for making auto loud hailer output intensity higher, and
The output audio treatment part of synchronization process is done to above-mentioned simulated audio signal and above-mentioned digital audio and video signals.
Above-mentioned analogue audio frequency generating unit is characterised by：At analog broadcasting audio including generating above-mentioned simulated audio signal
Reason portion, and above-mentioned simulated audio signal output point and above-mentioned digital audio and video signals output point can be done synchronization process, can protect
Deposit the buffer of above-mentioned simulated audio signal.
Above-mentioned DAB generating unit is characterised by：At digital broadcast audio including generating above-mentioned digital audio and video signals
Reason portion, and synchronization process is done to above-mentioned digital audio and video signals output point and above-mentioned simulated audio signal output point, and preserve
State the buffer of digital audio and video signals.
The above-mentioned simulation radio signals that above-mentioned analog broadcasting net is sent with above-mentioned digital broadcast networks and above-mentioned numeral
Broadcast singal is characterised by：The identical broadcasts sent from identical broadcasting station.
Above-mentioned analogue audio frequency generating unit is characterised by：Receiving area according to signal can the above-mentioned simulation radio of auto-changing
The corresponding radio broadcast channel of broadcast singal.
The control method of car audio system of the present invention includes：Digital broadcast signal output numeral is received from digital broadcast networks
First process of audio signal;The second process of simulation radio signals is received from analog broadcasting net;Sense above-mentioned number
3rd process of word broadcast signal strength and above-mentioned simulation radio signals intensity;If above-mentioned digital broadcast signal
Intensity is less than certain grade, and simulated audio signal is done with above-mentioned simulation radio signals according to above-mentioned digital audio and video signals
4th process of synchronization process;And above-mentioned digital audio and video signals are converted into the 5th mistake of above-mentioned simulated audio signal output
Journey.
If above-mentioned simulated audio signal intensity is less than certain grade, it must increase and be converted into above-mentioned simulated audio signal
State digital audio and video signals and the process exported.
The above-mentioned simulation radio signals that above-mentioned analog broadcasting net is exported with above-mentioned digital broadcast networks and above-mentioned numeral
Broadcast signals feature is：The identical broadcasts sent from identical broadcasting station.
Above-mentioned second process feature is：Receive the radio broadcast channel equivalent to above-mentioned simulation radio signals
Link information.
The strength grade of the intensity of above-mentioned digital broadcast signal or above-mentioned simulation radio signals is characterised by：According to
The error message change of signal to noise ratio (Signal to Noise Ratio, SNR) information and packing (Packet).
Beneficial effect
Car audio system of the present invention and its control method can realize digital broadcasting and simulation radio broadcasting it
Between the free of discontinuities, technique effect mutually changed glibly.
Moreover, it relates to car audio system and its control method can improve the intensity of radio signals,
To user it is accurate, broadcast program is stably provided.
Moreover, it relates to car audio system and its control method can not make the feelings of operation bidirectional in driver
Optimal radio broadcasting is provided under condition, convenience is improved.
Brief description of the drawings
Fig. 1 is the drawing of the embodiment of car audio system structure one of the present invention；
Fig. 2 is the precedence diagram of the embodiment of car audio system control method one of the present invention；
Fig. 3 is shown according to mutually conversion between the simulation radio broadcasting of further embodiment of the present invention explanation and digital broadcasting
The drawing of example；
Fig. 4 is according to embodiments of the present invention, it is illustrated that the drawing of simulation radio broadcasting net and one example of digital broadcast networks.
Description of reference numerals
100:Export audio treatment part 110:Analogue audio frequency generating unit
120:DAB generating unit 130:Audio frequency control portion
140:Output section 150:Channel database.
Embodiment
Hereinafter, in order to make the personnel for possessing the usual knowledge of the technical field of the invention easily implement the present invention, with reference to
Accompanying drawing of the embodiment of the present invention elaborates.But, interest field of the present invention is not limited in following embodiments.Moreover, saying
Same section addition same-sign, omits repeat specification during the bright present invention.
Car audio system of the present invention can adjust the certain frequency modulation of audio signal according to car engine status information and lead
The output level in domain, the audio signal of more accurate, high-quality is provided to driver.Implemented according to car audio system one of the present invention
Structure such as Fig. 1 of example.
Fig. 1 is the drawing of the embodiment of car audio system structure one of the present invention.
Such as Fig. 1, the embodiment of car audio system one of the present invention includes analogue audio frequency generating unit 110, DAB generating unit
120th, output audio treatment part 100, audio frequency control portion 130, output section 140 and channel database 150.
Analogue audio frequency generating unit 110 includes analog broadcasting audio treatment part 111, buffer 112, FM tuners 113 and AM
Tuner 114.
FM tuners 113 are can be according to the BW broadcasting wave frequency modulation needed for FM radio broadcastings, and electric wave needed for selecting simultaneously is broadcast
The tuner put.
AM tuners 114 are can be according to the BW broadcasting wave frequency modulation needed for AM radio broadcastings, and electric wave needed for selecting simultaneously is broadcast
The tuner put.
Analog broadcasting audio treatment part 111 can receive simulation radio signals from analog broadcasting net, generate analog audio
Frequency signal.
Buffer 112 can preserve simulated audio signal and adjust the output point of simulated audio signal, can be with digital sound
Frequency signal is exported simultaneously.
DAB generating unit 120 include digital broadcast audio processing unit 121, buffer 122, DAB tuners 123 and
DRM tuners 124.
DAB tuners 123 are can be according to the BW broadcasting wave frequency modulation needed for DAB radio broadcastings, and electric wave needed for selecting is simultaneously
The tuner of broadcasting.
Here, the mould that DAB (Digital Audio Broadcasting, digital audio broadcasting) and tradition AM and FM is broadcasted
Plan mode is different, is the service compressed, played with data signal form, also referred to as " digital audio broadcasting ".
Can significantly be expanded using DAB (Digital Audio Broadcasting, digital audio broadcasting) can use it is identical
The channel number in frequency modulation region.It can also relaying CD (Compact Disc, CD), DAT (Digital with digitized forms
Audio Tape, digital sound tape) and play the sound of the high-quality such as live broadcast.So, the moving body such as automobile
The audio signal of high-quality can be received.
Additional Services including a variety of digital information receive capabilities such as word or image, video can be particularly provided.
DAB (Digital Audio Broadcasting) is using television broadcasting or the two ways of satellite, typically
Using Europe it is outstanding in card and IBOC (In-Band On-Channel) mode in the U.S..
DAB (Digital Audio Broadcasting) is European You Lika (Eureka:High-tech joint development meter
Draw) the project of ' 147 ', since 1987 develop.The BBC of Britain implements DAB (Digital Audio from nineteen ninety-five
Broadcasting) broadcast, Germany and Canada were also broadcasted from 1999 using DAB.
DRM tuners (124) are the broadcast electricity according to DRM (Digital Radio Mondiale) radio reception
Ripple frequency modulation, the tuner of electric wave and broadcasting needed for selection.
Herein, DRM (Digital Radio Mondiale) refers to short in being used below 30 in bandwidth range
The digital audio broadcast standard of ripple broadcast or the group for formulating standard.
It can be that the tonequality of FM monophonic levels and a variety of digital broadcastings provide service, turn using original modulating bandwidth
Change digital broadcasting into.
If including music, compress mode can use MPEG-4 AAC+ (Moving Picture Experts Group-4
Advance Audio Coding Plus), low bit rate based on audio MPEG-4 CELP (Moving can be used
Picture Experts Group-4 Code Excited Linear Prediction) and MPEG-4 HVXC (Moving
Picture Experts Group-4 Harmonic Vector Excitation Coding)。
Transmission mode uses OFDM (Orthogonal Frequency Division Multiplexing), modulation system
Using QAM (Quadrature Amplitude Modulation), but can be between 16QAM and 64QAM according to channel state
Select, the bandwidth that different regions, different modulating bandwidths are used is different, and 4.5,9,18 bands may be selected in South Korea
It is wide.
Digital broadcast audio processing unit 121 receives digital broadcast signal from digital broadcast networks, generates digital audio and video signals.
Buffer 122 preserves above-mentioned digital audio and video signals, and adjusts the output point of digital audio and video signals, can be with simulation
The audio signal same period exports.
Audio frequency control portion 130 can the intensity of simulated audio signal that generates of comparative simulation audio generating unit 110 and digital sound
The intensity for the digital audio and video signals that frequency generating unit 120 is generated.
For example, audio frequency control portion 130 can be according to signal to noise ratio (Signal to Noise Ratio, SNR) information and packing
(Packet) error message senses the intensity and digital audio and video signals intensity of simulated audio signal.
Here, audio frequency control portion 130 can be raised one's voice with comparative simulation audio signal and digital audio and video signals, generation to automobile
The control signal of the higher audio signal of device output intensity.
For example, the simulation radio signals that send of analog broadcasting net and digital broadcast networks and digital broadcast signal be from
During the identical broadcasts that identical broadcasts radio station is sent, if audio frequency control portion 130 senses simulated audio signal or DAB letter
The audio signal strength exported at present by output section in number is less than certain grade, can make to the output output of audio treatment part 100
The control signal that the output of simulated audio signal and the output of digital audio and video signals are mutually changed.
If for example, the radio broadcasting of auto loud hailer output at present is simulated audio signal, while this analog audio
The radio broadcasting intensity of frequency signal is less than certain grade, and audio frequency control portion 130 will be exported to output audio treatment part 100 can be by
The radio broadcasting simulated audio signal of auto loud hailer output is converted into the control signal of digital audio and video signals.
If the radio broadcasting intensity of digital audio and video signals is less than certain grade, opposite situation can also be realized.
Therefore, output audio treatment part 100 can be according to above-mentioned control signal to simulated audio signal and digital audio and video signals
Synchronization process is done, the explanation on this respect will be described later.
Export the mutual converting analogue audio of control signal that audio treatment part 100 can be exported according to audio frequency control portion 130
Signal and digital audio and video signals.
For example, output audio treatment part 100 can do synchronization process to simulated audio signal and digital audio and video signals.
That is, if digital broadcast signal, export the compressible data of audio treatment part 100 and transmit, digital broadcast audio
Processing unit 121 exports digital audio and video signals after receiving these data decodings.At this moment, compress or recover digital audio and video signals in the presence of
Between on postponement, there is difference in simulated audio signal and output point.
Therefore, analogue audio frequency generating unit 110 and DAB generating unit 120 can be right by respective buffer 112,122
Simulated audio signal does synchronization process with digital audio and video signals.Thus, the sustainable digital audio and video signals that perform glibly are to simulation
The switching motion of audio signal, simulated audio signal to digital audio and video signals.
Here, analogue audio frequency generating unit 110 can receive area, automatic change simulation radio signals phase according to signal
The radio broadcast channel answered.For example, in prior trivial point of the base area of preservation of channel database 150 equivalent to identical simulation nothing
Multiple simulation radio broadcast channels of line electricity broadcast, induced signal receives area and is altered to channel corresponding with this automatically.
So as to, car audio system of the invention from digital broadcast signal and analog broadcasting by induced signal intensity in signal
Stronger signal, prior mutual conversion free of discontinuities, can provide the radio broadcasting of high-quality, moreover it is possible to improve the facility of driver
Property there is provided more accurate, stable broadcast service.
Fig. 2 is the precedence diagram of the embodiment of car audio system control method one of the present invention.
Such as Fig. 2, digital broadcasting is selected first, is performed from digital broadcast networks reception digital broadcast signal and is exported DAB
The first process (S210) of signal.
Hereafter, simulation radio signals are received from analog broadcasting net.Received for example, performing equivalent to simulation radio
According to the 3rd mistake of this information tuning after the second process (S220) and reception channel link information of the channel link information of broadcast
Journey (S230).
Hereafter, as one of the broadcast currently exported, the signal intensity of the above-mentioned digital broadcasting of sensing is performed, that is, senses number
4th process (S240) of word broadcast signal strength.
Here, the intensity of above-mentioned digital broadcast signal can be sensed, and simulates the intensity of radio signals.
Hereafter, the 4th process (S250) for judging whether digital broadcast signal intensity is less than certain grade is performed.
Now, if the 4th process (S250) judgment result displays digital broadcast signal intensity exceedes certain grade (no
It is), then continue to export digital audio and video signals according to digital broadcast signal, sense the intensity of digital broadcast signal.
If the 5th process (S250) judgment result displays digital broadcast signal intensity is less than certain grade (YES), perform
It is converted into simulating radio signals, and simulated audio signal is exported by output section according to simulation radio signals
6th process (S260).
Hereafter, perform and judge to simulate the 7th process (S270) whether radio signals intensity is less than certain grade.
Now, if the 7th process (S270) judgment result displays simulation radio signals intensity exceedes certain grade
(not being), then always according to simulation radio signals output simulated audio signal, and sense simulation radio signals
Intensity until user select untill.
If the 7th process (S270) judgment result displays simulation radio signals intensity is less than certain grade (YES),
Then come back to digital broadcasting selection mode (S210) and be converted into digital broadcast signal, according to digital broadcast signal, pass through output
Portion's output digital audio and video signals (S210).
Broadcasting station same as below each sends simulation radio signals using analog broadcasting net and digital broadcast networks
With digital broadcast signal, when playing identical broadcasts, if sensing the simulated audio signal or number that are exported by output section at present
Audio signal strength in word audio signal is less than certain grade, and refer to the attached drawing 3 illustrates that simulated audio signal is believed with DAB
Number process mutually changed.
Fig. 3 is shown according to mutually conversion between the simulation radio broadcasting of further embodiment of the present invention explanation and digital broadcasting
The drawing of example.
Such as Fig. 3, intensity and simulation of the automotive interior in traveling according to the digital broadcast signal (DAB) of time change are shown
The intensity of radio signals (FM).
Driver selects digital broadcasting, receives digital broadcast signal from digital broadcast networks, number is exported by output section
Word audio signal.
At the same time, channel link information corresponding with simulation radio broadcasting is received, according to corresponding channel link information
Tuning.
Hereafter, the intensity of the signal intensity, i.e. digital broadcast signal of the digital broadcasting that sensing is currently exported.
In addition, the intensity of simulation radio signals can also be sensed in addition to above-mentioned digital broadcast signal intensity.
Here, the strength grade of digital broadcast signal, and the strength grade of simulation radio signals can be according to letter
Make an uproar and changed than error message of (Signal to Noise Ratio, SNR) information and packing (Packet) etc..
Hereafter, if digital broadcast signal intensity is less than certain grade (S1), digital broadcasting can mutually be changed by being transformed into
Signal output and the pattern of simulation radio signals output.
That is, " the convertible service area " in Fig. 3 is identified as convertible digital broadcast signal output and simulation radio is wide
The pattern of signal output is broadcast, intensity and the simulation radio broadcasting of digital broadcast signal are persistently sensed in this convertible service area
The intensity of signal, makes it mutually to change at any time.
If for example, digital broadcast signal intensity be less than S1 ranks, conversion to sensing digital broadcast signal intensity and
The pattern simulated the intensity of radio signals and contrasted, passes through higher wireless of output section output signal receiving intensity rank
The audio signal of electric broadcast singal.
Also, persistently contrast digital broadcast signal intensity and simulation radio signals intensity, identical with signal intensity
Initial point (S4) be standard, in order to improve signal receiving strength, by digital broadcast signal or simulation radio signals each
It is converted into simulation radio signals or digital broadcast signal.
Here it is possible to do synchronization process to simulated audio signal and digital audio and video signals.That is, find simulated audio signal and
Digital audio and video signals identical broadcast singal initial point, if output point has differences, postpones some wireless using buffer
Electric broadcast singal, enables both to export same broadcast signal in the same time.
So, can with it is free of discontinuities, simulated audio signal or digital audio and video signals be converted into DAB glibly
Signal or simulated audio signal.
Fig. 4 is according to embodiments of the present invention, it is illustrated that the figure of an example of simulation radio broadcasting net and digital broadcast networks
Paper.
Such as Fig. 4, it is illustrated that by taking digital broadcasting as an example, output DAB SWR3 in Rheinland-Pfalz broadcast, and
By taking analog broadcasting as an example, the system of output FM-RDS SWR3 broadcast.
Such as Fig. 4, digital broadcasting (DAB is being received:SWR3 in Rheinland-Pfalz) during if numeral
Broadcast signal strength is less than certain grade, then digital broadcast signal output and simulation radio broadcasting letter can mutually be changed by being transformed into
Number output pattern, persistently sense digital broadcast signal intensity and simulation radio signals intensity.
Now, if it is determined that digital broadcast signal intensity is then formed from numeral better than simulation radio signals intensity
Broadcast (DAB:SWR3 in Rheinland-Pfalz) it is transformed into analog broadcasting (FM-RDS:SWR3 service)
(Service Following)。
Thus, the control method of car audio system according to an embodiment of the invention does not need the operation of user additionally,
With regard to that can obtain, radio signals are uninterrupted, high-quality radio broadcasting.
Moreover, the car audio system and its control method of the present invention can improve the intensity of radio signals, can be
More accurate, stabilization broadcast that user provides, greatly improves convenience for users.
Thus, car audio system of the invention and its control method can be reached in the case where operation bidirectional is not carried out
The superior and multifunction of automobile inner multimedia, realizes the maximization of driver convenience's property, and provides high-quality, reliable sound
Frequency signal, is necessary to while using publicization broadcasted for above two interior at this stage of analog broadcasting and digital broadcasting
Technology.
Thus, car audio system of the invention and its control method can according to the signal intensity of simulation radio broadcasting and
There is provided radio broadcasting that is free of discontinuities, can mutually changing for the signal intensity of digital broadcasting, it is believed that passes through such vapour
The technological thought of the invention and any form for thus changing that car sound system is presented belong to scope.
More than, the invention that present inventor provides is specifically described according to above-described embodiment, but the present invention and not only
It is limited to above-described embodiment, numerous variations can be done in the range of without departing from its main points.
Claims (8)
1. a kind of car audio system, including：Simulation radio signals generation analogue audio frequency letter is received from analog broadcasting net
Number analogue audio frequency generating unit；
The DAB generating unit that digital broadcast signal generates digital audio and video signals is received from digital broadcast networks；
Above-mentioned simulated audio signal intensity and above-mentioned digital audio and video signals intensity are contrasted, and exporting can make auto loud hailer output strong
The audio frequency control portion of the control signal of the higher audio signal of degree；And
Mutually changed according to above-mentioned control signal, the output and the output of above-mentioned digital audio and video signals of above-mentioned simulated audio signal,
Synchronization process is done to above-mentioned simulated audio signal and above-mentioned digital audio and video signals, the audio for making auto loud hailer output intensity higher
The output audio treatment part of signal,
Above-mentioned analogue audio frequency generating unit include generating the analog broadcasting audio treatment part of above-mentioned simulated audio signal, can realize it is above-mentioned
Simulated audio signal output point is synchronous with above-mentioned digital audio and video signals output point, preserve the buffering of above-mentioned simulated audio signal
Device,
Above-mentioned DAB generating unit include generating the digital broadcast audio processing unit of above-mentioned digital audio and video signals, can realize it is above-mentioned
Digital audio and video signals output point is synchronous with above-mentioned simulated audio signal output point, preserve the buffering of above-mentioned digital audio and video signals
Device.
2. car audio system according to claim 1, it is characterised in that above-mentioned simulation radio signals with it is above-mentioned
Digital broadcast signal is the identical broadcasts sent by identical broadcasts radio station.
3. car audio system according to claim 2, it is characterised in that above-mentioned analogue audio frequency generating unit connects according to signal
Receive the automatic change radio broadcast channel corresponding with above-mentioned simulation radio signals in area.
4. a kind of control method of car audio system, including：Digital broadcast signal, the digital sound of output are received from digital broadcast networks
First process of frequency signal；
The second process of simulation radio signals is received from analog broadcasting net；
Sense the 3rd process of above-mentioned digital broadcast signal intensity and above-mentioned simulation radio signals intensity；
If above-mentioned digital broadcast signal intensity is less than certain grade, wide to above-mentioned digital audio and video signals and above-mentioned simulation radio
The simulated audio signal for broadcasting signal does the 4th process of synchronization process；And
Above-mentioned digital audio and video signals are converted into above-mentioned simulated audio signal and the 5th process exported,
During above-mentioned 4th,
Above-mentioned simulated audio signal is generated by analog broadcasting audio treatment part and is saved in above-mentioned simulated audio signal slow
Device is rushed, to realize that above-mentioned simulated audio signal output point is synchronous with above-mentioned digital audio and video signals output point, or,
Above-mentioned digital audio and video signals are generated by digital broadcast audio processing unit and are saved in above-mentioned digital audio and video signals slow
Device is rushed, to realize that above-mentioned digital audio and video signals output point is synchronous with above-mentioned simulated audio signal output point.
5. the control method of car audio system according to claim 4, it is characterised in that during the above-mentioned 3rd, such as
Really above-mentioned simulated audio signal intensity is less than certain grade, need to increase above-mentioned simulated audio signal being converted into above-mentioned DAB
Signal and the process exported.
6. the control method of car audio system according to claim 4, it is characterised in that above-mentioned analog broadcasting net with it is upper
The above-mentioned simulation radio signals and above-mentioned digital broadcast signal for stating digital broadcast networks transmission are sent out from identical broadcasting station
The identical broadcasts sent.
7. the control method of car audio system according to claim 4, it is characterised in that during above-mentioned second, connect
Receive radio broadcast channel link information corresponding with above-mentioned simulation radio signals.
8. the control method of car audio system according to claim 4, it is characterised in that above-mentioned digital broadcast signal is strong
Grade or above-mentioned simulation radio signals strength grade is spent according to signal to noise ratio (Signal to Noise Ratio, SNR) to be believed
The error message of breath and packing (Packet) is different.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110089945A KR101748886B1 (en) | 2011-09-06 | 2011-09-06 | Car audio system and control method thereof |
| KR10-2011-0089945 | 2011-09-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102984625A CN102984625A (en) | 2013-03-20 |
| CN102984625B true CN102984625B (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210278379.3A Active CN102984625B (en) | 2011-09-06 | 2012-08-07 | Car audio system and its control method |
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| Country | Link |
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| KR (1) | KR101748886B1 (en) |
| CN (1) | CN102984625B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102092023B1 (en) * | 2013-07-26 | 2020-03-23 | 삼성전자 주식회사 | An electronic device with radio function and operating method thereof |
| CN103763053B (en) * | 2014-01-07 | 2016-08-17 | 株洲南车时代电气股份有限公司 | Broadcast controller and train broadcast control system |
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| KR20130026650A (en) | 2013-03-14 |
| KR101748886B1 (en) | 2017-06-20 |
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