CN102148623A - Automatic updating method for wireless linkage and signal transferring device - Google Patents
Automatic updating method for wireless linkage and signal transferring device Download PDFInfo
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- CN102148623A CN102148623A CN2010101139920A CN201010113992A CN102148623A CN 102148623 A CN102148623 A CN 102148623A CN 2010101139920 A CN2010101139920 A CN 2010101139920A CN 201010113992 A CN201010113992 A CN 201010113992A CN 102148623 A CN102148623 A CN 102148623A
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Abstract
The invention discloses a signal transferring device for receiving an audio signal, and transmitting the audio signal to an object frequency modulation (FM) broadcast receiver in initial frequency after converting the audio signal into an FM broadcast signal; the signal transferring device is provided with a FM receiving device for searching an unused alternative frequency; when the initial frequency is interfered, the signal transferring device transmits the FM signal to the object FM broadcast receiver by automatically using the alternative frequency. The invention further discloses an automatic updating method for a wireless linkage to automatically establish another new wireless linkage when the wireless linkage between the signal transferring device and the object FM broadcast receiver is interfered.
Description
Technical field
The invention relates to a kind of automatic update method of wireless link, refer to a kind ofly when wireless link is interfered especially, set up the automatic update method of another new wireless link automatically.
The present invention more discloses a kind of signal adapting device, refers to a kind ofly when employed frequency is interfered especially, automatically sends the signal adapting device of FM signal with alternative frequency.
Background technology
Along with making rapid progress of numeral science and technology, existing numerous consumption electronic product can be used for playing back music, for example: MP3 player, personal digital assistant (Personal Digital Assistants; PDA), portable media player (Portable Multimedia Player), mobile communications device (MobileCommunication Devices) are as mobile phone (Cellular Telephones) and mobile networked devices (Mobile Intemet Devices; MID), these portable consumption electronic products allow people how easily occasion in office listen to music, have significantly expanded occasion and opportunity that the consumer listens to music program.
When using these consumption electronic products to listen to music, except utilization earphone ways of connecting is listened to, also can come playing back music by the FM broadcast receiver.If when listening to the music that these consumption electronic products play by the FM broadcast receiver, these consumption electronic products are except being connected directly to audio frequency output the audio frequency input of FM broadcasting receiver, also can a built-in or external FM reflector audio signal of its output be changed into the FM signal and launch, receive broadcast by FM broadcasting receiver not far from one another again.Typical application promptly be the music consumption electronic product play by the FM reflector with the FM frequency emission, and then play back by car audio system again after receiving by the FM broadcasting receiver of automobile audio.Basically, the audio signal that the FM reflector is exported consumption electronic product is modulated into FM analogy format signal and carries launches on a carrier wave, and the frequency of this carrier wave carrier frequency without other FM broadcasting stations uses in the FM frequency range.
Same method also can be used in the reception of digital broadcasting.Via effort for many years, the standard of multiple digital broadcasting is formulated successively to finish and begin commerce and is turned round, and the digital broadcasting of these various criterions comprises DAB (Digital Audio Broadcasting), DRM (Digital Radio Mondiale), DMB (DigitalMultimedia Broadcast), IBOC (In-Band On-Channel) or satellite broadcasting etc.Digitization of broadcasting has become the broadcasting dealer provides a more selection of high tone quality and more polynary service, some country even clearly formulate and change the timetable of adopting digital radio comprehensively.In order to want on automobile, to listen to the program of digital broadcasting, except the car audio system of the tool FM receiving function that will be equipped with on original car replaces to the automobile audio of tool digital broadcasting receiving function, also can use a simple digit broadcasting receiver to make it possess a FM emission function or an external independent F M reflector, just the digital broadcast signal that digit broadcasting receiver can be received converts audio signal to, converting audio signal to the FM signal by the FM reflector again launches, and then receive this by the converted FM signal of digital broadcast signal by the FM broadcasting receiver on the automobile, play out by the loudspeaker of automobile audio more at last.
As previously mentioned, launch if will use the FM reflector to convert an input audio signal to the FM signal, receive for contiguous FM broadcasting receiver and to listen to program, must select a carrier frequency that is not used as launching earlier by the frequency of other FM broadcasting stations uses.General way selects not to be used frequency (hereinafter referred to as usable frequency) by the user with manual mode, this mode often need come back operations just can find suitable frequency between FM broadcasting receiver that is used for receiving and FM reflector, for example scan the FM frequency range to find a usable frequency by the FM broadcasting receiver that is used for receiving earlier, the tranmitting frequency of adjusting the FM reflector again is a usable frequency of looking for so far, with the tranmitting frequency of this usable frequency as the FM reflector.
But when said method was applied on the automobile, this mode of manually selecting will cause the inconvenience in the use.This is because vehicle when advancing, when entering another zone from a certain zone, probably can make the frequency that originally is not used and can be used to launch one enter the zone by being used in a certain broadcasting station at this, so if the FM reflector continues emission FM signal with this frequency, then this FM signal FM signal that launched by the broadcasting station disturbs and influences collection of letters quality.Since regulation limitations the transmitting power of FM reflector of consumer electronics purposes, as long as automobile moves on, the FM signal that launch in the broadcasting station will soon cover the signal that the FM reflector is launched.In simple terms, the user can't continue to listen to original music or program.If will continue to listen to original music or program, just must look for new usable frequency separately, again the tranmitting frequency of FM reflector is adjusted to this new usable frequency, again the receive frequency of FM broadcasting receiver is transferred to this new tranmitting frequency and is listened at last.Far and away, the inconvenience in the use can be caused like this, even the problem of traffic safety can be caused.
In view of this, there are many patents to propose the scheme that solves at foregoing problems.For example: United States Patent (USP) numbering 6,493,546 disclose an automatic scan usable frequency, and the behaviour in service of monitoring present tranmitting frequency simultaneously is with prompting user selection and switch to the method and apparatus of a new tranmitting frequency.
TaiWan, China patent of invention I261420 discloses a method that is applied to the automatic searching available frequency of digital broadcasting (DAB) receiving and retransmitting device, by available frequencies in the interior receiving element scanning specific band of building in the retransmission unit, again by user's decision FM frequency whether conduct is launched.
U.S. patent application case US2009/0111389A1 then discloses a method and apparatus that utilizes the quiet period scanning FM frequency range of input audio signal with searching available frequency.
Though aforementioned all patents have proposed the method for the available FM frequency of automatic search respectively, the FM reflector is again with this usable frequency emission FM signal, but still need the receive frequency with manual mode adjustment FM broadcasting receiver by the user, could between audio signal source and FM broadcasting receiver, set up a wireless link, the audio signal that audio signal source is sent is passed through wireless link by the FM reflector, play by the FM broadcasting receiver again.In simple terms, during automobile in being applied to travel, the driver still needs can guarantee that by artificial operation the program of the external audio frequency signal source listened to such as MP3 or digital broadcast program can continue broadcast.
Therefore launch the FM signal if there is a mechanism can search available FM frequency automatically, and the FM receiving system on the guide automobile is transferred to this frequency automatically and is come received signal, so that between FM reflector and FM receiving system, set up a wireless link, can allow the user dial music or any audio program of putting not needing manual operation just can on existing car audio system, continue to listen to the external audio frequency signal source on the automobile.
Summary of the invention
The objective of the invention is to propose a kind of signal adapting device, this signal adapting device can convert the audio signal of an external audio signal source output to the FM signal, and then the FM signal of this conversion launched, this FM signal is played out by automobile audio after being received by the target broadcasting receiver on the automobile again.
Because between automobile carries out, originally be used to the original frequency launched may be when passing through a certain route the tranmitting frequency with other radio station identical or close and disturbed, influence collection of letters quality, this moment is for guaranteeing the good quality of listening to, just must select another FM frequency that is not used to launch, the receive frequency that receives the target broadcasting receiver of FM signal on the automobile also must be adjusted simultaneously, could continue to listen to the audio program of original broadcast.Aforementioned activities is if undertaken by manual operation, will definitely make system for distraction of driver and influences traffic safety.Another object of the present invention is to propose the automatic searching available frequency of a kind of method energy frequency (alternative frequency) as an alternative, and whether detect present FM frequency of just launching by other station interference, when the FM of this emission frequency is disturbed, change signal again with alternative frequency emission FM, guide simultaneously the target broadcasting receiver to change receive frequency immediately, receive audio program with alternative frequency.
For reaching aforementioned purpose, the present invention discloses a kind of signal adapting device, this signal adapting device is in order to received audio signal, and after audio signal is converted to the FM signal, the FM signal is sent to target FM broadcasting receiver, and this signal adapting device comprises FM receiver, processor, radio data system (Radio DataSystem; RDS) encoder and FM reflector, wherein radio data system in some areas also the someone be called RBW Radio Broadcast Data System (Radio Boardcast Data System; RBDS), in this manual only with RDS as general designation.
The FM receiver is in order to receive a plurality of received signals, and at least one action in the RDS information of the received signal intensity index (RSSI) of these received signals of testing, the signal to noise ratio (snr) of checking these received signals and these received signals of retrieval, to produce environmental information.
Processor is electrically connected at the FM receiver, and processor is in order to reception environment information, searches at least one usable frequency according to this classifying alternative frequency as, and judges whether original frequency is disturbed.
The RDS encoder is electrically connected at processor, in order to alternative frequency and relevant information are organized into RDS information.
The FM reflector is electrically connected at RDS encoder and processor, and the FM reflector is in order to received audio signal, and audio signal is modulated into the FM signal that meets FM analogy form after in conjunction with RDS information, and sends the FM signal to target FM broadcasting receiver with original frequency.
Wherein, when processor judged that original frequency is interfered, the FM reflector sent the FM signal to target FM broadcasting receiver with alternative frequency.
The present invention also discloses a kind of automatic update method of wireless link, when being interfered in order to the wireless link between signal adapting device and target FM broadcasting receiver, sets up another new wireless link automatically with the alternative frequency that signal adapting device was searched.
Allow target broadcast reception function without being adjusted to the purpose that new FM frequency receives the FM signal automatically by manual operation in order to reach, the alternative frequency (alternatefrequencies that the present invention further uses RDS and possessed; AF) handover mechanism that provided of sign indicating number with the usable frequency that searches frequency (alternative frequency) as an alternative, and receives the FM signal by the AF sign indicating number notice target broadcasting receiver of RDS to guide it to call in this alternative frequency on specific opportunity.Its practice is attached to alternative frequency in the AF sign indicating number of RDS, and in conjunction with the service identifying information program identification (ProgramIdentification that is relevant to this FM signal; PI) sign indicating number is formed RDS digital information, launch by the FM reflector again, after the RDS of target broadcasting receiver decoder receives and obtains this RDS digital information, can when former receiving channels is collected mail bad or lose the FM signal of original reception, call in this alternative frequency and receive the FM signal.
As previously mentioned, when signal adapting device is detecting former transmitting channel and is being disturbed by other broadcasting stations, can change with alternative frequency and continue to launch FM signal and RDS information, therefore the target broadcasting receiver can't continue to receive the PI sign indicating number that is used for discerning original FM signal at original channel, and target broadcast reception chance starts the defined alternative frequency of RDS immediately and switches (alternate frequency change; AFC) mechanism changes with alternative frequency and receives the FM signal, and detects the PI sign indicating number of whether receiving in the RDS information that original FM signal includes, and is confirming that promptly resting on this alternative frequency after errorless continues reception FM signal.
In simple terms, the present invention is under the situation that does not need manual operation, AFC mechanism via automatic search alternative frequency, detection collection of letters situation and utilization RDS, really can reach under the disturbed situation of original FM tranmitting frequency, automatically be transformed into another alternative frequency and launch the FM signal, and and then guiding target broadcasting receiver receive the FM signal with this alternative frequency, the user can be continued to listen to target from the audio program in outer signal source by automobile audio.
Description of drawings
Fig. 1 implements Organization Chart for the signal converting broadcast system;
Fig. 2 is a specific embodiment of signal adapting device;
Fig. 3 is second embodiment of signal adapting device;
Fig. 4 is the 3rd embodiment of signal adapting device; And
Fig. 5 is the schematic flow sheet of the automatic update method of wireless link of the present invention.
Description of reference numerals
Signal converting broadcast system 10
Signal adapting device 20
DAB receives and switching device 40
Use interface 44
Target broadcasting receiver 50
Mancarried device 70
The automatic update method implementation step of wireless link: 101～107
Embodiment
The present invention discloses a kind of signal adapting device, refers to a kind ofly when employed frequency is interfered especially, automatically sends the signal adapting device of FM signal with alternative frequency.In addition, the present invention more discloses a kind of automatic update method of wireless link, refers to a kind ofly when wireless link is interfered especially, sets up the automatic update method of another new wireless link automatically.Below enumerate three preferred embodiments with explanation the present invention, those of ordinary skills should learn that this only is for example certainly, and are not in order to limit invention itself.The detailed description of relevant this preferred embodiment is as follows.
See also Fig. 1, Fig. 1 implements Organization Chart for the signal converting broadcast system.Signal converting broadcast system 10 has comprised signal adapting device 20 and target broadcasting receiver 50; Wherein, signal adapting device 20 is in order to the audio signal 30 of received audio signal source (figure do not show) output, and after audio signal 30 is converted to FM signal 15, FM signal 15 sent out via the antenna 62 that is connected signal adapting device 20.The FM signal 15 that this sends receives and is sent to target broadcasting receiver 50 via the broadcast receiving aerial on the vehicle 65, and plays by loudspeaker 51.
In other words, when target broadcasting receiver 50 with the frequency of signal adapting device 20 emission FM signals during as receive frequency, promptly set up wireless link at signal adapting device 20 and 50 of target broadcasting receivers with this frequency, allow the audio signal 30 of audio signal source output be able to be sent to target broadcasting receiver 50, play by the loudspeaker 51 that connects target broadcasting receiver 50 again via signal adapting device 20 and wireless link.
Preferably in the present embodiment, target broadcasting receiver 50 and radio data system (Radio DataSystem; RDS) compatible, can receive RDS digital information; Signal adapting device 20 more can have antenna 61, scans the FM frequency ranges in order to receive a plurality of received signals for signal adapting device 20, and then the signal quality of searching available frequency and detection wireless link.
In addition, signal adapting device 20 converts the audio signal 30 that audio signal source sent to meet FM signal format FM signal 15, and is sent by antenna 62 with a predetermined original frequency; Wherein, external audio signal source can be personal digital assistant (Personal Digital Assistant; PDA), mobile communications device such as mobile phone, mobile networked devices (Mobile Internet Device; MID) but, with the device of terrestrial broadcasting radio station, broadcasting-satellite system or any playing back music of radio transmission, wherein, but the device of playing back music comprises CD Player, MP3 player and portable media player (PortableMultimedia Player).
On the other hand, the behaviour in service of 20 persistent surveillance FM of signal adapting device frequency range comprises that searching available frequency is with frequency as an alternative and the signal quality that detects wireless link; Signal adapting device 20 and when the signal quality of wireless link is not good FM signal 15 being changed with alternative frequency sends, and guiding target broadcasting receiver 50 change receive frequencies, call in the FM signal 15 that selected alternative frequency comes received signal switching device 20 to be launched.
Please continue to consult Fig. 2, Fig. 2 is a specific embodiment of signal adapting device 20.Signal adapting device 20 comprises a processor 21, a FM receiver 22, a RDS encoder 23, a FM reflector 24.
Signal adapting device 20 shown in Figure 2 can be the device of an independent running, also can be to realize with integrated circuit or circuit module, be incorporated in the mancarried device (Portable Device), as shown in Figure 3, Fig. 3 is second embodiment of signal adapting device 20.Mancarried device 70 comprises signal adapting device 20, mancarried device 70 receives or handle the audio signal 30 that is produced can set up wireless link 15 via built-in signal adapting device 20 and the target broadcasting receiver 50 on the vehicle, is play by the loudspeaker 51 of receiving target broadcasting receiver 50 again.Further, mancarried device 70 can be PDA, or the device of playing back music such as CD Player, MP3 player, portable media player (PortableMultimedia Player) or mobile communications device such as mobile phone and mobile networked devices (MobileInternet Device; MID).
The audio signal 30 of Fig. 1 can be satellite broadcast signal or the radio broadcasting signal that is derived from ground, therefore disclosed signal adapting device 20 also can be integrated into a digital broadcasting reception and a switching device with digital radio broadcast receiver or satellite broadcast reception converter, with receiving digital broadcast signal, launch after converting thereof into the FM signal again, receive the back via the target broadcasting receiver on the vehicle 50 and play by loudspeaker 51.
See also Fig. 4, Fig. 4 is the 3rd embodiment of signal adapting device 20.Wherein digital broadcasting reception and switching device 40 comprise digital audio broadcasting (Digital Audio Broadcasting; DAB) receiver 41, use interface 44, display screen 45 and signal adapting device 20.
Use interface 44 to use as operation DAB channel selection and system's control for the user, DAB station name and relevant information are then shown by display screen 45.Processor 21 is controlled signal 46 control DAB receivers 41 according to what use interface 44, carries out runnings such as channel selection or broadcast with the wish according to the user, 41 of DAB receivers will station name and other information repayment processor 21 backs show by display screen 45.Be that digital broadcasting reception and switching device 40 receive the DAB broadcast singal via antenna 66, be sent to signal adapting device 20 after converting thereof into audio signal 30, FM reflector 24 via signal adapting device 20 converts FM signal 15 to again, and the judgement of looking 21 pairs of environmental information signals of processor via antenna 62 with original frequency or alternative frequency emission.
In addition, digital broadcasting reception and switching device 40 can be to include a DAB receiver 41 as shown in Figure 4 to receive the DAB signal, also can be the digit broadcasting receiver of other standards, as DRM (DigitalRadio Mondiale), DMB (Digital Multimedia Broadcast; DMB), (the In-Band On-Channel of in-band on-channel system; IBOC) or satellite broadcasting, to receive the digital broadcast signal of various criterion.
Among aforementioned each disclosed embodiment, processor 21 all can be by searching alternative frequency, when employed original frequency is disturbed, to change with alternative frequency emission FM signal 15, and guiding target broadcasting receiver 50 receives with alternative frequency, therefore, the present invention more discloses a kind of automatic update method of wireless link, sees also Fig. 5, and Fig. 5 is the schematic flow sheet of the automatic update method of wireless link of the present invention.The automatic update method of wireless link may further comprise the steps:
Step 101: signal adapting device 20 is that original frequency begins searching available frequency with present tranmitting frequency.
Step 102: signal adapting device 20 is up searched the frequency of a fixing frequency interval by previous frequency, this fixed frequency is different different because of various countries' regulation, for example the U.S. is 200KHz, European countries mostly are 100KHz, when the search frequency reached 108MHz, the next frequency of searching was begun to continue up to search by 87.5MHz.
Step 103: signal adapting device 20 judges according to the signal strength signal intensity (RSSI) of searching the received signal that frequency received whether this frequency is not used, if RSSI is greater than a default critical value, judge that promptly this frequency is used by other broadcast sources, then execution in step 102 continues searching available frequency; If RSSI, promptly judges this frequency less than a default critical value and is not used by other broadcast sources that then execution in step 104.
Step 104: this usable frequency that searches is decided to be alternative frequency, and form the AF sign indicating number of RDS with this alternative frequency, and then with this AF sign indicating number and the program identification PI sign indicating number composition RDS information that is relevant to FM signal 15, after integrating with audio signal 30 again, be modulated into FM signal 15 and launch by FM reflector 24.
Step 105:FM receiver 22 is called in the original frequency of present emission, with the signal to noise ratio (snr) of inspection received signal and received RDS information.
Step 106: if the signal to noise ratio of received signal is greater than a certain default critical value, and the RDS information that receives conforms to the RDS information of emission, then execution in step 101 searching available frequency again; If the signal to noise ratio of received signal is less than a certain default critical value, the RDS information that perhaps receives and the RDS information of emission are not inconsistent, and then represent original frequency to be disturbed, then continue execution in step 107.
Step 107: change the tranmitting frequency of FM reflector 24, and with alternative frequency emission FM signal 15.
Preceding method changes with alternative frequency when former tranmitting frequency is disturbed launches FM signal 15, therefore the target broadcasting receiver 50 that is receiving the FM signal 15 that FM reflector 24 launched can't be continued to receive the program identification PI sign indicating number of this FM signal 15 by the original frequency that uses originally, alternative frequency switching (AFC) mechanism of RDS will be guided target broadcasting receiver 50 according to the AF sign indicating number in the previous RDS information of receiving this moment, change receive frequency in the AF sign indicating number defined alternative frequency by original frequency, the RDS receiving function of target broadcasting receiver 50 is checked the PI sign indicating number in the RDS information that receives earlier, after the FM signal that definite alternative frequency thus receives is same source with the previous FM signal that receives really, again the demodulation of FM signal is made as audio signal, plays by loudspeaker 51.Thus, target broadcasting receiver 50 just can be set up wireless link 15 with signal adapting device 20 once more, and listens to the audio signal 30 of being transferred by signal adapting device 20.
Comprehensive the above, the present invention discloses the automatic update method of a kind of signal adapting device and a kind of wireless link, the audio signal of one external audio signal source can be forwarded to target FM broadcasting receiver on the vehicle with wireless mode, the loudspeaker by vehicle plays out again.On the other hand, when the frequency of original wireless link is disturbed by other broadcast sources, also can be by the automatic update method of disclosed wireless link, launch the FM signal with the alternative frequency that searches automatically, and do not needing under the artificial situation about getting involved, by transmitting the AF sign indicating number and the PI sign indicating number of RDS information, target broadcasting receiver on the guided vehicle starts the alternative frequency handoff functionality, automaticallying switch so far, alternative frequency receives the FM signal, thereby set up new wireless link, guarantee to continue to listen to audio program from external audio signal source with good collection of letters quality.
Each functional unit that aforesaid signal adapting device comprised, comprise processor, FM receiver, RDS decoder, FM reflector and operational function thereof, though can be to realize with the hardware module, but those of ordinary skills should not be difficult to software, hardware or combination in any, include but not limited to be incorporated in the application of an embedded system with software, and by the calculation processing unit such as digital signal processor (the Digital Signal Processor of embedded system; DSP), reduced instruction set computer (Reduced Instruction SetComputing; RISC) processor or microprocessor wait and carry out, or realize Application Specific Integrated Circuit (Application Specific Integrated Circuit with source code; ASIC) or field programmable gate array (FieldProgrammable Gate Array; FPGA) hardware description language (Hardware DescriptionLanguage; HDL) circuit, and any similar techniques realizes this device.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (15)
1. the automatic update method of a wireless link, when being interfered in order to the wireless link between a signal adapting device and a target FM broadcasting receiver, automatically set up another new wireless link, wherein, this signal adapting device has a frequency-modulated transmitter and a fremodyne, and this frequency-modulated transmitter of this signal adapting device is launched a FM signal with an original frequency, and call in this original frequency by this target fm broadcast receiver, to set up this wireless link with this signal adapting device, and receive the action of this FM signal, the automatic update method of this wireless link may further comprise the steps:
Scan a frequency modulation frequency range by this fremodyne, to search at least one usable frequency to classify at least one alternative frequency as;
Launch an alternative frequency signal to this target fm broadcast receiver from this frequency-modulated transmitter with this original frequency, wherein this alternative frequency signal comprises the information of this alternative frequency;
A signal quality that is detected this original frequency by this signal adapting device is to judge whether this original frequency is disturbed; And
When this original frequency was disturbed, this frequency-modulated transmitter was launched this FM signal with this alternative frequency, to set up above-mentioned new wireless link between this signal adapting device and this target fm broadcast receiver.
2. the automatic update method of wireless link according to claim 1, wherein the step of this sweep frequency modulation frequency range further comprises:
Start this fremodyne, to scan at least one channel with a fixing frequency interval from this original frequency;
Utilize this fremodyne to measure the received signal intensity index of this channel to judge whether this channel is the available channel that is not used; And
When this channel was available channel, this signal adapting device was classified the frequency of this channel as this alternative frequency.
3. the automatic update method of wireless link according to claim 2, wherein, when this channel was the channel that is used, this signal adapting device repeated this scanning step till an available frequency band is detected.
4. the automatic update method of wireless link according to claim 1, the alternative frequency sign indicating number of the information operating radio data system of this alternative frequency wherein, this alternative frequency is enrolled in the alternative frequency sign indicating number of radio data system, and then combine this alternative frequency signal with the service identifying information that is relevant to this FM signal.
5. the automatic update method of wireless link according to claim 1, wherein, the step that detects this signal quality of this original frequency further comprises:
This fremodyne is called in this original frequency, to receive this FM signal;
Measure the signal to noise ratio of this FM signal and in this FM signal, obtain radio data system information;
Whether the radio data system information that comparison obtains in this FM signal conforms to the radio data system information of launching from this frequency-modulated transmitter; And
When comparative result does not conform to when taking place less than in the default critical value at least one with signal to noise ratio, judge that promptly this original frequency is disturbed.
6. the automatic update method of wireless link according to claim 1 wherein further be may further comprise the steps by the step that this signal adapting device is launched this FM signal:
One audio signal is modulated into a frequency modulation analogy format signal, and with this FM signal of the information integrated one-tenth of relevant radio data system after, by the emission of this frequency-modulated transmitter.
7. the automatic update method of wireless link according to claim 1, wherein this FM signal and this target fm broadcast receiver launched of this frequency-modulated transmitter is all compatible with radio data system.
8. signal adapting device in order to receiving an audio signal, and after this audio signal is converted to a FM signal, is sent to a target fm broadcast receiver with this FM signal with an original frequency, and this signal adapting device comprises:
One fremodyne, in order to receive a plurality of received signals, and at least one action in the radio data system information of the received signal intensity index of this received signal of testing, the signal to noise ratio of checking this received signal and this received signal of retrieval, to produce an environmental information signal;
One processor is electrically connected at this fremodyne, and this processor is in order to receive this environmental information signal, searches at least one usable frequency according to this classifying an alternative frequency as, and judges whether this original frequency is disturbed;
One radio data system encoder is electrically connected at this processor, in order to this alternative frequency being weaved into an alternative frequency sign indicating number, and this alternative frequency sign indicating number and the service identifying information that is relevant to this FM signal is formed a radio data system information; And
One frequency-modulated transmitter, be electrically connected at this radio data system encoder and this processor, this frequency-modulated transmitter is in order to receive this audio signal, and this audio signal is modulated into this FM signal that meets frequency modulation analogy form after in conjunction with this radio data system information, and send this FM signal to one target fm broadcast receiver with this original frequency;
Wherein, when this processor judged that this original frequency is interfered, this frequency-modulated transmitter sent this FM signal to this target fm broadcast receiver with this alternative frequency.
9. signal adapting device according to claim 8, wherein this fremodyne receives this received signal with a plurality of frequencies.
10. signal adapting device according to claim 8, wherein signal and this target fm broadcast receiver launched of this frequency-modulated transmitter is compatible with radio data system.
11. signal adapting device according to claim 8, wherein this signal adapting device is arranged on a multimedia playing apparatus inside, to receive this audio signal that this multimedia playing apparatus is exported.
12. signal adapting device according to claim 8, wherein this signal adapting device is arranged on a personal digital assistant inside, to receive this audio signal that this personal digital assistant is exported.
13. signal adapting device according to claim 8, wherein this signal adapting device is arranged on an inside of moving networked devices, moves this audio signal that networked devices is exported to receive this.
14. signal adapting device according to claim 8, wherein this signal adapting device is arranged on a mobile phone inside, to receive this audio signal that this mobile phone is exported.
15. signal adapting device according to claim 8, wherein this signal adapting device is arranged on a digital broacast receiver inside, to receive this audio signal that this digital broacast receiver is exported.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101139920A CN102148623A (en) | 2010-02-05 | 2010-02-05 | Automatic updating method for wireless linkage and signal transferring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101139920A CN102148623A (en) | 2010-02-05 | 2010-02-05 | Automatic updating method for wireless linkage and signal transferring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111697980A (en) * | 2019-03-15 | 2020-09-22 | 安克创新科技股份有限公司 | Automatic channel switching method, vehicle-mounted charger, automatic channel switching system and computer storage medium |
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| CN101253693A (en) * | 2005-09-02 | 2008-08-27 | 皇家飞利浦电子股份有限公司 | Radio broadcasting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20110810 |