CN101741495A - RDS (remote data service) receiver and receiving method thereof - Google Patents
RDS (remote data service) receiver and receiving method thereof Download PDFInfo
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- CN101741495A CN101741495A CN200810177411A CN200810177411A CN101741495A CN 101741495 A CN101741495 A CN 101741495A CN 200810177411 A CN200810177411 A CN 200810177411A CN 200810177411 A CN200810177411 A CN 200810177411A CN 101741495 A CN101741495 A CN 101741495A
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Abstract
The invention provides an RDS (remote data service) receiver and receiving method thereof, which can reduce useless auto-tracing switching actions of AD (audio frequency) searching and the like. The RDS receiver is used for receiving RDS broadcast and is characterized by comprising a receiving state detection unit, a receiving state judging unit and a control unit; wherein the receiving state detection unit is used for detecting the receiving state of the received RDS broadcast, the receiving state judging unit is used for judging the grade of the detected out receiving state, the control unit is used for carrying out the auto-tracing switching actions based on an AF retrieval; and when the grade changes into a preset changing mode within a schedule time, the control unit does not carry out the auto-tracing switching actions based on the AF retrieval.
Description
Technical field
The present invention relates to RDS receiver and method of reseptance thereof, particularly can automatically switch to the RDS receiver and the method for reseptance in the broadcasting station of the good broadcasting same program of accepting state.
Background technology
So-called " RDS " (radio data system) is a kind of radio data system, the broadcasting station sends with digital signaling after the RDS data such as station name, program category and programme content multiplexing on the subcarrier of FM (frequency modulation) broadcast singal, receives and identifies these digital signals and look the hearer by the RDS receiver.Though FM broadcasting has advantages such as tonequality is good, the distance of broadcast singal transmission is short, so the big program in overlay area need be broadcasted the program of identical content simultaneously in different regions with different frequencies, could guarantee the view quality of whole overlay area.
In the multiplexing RDS data on subcarrier, there is one to be known as " AF " (AlternativeFrequencies: data changeable frequency), the frequency inventory in the broadcasting station of the same program of expression transmission.The RDS receiver can utilize RDS data such as these AF data, carries out the AF search.
For example, working as the user by having the mobile phone of RDS function, vehicle electronic devices etc. movably RDS receiver are listened to frequency A under the situation of program of " traffic platform " of Beijing area, if the user is more and more away from the Beijing area, then broadcast singal dies down gradually until disappearance, when broadcast singal is lower than a certain prescribed level, other broadcasting frequency except that frequency A that the utilization of RDS receiver is searched for " traffic platform " automatically based on the AF function of search of AF inventory (for example comprises frequency B, C, D), therefrom selective reception frequency B in the best state continues to listen to the program of " traffic platform ".
All the time, carry out AF when search, in order to prevent to be subjected to influence such as noise, and need quietly within a certain period of time, that is, interrupt the reception in present broadcasting station, sound is temporarily eliminated the noise at certain hour at the RDS receiver.So, though for the user who is in moving,, be difficult for discovering, for the user who is in static, because of carrying out AF search noise elimination temporarily, and can bring the sensation of user's discomfort because it is very short to carry out the certain hour of AF search.
In order to address this problem, following technology being disclosed in patent documentation 1 (Japanese kokai publication hei 7-111467): by setting the time interval of carrying out the AF search at random, the discomfort that brings the user is felt to be suppressed to minimum.
But, all unsettled situation etc. is in particular cases to move to reception level that situation, RDS receiver outside the overlay area move to the area of the same program that can receive a plurality of frequencies simultaneously and a plurality of frequencies at for example RDS receiver, frequently do not carry out the AF hunting action because there being the channel that is fit to, so can make useless AF search wait the action of automaticallying switch to increase.
Summary of the invention
The present invention puts forward at the problems referred to above, and its purpose is to provide a kind of RDS receiver and method of reseptance thereof, can reduce the useless automatic change actions of following the trail of such as AF search.
RDS receiver of the present invention receives RDS broadcasting, it is characterized in that possessing: the accepting state of the described RDS broadcasting that accepting state detecting unit, detection receive; The accepting state judging unit is judged the rank of detected accepting state; And control unit, corresponding to described rank, carry out automatic tracking change action based on the AF retrieval; When described rank at the appointed time be changed to predefined changing pattern the time, described control unit does not carry out described automatic tracking change action based on AF retrieval.
In RDS receiver of the present invention, above-mentioned accepting state comprises at least one in the error rate of received electric field strength, multichannel interference, adjacent interference, RDS broadcasting.
In RDS receiver of the present invention, above-mentioned automatic tracking change action comprises that the AF inventory based on acquisition from RDS broadcasting carries out the action of AF retrieval, switches to reception from least one action in the action of the RDS broadcasting in identical other broadcasting stations that are different from the current broadcast station of the program of program of broadcasting and the broadcasting of current broadcast station.
In RDS receiver of the present invention, above-mentioned predefined changing pattern is that the rank of expression accepting state is continuously the poorest other pattern of level.
In RDS receiver of the present invention, when described rank at the appointed time be changed to predefined changing pattern the time, do not carry out described automatic tracking change action in the given time based on AF retrieval.
The method of reseptance of RDS broadcasting of the present invention is characterized in that possessing following steps: accepting state detects step, detects the accepting state of the described RDS broadcasting that receives; The accepting state determining step is judged the rank of detected accepting state; Controlled step corresponding to described rank, is carried out the automatic tracking change action based on the AF retrieval; In above-mentioned controlled step, when described rank at the appointed time be changed to predefined changing pattern the time, do not carry out described automatic tracking change action based on AF retrieval.
According to RDS receiver of the present invention and method of reseptance thereof, when described rank at the appointed time be changed to predefined changing pattern the time, do not carry out described automatic tracking change action, so can reduce the useless automatic change actions of following the trail of such as AF search based on the AF retrieval.
Description of drawings
Fig. 1 is the structured flowchart that the RDS receiver of embodiment of the present invention 1 schematically is shown.
Fig. 2 A～Fig. 2 H is the rank changing pattern at the appointed time of the accepting state of expression RDS broadcasting of the present invention.
Fig. 3 is the structured flowchart of the RDS receiver of embodiment of the present invention 2.
Fig. 4 is the flow chart of RDS operation of receiver of the present invention.
Embodiment
(execution mode 1)
At first, see figures.1.and.2 embodiments of the present invention 1 are described.
Fig. 1 is the structured flowchart that the RDS receiver 100 of embodiment of the present invention 1 schematically is shown.As shown in Figure 1, RDS receiver 100 comprises accepting state detecting unit 110, accepting state judging unit 120 and control unit 130.
The accepting state that the RDS from the broadcasting station that 110 detections of accepting state detecting unit receive broadcasts.The method that detects accepting state is same as the prior art, does not specify at this.For example, can be with detected S/M (Signal Meter, received electric field strength), M/P (MultiPass, the multichannel interference), A/I (Adjacent channel interference, adjacent interference) and in the SYNC parameters such as (SYNC COUNT, the error rates of RDS broadcasting) one of at least as accepting state.
Accepting state judging unit 120 is according to pre-defined rule, judges the rank of the accepting state that accepting state detecting unit 110 is detected.
For example, the value of setting S/M and M/P is 0～5V, is converted to 4 bit digital signal by A/D converter, and setting SYNC is the quantity of the synchronization blocks between 1 second, and the interference between the adjacent channel is converted into digital signal.And the more little then accepting state of value of setting S/M is poor more, and the big more then accepting state of the value of M/P, A/I is poor more.
[table 1] S/M parameter A/D change list (example)
| 8bit magnitude of voltage (V) | The 4bit transformed value | 8bit magnitude of voltage (V) | The 4bit transformed value |
| ??0～0.29 | ??0 | ??2.05～2.34 | ??8 |
| ??0.31～0.61 | ??1 | ??2.36～2.54 | ??9 |
| ??0.22～0.63 | ??2 | ??2.56～2.73 | ??A |
| ??0.76～0.9 | ??3 | ??2.75～3.03 | ??B |
| ??0.92～1.19 | ??4 | ??3.05～3.28 | ??C |
| ??1.21～1.54 | ??5 | ??3.3～3.79 | ??D |
| ??1.56～1.8 | ??6 | ??3.81～4.67 | ??E |
| ??1.82～2.03 | ??7 | ??4.69～5.0 | ??F |
[table 2] M/P parameter A/D change list (example)
| 8bit magnitude of voltage (V) | The 4bit transformed value | 8bit magnitude of voltage (V) | The 4bit transformed value |
| ??0～0.099 | ??F | ??1.4～1.6 | ??7 |
| ??0.1～0.21 | ??E | ??1.6～1.8 | ??6 |
| ??0.22～0.4 | ??D | ??1.8～2.0 | ??5 |
| ??0.4～0.6 | ??C | ??2.0～2.2 | ??4 |
| ??0.6～0.8 | ??B | ??2.2～2.4 | ??3 |
| ??0.8～1.0 | ??A | ??2.4～2.6 | ??2 |
| ??1.0～1.2 | ??9 | ??2.6～2.8 | ??1 |
| ??1.2～1.4 | ??8 | ??2.8～5.0 | ??0 |
[table 3] accepting state rank correspondence table (example)
| The rank of accepting state | ??S/M | ??M/P | ??A/I | ??SYNC |
| ??0 | ??A～F | ??C～F | ??E～F | ??26～48 |
| ??1 | ??8～9 | ??--- | ??--- | ??--- |
| ??2 | ??6～7 | ??A～B | ??B～D | ??11～25 |
| ??3 | ??0～5 | ??8～9 | ??7～A | ??0～10 |
| ??4 | ??--- | ??0～7 | ??0～6 | ??--- |
The pairing automatic tracking change action of each rank of [table 4] accepting state
| The rank of accepting state | Automatic tracking change action based on the AF retrieval |
| ??0 | Attonity |
| ??1 | Automatically follow the trail of change action 1 (carrying out the AF retrieval) |
| ??2 | Automatically follow the trail of change action 2 (detecting 3 seconds) if the rank of accepting state still is not 0 switching channels |
| ??3 | Automatically follow the trail of change action 3 (detecting 2 seconds) if the rank of accepting state still is not 0 switching channels |
| ??4 | Automatically follow the trail of change action 4 (switching channels immediately) |
Then, be example with reference to table 1～4 with accepting state detecting unit 110 detected S/M, M/P parameter, the work of accepting state judging unit 120 and control unit 130 is described.
For example, when only determining the rank of accepting state according to the S/M parameter, as above shown in the table, when accepting state detecting unit 110 detected S/M parameters as accepting state are the magnitude of voltage of 0～5V, at first carry out mould/number conversion according to table 1, determine the rank that it is corresponding according to table 3 then, carry out and the corresponding automatic tracking change action of the rank of accepting state according to table 4 at last.
For example, when only determining the rank of accepting state according to the M/P parameter, as above shown in the table, when accepting state detecting unit 110 detected M/P parameters as accepting state are the magnitude of voltage of 0～5V, at first carry out mould/number conversion according to table 2, determine the rank that it is corresponding according to table 3 then, carry out and the corresponding automatic tracking change action of the rank of accepting state according to table 4 at last.
More than enumerated the rank of judging accepting state according to S/M or M/P, can certainly according to circumstances carry out various variations, for example, except judge the rank of accepting state according to one of parameters such as S/M, M/P, A/I and SYNC, also can these parameters of combination in any judge the rank of accepting state.
Certainly, the value in table 1～4 and each rank and corresponding automatic tracking change action thereof only for for example, can freely be set as required.For example, in table 1 and the table 2 the 8bit magnitude of voltage is transformed to 0-F (hexadecimal), can certainly be changed to 0-256 (decimal system) and waits other values.
At RDS receiver of the present invention, when the rank of accepting state at the appointed time be changed to predefined changing pattern the time, control unit 130 is not followed the trail of change action automatically.
Fig. 2 A～Fig. 2 H is the rank changing pattern at the appointed time of the accepting state of expression RDS broadcasting of the present invention.
When the rank of accepting state in 5 sense cycle be changed to changing pattern shown in Fig. 2 A～Fig. 2 G the time, the rank of the accepting state of the 5th sense cycle is respectively rank 2,3,4,0,0,4,4, so then follow the trail of change action 2,3,4,0 (attonity), 0,4,4 respectively automatically.
When the rank of accepting state in 5 sense cycle be changed to changing pattern shown in Fig. 2 D the time, the rank of the accepting state of 5 sense cycle is 0 always, the accepting state of expression RDS broadcasting is good always, so next do not carry out any automatic tracking change action.
And when the rank of accepting state in 5 sense cycle be changed to changing pattern shown in Fig. 2 H the time, the rank of the accepting state of 5 sense cycle is 4 always, the accepting state of expression RDS broadcasting is the poorest always, be in outside the coverage of broadcasting station probably or conductively-closed and can not normally receiving under the unusual conditions such as RDS broadcasting, even switching channels also can not clearly receive identical program, so then do not carry out any automatic tracking change action.So, can reduce useless automatic tracking change action, thereby reduce unnecessary quiet operation, reduce the sensation of user's discomfort.
More than, for example understand accepting state rank variation at the appointed time pattern and after the stipulated time with the corresponding automatic tracking change action of this changing pattern based on the AF retrieval.But above-mentioned changing pattern is not limited thereto, and the stipulated time can not be 5 sense cycle but other suitable periodicity.In addition, in above-mentioned example, do not carry out any automatic tracking change action when changing figure, but can be that (accepting state is the poorest other cycle of level to continue the situation more than the some cycles) do not carry out any automatic tracking change action when changing figure for Fig. 2 F yet yet for Fig. 2 H.
(execution mode 2)
Then, with reference to Fig. 3 embodiments of the present invention 2 are described.
Fig. 3 is the structured flowchart of the RDS receiver of embodiment of the present invention 2.As shown in Figure 3, RDS receiver 300 comprises: antenna 301 receives RDS broadcasting and waits electric wave signal from the broadcasting station; Front end 302, the signal transformation that will receive from antenna 301 is the IF signal; Wave detector IF/DET303 carries out detection to the IF signal; RDS demodulation section 308 carries out demodulation to the signal of wave detector IF/DET303 detection; S/M test section (accepting state detecting unit) 310, the intensity of detection received signal, i.e. S/M parameter; Controller (control unit) 340, restituted signal and signal strength signal intensity according to RDS demodulator 308, control PLL (phase-locked loop) circuit 309, thus realize switching to the action of reception from the RDS broadcasting in the program of broadcasting other broadcasting stations that are different from the current broadcast station identical with the program of current broadcast station broadcasting.PLL circuit 309 is controlled the receive frequency of front end 302 according to the control of controller 340.
RDS receiver 300 also comprises: volume adjusting portion 304; Quiet 305; Enlarging section AMP 306; Loud speaker 307; Navigation controller 350; Video circuit 360; Display 370; Input part 380 is imported by button.
Controller 340 in the RDS receiver 300 comprises: RDS data analysis portion 342, to analyzing from the data of RDS demodulation section 308; Accepting state detection unit 343 is to judging from the data of S/M test section 310; Action determination section 330 according to the analysis result of RDS data analysis portion 342 and accepting state detection unit 343, is controlled receiving platform configuration part 342; Receiving platform configuration part 342 according to the control of action determination section 330, is selected to set to the platform that receives.
(execution mode 3)
The workflow of RDS receiver of the present invention then, is described with reference to Fig. 4.
Fig. 4 is the flow chart of RDS operation of receiver of the present invention.As shown in Figure 4, at first, the RDS receiver detects the accepting state (step S400) of the described RDS broadcasting that receives.Then, judge the rank (step S401) of detected accepting state.Then, whether the rank variation at the appointed time of judging accepting state is predefined pattern (step S402).
When step S402 be judged as "Yes" the time, do not carry out automatic tracking change action (step S403) based on the AF retrieval, when step S402 be judged as "No" the time, carry out automatic tracking change action (step S404) based on AF retrieval, return step S400 then.
Three execution modes of RDS receiver of the present invention more than have been described, but have the invention is not restricted to this, also can change, or three execution modes have been carried out combination in any.For example, in execution mode 2, the controller 340 of RDS receiver 300 comprises accepting state detection unit 343, and accepting state detection unit 343 can certainly be set separately.In addition, in execution mode 2, be provided with S/M test section 310, M/P test section, A/I test section, SYNC test section can certainly be set replace S/M test section 310, perhaps each test section of combination in any as the accepting state detecting unit.In addition, can also after carrying out step S403, execution mode 3 be provided with through returning the step of step S400 after the stipulated time.
Claims (10)
1. a RDS receiver receives RDS broadcasting, it is characterized in that possessing:
The accepting state of the described RDS broadcasting that accepting state detecting unit, detection receive;
The accepting state judging unit is judged the rank of detected accepting state; And
Control unit corresponding to described rank, carries out the automatic tracking change action based on the AF retrieval;
When described rank at the appointed time be changed to predefined changing pattern the time, described control unit does not carry out described automatic tracking change action based on AF retrieval.
2. RDS receiver as claimed in claim 1, wherein,
Above-mentioned accepting state comprises at least one in the error rate of received electric field strength, multichannel interference, adjacent interference, RDS broadcasting.
3. RDS receiver as claimed in claim 1, wherein,
Above-mentioned automatic tracking change action comprises that the AF inventory based on acquisition from RDS broadcasting carries out the action of AF retrieval, switches to reception from least one action in the action of the RDS broadcasting in identical other broadcasting stations that are different from the current broadcast station of the program of program of broadcasting and the broadcasting of current broadcast station.
4. RDS receiver as claimed in claim 1, wherein,
Above-mentioned predefined changing pattern is that the rank of expression accepting state is continuously the poorest other pattern of level.
5. as the described RDS receiver of one of claim 1 to 4, wherein,
When described rank at the appointed time be changed to predefined changing pattern the time, do not carry out described automatic tracking change action in the given time based on AF retrieval.
6. the method for reseptance of RDS broadcasting is characterized in that possessing following steps:
Accepting state detects step, detects the accepting state of the described RDS broadcasting that receives;
The accepting state determining step is judged the rank of detected accepting state;
Controlled step corresponding to described rank, is carried out the automatic tracking change action based on the AF retrieval;
In above-mentioned controlled step, when described rank at the appointed time be changed to predefined changing pattern the time, do not carry out described automatic tracking change action based on AF retrieval.
7. the method for reseptance of RDS broadcasting as claimed in claim 6, wherein,
Above-mentioned accepting state comprises at least one in the error rate of received electric field strength, multichannel interference, adjacent interference, RDS broadcasting.
8. the method for reseptance of RDS broadcasting as claimed in claim 6, wherein,
Above-mentioned automatic tracking change action comprises that the AF inventory based on acquisition from RDS broadcasting carries out the action of AF retrieval, switches to reception from least one action in the action of the RDS broadcasting in identical other broadcasting stations that are different from the current broadcast station of the program of program of broadcasting and the broadcasting of current broadcast station.
9. the method for reseptance of RDS broadcasting as claimed in claim 6, wherein,
Above-mentioned predefined changing pattern is that the rank of expression accepting state is continuously the poorest other pattern of level.
10. as the method for reseptance of the described RDS of claim 6 to 9 broadcasting, wherein,
When described rank at the appointed time be changed to predefined changing pattern the time, do not carry out described automatic tracking change action in the given time based on AF retrieval.
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| CN200810177411A CN101741495A (en) | 2008-11-27 | 2008-11-27 | RDS (remote data service) receiver and receiving method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104868964A (en) * | 2014-12-19 | 2015-08-26 | 北汽福田汽车股份有限公司 | Automatic on-board radio channel switching system and method |
| CN104868965A (en) * | 2014-12-19 | 2015-08-26 | 北汽福田汽车股份有限公司 | Automatic on-board radio frequency adjustment system and method |
| CN107564256A (en) * | 2017-08-13 | 2018-01-09 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle audio RDS systems and software supervision method |
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2008
- 2008-11-27 CN CN200810177411A patent/CN101741495A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868964A (en) * | 2014-12-19 | 2015-08-26 | 北汽福田汽车股份有限公司 | Automatic on-board radio channel switching system and method |
| CN104868965A (en) * | 2014-12-19 | 2015-08-26 | 北汽福田汽车股份有限公司 | Automatic on-board radio frequency adjustment system and method |
| CN104868965B (en) * | 2014-12-19 | 2018-10-09 | 北京宝沃汽车有限公司 | Vehicle-mounted radio unit frequency automatic regulating system and method |
| CN107564256A (en) * | 2017-08-13 | 2018-01-09 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle audio RDS systems and software supervision method |
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Open date: 20100616 |