CN102624410A - Playing device for closing frequency modulation broadcast automatically and achieving method thereof - Google Patents
Playing device for closing frequency modulation broadcast automatically and achieving method thereof Download PDFInfo
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- CN102624410A CN102624410A CN201210048508XA CN201210048508A CN102624410A CN 102624410 A CN102624410 A CN 102624410A CN 201210048508X A CN201210048508X A CN 201210048508XA CN 201210048508 A CN201210048508 A CN 201210048508A CN 102624410 A CN102624410 A CN 102624410A
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Abstract
The invention discloses a playing device for closing a frequency modulation broadcast automatically and an achieving method thereof. The device comprises a radio frequency module, a signal strength detecting module, a signal strength analysis module and an executing module. The radio frequency module is used for receiving radio frequency signals and processing obtained frequency modulation broadcasting signals. The signal strength detecting module is used for detecting the frequency modulation broadcasting signals to obtain signal strength information of the frequency modulation broadcasting signals. The signal strength analysis module is used for receiving and analyzing the signal strength information and sending executing commands according to analysis results. The executing module is used for executing operation according to the executing commands. The playing device for closing the frequency modulation broadcast automatically and the achieving method solve the problem that users need to adjust a sound source manually in places where the frequency modulation broadcasting signals are poor.
Description
Technical field
The present invention relates to technical field of telecommunications, relate in particular to a kind of audio-frequence player device.
Background technology
FM broadcasting (FM, Frequency Modulation), interference is little owing to having; Sound is clean; Can receive advantages such as stereophonic program, audiorange be wide, be widely used in the various electronic equipments, like in-vehicle player, mobile phone, MP3 player etc.
The publication number that State Intellectual Property Office announced on 09 07th, 2005 is the patent of invention prospectus of CN1665148; A kind of digital broadcasting reception and playing device are disclosed; This device includes a receiver and a player; This receiver is in order to receiving digital broadcast signal, and by wireless communication mode signal is transferred to the player recipient; This player then can receive the signal from receiver by wireless communication mode, and handles and play.This device; Mainly be that receiver and with a digital audio broadcasting signal receiving function has audio signals and handles the player with playing function; Make receiver can select to be seated in preferable reception position, and the signal that is received is transmitted to player via wireless transmission method handles and play with digital audio broadcasting signal receiving function.
Disclosed digital broadcasting reception of foregoing invention and playing device; Can have receiver and result of broadcast preferably in preferable reception position; But, in garage, escalator or subway, can not obtain result of broadcast preferably in the place of some dtr signals; Not only do not have acoustically effect as not closing FM broadcasting this moment, also can waste power supply.If in-vehicle player also may cause the interference to the driver, cause having an accident, cause life or property loss.
Summary of the invention
The purpose of this invention is to provide a kind of playback equipment and its implementation of closing FM broadcasting automatically.
Playback equipment of cutting out FM broadcasting automatically provided by the present invention comprises first sound source, and said first sound source comprises:
Radio-frequency module is used for received RF signal and handles obtaining fm broadcast signal;
The signal strength detection module is used for said fm broadcast signal is detected, thereby obtains the signal strength information of said fm broadcast signal;
The signal strength analysis module is used for receiving, analyzing said signal strength information, and sends execution command according to analysis result;
Executive Module is used for according to said execution command executable operations.
Implementation method of closing FM broadcasting automatically provided by the present invention comprises:
The step 1) received RF signal is also handled the acquisition fm broadcast signal;
Step 2) said fm broadcast signal is detected, thereby obtain the signal strength information of said fm broadcast signal;
Step 3) receives, analyte signal intensity information, and sends execution command according to analysis result;
Step 4) is according to the execution command executable operations.
Playback equipment and its implementation of closing FM broadcasting automatically provided by the present invention; Utilize RSSI value or snr value that signal strength signal intensity is detected; And when signal strength signal intensity is more weak, closes automatically or switch to other frequencies or audiogenic device, solved the problem of user at the not good required manual adjustment source of sound in field of fm broadcast signal; Avoid because the inconvenience that the manual adjustment source of sound brings to the user is disturbed like the driving that the vehicle-mounted playback equipment of adjustment in driving procedure causes.In addition, adjust source of sound automatically, also can avoid when audibility is not good, playing the waste of electric energy brought and the loss of equipment.
Description of drawings
The schematic flow sheet of the implementation method of closing FM broadcasting automatically that Fig. 1 is provided for embodiment three;
The schematic flow sheet of the implementation method of closing FM broadcasting automatically that Fig. 2 is provided for embodiment four.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one
A kind of playback equipment of cutting out FM broadcasting automatically comprises first sound source, it is characterized in that, said first sound source comprises:
Radio-frequency module is used for received RF signal and handles obtaining fm broadcast signal;
The signal strength detection module is used for said fm broadcast signal is detected, thereby obtains the signal strength information of said fm broadcast signal;
The signal strength analysis module is used for receiving, analyzing said signal strength information, and sends execution command according to analysis result;
Executive Module is used for according to said execution command executable operations.
It will be appreciated by those skilled in the art that; After said radio-frequency module received said radiofrequency signal, said signal strength detection module detected the intensity of radiofrequency signal, and signal strength information is sent to said signal strength analysis module; The signal strength analysis module is analyzed said signal strength signal intensity; And sending execution command to Executive Module according to analysis result, said Executive Module is according to said other peripheral equipments of execution command control, to realize closing automatically the function of FM broadcasting.
Further, said radio-frequency module comprises:
Receiving element: be used to receive said radiofrequency signal;
Amplifying unit: be used for the radiofrequency signal that receives is carried out processing and amplifying;
Filter unit: be used for the radiofrequency signal after the processing and amplifying is carried out Filtering Processing, thereby isolate said fm broadcast signal and noise signal;
Demodulating unit: be used for said fm broadcast signal is carried out demodulation process.
It will be understood by those skilled in the art that the radiofrequency signal that said radio-frequency module receives is a high-frequency signal, comprising fm broadcast signal and noise signal, it is carried out further non-processing after, can realize better result of broadcast.Therefore; Receiving element receives and sends to said amplifying unit after the radiofrequency signal and carry out processing and amplifying; Utilize said filter unit to isolate said fm broadcast signal and noise signal, can have better result of broadcast on the one hand, be convenient to the subsequent calculations signal to noise ratio on the other hand; And then utilize said demodulating unit with the near frequency that is suitable for playing of this high-frequency signal.
Further, said signal strength analysis module comprises:
Memory cell: be used for the storage signal intensity threshold;
Clock unit: be used for sending interrupt signal with fixing frequency;
Comparing unit is used for when receiving the interrupt signal of said clock unit, reading said signal strength information and signal strength threshold, and the two is compared, and when said signal strength information during less than said threshold value, sends execution command.
It will be appreciated by those skilled in the art that; Said signal strength threshold can be provided with according to user's demand; When said signal strength information during less than said threshold value; Explain that the result of broadcast of this moment can not satisfy user's demand, need the frequency of adjustment broadcasting or play the audio signal that other audiogenic devices are exported.
It will be appreciated by those skilled in the art that; Said signal strength information can be RSSI (Received Signal Strength Indicator; Receive the signal strength signal intensity indication) value, can learn the intensity of current fm broadcast signal according to this value, in order to obtain said RSSI; The said signal strength detection module of present embodiment comprises:
Power detecting unit: the performance number that is used to detect the said fm broadcast signal of said radio-frequency module output;
RSSI value computing unit: be used for calculating the RSSI value according to said performance number.
Further, the signal strength threshold of preserving in the memory cell described in the present embodiment one is a RSSI value, can set the upper and lower bound of said signal strength threshold according to the user to the requirement of result of broadcast.To the having relatively high expectations of result of broadcast, then in this scope, select bigger value like the user; Lower like the user to the requirement of result of broadcast, then can in this scope, select less value.
Said Executive Module comprises:
Power control unit is used for when receiving said execution command, closing the power supply of first sound source, thereby is implemented in the signal strength signal intensity of current frequency when not good, closes playback equipment automatically.
Said Executive Module can also comprise:
Search unit is used for the time adjusting the receive frequency of said radio-frequency module receiving said execution command, and after the search of all frequencies of completion, sending controling instruction, thus be implemented in the signal strength signal intensity of current frequency when not good, search in other frequencies automatically.
Power control unit: be used for when receiving said control command, closing the power supply of first sound source, thereby when realizing that the signal strength signal intensity of all frequencies is not good, close first sound source automatically.
Further, the playback equipment that present embodiment provided can also comprise:
Handover module is used for when said first sound source is closed, opening second sound source.Thereby realize when the signal strength signal intensity of FM broadcasting is not good, automatically switches to second sound source and playing.It will be understood by those skilled in the art that said second sound source can be any sound source except that FM broadcasting, like MP3 player, mobile phone, multimedia storage card playing device etc.
Embodiment two
Present embodiment two provides another kind of playback equipment of closing FM broadcasting automatically; This embodiment two compares with embodiment one; Said signal strength detection module and signal strength analysis module are improved; Miscellaneous part, equal consistent with described in the embodiment one like radio-frequency module, Executive Module and handover module.
The playback equipment of cutting out FM broadcasting automatically that is provided in the present embodiment two utilizes noise decision signal intensity recently, and said signal strength information is a snr value, so said signal strength detection module, comprising:
Demodulating unit: be used for the said fm broadcast signal of radio-frequency module output is carried out demodulation process;
Signal power detecting unit: the performance number that is used to detect the said fm broadcast signal after demodulation process;
Noise power detecting unit: the performance number that is used to detect the noise signal of said radio-frequency module output;
The snr computation unit; Be used for calculating said snr value according to the performance number of said signal power detecting unit output and the performance number of said noise power detecting unit output.
Accordingly, the signal strength threshold of preserving in the memory cell described in the present embodiment two is a snr value, can set the upper and lower bound of said snr value according to the user to the requirement of result of broadcast.To the having relatively high expectations of result of broadcast, then in this scope, select bigger value like the user; Lower like the user to the requirement of result of broadcast, then can in this scope, select less value.
Embodiment three
As shown in Figure 1, a kind of implementation method of closing FM broadcasting automatically is characterized in that, comprising:
The step 1) received RF signal is also handled the acquisition fm broadcast signal;
Step 2) said fm broadcast signal is detected, thereby obtain the signal strength information of said fm broadcast signal;
Step 3) receives, analyte signal intensity information, and sends execution command according to analysis result;
Step 4) is according to the execution command executable operations.
Said step 1) received RF signal is also handled the acquisition fm broadcast signal, comprising:
The step 11) received RF signal;
Step 12) is carried out processing and amplifying to the radiofrequency signal that receives;
The radiofrequency signal of step 13) after to processing and amplifying carried out Filtering Processing, thereby isolates said fm broadcast signal and noise signal;
Step 14) is carried out demodulation process to said fm broadcast signal.
Said step 3) receives, analyte signal intensity information, and sends execution command according to analysis result, specifically comprises:
Step 31) input signal strength threshold value and being kept in the memory cell;
Step 32) comparing unit receives interrupt signal and gets into and interrupts;
Step 33) comparing unit reads said signal strength information and signal strength threshold, and the two is compared, and when said signal strength information during less than said threshold value, sends execution command.
Described in embodiment one, said signal strength information can be RSSI (Received Signal Strength Indicator receives a signal strength signal intensity indication) value; Can learn the intensity of current fm broadcast signal according to this value; In order to obtain said RSSI value, in order to obtain said RSSI value, said step 2) said fm broadcast signal is detected; Thereby obtain the signal strength information of said fm broadcast signal, specifically comprise:
Step 121) performance number of the said fm broadcast signal of the said radio-frequency module output of detection;
Step 122) calculates the RSSI value according to said performance number.
Signal strength threshold is a RSSI value described in present embodiment one, can be set at the upper and lower bound of said signal strength threshold according to the user to the requirement of result of broadcast.In arbitrary value.To the having relatively high expectations of result of broadcast, then in this scope, select bigger value like the user; Lower like the user to the requirement of result of broadcast, then can in this scope, select less value.
Said step 4) specifically comprises according to the execution command executable operations:
Step 141) power control unit receives said execution command;
Step 142) power supply of said first sound source is closed in power control unit control.When thereby the signal strength signal intensity that is implemented in current frequency is not good, close playback equipment automatically.
Said step 4) can also specifically comprise according to the execution command executable operations:
Step 241) search unit receives said execution command;
Step 242) search unit is adjusted the receive frequency of said radio-frequency module, and after the search of accomplishing all frequencies, sending controling instruction.
Step 243) power control unit receives said control command;
Step 244) power supply of said first sound source is closed in power control unit control.
When thereby the signal strength signal intensity that is implemented in current frequency is not good, search in other frequencies automatically, and when the signal strength signal intensity of all frequencies is not good, close first sound source automatically.
Further, in the power supply of closing said first sound source, can also open second sound source.Thereby realize when the signal strength signal intensity of FM broadcasting is not good, automatically switches to second sound source and playing.It will be understood by those skilled in the art that said second sound source can be any sound source except that FM broadcasting, like MP3 player, mobile phone, multimedia storage card playing device etc.
Embodiment four
Present embodiment four provides another kind of implementation method of closing FM broadcasting automatically, this embodiment four and embodiment three ratios, said step 2) said fm broadcast signal is detected, thus obtain the signal strength information of said fm broadcast signal; And said step 3) receives, analyte signal intensity information, and sends execution command according to analysis result, improves; Other steps obtain fm broadcast signal like step 1) received RF signal and processing; Step 4) and in the power supply of closing said first sound source, can also be opened the step of second sound source according to the execution command executable operations, and is all described consistent with embodiment three.
As shown in Figure 2; The implementation method of closing FM broadcasting automatically that is provided in the present embodiment four; Utilize noise decision signal intensity recently, said signal strength information is a snr value, therefore said step 2) said fm broadcast signal is detected; Thereby obtain the signal strength information of said fm broadcast signal, specifically comprise:
Step 221) the said fm broadcast signal to radio-frequency module output carries out demodulation process;
Step 222) performance number of the said fm broadcast signal of detection after demodulation process;
Step 223) is used for the noise power detecting unit: the performance number that is used to detect the noise signal of said radio-frequency module output;
Step 224) calculates said snr value according to the performance number of said signal power detecting unit output and the performance number of said noise power detecting unit output.
Accordingly, said signal strength threshold is a snr value, can set the upper and lower bound of said snr value according to the user to the requirement of result of broadcast.To the having relatively high expectations of result of broadcast, then in this scope, select bigger value like the user; Lower like the user to the requirement of result of broadcast, then can in this scope, select less value.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (18)
1. a playback equipment of cutting out FM broadcasting automatically comprises first sound source, it is characterized in that, said first sound source comprises:
Radio-frequency module is used for received RF signal and handles obtaining fm broadcast signal;
The signal strength detection module is used for said fm broadcast signal is detected, thereby obtains the signal strength information of said fm broadcast signal;
The signal strength analysis module is used for receiving, analyzing said signal strength information, and sends execution command according to analysis result;
Executive Module is used for according to said execution command executable operations.
2. playback equipment as claimed in claim 1 is characterized in that, said radio-frequency module comprises:
Receiving element is used to receive said radiofrequency signal;
Amplifying unit is used for the radiofrequency signal that receives is carried out processing and amplifying;
Filter unit is used for the radiofrequency signal after the processing and amplifying is carried out Filtering Processing, thereby isolates said fm broadcast signal and noise signal;
Demodulating unit is used for said fm broadcast signal is carried out demodulation process.
3. according to claim 1 or claim 2 playback equipment is characterized in that said signal strength analysis module comprises:
Memory cell: be used for the storage signal intensity threshold;
Clock unit: be used for sending interrupt signal with fixing frequency;
Comparing unit is used for when receiving the interrupt signal of said clock unit, reading said signal strength information and signal strength threshold, and the two is compared, and when said signal strength information during less than said threshold value, sends execution command.
4. playback equipment as claimed in claim 3 is characterized in that, said signal strength detection module comprises:
Power detecting unit: the performance number that is used to detect the said fm broadcast signal of said radio-frequency module output;
RSSI value computing unit: be used for calculating the RSSI value according to said performance number.
5. playback equipment as claimed in claim 3 is characterized in that, said signal strength detection module comprises:
Demodulating unit: be used for the said fm broadcast signal of radio-frequency module output is carried out demodulation process;
Signal power detecting unit: the performance number that is used to detect the said fm broadcast signal after demodulation process;
Noise power detecting unit: the performance number that is used to detect the noise signal of said radio-frequency module output;
The snr computation unit; Be used for calculating said snr value according to the performance number of said signal power detecting unit output and the performance number of said noise power detecting unit output.
6. like claim 4 or 5 described playback equipments, it is characterized in that said Executive Module comprises:
Power control unit is used for the time closing the power supply of first sound source receiving said execution command.
7. playback equipment as claimed in claim 6 is characterized in that, also comprises:
Handover module is used for when said first sound source is closed, opening second sound source.
8. like claim 4 or 5 described playback equipments, it is characterized in that said Executive Module comprises:
Search unit is used for the time adjusting the receive frequency of said radio-frequency module receiving said execution command, and after the search of all frequencies of completion, sending controling instruction;
Power control unit: the power supply that is used for when receiving said control command, closing first sound source.
9. playback equipment as claimed in claim 8 is characterized in that, also comprises:
Handover module is used for when said first sound source is closed, opening second sound source.
10. an implementation method of closing FM broadcasting automatically is characterized in that, comprising:
The step 1) received RF signal is also handled the acquisition fm broadcast signal;
Step 2) said fm broadcast signal is detected, thereby obtain the signal strength information of said fm broadcast signal;
Step 3) receives, analyte signal intensity information, and sends execution command according to analysis result;
Step 4) is according to the execution command executable operations.
11. implementation method as claimed in claim 10 is characterized in that, said step 1) comprises:
The step 11) received RF signal;
Step 12) is carried out processing and amplifying to the radiofrequency signal that receives;
The radiofrequency signal of step 13) after to processing and amplifying carried out Filtering Processing, thereby isolates said fm broadcast signal and noise signal;
Step 14) is carried out demodulation process to said fm broadcast signal.
12., it is characterized in that said step 3) comprises like claim 10 or 11 described implementation methods:
Step 31) signalization intensity threshold and being kept in the memory cell;
Step 32) comparing unit receives interrupt signal and gets into and interrupts;
Step 33) comparing unit reads said signal strength information and signal strength threshold, and the two is compared, and when said signal strength information during less than said threshold value, sends execution command.
13. implementation method as claimed in claim 12 is characterized in that, said step 2) comprising:
Step 121) performance number of the said fm broadcast signal of the said radio-frequency module output of detection;
Step 122) calculates the RSSI value according to said performance number.
14. implementation method as claimed in claim 12 is characterized in that, said step 2) comprising:
Step 221) the said fm broadcast signal to radio-frequency module output carries out demodulation process;
Step 222) performance number of the said fm broadcast signal of detection after demodulation process;
Step 223) is used for the noise power detecting unit: the performance number that is used to detect the noise signal of said radio-frequency module output;
Step 224) calculates said snr value according to the performance number of said signal power detecting unit output and the performance number of said noise power detecting unit output.
15., it is characterized in that said step 4) comprises like claim 13 or 14 described implementation methods:
Step 141) power control unit receives said execution command;
Step 142) power supply of said first sound source is closed in power control unit control.
16. implementation method as claimed in claim 15 is characterized in that: in the power supply of closing said first sound source, open second sound source.
17., it is characterized in that said step 4) comprises like claim 13 or 14 described implementation methods:
Step 241) search unit receives said execution command;
Step 242) search unit is adjusted the receive frequency of said radio-frequency module, and after the search of accomplishing all frequencies, sending controling instruction;
Step 243) power control unit receives said control command;
Step 244) power supply of said first sound source is closed in power control unit control.
18. implementation method as claimed in claim 17 is characterized in that: in the power supply of closing said first sound source, open second sound source.
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| CN201210048508XA CN102624410A (en) | 2012-02-29 | 2012-02-29 | Playing device for closing frequency modulation broadcast automatically and achieving method thereof |
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| CN201210048508XA CN102624410A (en) | 2012-02-29 | 2012-02-29 | Playing device for closing frequency modulation broadcast automatically and achieving method thereof |
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| WO2016145824A1 (en) * | 2015-09-08 | 2016-09-22 | 中兴通讯股份有限公司 | Signal processing circuit, method and user equipment |
| CN107195315A (en) * | 2017-07-25 | 2017-09-22 | 成都德芯数字科技股份有限公司 | Audio broadcast control device and method |
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Application publication date: 20120801 |